[apple/icu.git] / icuSources / acinclude.m4

# Copyright (c) 1999-2015, International Business Machines Corporation and
# others. All Rights Reserved.
# acinclude.m4 for ICU
# Don't edit aclocal.m4, do edit acinclude.m4
# Stephen F. Booth

# @TOP@

# ICU_CHECK_MH_FRAG
AC_DEFUN([ICU_CHECK_MH_FRAG], [
	AC_CACHE_CHECK(
		[which Makefile fragment to use for ${host}],
		[icu_cv_host_frag],
		[
case "${host}" in
*-*-solaris*)
	if test "$GCC" = yes; then	
		icu_cv_host_frag=mh-solaris-gcc
	else
		icu_cv_host_frag=mh-solaris
	fi ;;
alpha*-*-linux-gnu)
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-alpha-linux-gcc
	else
		icu_cv_host_frag=mh-alpha-linux-cc
	fi ;;
powerpc*-*-linux*)
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-linux
	else
		icu_cv_host_frag=mh-linux-va
	fi ;;
*-*-linux*|*-*-gnu|*-*-k*bsd*-gnu|*-*-kopensolaris*-gnu) icu_cv_host_frag=mh-linux ;;
i[[34567]]86-*-cygwin) 
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-cygwin
	else
		icu_cv_host_frag=mh-cygwin-msvc
	fi ;;
x86_64-*-cygwin) 
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-cygwin64
	else
		icu_cv_host_frag=mh-cygwin-msvc
	fi ;;
*-*-mingw*)
	if test "$GCC" = yes; then
                AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifndef __MINGW64__
#error This is not MinGW64
#endif]])],                        [icu_cv_host_frag=mh-mingw64],
                                   [icu_cv_host_frag=mh-mingw])
	else
	        case "${host}" in
		*-*-mingw*) icu_cv_host_frag=mh-msys-msvc ;;
		*-*-cygwin) icu_cv_host_frag=mh-cygwin-msvc ;;
		esac
	fi ;;
*-*-*bsd*|*-*-dragonfly*) 	icu_cv_host_frag=mh-bsd-gcc ;;
*-*-aix*)
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-aix-gcc
	else
		icu_cv_host_frag=mh-aix-va
	fi ;;
*-*-hpux*)
	if test "$GCC" = yes; then
		icu_cv_host_frag=mh-hpux-gcc
	else
		case "$CXX" in
		*aCC)    icu_cv_host_frag=mh-hpux-acc ;;
		esac
	fi ;;
*-*ibm-openedition*|*-*-os390*)	icu_cv_host_frag=mh-os390 ;;
*-*-os400*)	icu_cv_host_frag=mh-os400 ;;
*-apple-rhapsody*)	icu_cv_host_frag=mh-darwin ;;
*-apple-darwin*)	icu_cv_host_frag=mh-darwin ;;
*-*-beos)       icu_cv_host_frag=mh-beos ;; 
*-*-haiku)      icu_cv_host_frag=mh-haiku ;; 
*-*-irix*)	icu_cv_host_frag=mh-irix ;;
*-dec-osf*) icu_cv_host_frag=mh-alpha-osf ;;
*-*-nto*)	icu_cv_host_frag=mh-qnx ;;
*-ncr-*)	icu_cv_host_frag=mh-mpras ;;
*) 		icu_cv_host_frag=mh-unknown ;;
esac
		]
	)
])

# ICU_PROG_LINK - Make sure that the linker is usable
AC_DEFUN([ICU_PROG_LINK],
[
case "${host}" in
    *-*-cygwin*|*-*-mingw*)
        if test "$GCC" != yes && test -n "`link --version 2>&1 | grep 'GNU coreutils'`"; then
            AC_MSG_ERROR([link.exe is not a valid linker. Your PATH is incorrect.
                  Please follow the directions in ICU's readme.])
        fi;;
    *);;
esac])

# AC_SEARCH_LIBS_FIRST(FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND
#            [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
# Search for a library defining FUNC, then see if it's not already available.

AC_DEFUN([AC_SEARCH_LIBS_FIRST],
[AC_PREREQ([2.13])
AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1],
[ac_func_search_save_LIBS="$LIBS"
ac_cv_search_$1="no"
for i in $2; do
LIBS="-l$i $5 $ac_func_search_save_LIBS"
AC_TRY_LINK_FUNC([$1],
[ac_cv_search_$1="-l$i"
break])
done
if test "$ac_cv_search_$1" = "no"; then
AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"])
fi
LIBS="$ac_func_search_save_LIBS"])
if test "$ac_cv_search_$1" != "no"; then
  test "$ac_cv_search_$1" = "none required" || LIBS="$ac_cv_search_$1 $LIBS"
  $3
else :
  $4
fi])


# 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="${CXXFLAGS_OLD}"
                        # 2. try xarch=v9 [deprecated]
                        ## TODO: cross compile: the following won't work.
                        SPARCV9=`isainfo -n 2>&1 | grep sparcv9`
                        SOL64=`$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);

                CFLAGS_64="${CFLAGS}"
                CXXFLAGS_64="${CXXFLAGS}"
                LDFLAGS_64="${LDFLAGS}"
                ARFLAGS_64="${ARFLAGS}"        
            fi
            # put it back.
            CFLAGS="${CFLAGS_OLD}"
            CXXFLAGS="${CXXFLAGS_OLD}"
            LDFLAGS="${LDFLAGS_OLD}"
            ARFLAGS="${ARFLAGS_OLD}"     
        fi
        if test "$BITS_CHECK_32" = "yes"; then
            # see comment under 'if BITS_CHECK_64', above.
            AC_MSG_CHECKING([how to build 32-bit executables])
            if test "$GCC" = yes; then
                CFLAGS="${CFLAGS} -m32"
                CXXFLAGS="${CXXFLAGS} -m32"
                AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==32)?0:1;}])],
                   CAN_BUILD_32=yes, CAN_BUILD_32=no)
            fi
            AC_MSG_RESULT($CAN_BUILD_32)
            if test "$CAN_BUILD_32" = yes; then
                AC_MSG_CHECKING([whether runnable 32-bit binaries are being built ])
                AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==32)?0:1;}])],
                   BITS_RUN_32=yes, BITS_RUN_32=no, BITS_RUN_32=unknown)
                AC_MSG_RESULT($BITS_RUN_32);
                CFLAGS_32="${CFLAGS}"
                CXXFLAGS_32="${CXXFLAGS}"
                LDFLAGS_32="${LDFLAGS}"
                ARFLAGS_32="${ARFLAGS}"        
            fi
            # put it back.
            CFLAGS="${CFLAGS_OLD}"
            CXXFLAGS="${CXXFLAGS_OLD}"
            LDFLAGS="${LDFLAGS_OLD}"
            ARFLAGS="${ARFLAGS_OLD}"     
        fi
        
        ##
        # OK. Now, we've tested for 32 and 64 bitness. Let's see what we'll do.
        #
        
        # First, implement 64else32
        if test "$BITS_REQ" = "64else32"; then
            if test "$BITS_RUN_64" = "yes"; then
                BITS_REQ=64
            else
                # no changes.
                BITS_OK=yes 
            fi
        fi
        
        # implement.
        if test "$BITS_REQ" = "32" -a "$BITS_RUN_32" = "yes"; then
            CFLAGS="${CFLAGS_32}"
            CXXFLAGS="${CXXFLAGS_32}"
            LDFLAGS="${LDFLAGS_32}"
            ARFLAGS="${ARFLAGS_32}"     
            BITS_OK=yes
        elif test "$BITS_REQ" = "64" -a "$BITS_RUN_64" = "yes"; then
            CFLAGS="${CFLAGS_64}"
            CXXFLAGS="${CXXFLAGS_64}"
            LDFLAGS="${LDFLAGS_64}"
            ARFLAGS="${ARFLAGS_64}"     
            BITS_OK=yes
        elif test "$BITS_OK" != "yes"; then
            AC_MSG_ERROR([Requested $BITS_REQ bit binaries but could not compile and execute them. See readme.html for help with cross compilation., and set compiler options manually.])
        fi
     fi
])

# Strict compilation options.
AC_DEFUN([AC_CHECK_STRICT_COMPILE],
[
    AC_MSG_CHECKING([whether strict compiling is on])
    AC_ARG_ENABLE(strict,[  --enable-strict         compile with strict compiler options [default=yes]], [
        if test "$enableval" = no
        then
            ac_use_strict_options=no
        else
            ac_use_strict_options=yes
        fi
      ], [ac_use_strict_options=yes])
    AC_MSG_RESULT($ac_use_strict_options)

    if test "$ac_use_strict_options" = yes
    then
        if test "$GCC" = yes
        then
            case "${host}" in
            *)
                # Do not use -ansi. It limits us to C90, and it breaks some platforms.
                # We use -std=c99 to disable the gnu99 defaults and its associated warnings
                CFLAGS="$CFLAGS -std=c99"
                ;;
            esac
            
            CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
        else
            case "${host}" in
            *-*-cygwin)
                if test "`$CC /help 2>&1 | head -c9`" = "Microsoft"
                then
                    CFLAGS="$CFLAGS /W4"
                fi ;;
            *-*-mingw*)
                CFLAGS="$CFLAGS -W4" ;;
            esac
        fi
        if test "$GXX" = yes
        then
            CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
        else
            case "${host}" in
            *-*-cygwin)
                if test "`$CXX /help 2>&1 | head -c9`" = "Microsoft"
                then
                    CXXFLAGS="$CXXFLAGS /W4"
                fi ;;
            *-*-mingw*)
                CFLAGS="$CFLAGS -W4" ;;
            esac
        fi
    fi
])
Commit	Line	Data
2ca993e8	1	# Copyright (c) 1999-2015, International Business Machines Corporation and
57a6839d A	2	# others. All Rights Reserved.
	3	# acinclude.m4 for ICU
	4	# Don't edit aclocal.m4, do edit acinclude.m4
	5	# Stephen F. Booth
	6
	7	# @TOP@
	8
	9	# ICU_CHECK_MH_FRAG
	10	AC_DEFUN([ICU_CHECK_MH_FRAG], [
	11	AC_CACHE_CHECK(
	12	[which Makefile fragment to use for ${host}],
	13	[icu_cv_host_frag],
	14	[
	15	case "${host}" in
	16	--solaris*)
	17	if test "$GCC" = yes; then
	18	icu_cv_host_frag=mh-solaris-gcc
	19	else
	20	icu_cv_host_frag=mh-solaris
	21	fi ;;
	22	alpha--linux-gnu)
	23	if test "$GCC" = yes; then
	24	icu_cv_host_frag=mh-alpha-linux-gcc
	25	else
	26	icu_cv_host_frag=mh-alpha-linux-cc
	27	fi ;;
	28	powerpc--linux*)
	29	if test "$GCC" = yes; then
	30	icu_cv_host_frag=mh-linux
	31	else
	32	icu_cv_host_frag=mh-linux-va
	33	fi ;;
	34	--linux\|--gnu\|--kbsd-gnu\|--kopensolaris-gnu) icu_cv_host_frag=mh-linux ;;
b331163b	35	i[[34567]]86-*-cygwin)
57a6839d	36	if test "$GCC" = yes; then
b331163b A	37	icu_cv_host_frag=mh-cygwin
	38	else
	39	icu_cv_host_frag=mh-cygwin-msvc
	40	fi ;;
	41	x86_64-*-cygwin)
	42	if test "$GCC" = yes; then
	43	icu_cv_host_frag=mh-cygwin64
	44	else
	45	icu_cv_host_frag=mh-cygwin-msvc
	46	fi ;;
	47	--mingw*)
	48	if test "$GCC" = yes; then
	49	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
57a6839d A	50	#ifndef __MINGW64__
57a6839d A	51	#error This is not MinGW64
b331163b A	52	#endif]])], [icu_cv_host_frag=mh-mingw64],
b331163b A	53	[icu_cv_host_frag=mh-mingw])
57a6839d	54	else
b331163b A	55	case "${host}" in
	56	--mingw*) icu_cv_host_frag=mh-msys-msvc ;;
	57	--cygwin) icu_cv_host_frag=mh-cygwin-msvc ;;
	58	esac
57a6839d A	59	fi ;;
	60	--bsd\|--dragonfly*) icu_cv_host_frag=mh-bsd-gcc ;;
	61	--aix*)
	62	if test "$GCC" = yes; then
	63	icu_cv_host_frag=mh-aix-gcc
	64	else
	65	icu_cv_host_frag=mh-aix-va
	66	fi ;;
	67	--hpux*)
	68	if test "$GCC" = yes; then
	69	icu_cv_host_frag=mh-hpux-gcc
	70	else
	71	case "$CXX" in
	72	*aCC) icu_cv_host_frag=mh-hpux-acc ;;
	73	esac
	74	fi ;;
	75	-ibm-openedition\|--os390) icu_cv_host_frag=mh-os390 ;;
	76	--os400*) icu_cv_host_frag=mh-os400 ;;
	77	-apple-rhapsody) icu_cv_host_frag=mh-darwin ;;
	78	-apple-darwin) icu_cv_host_frag=mh-darwin ;;
	79	--beos) icu_cv_host_frag=mh-beos ;;
	80	--haiku) icu_cv_host_frag=mh-haiku ;;
	81	--irix*) icu_cv_host_frag=mh-irix ;;
	82	-dec-osf) icu_cv_host_frag=mh-alpha-osf ;;
	83	--nto*) icu_cv_host_frag=mh-qnx ;;
	84	-ncr-) icu_cv_host_frag=mh-mpras ;;
	85	*) icu_cv_host_frag=mh-unknown ;;
	86	esac
	87	]
	88	)
	89	])
	90
57a6839d A	91	# ICU_PROG_LINK - Make sure that the linker is usable
	92	AC_DEFUN([ICU_PROG_LINK],
	93	[
	94	case "${host}" in
	95	--cygwin\|--mingw)
	96	if test "$GCC" != yes && test -n "`link --version 2>&1 \| grep 'GNU coreutils'`"; then
	97	AC_MSG_ERROR([link.exe is not a valid linker. Your PATH is incorrect.
	98	Please follow the directions in ICU's readme.])
	99	fi;;
	100	*);;
	101	esac])
	102
	103	# AC_SEARCH_LIBS_FIRST(FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND
	104	# [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
	105	# Search for a library defining FUNC, then see if it's not already available.
	106
	107	AC_DEFUN([AC_SEARCH_LIBS_FIRST],
	108	[AC_PREREQ([2.13])
	109	AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1],
	110	[ac_func_search_save_LIBS="$LIBS"
	111	ac_cv_search_$1="no"
	112	for i in $2; do
	113	LIBS="-l$i $5 $ac_func_search_save_LIBS"
	114	AC_TRY_LINK_FUNC([$1],
	115	[ac_cv_search_$1="-l$i"
	116	break])
	117	done
	118	if test "$ac_cv_search_$1" = "no"; then
	119	AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"])
	120	fi
	121	LIBS="$ac_func_search_save_LIBS"])
	122	if test "$ac_cv_search_$1" != "no"; then
	123	test "$ac_cv_search_$1" = "none required" \|\| LIBS="$ac_cv_search_$1 $LIBS"
	124	$3
	125	else :
	126	$4
	127	fi])
	128
	129
	130
	131	# Check if we can build and use 64-bit libraries
	132	AC_DEFUN([AC_CHECK_64BIT_LIBS],
	133	[
	134	BITS_REQ=nochange
	135	ENABLE_64BIT_LIBS=unknown
	136	## revisit this for cross-compile.
	137
	138	AC_ARG_ENABLE(64bit-libs,
	139	[ --enable-64bit-libs (deprecated, use --with-library-bits) build 64-bit libraries [default= platform default]],
	140	[echo "note, use --with-library-bits instead of --*-64bit-libs"
	141	case "${enableval}" in
	142	no\|false\|32) with_library_bits=32; ;;
	143	yes\|true\|64) with_library_bits=64else32 ;;
	144	nochange) with_library_bits=nochange; ;;
	145	) AC_MSG_ERROR(bad value ${enableval} for '---64bit-libs') ;;
	146	esac] )
	147
	148
	149	AC_ARG_WITH(library-bits,
	150	[ --with-library-bits=bits specify how many bits to use for the library (32, 64, 64else32, nochange) [default=nochange]],
	151	[case "${withval}" in
	152	""\|nochange) BITS_REQ=$withval ;;
	153	32\|64\|64else32) BITS_REQ=$withval ;;
	154	*) AC_MSG_ERROR(bad value ${withval} for --with-library-bits) ;;
155	esac])
156
157	# don't use these for cross compiling
158	if test "$cross_compiling" = "yes" -a "${BITS_REQ}" != "nochange"; then
159	AC_MSG_ERROR([Don't specify bitness when cross compiling. See readme.html for help with cross compilation., and set compiler options manually.])
160	fi
161	AC_CHECK_SIZEOF([void *])
162	AC_MSG_CHECKING([whether runnable 64 bit binaries are built by default])
163	case $ac_cv_sizeof_void_p in
164	8) DEFAULT_64BIT=yes ;;
165	4) DEFAULT_64BIT=no ;;
166	*) DEFAULT_64BIT=unknown
167	esac
168	BITS_GOT=unknown
169
170	# 'OK' here means, we can exit any further checking, everything's copa
171	BITS_OK=yes
172
173	# do we need to check for buildable/runnable 32 or 64 bit?
174	BITS_CHECK_32=no
175	BITS_CHECK_64=no
176
177	# later, can we run the 32/64 bit binaries so made?
178	BITS_RUN_32=no
179	BITS_RUN_64=no
180
181	if test "$DEFAULT_64BIT" = "yes"; then
182	# we get 64 bits by default.
183	BITS_GOT=64
184	case "$BITS_REQ" in
185	32)
186	# need to look for 32 bit support.
187	BITS_CHECK_32=yes
188	# not copa.
189	BITS_OK=no;;
190	# everyone else is happy.
191	nochange) ;;
192	*) ;;
193	esac
194	elif test "$DEFAULT_64BIT" = "no"; then
195	# not 64 bit by default.
196	BITS_GOT=32
197	case "$BITS_REQ" in
198	64\|64else32)
199	BITS_CHECK_64=yes
200	#BITS_CHECK_32=yes
201	BITS_OK=no;;
202	nochange) ;;
203	*) ;;
204	esac
205	elif test "$DEFAULT_64BIT" = "unknown"; then
206	# cross compiling.
207	BITS_GOT=unknown
208	case "$BITS_REQ" in
209	64\|64else32) BITS_OK=no
210	BITS_CHECK_32=yes
211	BITS_CHECK_64=yes ;;
212	32) BITS_OK=no;;
213	nochange) ;;
214	*) ;;
215	esac
216	fi
217
218	AC_MSG_RESULT($DEFAULT_64BIT);
219
220	if test "$BITS_OK" != "yes"; then
221	# not copa. back these up.
222	CFLAGS_OLD="${CFLAGS}"
223	CXXFLAGS_OLD="${CXXFLAGS}"
224	LDFLAGS_OLD="${LDFLAGS}"
225	ARFLAGS_OLD="${ARFLAGS}"
226
227	CFLAGS_32="${CFLAGS}"
228	CXXFLAGS_32="${CXXFLAGS}"
229	LDFLAGS_32="${LDFLAGS}"
230	ARFLAGS_32="${ARFLAGS}"
231
232	CFLAGS_64="${CFLAGS}"
233	CXXFLAGS_64="${CXXFLAGS}"
234	LDFLAGS_64="${LDFLAGS}"
235	ARFLAGS_64="${ARFLAGS}"
236
237	CAN_BUILD_64=unknown
238	CAN_BUILD_32=unknown
239	# These results can't be cached because is sets compiler flags.
240	if test "$BITS_CHECK_64" = "yes"; then
241	AC_MSG_CHECKING([how to build 64-bit executables])
242	CAN_BUILD_64=no
243	####
244	# Find out if we think we can build for 64 bit. Doesn't check whether we can run it.
245	# Note, we don't have to actually check if the options work- we'll try them before using them.
246	# So, only try actually testing the options, if you are trying to decide between multiple options.
247	# On exit from the following clauses:
248	# if CAN_BUILD_64=yes:
249	# *FLAGS are assumed to contain the right settings for 64bit
250	# else if CAN_BUILD_64=no: (default)
251	# FLAGS are assumed to be trashed, and will be reset from FLAGS_OLD
252
253	if test "$GCC" = yes; then
254	CFLAGS="${CFLAGS} -m64"
255	CXXFLAGS="${CXXFLAGS} -m64"
256	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
257	CAN_BUILD_64=yes, CAN_BUILD_64=no)
258	else
259	case "${host}" in
260	sparc--solaris*)
261	# 1. try -m64
262	CFLAGS="${CFLAGS} -m64"
263	CXXFLAGS="${CXXFLAGS} -m64"
264	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
265	CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
266	if test "$CAN_BUILD_64" != yes; then
267	# Nope. back out changes.
268	CFLAGS="${CFLAGS_OLD}"
b331163b	269	CXXFLAGS="${CXXFLAGS_OLD}"
57a6839d A	270	# 2. try xarch=v9 [deprecated]
	271	## TODO: cross compile: the following won't work.
	272	SPARCV9=`isainfo -n 2>&1 \| grep sparcv9`
	273	SOL64=`$CXX -xarch=v9 2>&1 && $CC -xarch=v9 2>&1 \| grep -v usage:`
	274	# "Warning: -xarch=v9 is deprecated, use -m64 to create 64-bit programs"
	275	if test -z "$SOL64" && test -n "$SPARCV9"; then
	276	CFLAGS="${CFLAGS} -xtarget=ultra -xarch=v9"
	277	CXXFLAGS="${CXXFLAGS} -xtarget=ultra -xarch=v9"
	278	LDFLAGS="${LDFLAGS} -xtarget=ultra -xarch=v9"
	279	CAN_BUILD_64=yes
	280	fi
	281	fi
	282	;;
	283	i386--solaris)
	284	# 1. try -m64
	285	CFLAGS="${CFLAGS} -m64"
	286	CXXFLAGS="${CXXFLAGS} -m64"
	287	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
	288	CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
	289	if test "$CAN_BUILD_64" != yes; then
	290	# Nope. back out changes.
	291	CFLAGS="${CFLAGS_OLD}"
	292	CXXFLAGS="${CXXFLAGS_OLD}"
	293	# 2. try the older compiler option
	294	## TODO: cross compile problem
	295	AMD64=`isainfo -n 2>&1 \| grep amd64`
	296	SOL64=`$CXX -xtarget=generic64 2>&1 && $CC -xtarget=generic64 2>&1 \| grep -v usage:`
	297	if test -z "$SOL64" && test -n "$AMD64"; then
	298	CFLAGS="${CFLAGS} -xtarget=generic64"
	299	CXXFLAGS="${CXXFLAGS} -xtarget=generic64"
	300	CAN_BUILD_64=yes
	301	fi
	302	fi
	303	;;
	304	ia64--linux)
	305	# check for ecc/ecpc compiler support
	306	## TODO: cross compiler problem
	307	if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 \| grep -v Intel`"; then
	308	if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 \| grep -v Itanium`"; then
	309	CAN_BUILD_64=yes
	310	fi
	311	fi
	312	;;
	313	--cygwin)
	314	# vcvarsamd64.bat should have been used to enable 64-bit builds.
	315	# We only do this check to display the correct answer.
	316	## TODO: cross compiler problem
	317	if test -n "`$CXX -help 2>&1 \| grep 'for x64'`"; then
	318	CAN_BUILD_64=yes
	319	fi
	320	;;
	321	--aix\|powerpc64--linux*)
	322	CFLAGS="${CFLAGS} -q64"
	323	CXXFLAGS="${CXXFLAGS} -q64"
	324	LDFLAGS="${LDFLAGS} -q64"
	325	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
	326	CAN_BUILD_64=yes, CAN_BUILD_64=no)
	327	if test "$CAN_BUILD_64" = yes; then
	328	# worked- set other options.
	329	case "${host}" in
	330	--aix*)
	331	# tell AIX what executable mode to use.
	332	ARFLAGS="${ARFLAGS} -X64"
	333	esac
334	fi
335	;;
336	--hpux*)
337	# First we try the newer +DD64, if that doesn't work,
338	# try other options.
339
340	CFLAGS="${CFLAGS} +DD64"
341	CXXFLAGS="${CXXFLAGS} +DD64"
342	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
343	CAN_BUILD_64=yes, CAN_BUILD_64=no)
344	if test "$CAN_BUILD_64" != yes; then
345	# reset
346	CFLAGS="${CFLAGS_OLD}"
347	CXXFLAGS="${CXXFLAGS_OLD}"
348	# append
349	CFLAGS="${CFLAGS} +DA2.0W"
350	CXXFLAGS="${CXXFLAGS} +DA2.0W"
351	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
352	CAN_BUILD_64=yes, CAN_BUILD_64=no)
353	fi
354	;;
355	-ibm-openedition\|--os390)
356	CFLAGS="${CFLAGS} -Wc,lp64"
357	CXXFLAGS="${CXXFLAGS} -Wc,lp64"
358	LDFLAGS="${LDFLAGS} -Wl,lp64"
359	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
360	CAN_BUILD_64=yes, CAN_BUILD_64=no)
361	;;
362	*)
363	# unknown platform.
364	;;
365	esac
366	fi
367	AC_MSG_RESULT($CAN_BUILD_64)
368	if test "$CAN_BUILD_64" = yes; then
369	AC_MSG_CHECKING([whether runnable 64-bit binaries are being built ])
370	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
371	BITS_RUN_64=yes, BITS_RUN_64=no, BITS_RUN_64=unknown)
372	AC_MSG_RESULT($BITS_RUN_64);
373
374	CFLAGS_64="${CFLAGS}"
375	CXXFLAGS_64="${CXXFLAGS}"
376	LDFLAGS_64="${LDFLAGS}"
377	ARFLAGS_64="${ARFLAGS}"
378	fi
379	# put it back.
380	CFLAGS="${CFLAGS_OLD}"
381	CXXFLAGS="${CXXFLAGS_OLD}"
382	LDFLAGS="${LDFLAGS_OLD}"
383	ARFLAGS="${ARFLAGS_OLD}"
384	fi
385	if test "$BITS_CHECK_32" = "yes"; then
386	# see comment under 'if BITS_CHECK_64', above.
387	AC_MSG_CHECKING([how to build 32-bit executables])
388	if test "$GCC" = yes; then
389	CFLAGS="${CFLAGS} -m32"
390	CXXFLAGS="${CXXFLAGS} -m32"
391	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==32)?0:1;}])],
392	CAN_BUILD_32=yes, CAN_BUILD_32=no)
393	fi
394	AC_MSG_RESULT($CAN_BUILD_32)
395	if test "$CAN_BUILD_32" = yes; then
396	AC_MSG_CHECKING([whether runnable 32-bit binaries are being built ])
397	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==32)?0:1;}])],
398	BITS_RUN_32=yes, BITS_RUN_32=no, BITS_RUN_32=unknown)
399	AC_MSG_RESULT($BITS_RUN_32);
400	CFLAGS_32="${CFLAGS}"
401	CXXFLAGS_32="${CXXFLAGS}"
402	LDFLAGS_32="${LDFLAGS}"
403	ARFLAGS_32="${ARFLAGS}"
404	fi
405	# put it back.
406	CFLAGS="${CFLAGS_OLD}"
407	CXXFLAGS="${CXXFLAGS_OLD}"
408	LDFLAGS="${LDFLAGS_OLD}"
409	ARFLAGS="${ARFLAGS_OLD}"
410	fi
411
412	##
413	# OK. Now, we've tested for 32 and 64 bitness. Let's see what we'll do.
414	#
415
416	# First, implement 64else32
417	if test "$BITS_REQ" = "64else32"; then
418	if test "$BITS_RUN_64" = "yes"; then
419	BITS_REQ=64
420	else
421	# no changes.
422	BITS_OK=yes
423	fi
424	fi
425
426	# implement.
427	if test "$BITS_REQ" = "32" -a "$BITS_RUN_32" = "yes"; then
428	CFLAGS="${CFLAGS_32}"
429	CXXFLAGS="${CXXFLAGS_32}"
430	LDFLAGS="${LDFLAGS_32}"
431	ARFLAGS="${ARFLAGS_32}"
432	BITS_OK=yes
433	elif test "$BITS_REQ" = "64" -a "$BITS_RUN_64" = "yes"; then
434	CFLAGS="${CFLAGS_64}"
435	CXXFLAGS="${CXXFLAGS_64}"
436	LDFLAGS="${LDFLAGS_64}"
437	ARFLAGS="${ARFLAGS_64}"
438	BITS_OK=yes
439	elif test "$BITS_OK" != "yes"; then
440	AC_MSG_ERROR([Requested $BITS_REQ bit binaries but could not compile and execute them. See readme.html for help with cross compilation., and set compiler options manually.])
441	fi
442	fi
443	])
444
445	# Strict compilation options.
446	AC_DEFUN([AC_CHECK_STRICT_COMPILE],
447	[
448	AC_MSG_CHECKING([whether strict compiling is on])
449	AC_ARG_ENABLE(strict,[ --enable-strict compile with strict compiler options [default=yes]], [
450	if test "$enableval" = no
451	then
452	ac_use_strict_options=no
453	else
454	ac_use_strict_options=yes
455	fi
456	], [ac_use_strict_options=yes])
457	AC_MSG_RESULT($ac_use_strict_options)
458
459	if test "$ac_use_strict_options" = yes
460	then
461	if test "$GCC" = yes
462	then
463	case "${host}" in
57a6839d A	464	*)
	465	# Do not use -ansi. It limits us to C90, and it breaks some platforms.
	466	# We use -std=c99 to disable the gnu99 defaults and its associated warnings
	467	CFLAGS="$CFLAGS -std=c99"
	468	;;
	469	esac
	470
	471	CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
	472	else
	473	case "${host}" in
	474	--cygwin)
	475	if test "`$CC /help 2>&1 \| head -c9`" = "Microsoft"
	476	then
	477	CFLAGS="$CFLAGS /W4"
b331163b A	478	fi ;;
	479	--mingw*)
	480	CFLAGS="$CFLAGS -W4" ;;
57a6839d A	481	esac
	482	fi
	483	if test "$GXX" = yes
	484	then
	485	CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
	486	else
	487	case "${host}" in
	488	--cygwin)
	489	if test "`$CXX /help 2>&1 \| head -c9`" = "Microsoft"
	490	then
	491	CXXFLAGS="$CXXFLAGS /W4"
b331163b A	492	fi ;;
	493	--mingw*)
	494	CFLAGS="$CFLAGS -W4" ;;
57a6839d A	495	esac
	496	fi
	497	fi
	498	])
	499
	500