#!/usr/bin/env bash
# configure script for zlib.
#
# Normally configure builds both a static and a shared library.
# If you want to build just a static library, use: ./configure --static
#
# To impose specific compiler or flags or install directory, use for example:
#    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
# or for csh/tcsh users:
#    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)

# Incorrect settings of CC or CFLAGS may prevent creating a shared library.
# If you have problems, try without defining CC and CFLAGS before reporting
# an error.

# start off configure.log
echo -------------------- >> configure.log
echo $0 $* >> configure.log
date >> configure.log

SRCDIR=$(cd $(dirname $0); pwd)
BUILDDIR=$(pwd)

# set command prefix for cross-compilation
if [ -n "${CHOST}" ]; then
    uname="`echo "${CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/'`"
    CROSS_PREFIX="${CHOST}-"
    ARCH="`echo "${CHOST}" | sed -e 's/-.*//'`"
else
    ARCH="`uname -m`"
fi

case "${ARCH}" in
    x86_64)
        case "${CFLAGS}" in
            *-m32*)
                ARCH=i686
            ;;
        esac
    ;;
    i386 | i486 | i586 | i686)
        case "${CFLAGS}" in
            *-m64*)
                ARCH=x86_64
            ;;
        esac
    ;;
esac

# destination name for windows import library
IMPORTLIB=

# establish commands for library building
if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
    AR=${AR-"${CROSS_PREFIX}ar"}
    test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
else
    AR=${AR-"ar"}
    test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
fi
ARFLAGS=${ARFLAGS-"rc"}
if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
    RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
    test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
else
    RANLIB=${RANLIB-"ranlib"}
fi

# set defaults before processing command line options
LDCONFIG=${LDCONFIG-"ldconfig"}
LDFLAGS=${LDFLAGS-"-L."}
LDSHAREDLIBC="${LDSHAREDLIBC--lc}"
DEFFILE=
RC=
RCFLAGS=
RCOBJS=
STRIP=
ARCHS=
prefix=${prefix-/usr/local}
exec_prefix=${exec_prefix-'${prefix}'}
bindir=${bindir-'${exec_prefix}/bin'}
libdir=${libdir-'${exec_prefix}/lib'}
sharedlibdir=${sharedlibdir-'${libdir}'}
includedir=${includedir-'${prefix}/include'}
mandir=${mandir-'${prefix}/share/man'}
shared_ext='.so'
shared=1
gzfileops=0
compat=0
cover=0
build32=0
build64=0
buildacle=1
buildneon=1
builddfltccdeflate=0
builddfltccinflate=0
with_sanitizers=0
with_msan=0
with_fuzzers=0
floatabi=
native=0
forcesse2=0
avx2flag="-mavx2"
sse2flag="-msse2"
sse4flag="-msse4"
sse42flag="-msse4.2"
pclmulflag="-mpclmul"
without_optimizations=0
without_new_strategies=0
gcc=0
warn=0
debug=0
old_cc="$CC"
old_cflags="$CFLAGS"
OBJC='$(OBJZ)'
PIC_OBJC='$(PIC_OBJZ)'
INSTALLTARGETS="install-shared install-static"
UNINSTALLTARGETS="uninstall-shared uninstall-static"

TEST="teststatic"

# leave this script, optionally in a bad way
leave()
{
  if test "$*" != "0"; then
    echo "** $0 aborting." | tee -a configure.log
  fi
  rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version
  echo -------------------- >> configure.log
  echo >> configure.log
  echo >> configure.log
  exit $1
}

# process command line options
while test $# -ge 1
do
case "$1" in
    -h* | --help)
      echo 'usage:' | tee -a configure.log
      echo '  configure [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
      echo '    [--static] [--32] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
      echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
      echo '    [--warn]                    Enables extra compiler warnings' | tee -a configure.log
      echo '    [--debug]                   Enables extra debug prints during operation' | tee -a configure.log
      echo '    [--zlib-compat]             Compiles for zlib-compatible API instead of zlib-ng API' | tee -a configure.log
      echo '    [--with-gzfileops]          Compiles with the gzfile parts of the API enabled' | tee -a configure.log
      echo '    [--without-optimizations]   Compiles without support for optional instruction sets' | tee -a configure.log
      echo '    [--without-new-strategies]  Compiles without using new additional deflate strategies' | tee -a configure.log
      echo '    [--without-acle]            Compiles without ARM C Language Extensions' | tee -a configure.log
      echo '    [--without-neon]            Compiles without ARM Neon SIMD instruction set' | tee -a configure.log
      echo '    [--with-dfltcc-deflate]     Use DEFLATE CONVERSION CALL instruction for compression on IBM Z' | tee -a configure.log
      echo '    [--with-dfltcc-inflate]     Use DEFLATE CONVERSION CALL instruction for decompression on IBM Z' | tee -a configure.log
      echo '    [--force-sse2]              Assume SSE2 instructions are always available (disabled by default on x86, enabled on x86_64)' | tee -a configure.log
      echo '    [--with-sanitizers]         Build with address sanitizer and all supported sanitizers other than memory sanitizer (disabled by default)' | tee -a configure.log
      echo '    [--with-msan]               Build with memory sanitizer (disabled by default)' | tee -a configure.log
      echo '    [--with-fuzzers]            Build test/fuzz (disabled by default)' | tee -a configure.log
        exit 0 ;;
    -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
    -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
    -l*=* | --libdir=*) libdir=`echo $1 | sed 's/.*=//'`; shift ;;
    --sharedlibdir=*) sharedlibdir=`echo $1 | sed 's/.*=//'`; shift ;;
    -i*=* | --includedir=*) includedir=`echo $1 | sed 's/.*=//'`;shift ;;
    -u*=* | --uname=*) uname=`echo $1 | sed 's/.*=//'`;shift ;;
    -p* | --prefix) prefix="$2"; shift; shift ;;
    -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
    -l* | --libdir) libdir="$2"; shift; shift ;;
    -i* | --includedir) includedir="$2"; shift; shift ;;
    -s* | --shared | --enable-shared) shared=1; shift ;;
    -t | --static) shared=0; shift ;;
    --zlib-compat) compat=1; shift ;;
    --with-gzfileops) gzfileops=1; shift ;;
    --cover) cover=1; shift ;;
    -3* | --32) build32=1; shift ;;
    -6* | --64) build64=1; shift ;;
    --without-acle) buildacle=0; shift ;;
    --without-neon) buildneon=0; shift ;;
    --with-dfltcc-deflate) builddfltccdeflate=1; shift ;;
    --with-dfltcc-inflate) builddfltccinflate=1; shift ;;
    --force-sse2) forcesse2=1; shift ;;
    -n | --native) native=1; shift ;;
    -a*=* | --archs=*) ARCHS=`echo $1 | sed 's/.*=//'`; shift ;;
    --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
    --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
    -noopt | --without-optimizations) without_optimizations=1; shift;;
    -oldstrat | --without-new-strategies) without_new_strategies=1; shift;;
    -w* | --warn) warn=1; shift ;;
    -d* | --debug) debug=1; shift ;;
    --with-sanitizers) with_sanitizers=1; shift ;;
    --with-msan) with_msan=1; shift ;;
    --with-fuzzers) with_fuzzers=1; shift ;;

    *)
      echo "unknown option: $1" | tee -a configure.log
      echo "$0 --help for help" | tee -a configure.log
      leave 1;;
    esac
done

# temporary file name
test=ztest$$

# put arguments in log, also put test file in log if used in arguments
show()
{
  case "$*" in
    *$test.c*)
      echo === $test.c === >> configure.log
      cat $test.c >> configure.log
      echo === >> configure.log;;
  esac
  echo $* >> configure.log
}

# check for gcc vs. cc and set compile and link flags based on the system identified by uname
cat > $test.c <<EOF
extern int getchar();
int main() {return getchar();}
EOF

cc=${CC-${CROSS_PREFIX}gcc}
echo -n "Checking for compiler... " | tee -a configure.log
case "$cc" in
  *gcc*) gcc=1 ;;
  *clang*) gcc=1 ;;
esac
case `$cc -v 2>&1` in
  *gcc*) gcc=1 ;;
  *clang*) gcc=1 ;;
esac

if test $build32 -eq 1; then
  CFLAGS="${CFLAGS} -m32"
  SFLAGS="${SFLAGS} -m32"
  LDFLAGS="${LDFLAGS} -m32"
fi
if test $build64 -eq 1; then
  CFLAGS="${CFLAGS} -m64"
  SFLAGS="${SFLAGS} -m64"
  LDFLAGS="${LDFLAGS} -m64"
fi

# Set library name depending on zlib-compat option
if test $compat -eq 0; then
  LIBNAME=libz-ng
  LIBNAME2=zlib-ng
  SUFFIX=-ng
else
  LIBNAME=libz
  LIBNAME2=zlib
  SUFFIX=""
fi

STATICLIB=${LIBNAME}.a
MAPNAME=${LIBNAME2}.map

# extract zlib version numbers from zlib.h
if test $compat -eq 0; then
  VER=`sed -n -e '/ZLIBNG_VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}/zlib-ng.h`
  VER3=`sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < ${SRCDIR}/zlib-ng.h`
  VER2=`sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < ${SRCDIR}/zlib-ng.h`
  VER1=`sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < ${SRCDIR}/zlib-ng.h`
else
  VER=`sed -n -e '/ZLIB_VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}/zlib.h`
  VER3=`sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\\.[0-9]*\\.[0-9]*\).*/\1/p' < ${SRCDIR}/zlib.h`
  VER2=`sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < ${SRCDIR}/zlib.h`
  VER1=`sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < ${SRCDIR}/zlib.h`
fi

show $cc -c $test.c
if test "$gcc" -eq 1 && ($cc $CFLAGS -c $test.c) >> configure.log 2>&1; then
  echo "$cc" | tee -a configure.log
  CC="$cc"
  CFLAGS="${CFLAGS} -std=c99"

  # Re-check ARCH if the compiler is a cross-compiler.
  if $CC -print-multiarch 1> /dev/null 2>&1 && test -n "$($CC -print-multiarch)" 1> /dev/null 2>&1; then
      CC_ARCH=`$CC $CFLAGS -print-multiarch | sed 's/-.*//g'`
  else
      CC_ARCH=`$CC $CFLAGS -dumpmachine | sed 's/-.*//g'`
  fi
  case $CC_ARCH in
    i386 | i486 | i586 | i686)
      # Honor user choice if gcc is multilib and 64-bit is requested
      if test $build64 -eq 1; then
        ARCH=x86_64
      else
        ARCH=$CC_ARCH
      fi ;;
    x86_64)
      # Honor user choice if gcc is multilib and 32-bit is requested
      if test $build32 -ne 1; then
        ARCH=$CC_ARCH
      fi ;;
    arm | armeb)
      if test $native -eq 0; then
        ARCH=arm
      else
        ARCH=native
      fi
      if test "${uname}" = "eabi"; then
        # No ACLE support
        uname=arm
        if test $buildacle -eq 1; then
          echo ACLE support not available
          buildacle=0
        fi
      fi
      if test $buildacle -eq 1; then
        if test $native -eq 0; then
          ARCH=armv8-a+crc
        fi
      fi ;;
    armv8l)
      if test $native -eq 0; then
        ARCH=armv8-a
      else
        ARCH=native
      fi ;;
    aarch64 | aarch64_be)
      if test "${uname}" = "elf"; then
        uname=aarch64
      fi
      if test $native -eq 0; then
        ARCH=aarch64
      else
        ARCH=native
      fi ;;
  esac
  CFLAGS="-O2 ${CFLAGS}"
  if test -n "${ARCHS}"; then
    CFLAGS="${CFLAGS} ${ARCHS}"
    LDFLAGS="${LDFLAGS} ${ARCHS}"
  fi
  CFLAGS="${CFLAGS} -Wall"
  SFLAGS="${CFLAGS} -fPIC"
  if test $native -eq 1; then
    CFLAGS="${CFLAGS} -march=native"
    SFLAGS="${SFLAGS} -march=native"
  fi
  if test "$warn" -eq 1; then
    CFLAGS="${CFLAGS} -Wextra -Wpedantic -Wno-implicit-fallthrough"
  fi
  if test $debug -eq 1; then
    CFLAGS="${CFLAGS} -DZLIB_DEBUG"
    SFLAGS="${SFLAGS} -DZLIB_DEBUG"
  fi
  if test -z "$uname"; then
    uname=`(uname -s || echo unknown) 2>/dev/null`
  fi
  case "$uname" in
  Linux* | linux* | GNU | GNU/* | solaris*)
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.1,--version-script,${SRCDIR}/${MAPNAME}" ;;
  *BSD | *bsd* | DragonFly)
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.1,--version-script,${SRCDIR}/${MAPNAME}"
        LDCONFIG="ldconfig -m" ;;
  CYGWIN* | Cygwin* | cygwin*)
        ARFLAGS="rcs"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        if test $compat -eq 0; then
          SHAREDLIB=cygz-ng$shared_ext
        else
          SHAREDLIB=cygz$shared_ext
        fi
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib,${IMPORTLIB},--version-script,${SRCDIR}/${MAPNAME}"
        LDSHAREDLIBC=""
        DEFFILE='win32/${LIBNAME2}.def'
        RC="${CROSS_PREFIX}windres"
        RCFLAGS='--define GCC_WINDRES'
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  MSYS* | msys*)
        ARFLAGS="rcs"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        if test $compat -eq 0; then
          SHAREDLIB=msys-z-ng$shared_ext
        else
          SHAREDLIB=msys-z$shared_ext
        fi
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib,${IMPORTLIB}"
        LDSHAREDLIBC=""
        DEFFILE='win32/${LIBNAME2}.def'
        RC="${CROSS_PREFIX}windres"
        RCFLAGS='--define GCC_WINDRES'
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  MINGW* | mingw*)
        ARFLAGS="rcs"
        CFLAGS="${CFLAGS} -D_POSIX_C_SOURCE=200809L -D_GNU_SOURCE=1"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        SHAREDLIB=${LIBNAME}-$VER1$shared_ext
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib=${IMPORTLIB} -Wl,--version-script=${SRCDIR}/${MAPNAME}"
        LDSHAREDLIBC=""
        DEFFILE='win32/${LIBNAME2}.def'
        RC="${CROSS_PREFIX}windres"
        RCFLAGS='--define GCC_WINDRES'
        if [ "$CC" == "mingw32-gcc" ]; then
          case $ARCH in
          i386 | i486 | i586 | i686) RCFLAGS="${RCFLAGS} -F pe-i386";;
          esac;
        fi
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
         # (alain.bonnefoy@icbt.com)
                 LDSHARED=${LDSHARED-"$cc"}
                 LDSHAREDFLAGS="-shared -Wl,-h${LIBNAME}.so.1" ;;
  HP-UX*)
         LDSHARED=${LDSHARED-"$cc"}
         LDSHAREDFLAGS="-shared"
         case `(uname -m || echo unknown) 2>/dev/null` in
         ia64)
                 shared_ext='.so'
                 SHAREDLIB='${LIBNAME}.so' ;;
         *)
                 shared_ext='.sl'
                 SHAREDLIB='${LIBNAME}.sl' ;;
         esac ;;
  Darwin* | darwin*)
             shared_ext='.dylib'
             SHAREDLIB=${LIBNAME}$shared_ext
             SHAREDLIBV=${LIBNAME}.$VER$shared_ext
             SHAREDLIBM=${LIBNAME}.$VER1$shared_ext
             SHAREDTARGET=$SHAREDLIBV
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-dynamiclib -install_name $libdir/$SHAREDLIBM -compatibility_version $VER1 -current_version $VER3"
             if libtool -V 2>&1 | grep Apple > /dev/null; then
                 AR="libtool"
             else
                 AR="/usr/bin/libtool"
             fi
             ARFLAGS="-o" ;;
  aarch64)
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.1 -Wl,--version-script,${SRCDIR}/${MAPNAME}"
             LDSHAREDLIBC="-Wl,--start-group -lc -lrdimon -Wl,--end-group" ;;
  *)
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-shared" ;;
  esac
else
  # find system name and corresponding cc options
  CC=${CC-cc}
  gcc=0
  echo "$CC" | tee -a configure.log
  if test -z "$uname"; then
    uname=`(uname -sr || echo unknown) 2>/dev/null`
  fi
  case "$uname" in
  HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
             CFLAGS=${CFLAGS-"-O"}
             LDSHARED=${LDSHARED-"ld"}
             LDSHAREDFLAGS="-b"
         case `(uname -m || echo unknown) 2>/dev/null` in
         ia64)
             shared_ext='.so'
             SHAREDLIB='${LIBNAME}.so' ;;
         *)
             shared_ext='.sl'
             SHAREDLIB='${LIBNAME}.sl' ;;
         esac ;;
  AIX*)  # Courtesy of dbakker@arrayasolutions.com
             SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
             CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
             LDSHARED=${LDSHARED-"xlc"}
             LDSHAREDFLAGS="-G" ;;
  # send working options for other systems to zlib@gzip.org
  *)         SFLAGS=${CFLAGS-"-O"}
             CFLAGS=${CFLAGS-"-O"}
             LDSHARED=${LDSHARED-"cc"}
             LDSHAREDFLAGS="-shared" ;;
  esac
fi

# destination names for shared library if not defined above
SHAREDLIB=${SHAREDLIB-"${LIBNAME}$shared_ext"}
SHAREDLIBV=${SHAREDLIBV-"${LIBNAME}$shared_ext.$VER"}
SHAREDLIBM=${SHAREDLIBM-"${LIBNAME}$shared_ext.$VER1"}
SHAREDTARGET=${SHAREDTARGET-"${LIBNAME}$shared_ext.$VER"}

echo >> configure.log

# define functions for testing compiler and library characteristics and logging the results

cat > $test.c <<EOF
#error error
EOF
if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
  try()
  {
    show $*
    test "`( $* ) 2>&1 | tee -a configure.log`" = ""
  }
  echo - using any output from compiler to indicate an error >> configure.log
else
try()
{
  show $*
  ( $* ) >> configure.log 2>&1
  ret=$?
  if test $ret -ne 0; then
    echo "(exit code "$ret")" >> configure.log
  fi
  return $ret
}
fi

tryboth()
{
  show $*
  got=`( $* ) 2>&1`
  ret=$?
  printf %s "$got" >> configure.log
  if test $ret -ne 0; then
    return $ret
  fi
  test "$got" = ""
}

cat > $test.c << EOF
int foo() { return 0; }
EOF
echo "Checking for obsessive-compulsive compiler options..." >> configure.log
if try $CC -c $CFLAGS $test.c; then
  :
else
  echo "Compiler error reporting is too harsh for $0 (perhaps remove -Werror)." | tee -a configure.log
  leave 1
fi

echo >> configure.log

if test $with_sanitizers -eq 1; then
    if test $with_msan -eq 1; then
        echo "Error: --with-sanitizers and --with-msan cannot be used together"
        exit 1
    fi
    echo -n "Checking for sanitizers ASan/UBSan... " | tee -a configure.log
    sanitizers=""
    for san in bool address array-bounds float-divide-by-zero function integer-divide-by-zero return shift signed-integer-overflow undefined unsigned-integer-overflow vla-bound vptr; do
        if try $CC -c $CFLAGS $test.c -fsanitize=$san ; then
            if test -n "$sanitizers"; then
                sanitizers="$sanitizers,$san"
            else
                sanitizers="$san"
            fi
        fi
    done

    if test -n "$sanitizers"; then
        echo "-fsanitize=$sanitizers" | tee -a configure.log
        CFLAGS="$CFLAGS -fsanitize=$sanitizers"
        SFLAGS="$SFLAGS -fsanitize=$sanitizers"
        LDFLAGS="$LDFLAGS -fsanitize=$sanitizers"
    else
        echo No | tee -a configure.log
    fi

    echo >> configure.log
fi

if test $with_msan -eq 1; then
    echo -n "Checking for MSan... " | tee -a configure.log
    if try $CC -c $CFLAGS $test.c -fsanitize=memory ; then
        echo "-fsanitize=memory" | tee -a configure.log
        CFLAGS="$CFLAGS -fsanitize=memory"
        SFLAGS="$SFLAGS -fsanitize=memory"
        LDFLAGS="$LDFLAGS -fsanitize=memory"
    else
        echo No | tee -a configure.log
    fi

    echo >> configure.log
fi

# see if shared library build supported
cat > $test.c <<EOF
extern int getchar();
int hello() {return getchar();}
EOF
if test $shared -eq 1; then
  echo -n "Checking for shared library support... " | tee -a configure.log
  # we must test in two steps (cc then ld), required at least on SunOS 4.x
  if try $CC -w -c $SFLAGS $test.c &&
     try $LDSHARED $LDSHAREDFLAGS $LDFLAGS -o $test$shared_ext $test.o $LDSHAREDLIBC; then
    echo "Building shared library $SHAREDTARGET with $CC." | tee -a configure.log
  elif test -z "$old_cc" -a -z "$old_cflags"; then
    echo "No shared library support." | tee -a configure.log
    shared=0;
  else
    echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
    shared=0;
  fi
fi
if test $shared -eq 0; then
  LDSHARED="$CC"
  LDSHAREDFLAGS=""
  ALL="static"
  SHAREDLIB=""
  SHAREDLIBV=""
  SHAREDLIBM=""
  SHAREDTARGET=""
  INSTALLTARGETS=install-static
  UNINSTALLTARGETS=uninstall-static
  echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
else
  ALL="static shared"
  TEST="${TEST} testshared"
fi

echo >> configure.log

# check for large file support, and if none, check for fseeko()
cat > $test.c <<EOF
#include <sys/types.h>
off64_t dummy = 0;
EOF
if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
  CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
  SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
  ALL="${ALL} all64"
  TEST="${TEST} test64"
  echo "Checking for off64_t... Yes." | tee -a configure.log
  echo "Checking for fseeko... Yes." | tee -a configure.log
else
  echo "Checking for off64_t... No." | tee -a configure.log
  echo >> configure.log
  cat > $test.c <<EOF
#include <sys/types.h>
int main() {
  _off64_t dummy = 0;
  return 0;
}
EOF
  if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
    echo "Checking for _off64_t... Yes." | tee -a configure.log
    ALL="${ALL} all64"
    TEST="${TEST} test64"
  else
    echo "Checking for _off64_t... No." | tee -a configure.log
  fi
  echo >> configure.log
  cat > $test.c <<EOF
#include <stdio.h>
int main(void) {
  fseeko(NULL, 0, 0);
  return 0;
}
EOF
  if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
    echo "Checking for fseeko... Yes." | tee -a configure.log
  else
    CFLAGS="${CFLAGS} -DNO_FSEEKO"
    SFLAGS="${SFLAGS} -DNO_FSEEKO"
    echo "Checking for fseeko... No." | tee -a configure.log
  fi
fi

echo >> configure.log

# check for strerror() for use by gz* functions
cat > $test.c <<EOF
#include <string.h>
#include <errno.h>
int main() { return strlen(strerror(errno)); }
EOF
if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
  echo "Checking for strerror... Yes." | tee -a configure.log
else
  CFLAGS="${CFLAGS} -DNO_STRERROR"
  SFLAGS="${SFLAGS} -DNO_STRERROR"
  echo "Checking for strerror... No." | tee -a configure.log
fi

# We need to remove zconf.h from source directory if building outside of it
if [ "$SRCDIR" != "$BUILDDIR" ]; then
    rm -f $SRCDIR/zconf${SUFFIX}.h
fi

# copy clean zconf.h for subsequent edits
cp -p $SRCDIR/zconf${SUFFIX}.h.in zconf${SUFFIX}.h

echo >> configure.log

# check for unistd.h and save result in zconf.h
cat > $test.c <<EOF
#include <unistd.h>
int main() { return 0; }
EOF
if try $CC -c $CFLAGS $test.c; then
  sed < zconf${SUFFIX}.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf${SUFFIX}.temp.h
  mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
  echo "Checking for unistd.h... Yes." | tee -a configure.log
else
  echo "Checking for unistd.h... No." | tee -a configure.log
fi

echo >> configure.log

# check for ptrdiff_t and save result in zconf.h
echo -n "Checking for ptrdiff_t... " | tee -a configure.log
cat > $test.c <<EOF
#include <stddef.h>
int fun(ptrdiff_t *a) { (void)a; return 0; }
EOF
if try $CC -c $CFLAGS $test.c; then
  echo "Yes." | tee -a configure.log
else
    echo "No." | tee -a configure.log
    sed < zconf${SUFFIX}.h "/^#ifdef NEED_PTRDIFF_T.* may be/s/def NEED_PTRDIFF_T\(.*\) may be/ 1\1 was/" > zconf${SUFFIX}.temp.h
    mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h

    echo -n "Checking for sizeof(void *)... " | tee -a configure.log
    cat > $test.c <<EOF
#include <stdint.h>
#define COMPILE_TIME_ASSERT(pred) struct s { int x: (pred) ? 1 : -1; }
COMPILE_TIME_ASSERT(sizeof(int32_t) == sizeof(void *));
EOF
    if try $CC -c $CFLAGS $test.c; then
        echo "sizeof(int32_t)." | tee -a configure.log
        sed < zconf${SUFFIX}.h "s/^typedef PTRDIFF_TYPE ptrdiff_t;/typedef int32_t ptrdiff_t;/g" > zconf${SUFFIX}.temp.h
        mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
    else
        cat > $test.c <<EOF
#include <stdint.h>
#define COMPILE_TIME_ASSERT(pred) struct s { int x: (pred) ? 1 : -1; }
COMPILE_TIME_ASSERT(sizeof(int64_t) == sizeof(void *));
EOF
        if try $CC -c $CFLAGS $test.c; then
            echo "sizeof(int64_t)." | tee -a configure.log
            sed < zconf${SUFFIX}.h "s/^typedef PTRDIFF_TYPE ptrdiff_t;/typedef int64_t ptrdiff_t;/g" > zconf${SUFFIX}.temp.h
            mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
        else
            echo "unknown." | tee -a configure.log
            exit 1
        fi
    fi
fi

# if --zlib-compat was requested
if test $compat -eq 1; then
  gzfileops=1
  CFLAGS="${CFLAGS} -DZLIB_COMPAT"
  SFLAGS="${SFLAGS} -DZLIB_COMPAT"
  case "$uname" in
  CYGWIN* | Cygwin* | cygwin* | MSYS* | msys* | MINGW* | mingw*)
    DEFFILE="win32/zlibcompat.def" ;;
  esac
fi

# if --gzfileops was requested
if test $gzfileops -eq 1; then
  CFLAGS="${CFLAGS} -DWITH_GZFILEOP"
  SFLAGS="${SFLAGS} -DWITH_GZFILEOP"
  OBJC="${OBJC} \$(OBJG)"
  PIC_OBJC="${PIC_OBJC} \$(PIC_OBJG)"
fi

# if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
if test $cover -eq 1; then
  CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
  LDFLAGS="${LDFLAGS} -fprofile-arcs -ftest-coverage"
  if test -n "$GCC_CLASSIC"; then
    CC=$GCC_CLASSIC
  fi
fi

echo >> configure.log

# Check for ANSI C compliant compiler
cat > $test.c <<EOF
#include <stdio.h>
#include <stdarg.h>
#include "zconf${SUFFIX}.h"
int main() {
#ifdef STDC
  return 0;
#endif
  return 1;
}
EOF
if try $CC -c $CFLAGS $test.c; then
  echo "Checking for ANSI C compliant compiler...  Yes." | tee -a configure.log
  :
else
  echo "Checking for ANSI C compliant compiler...  No." | tee -a configure.log
  echo "Error: ANSI C compatible compiler needed, cannot continue." | tee -a configure.log
  leave 1
fi

# see if we can hide zlib internal symbols that are linked between separate source files using hidden
if test "$gcc" -eq 1; then
  echo >> configure.log
  cat > $test.c <<EOF
#define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
int ZLIB_INTERNAL foo;
int main() { return 0; }
EOF
  if tryboth $CC -c $CFLAGS $test.c; then
    CFLAGS="$CFLAGS -DHAVE_VISIBILITY_HIDDEN"
    SFLAGS="$SFLAGS -DHAVE_VISIBILITY_HIDDEN"
    echo >> configure.log
    echo "Checking for attribute(visibility(hidden)) support... Yes." | tee -a configure.log
  else
    echo >> configure.log
    echo "Checking for attribute(visibility(hidden)) support... No." | tee -a configure.log
  fi
fi

# see if we can hide zlib internal symbols that are linked between separate source files using internal
if test "$gcc" -eq 1; then
  echo >> configure.log
  cat > $test.c <<EOF
#define ZLIB_INTERNAL __attribute__((visibility ("internal")))
int ZLIB_INTERNAL foo;
int main() { return 0; }
EOF
  if tryboth $CC -c $CFLAGS $test.c; then
    CFLAGS="$CFLAGS -DHAVE_VISIBILITY_INTERNAL"
    SFLAGS="$SFLAGS -DHAVE_VISIBILITY_INTERNAL"
    echo >> configure.log
    echo "Checking for attribute(visibility(internal)) support... Yes." | tee -a configure.log
  else
    echo >> configure.log
    echo "Checking for attribute(visibility(internal)) support... No." | tee -a configure.log
  fi
fi

# Check for __builtin_ctzl() support in compiler
cat > $test.c << EOF
int main(void) {
    unsigned int zero = 0;
    long test = __builtin_ctzl(zero);
    (void)test;
    return 0;
}
EOF
if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
    echo "Checking for __builtin_ctzl ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_BUILTIN_CTZL"
    SFLAGS="$SFLAGS -DHAVE_BUILTIN_CTZL"
else
    echo "Checking for __builtin_ctzl ... No." | tee -a configure.log
fi

# Check for SSE2 intrinsics
case "${ARCH}" in
    i386 | i486 | i586 | i686)
        cat > $test.c << EOF
#include <immintrin.h>
int main(void) {
    __m128i zero = _mm_setzero_si128();
    (void)zero;
    return 0;
}
EOF
        if try ${CC} ${CFLAGS} ${sse2flag} $test.c; then
            echo "Checking for SSE2 intrinsics ... Yes." | tee -a configure.log
            HAVE_SSE2_INTRIN=1
        else
            echo "Checking for SSE2 intrinsics ... No." | tee -a configure.log
            HAVE_SSE2_INTRIN=0
        fi
        ;;
esac

# Check for SSE4.2 CRC intrinsics
case "${ARCH}" in
    i386 | i486 | i586 | i686 | x86_64)
        cat > $test.c << EOF
int main(void) {
    unsigned crc = 0;
    char c = 'c';
    crc = __builtin_ia32_crc32qi(crc, c);
    (void)crc;
    return 0;
}
EOF
        if try ${CC} ${CFLAGS} ${sse42flag} $test.c; then
            echo "Checking for SSE4.2 CRC intrinsics ... Yes." | tee -a configure.log
            HAVE_SSE42CRC_INTRIN=1
        else
            echo "Checking for SSE4.2 CRC intrinsics ... No." | tee -a configure.log
            HAVE_SSE42CRC_INTRIN=0
        fi
        ;;
esac

# Check for PCLMULQDQ intrinsics
case "${ARCH}" in
    i386 | i486 | i586 | i686 | x86_64)
        cat > $test.c << EOF
#include <immintrin.h>
#include <wmmintrin.h>
int main(void) {
    __m128i a = _mm_setzero_si128();
    __m128i b = _mm_setzero_si128();
    __m128i c = _mm_clmulepi64_si128(a, b, 0x10);
    (void)c;
    return 0;
}
EOF
        if try ${CC} ${CFLAGS} ${pclmulflag} $test.c; then
            echo "Checking for PCLMULQDQ intrinsics ... Yes." | tee -a configure.log
            HAVE_PCLMULQDQ_INTRIN=1
        else
            echo "Checking for PCLMULQDQ intrinsics ... No." | tee -a configure.log
            HAVE_PCLMULQDQ_INTRIN=0
        fi

        # Enable deflate_medium at level 4-6
        if test $without_new_strategies -eq 1; then
            CFLAGS="${CFLAGS} -DNO_MEDIUM_STRATEGY"
            SFLAGS="${SFLAGS} -DNO_MEDIUM_STRATEGY"
        fi
        ;;
esac

# Check for AVX2 intrinsics
case "${ARCH}" in
    i386 | i486 | i586 | i686 | x86_64)
        cat > $test.c << EOF
#include <immintrin.h>
int main(void) {
    __m256i x = _mm256_set1_epi16(2);
    const __m256i y = _mm256_set1_epi16(1);
    x = _mm256_subs_epu16(x, y);
    (void)x;
    return 0;
}
EOF
        if try ${CC} ${CFLAGS} ${avx2flag} $test.c; then
            echo "Checking for AVX2 intrinsics ... Yes." | tee -a configure.log
            HAVE_AVX2_INTRIN=1
        else
            echo "Checking for AVX2 intrinsics ... No." | tee -a configure.log
            HAVE_AVX2_INTRIN=0
        fi
        ;;
esac


# Check whether -mfpu=neon is available on ARM processors.
case "${ARCH}" in
    arm*)
        cat > $test.c << EOF
int main() { return 0; }
EOF
        if try $CC -c $CFLAGS -mfpu=neon $test.c; then
            MFPU_NEON_AVAILABLE=1
            echo "Check whether -mfpu=neon is available ... Yes." | tee -a configure.log
        else
            MFPU_NEON_AVAILABLE=0
            echo "Check whether -mfpu=neon is available ... No." | tee -a configure.log
        fi
        ;;
esac

# Check whether sys/sdt.h is available
cat > $test.c << EOF
#include <sys/sdt.h>
int main() { return 0; }
EOF
if try ${CC} ${CFLAGS} $test.c; then
    echo "Checking for sys/sdt.h ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_SYS_SDT_H"
    SFLAGS="$SFLAGS -DHAVE_SYS_SDT_H"
else
    echo "Checking for sys/sdt.h ... No." | tee -a configure.log
fi

ARCHDIR='arch/generic'
ARCH_STATIC_OBJS=''
ARCH_SHARED_OBJS=''

# Set ARCH specific FLAGS
case "${ARCH}" in
    # x86 specific optimizations
    i386 | i486 | i586 | i686)
        ARCHDIR=arch/x86

        CFLAGS="${CFLAGS} -DUNALIGNED_OK"
        SFLAGS="${SFLAGS} -DUNALIGNED_OK"

        # Enable arch-specific optimizations?
        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DX86_CPUID"
            SFLAGS="${SFLAGS} -DX86_CPUID"

            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} x86.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} x86.lo"

            if test ${HAVE_SSE2_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSE2"
                SFLAGS="${SFLAGS} -DX86_SSE2"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} fill_window_sse.o slide_sse.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} fill_window_sse.lo slide_sse.lo"

                if test $forcesse2 -eq 1; then
                    CFLAGS="${CFLAGS} -DX86_NOCHECK_SSE2"
                    SFLAGS="${SFLAGS} -DX86_NOCHECK_SSE2"
                fi

                # Enable deflate_quick at level 1?
                # requires SSE2: code uses fill_window_sse
                if test $without_new_strategies -eq 0; then
                    CFLAGS="${CFLAGS} -DX86_QUICK_STRATEGY"
                    SFLAGS="${SFLAGS} -DX86_QUICK_STRATEGY"

                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} deflate_quick.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} deflate_quick.lo"
                fi
            fi

            if test ${HAVE_SSE42CRC_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSE42_CRC_INTRIN"
                SFLAGS="${SFLAGS} -DX86_SSE42_CRC_INTRIN"
            fi

            if test ${HAVE_AVX2_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_AVX2"
                SFLAGS="${SFLAGS} -DX86_AVX2"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} slide_avx.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} slide_avx.lo"
            fi

            CFLAGS="${CFLAGS} -DX86_SSE42_CRC_HASH"
            SFLAGS="${SFLAGS} -DX86_SSE42_CRC_HASH"
            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} insert_string_sse.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} insert_string_sse.lo"

            if test ${HAVE_PCLMULQDQ_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_PCLMULQDQ_CRC"
                SFLAGS="${SFLAGS} -DX86_PCLMULQDQ_CRC"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc_folding.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc_folding.lo"
            fi

        fi
    ;;

    # x86_64 specific optimizations
    x86_64)
        ARCHDIR=arch/x86

        CFLAGS="${CFLAGS} -DUNALIGNED_OK"
        SFLAGS="${SFLAGS} -DUNALIGNED_OK"

        # Enable arch-specific optimizations?
        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DX86_CPUID -DX86_SSE2 -DX86_SSE42_CRC_HASH"
            SFLAGS="${SFLAGS} -DX86_CPUID -DX86_SSE2 -DX86_SSE42_CRC_HASH"

            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} x86.o fill_window_sse.o insert_string_sse.o slide_sse.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} x86.lo fill_window_sse.lo insert_string_sse.lo slide_sse.lo"

            if test ${HAVE_SSE42CRC_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSE42_CRC_INTRIN"
                SFLAGS="${SFLAGS} -DX86_SSE42_CRC_INTRIN"
            fi

            if test ${HAVE_PCLMULQDQ_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_PCLMULQDQ_CRC"
                SFLAGS="${SFLAGS} -DX86_PCLMULQDQ_CRC"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc_folding.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc_folding.lo"
            fi

            if test ${HAVE_AVX2_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_AVX2"
                SFLAGS="${SFLAGS} -DX86_AVX2"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} slide_avx.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} slide_avx.lo"
            fi

            # Enable deflate_quick at level 1?
            if test $without_new_strategies -eq 0; then
                CFLAGS="${CFLAGS} -DX86_QUICK_STRATEGY"
                SFLAGS="${SFLAGS} -DX86_QUICK_STRATEGY"

                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} deflate_quick.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} deflate_quick.lo"
            fi
        fi
    ;;

    # ARM specific optimizations
    arm*)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=arm
        ARCHDIR=arch/arm

        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DARM_GETAUXVAL"
            SFLAGS="${SFLAGS} -DARM_GETAUXVAL"
            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} armfeature.o fill_window_arm.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} armfeature.lo fill_window_arm.lo"
        fi


        GCC_MACHINE=$(${CC} -dumpmachine)
        case "${GCC_MACHINE}" in
            *gnueabihf)
                floatabi="-mfloat-abi=hard" ;;
            *gnueabi)
                floatabi="-mfloat-abi=softfp" ;;
        esac
        CFLAGS="${CFLAGS} ${floatabi}"
        SFLAGS="${SFLAGS} ${floatabi}"

        case "${ARCH}" in
            armv[345]*)
                if test $without_optimizations -eq 0; then
                    if test $buildacle -eq 1; then
                        echo ACLE support not available
                    fi

                    if test $buildneon -eq 1; then
                        echo NEON support not available
                    fi
                fi
            ;;
            armv6l | armv6hl)
                CFLAGS="${CFLAGS} -DUNALIGNED_OK"
                SFLAGS="${SFLAGS} -DUNALIGNED_OK"

                if test $without_optimizations -eq 0; then
                    if test $buildacle -eq 1; then
                        echo ACLE support not available
                    fi

                    if test $buildneon -eq 1; then
                        echo NEON support not available
                    fi
                fi
            ;;
            arm | armv7*)
                CFLAGS="${CFLAGS} -DUNALIGNED_OK"
                SFLAGS="${SFLAGS} -DUNALIGNED_OK"

                if test $without_optimizations -eq 0; then
                    if test $buildacle -eq 1; then
                        echo ACLE support not available
                    fi

                    if test $buildneon -eq 1; then
                        CFLAGS="${CFLAGS} -mfpu=neon -DARM_NEON_ADLER32"
                        SFLAGS="${SFLAGS} -mfpu=neon -DARM_NEON_ADLER32"

                        ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_neon.o"
                        ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_neon.lo"
                    fi
                fi
            ;;
            armv8-a | armv8-a+simd)
                CFLAGS="${CFLAGS} -DUNALIGNED_OK"
                SFLAGS="${SFLAGS} -DUNALIGNED_OK"

                if test $without_optimizations -eq 0; then
                    if test $buildacle -eq 1; then
                        echo ACLE support not available
                    fi

                    if test $buildneon -eq 1; then
                        if test $MFPU_NEON_AVAILABLE -eq 1;then
                            CFLAGS="${CFLAGS} -mfpu=neon"
                            SFLAGS="${SFLAGS} -mfpu=neon"
                        fi

                        CFLAGS="${CFLAGS} -DARM_NEON_ADLER32"
                        SFLAGS="${SFLAGS} -DARM_NEON_ADLER32"

                        ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_neon.o"
                        ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_neon.lo"
                    fi
                fi
            ;;
            armv8-a+crc | armv8-a+crc+simd | armv8.[1234]-a | armv8.[1234]-a+simd)
                CFLAGS="-march=${ARCH} ${CFLAGS} -DUNALIGNED_OK"
                SFLAGS="-march=${ARCH} ${SFLAGS} -DUNALIGNED_OK"

                if test $without_optimizations -eq 0; then
                    CFLAGS="${CFLAGS} -DARM_ACLE_CRC_HASH"
                    SFLAGS="${SFLAGS} -DARM_ACLE_CRC_HASH"
                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_acle.o insert_string_acle.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_acle.lo insert_string_acle.lo"

                    if test $buildneon -eq 1; then
                        if test $MFPU_NEON_AVAILABLE -eq 1;then
                            CFLAGS="${CFLAGS} -mfpu=neon"
                            SFLAGS="${SFLAGS} -mfpu=neon"
                        fi

                        CFLAGS="${CFLAGS} -DARM_NEON_ADLER32"
                        SFLAGS="${SFLAGS} -DARM_NEON_ADLER32"

                        ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_neon.o"
                        ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_neon.lo"
                    fi
                fi
            ;;
        esac

    ;;
    # 64-bit ARM specific optimizations
    aarch64)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=aarch64
        ARCHDIR=arch/arm

        if test $native -eq 0; then
            ARCH="armv8-a"
        else
            ARCH="native"
        fi

        CFLAGS="-march=${ARCH} ${CFLAGS} -DUNALIGNED_OK"
        SFLAGS="-march=${ARCH} ${SFLAGS} -DUNALIGNED_OK"

        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DARM_GETAUXVAL"
            SFLAGS="${SFLAGS} -DARM_GETAUXVAL"
            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} armfeature.o fill_window_arm.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} armfeature.lo fill_window_arm.lo"

            if test $buildacle -eq 1; then
                if test $native -eq 0; then
                    ARCH="${ARCH}+crc"
                fi
                CFLAGS="${CFLAGS} -DARM_ACLE_CRC_HASH"
                SFLAGS="${SFLAGS} -DARM_ACLE_CRC_HASH"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_acle.o insert_string_acle.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_acle.lo insert_string_acle.lo"
            fi

            if test $buildneon -eq 1; then
                if test $native -eq 0; then
                    ARCH="${ARCH}+simd"
                fi
                CFLAGS="${CFLAGS} -DARM_NEON_ADLER32"
                SFLAGS="${SFLAGS} -DARM_NEON_ADLER32"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_neon.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_neon.lo"
            fi
        fi
    ;;
    powerpc)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=ppc
    ;;
    powerpc64)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=ppc64
    ;;
    s390x)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=s390x
        ARCHDIR=arch/s390

        if test $without_optimizations -eq 0; then
            if test $builddfltccdeflate -eq 1 -o $builddfltccinflate -eq 1; then
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} dfltcc_common.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} dfltcc_common.lo"
            fi

            if test $builddfltccdeflate -eq 1; then
                CFLAGS="${CFLAGS} -DS390_DFLTCC_DEFLATE"
                SFLAGS="${SFLAGS} -DS390_DFLTCC_DEFLATE"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} dfltcc_deflate.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} dfltcc_deflate.lo"
                ARCH="${ARCH}+dfltcc-deflate"
            fi

            if test $builddfltccinflate -eq 1; then
                CFLAGS="${CFLAGS} -DS390_DFLTCC_INFLATE"
                SFLAGS="${SFLAGS} -DS390_DFLTCC_INFLATE"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} dfltcc_inflate.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} dfltcc_inflate.lo"
                ARCH="${ARCH}+dfltcc-inflate"
            fi
        fi
    ;;
    *)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=$ARCH
    ;;
esac

echo "ARCH: ${ARCH}"
echo "Using arch directory: ${ARCHDIR}"

# show the results in the log
echo >> configure.log
echo ALL = $ALL >> configure.log
echo AR = $AR >> configure.log
echo ARFLAGS = $ARFLAGS >> configure.log
echo CC = $CC >> configure.log
echo CFLAGS = $CFLAGS >> configure.log
echo EXE = $EXE >> configure.log
echo LDCONFIG = $LDCONFIG >> configure.log
echo LDFLAGS = $LDFLAGS >> configure.log
echo LDSHARED = $LDSHARED >> configure.log
echo LDSHAREDFLAGS = $LDSHAREDFLAGS >> configure.log
echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
echo DEFFILE = $DEFFILE >> configure.log
echo RC = $RC >> configure.log
echo RCFLAGS = $RCFLAGS >> configure.log
echo RCOBJS = $RCOBJS >> configure.log
echo STRIP = $STRIP >> configure.log
echo OBJC = $OBJC >> configure.log
echo PIC_OBJC = $PIC_OBJC >> configure.log
echo RANLIB = $RANLIB >> configure.log
echo SFLAGS = $SFLAGS >> configure.log
echo SHAREDLIB = $SHAREDLIB >> configure.log
echo SHAREDLIBM = $SHAREDLIBM >> configure.log
echo SHAREDLIBV = $SHAREDLIBV >> configure.log
echo SHAREDTARGET = $SHAREDTARGET >> configure.log
echo IMPORTLIB = $IMPORTLIB >> configure.log
echo INSTALLTARGETS = $INSTALLTARGETS >> configure.log
echo UNINSTALLTARGETS = $UNINSTALLTARGETS >> configure.log
echo SRCDIR = $SRCDIR >> configure.log
echo BUILDDIR = $BUILDDIR >> configure.log
echo STATICLIB = $STATICLIB >> configure.log
echo TEST = $TEST >> configure.log
echo VER = $VER >> configure.log
echo exec_prefix = $exec_prefix >> configure.log
echo includedir = $includedir >> configure.log
echo bindir = $bindir >> configure.log
echo libdir = $libdir >> configure.log
echo mandir = $mandir >> configure.log
echo prefix = $prefix >> configure.log
echo sharedlibdir = $sharedlibdir >> configure.log
echo uname = $uname >> configure.log
echo sse2flag = $sse2flag >> configure.log
echo sse4flag = $sse4flag >> configure.log
echo pclmulflag = $pclmulflag >> configure.log
echo ARCHDIR = ${ARCHDIR} >> configure.log
echo ARCH_STATIC_OBJS = ${ARCH_STATIC_OBJS} >> configure.log
echo ARCH_SHARED_OBJS = ${ARCH_SHARED_OBJS} >> configure.log

# Handle sed incompatibilities when using -i
replace_in_file() {
  if [ "$OS" = 'Darwin' ]; then
    sed -i '.tmp' -e "$1" "$2"
  else
    sed -i'.tmp' -e "$1" "$2"
  fi
}

# update Makefile with the configure results

INCLUDES="-I$SRCDIR"
if [ "$SRCDIR" != "$BUILDDIR" ]; then INCLUDES="-I$BUILDDIR ${INCLUDES}"; fi

sed < $SRCDIR/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^WITH_FUZZERS *=/s#=.*#=$with_fuzzers#
/^SFLAGS *=/s#=.*#=$SFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^LDSHARED *=/s#=.*#=$LDSHARED#
/^LDSHAREDFLAGS *=/s#=.*#=$LDSHAREDFLAGS#
/^LIBNAME1 *=/s#=.*#=$LIBNAME#
/^LIBNAME2 *=/s#=.*#=$LIBNAME2#
/^SUFFIX *=/s#=.*#=$SUFFIX#
/^STATICLIB *=/s#=.*#=$STATICLIB#
/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
/^SHAREDTARGET *=/s#=.*#=$SHAREDTARGET#
/^IMPORTLIB *=/s#=.*#=$IMPORTLIB#
/^VER *=/s#=.*#=$VER#
/^VER1 *=/s#=.*#=$VER1#
/^AR *=/s#=.*#=$AR#
/^ARFLAGS *=/s#=.*#=$ARFLAGS#
/^RANLIB *=/s#=.*#=$RANLIB#
/^LDCONFIG *=/s#=.*#=$LDCONFIG#
/^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
/^DEFFILE *=/s#=.*#=$DEFFILE#
/^RC *=/s#=.*#=$RC#
/^RCFLAGS *=/s#=.*#=$RCFLAGS#
/^RCOBJS *=/s#=.*#=$RCOBJS#
/^STRIP *=/s#=.*#=$STRIP#
/^EXE *=/s#=.*#=$EXE#
/^prefix *=/s#=.*#= $prefix#
/^exec_prefix *=/s#=.*#= $exec_prefix#
/^bindir *=/s#=.*#= $bindir#
/^libdir *=/s#=.*#= $libdir#
/^sharedlibdir *=/s#=.*#= $sharedlibdir#
/^includedir *=/s#=.*#= $includedir#
/^mandir *=/s#=.*#= $mandir#
/^SRCDIR *=/s#=.*#=$SRCDIR#
/^INCLUDES *=/s#=.*#=$INCLUDES#
/^OBJC *=/s#=.*#= $OBJC#
/^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
/^all: */s#:.*#: $ALL#
/^install-libs: */s#:.*#: $INSTALLTARGETS#
/^uninstall-libs: */s#:.*#: $UNINSTALLTARGETS#
/^ARCHDIR *=/s#=.*#=$ARCHDIR#
/^ARCH_STATIC_OBJS *=/s#=.*#=$ARCH_STATIC_OBJS#
/^ARCH_SHARED_OBJS *=/s#=.*#=$ARCH_SHARED_OBJS#
" > Makefile

# Append header files dependences.
for file in $(ls -1 $SRCDIR/*.c $SRCDIR/test/*.c $SRCDIR/test/fuzz/*.c $SRCDIR/$ARCHDIR/*.c $SRCDIR/tools/*.c); do
    short_name=$(echo $file | sed -e "s#$SRCDIR/##g")
    incs=$(grep -h include $file | sed -n 's/# *\include *"\(.*\.h\)".*/\1/p' | sort | uniq)
    includes=$(for i in $incs; do
                   # Check that the include file exists in the current dir,
                   # otherwise it may be one of the system include header.
                   if test -e $SRCDIR/$i; then
                       echo -n " \$(SRCDIR)/$i"
                   fi
                   # We also need to check whether the include file is in the ARCHDIR.
                   if test -e $SRCDIR/$ARCHDIR/$i; then
                       echo -n " \$(SRCDIR)/$ARCHDIR/$i"
                   fi
               done)
    obj=$(basename $(echo $file | sed -e 's/\.c/\.o/g' -e 's#^\./##g'))
    lobj=$(basename $(echo $file | sed -e 's/\.c/\.lo/g' -e 's#^\./##g'))

    if grep -q "^$obj:" Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$obj:.*#$obj: \$(SRCDIR)/$short_name $includes#g" Makefile)

        # Special case example64 and minigzip64.
        case "$obj" in
            example.o)
                $(replace_in_file "s#example64.o:.*#example64.o: \$(SRCDIR)/$short_name $includes#g" Makefile)
                ;;
            minigzip.o)
                $(replace_in_file "s#minigzip64.o:.*#minigzip64.o: \$(SRCDIR)/$short_name $includes#g" Makefile)
                ;;
        esac
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$obj: \$(SRCDIR)/$short_name $includes" >> Makefile

        # In case this is one of the ARCHDIR files, append a dependence line
        # that will force the `$(MAKE) -C $(ARCHDIR)` generic rule. Without this
        # we would only execute the copy rule from ARCHDIR to SRCDIR.
        if test -e $SRCDIR/$ARCHDIR/$(basename $file); then
            echo "$ARCHDIR/$obj: \$(SRCDIR)/$short_name $includes" >> Makefile
        fi
    fi

    if grep -q "^$lobj:" Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$lobj:.*#$lobj: \$(SRCDIR)/$short_name $includes#g" Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$lobj: \$(SRCDIR)/$short_name $includes" >> Makefile
    fi
done

# Generate Makefile in arch dir
mkdir -p $ARCHDIR

ARCHINCLUDES="-I$SRCDIR/$ARCHDIR -I$SRCDIR"
if [ "$SRCDIR" != "$BUILDDIR" ]; then ARCHINCLUDES="-I$BUILDDIR ${ARCHINCLUDES}"; fi

sed < $SRCDIR/$ARCHDIR/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^SFLAGS *=/s#=.*#=$SFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^INCLUDES *=/s#=.*#=$ARCHINCLUDES#
/^SUFFIX *=/s#=.*#=$SUFFIX#
/^SRCDIR *=/s#=.*#=$SRCDIR/$ARCHDIR#
/^SRCTOP *=/s#=.*#=$SRCDIR#
/^TOPDIR *=/s#=.*#=$BUILDDIR#
/^AVX2FLAG *=/s#=.*#=$avx2flag#
/^SSE2FLAG *=/s#=.*#=$sse2flag#
/^SSE4FLAG *=/s#=.*#=$sse4flag#
/^PCLMULFLAG *=/s#=.*#=$pclmulflag#
" > $ARCHDIR/Makefile

# Append header files dependences.
for file in $(ls -1 $SRCDIR/$ARCHDIR/*.c); do
    incs=$(grep -h include $file | sed -n 's/# *\include *"\(.*\.h\)".*/\1/p' | sort | uniq)
    includes=$(for i in $incs; do
                   # Check that the include file exists in the current dir,
                   # otherwise it may be one of the system include header.
                   if test -e $SRCDIR/$i; then
                       echo -n " \$(SRCTOP)/$i"
                   fi
                   # We also need to check whether the include file is in the ARCHDIR.
                   if test -e $SRCDIR/$ARCHDIR/$i; then
                       echo -n " \$(SRCDIR)/$i"
                   fi
               done)
    obj=$(basename $(echo $file | sed -e 's/\.c/\.o/g' -e 's#^\./##g'))
    lobj=$(basename $(echo $file | sed -e 's/\.c/\.lo/g' -e 's#^\./##g'))
    short_name=$(basename $file)
    if grep -q "^$obj:" $ARCHDIR/Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$obj:.*#$obj: \$(SRCDIR)/$short_name $includes#g" $ARCHDIR/Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$obj: \$(SRCDIR)/$short_name $includes" >> $ARCHDIR/Makefile
    fi

    if grep -q "^$lobj:" $ARCHDIR/Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$lobj:.*#$lobj: \$(SRCDIR)/$short_name $includes#g" $ARCHDIR/Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$lobj: \$(SRCDIR)/$short_name $includes" >> $ARCHDIR/Makefile
    fi
done

# Generate Makefile in test dir
mkdir -p test
if test $compat -eq 1; then COMPATTESTS="compattests"; fi
if test $QEMU_ARCH; then QEMU_RUN="qemu-$QEMU_ARCH -L /usr/${CHOST}/"; fi
sed < $SRCDIR/test/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^EXE *=/s#=.*#=$EXE#
/^oldtests: */s#:.*#: $TEST#
/^SRCDIR *=/s#=.*#=$SRCDIR/test#
/^SRCTOP *=/s#=.*#=$SRCDIR#
/^COMPATTESTS *=/s#=.*#=$COMPATTESTS#
/^QEMU_RUN *=/s#=.*#=$QEMU_RUN#
/^WITH_FUZZERS *=/s#=.*#=$with_fuzzers#
/^LIBNAME *=/s#=.*#=$LIBNAME#
" > test/Makefile

# create zlib.pc with the configure results
sed < $SRCDIR/zlib.pc.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^LDSHARED *=/s#=.*#=$LDSHARED#
/^LDSHAREDFLAGS *=/s#=.*#=$LDSHAREDFLAGS#
/^STATICLIB *=/s#=.*#=$STATICLIB#
/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
/^IMPORTLIB *=/s#=.*#=$IMPORTLIB#
/^AR *=/s#=.*#=$AR#
/^ARFLAGS *=/s#=.*#=$ARFLAGS#
/^RANLIB *=/s#=.*#=$RANLIB#
/^EXE *=/s#=.*#=$EXE#
/^prefix *=/s#=.*#=$prefix#
/^exec_prefix *=/s#=.*#=$exec_prefix#
/^bindir *=/s#=.*#=$bindir#
/^libdir *=/s#=.*#=$libdir#
/^sharedlibdir *=/s#=.*#=$sharedlibdir#
/^includedir *=/s#=.*#=$includedir#
/^mandir *=/s#=.*#=$mandir#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
" | sed -e "
s/\@VERSION\@/$VER/g;
s/\@SUFFIX\@/$SUFFIX/g;
" > ${LIBNAME2}.pc

# done
leave 0