-# Check if we can build and use 64-bit libraries
-AC_DEFUN(AC_CHECK_64BIT_LIBS,
-[
- BITS_REQ=nochange
- ENABLE_64BIT_LIBS=unknown
- ## revisit this for cross-compile.
-
- AC_ARG_ENABLE(64bit-libs,
- [ --enable-64bit-libs (deprecated, use --with-library-bits) build 64-bit libraries [default= platform default]],
- [echo "note, use --with-library-bits instead of --*-64bit-libs"
- case "${enableval}" in
- no|false|32) with_library_bits=32; ;;
- yes|true|64) with_library_bits=64else32 ;;
- nochange) with_library_bits=nochange; ;;
- *) AC_MSG_ERROR(bad value ${enableval} for '--*-64bit-libs') ;;
- esac] )
-
-
- AC_ARG_WITH(library-bits,
- [ --with-library-bits=bits specify how many bits to use for the library (32, 64, 64else32, nochange) [default=nochange]],
- [case "${withval}" in
- ""|nochange) BITS_REQ=$withval ;;
- 32|64|64else32) BITS_REQ=$withval ;;
- *) AC_MSG_ERROR(bad value ${withval} for --with-library-bits) ;;
- esac])
-
- # don't use these for cross compiling
- if test "$cross_compiling" = "yes" -a "${BITS_REQ}" != "nochange"; then
- AC_MSG_ERROR([Don't specify bitness when cross compiling. See readme.html for help with cross compilation., and set compiler options manually.])
- fi
- AC_CHECK_SIZEOF([void *])
- AC_MSG_CHECKING([whether runnable 64 bit binaries are built by default])
- case $ac_cv_sizeof_void_p in
- 8) DEFAULT_64BIT=yes ;;
- 4) DEFAULT_64BIT=no ;;
- *) DEFAULT_64BIT=unknown
- esac
- BITS_GOT=unknown
-
- # 'OK' here means, we can exit any further checking, everything's copa
- BITS_OK=yes
-
- # do we need to check for buildable/runnable 32 or 64 bit?
- BITS_CHECK_32=no
- BITS_CHECK_64=no
-
- # later, can we run the 32/64 bit binaries so made?
- BITS_RUN_32=no
- BITS_RUN_64=no
-
- if test "$DEFAULT_64BIT" = "yes"; then
- # we get 64 bits by default.
- BITS_GOT=64
- case "$BITS_REQ" in
- 32)
- # need to look for 32 bit support.
- BITS_CHECK_32=yes
- # not copa.
- BITS_OK=no;;
- # everyone else is happy.
- nochange) ;;
- *) ;;
- esac
- elif test "$DEFAULT_64BIT" = "no"; then
- # not 64 bit by default.
- BITS_GOT=32
- case "$BITS_REQ" in
- 64|64else32)
- BITS_CHECK_64=yes
- #BITS_CHECK_32=yes
- BITS_OK=no;;
- nochange) ;;
- *) ;;
- esac
- elif test "$DEFAULT_64BIT" = "unknown"; then
- # cross compiling.
- BITS_GOT=unknown
- case "$BITS_REQ" in
- 64|64else32) BITS_OK=no
- BITS_CHECK_32=yes
- BITS_CHECK_64=yes ;;
- 32) BITS_OK=no;;
- nochange) ;;
- *) ;;
- esac
- fi
-
- AC_MSG_RESULT($DEFAULT_64BIT);
-
- if test "$BITS_OK" != "yes"; then
- # not copa. back these up.
- CFLAGS_OLD="${CFLAGS}"
- CXXFLAGS_OLD="${CXXFLAGS}"
- LDFLAGS_OLD="${LDFLAGS}"
- ARFLAGS_OLD="${ARFLAGS}"
-
- CFLAGS_32="${CFLAGS}"
- CXXFLAGS_32="${CXXFLAGS}"
- LDFLAGS_32="${LDFLAGS}"
- ARFLAGS_32="${ARFLAGS}"
-
- CFLAGS_64="${CFLAGS}"
- CXXFLAGS_64="${CXXFLAGS}"
- LDFLAGS_64="${LDFLAGS}"
- ARFLAGS_64="${ARFLAGS}"
-
- CAN_BUILD_64=unknown
- CAN_BUILD_32=unknown
- # These results can't be cached because is sets compiler flags.
- if test "$BITS_CHECK_64" = "yes"; then
- AC_MSG_CHECKING([how to build 64-bit executables])
- CAN_BUILD_64=no
- ####
- # Find out if we think we can *build* for 64 bit. Doesn't check whether we can run it.
- # Note, we don't have to actually check if the options work- we'll try them before using them.
- # So, only try actually testing the options, if you are trying to decide between multiple options.
- # On exit from the following clauses:
- # if CAN_BUILD_64=yes:
- # *FLAGS are assumed to contain the right settings for 64bit
- # else if CAN_BUILD_64=no: (default)
- # *FLAGS are assumed to be trashed, and will be reset from *FLAGS_OLD
-
- if test "$GCC" = yes; then
- CFLAGS="${CFLAGS} -m64"
- CXXFLAGS="${CXXFLAGS} -m64"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no)
- else
- case "${host}" in
- sparc*-*-solaris*)
- # 1. try -m64
- CFLAGS="${CFLAGS} -m64"
- CXXFLAGS="${CXXFLAGS} -m64"
- AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
- if test "$CAN_BUILD_64" != yes; then
- # Nope. back out changes.
- CFLAGS="${CFLAGS_OLD}"
- CXXFLAGS="${CFLAGS_OLD}"
- # 2. try xarch=v9 [deprecated]
- ## TODO: cross compile: the following won't work.
- SPARCV9=`isainfo -n 2>&1 | grep sparcv9`
- SOL64=`$CXX -xarch=v9 2>&1 && $CC -xarch=v9 2>&1 | grep -v usage:`
- # "Warning: -xarch=v9 is deprecated, use -m64 to create 64-bit programs"
- if test -z "$SOL64" && test -n "$SPARCV9"; then
- CFLAGS="${CFLAGS} -xtarget=ultra -xarch=v9"
- CXXFLAGS="${CXXFLAGS} -xtarget=ultra -xarch=v9"
- LDFLAGS="${LDFLAGS} -xtarget=ultra -xarch=v9"
- CAN_BUILD_64=yes
- fi
- fi
- ;;
- i386-*-solaris*)
- # 1. try -m64
- CFLAGS="${CFLAGS} -m64"
- CXXFLAGS="${CXXFLAGS} -m64"
- AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
- if test "$CAN_BUILD_64" != yes; then
- # Nope. back out changes.
- CFLAGS="${CFLAGS_OLD}"
- CXXFLAGS="${CXXFLAGS_OLD}"
- # 2. try the older compiler option
- ## TODO: cross compile problem
- AMD64=`isainfo -n 2>&1 | grep amd64`
- SOL64=`$CXX -xtarget=generic64 2>&1 && $CC -xtarget=generic64 2>&1 | grep -v usage:`
- if test -z "$SOL64" && test -n "$AMD64"; then
- CFLAGS="${CFLAGS} -xtarget=generic64"
- CXXFLAGS="${CXXFLAGS} -xtarget=generic64"
- CAN_BUILD_64=yes
- fi
- fi
- ;;
- ia64-*-linux*)
- # check for ecc/ecpc compiler support
- ## TODO: cross compiler problem
- if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 | grep -v Intel`"; then
- if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 | grep -v Itanium`"; then
- CAN_BUILD_64=yes
- fi
- fi
- ;;
- *-*-cygwin)
- # vcvarsamd64.bat should have been used to enable 64-bit builds.
- # We only do this check to display the correct answer.
- ## TODO: cross compiler problem
- if test -n "`$CXX -help 2>&1 | grep 'for x64'`"; then
- CAN_BUILD_64=yes
- fi
- ;;
- *-*-aix*|powerpc64-*-linux*)
- CFLAGS="${CFLAGS} -q64"
- CXXFLAGS="${CXXFLAGS} -q64"
- LDFLAGS="${LDFLAGS} -q64"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no)
- if test "$CAN_BUILD_64" = yes; then
- # worked- set other options.
- case "${host}" in
- *-*-aix*)
- # tell AIX what executable mode to use.
- ARFLAGS="${ARFLAGS} -X64"
- esac
- fi
- ;;
- *-*-hpux*)
- # First we try the newer +DD64, if that doesn't work,
- # try other options.
-
- CFLAGS="${CFLAGS} +DD64"
- CXXFLAGS="${CXXFLAGS} +DD64"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no)
- if test "$CAN_BUILD_64" != yes; then
- # reset
- CFLAGS="${CFLAGS_OLD}"
- CXXFLAGS="${CXXFLAGS_OLD}"
- # append
- CFLAGS="${CFLAGS} +DA2.0W"
- CXXFLAGS="${CXXFLAGS} +DA2.0W"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no)
- fi
- ;;
- *-*ibm-openedition*|*-*-os390*)
- CFLAGS="${CFLAGS} -Wc,lp64"
- CXXFLAGS="${CXXFLAGS} -Wc,lp64"
- LDFLAGS="${LDFLAGS} -Wl,lp64"
- AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- CAN_BUILD_64=yes, CAN_BUILD_64=no)
- ;;
- *)
- # unknown platform.
- ;;
- esac
- fi
- AC_MSG_RESULT($CAN_BUILD_64)
- if test "$CAN_BUILD_64" = yes; then
- AC_MSG_CHECKING([whether runnable 64-bit binaries are being built ])
- AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
- BITS_RUN_64=yes, BITS_RUN_64=no, BITS_RUN_64=unknown)
- AC_MSG_RESULT($BITS_RUN_64);
projects / apple / icu.git / blobdiff