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

# Copyright (c) 1999-2013, 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 "$GCC" = yes; then
		icu_cv_host_frag=mh-linux
	else
		icu_cv_host_frag=mh-linux-va
	fi ;;
*-*-linux*|*-*-gnu|*-*-k*bsd*-gnu|*-*-kopensolaris*-gnu) icu_cv_host_frag=mh-linux ;;
*-*-cygwin|*-*-mingw32|*-*-mingw64)
	if test "$GCC" = yes; then
		AC_TRY_COMPILE([
#ifndef __MINGW32__
#error This is not MinGW
#endif], [], AC_TRY_COMPILE([
#ifndef __MINGW64__
#error This is not MinGW64
#endif], [], icu_cv_host_frag=mh-mingw64, icu_cv_host_frag=mh-mingw), icu_cv_host_frag=mh-cygwin)
	else
		icu_cv_host_frag=mh-cygwin-msvc
	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_CONDITIONAL - similar example taken from Automake 1.4
AC_DEFUN([ICU_CONDITIONAL],
[AC_SUBST($1_TRUE)
if $2; then
  $1_TRUE=
else
  $1_TRUE='#'
fi])

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

                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 "${host}" in
            *-*-solaris*)
                # Don't use -std=c99 option on Solaris/GCC
                ;;
            *)
                # Do not use -ansi. It limits us to C90, and it breaks some platforms.
                # We use -std=c99 to disable the gnu99 defaults and its associated warnings
                CFLAGS="$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
            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
            esac
        fi
    fi
])
Commit	Line	Data
57a6839d A	1	# Copyright (c) 1999-2013, International Business Machines Corporation and
	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 "$GCC" = yes; then
	30	icu_cv_host_frag=mh-linux
	31	else
	32	icu_cv_host_frag=mh-linux-va
	33	fi ;;
	34	--linux\|--gnu\|--kbsd-gnu\|--kopensolaris-gnu) icu_cv_host_frag=mh-linux ;;
	35	--cygwin\|--mingw32\|--mingw64)
	36	if test "$GCC" = yes; then
	37	AC_TRY_COMPILE([
	38	#ifndef __MINGW32__
	39	#error This is not MinGW
	40	#endif], [], AC_TRY_COMPILE([
	41	#ifndef __MINGW64__
	42	#error This is not MinGW64
	43	#endif], [], icu_cv_host_frag=mh-mingw64, icu_cv_host_frag=mh-mingw), icu_cv_host_frag=mh-cygwin)
	44	else
	45	icu_cv_host_frag=mh-cygwin-msvc
	46	fi ;;
	47	--bsd\|--dragonfly*) icu_cv_host_frag=mh-bsd-gcc ;;
	48	--aix*)
	49	if test "$GCC" = yes; then
	50	icu_cv_host_frag=mh-aix-gcc
	51	else
	52	icu_cv_host_frag=mh-aix-va
	53	fi ;;
	54	--hpux*)
	55	if test "$GCC" = yes; then
	56	icu_cv_host_frag=mh-hpux-gcc
	57	else
	58	case "$CXX" in
	59	*aCC) icu_cv_host_frag=mh-hpux-acc ;;
	60	esac
	61	fi ;;
	62	-ibm-openedition\|--os390) icu_cv_host_frag=mh-os390 ;;
	63	--os400*) icu_cv_host_frag=mh-os400 ;;
	64	-apple-rhapsody) icu_cv_host_frag=mh-darwin ;;
65	-apple-darwin) icu_cv_host_frag=mh-darwin ;;
66	--beos) icu_cv_host_frag=mh-beos ;;
67	--haiku) icu_cv_host_frag=mh-haiku ;;
68	--irix*) icu_cv_host_frag=mh-irix ;;
69	-dec-osf) icu_cv_host_frag=mh-alpha-osf ;;
70	--nto*) icu_cv_host_frag=mh-qnx ;;
71	-ncr-) icu_cv_host_frag=mh-mpras ;;
72	*) icu_cv_host_frag=mh-unknown ;;
73	esac
74	]
75	)
76	])
77
78	# ICU_CONDITIONAL - similar example taken from Automake 1.4
79	AC_DEFUN([ICU_CONDITIONAL],
80	[AC_SUBST($1_TRUE)
81	if $2; then
82	$1_TRUE=
83	else
84	$1_TRUE='#'
85	fi])
86
87	# ICU_PROG_LINK - Make sure that the linker is usable
88	AC_DEFUN([ICU_PROG_LINK],
89	[
90	case "${host}" in
91	--cygwin\|--mingw)
92	if test "$GCC" != yes && test -n "`link --version 2>&1 \| grep 'GNU coreutils'`"; then
93	AC_MSG_ERROR([link.exe is not a valid linker. Your PATH is incorrect.
94	Please follow the directions in ICU's readme.])
95	fi;;
96	*);;
97	esac])
98
99	# AC_SEARCH_LIBS_FIRST(FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND
100	# [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
101	# Search for a library defining FUNC, then see if it's not already available.
102
103	AC_DEFUN([AC_SEARCH_LIBS_FIRST],
104	[AC_PREREQ([2.13])
105	AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1],
106	[ac_func_search_save_LIBS="$LIBS"
107	ac_cv_search_$1="no"
108	for i in $2; do
109	LIBS="-l$i $5 $ac_func_search_save_LIBS"
110	AC_TRY_LINK_FUNC([$1],
111	[ac_cv_search_$1="-l$i"
112	break])
113	done
114	if test "$ac_cv_search_$1" = "no"; then
115	AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"])
116	fi
117	LIBS="$ac_func_search_save_LIBS"])
118	if test "$ac_cv_search_$1" != "no"; then
119	test "$ac_cv_search_$1" = "none required" \|\| LIBS="$ac_cv_search_$1 $LIBS"
120	$3
121	else :
122	$4
123	fi])
124
125
126
127	# Check if we can build and use 64-bit libraries
128	AC_DEFUN([AC_CHECK_64BIT_LIBS],
129	[
130	BITS_REQ=nochange
131	ENABLE_64BIT_LIBS=unknown
132	## revisit this for cross-compile.
133
134	AC_ARG_ENABLE(64bit-libs,
135	[ --enable-64bit-libs (deprecated, use --with-library-bits) build 64-bit libraries [default= platform default]],
136	[echo "note, use --with-library-bits instead of --*-64bit-libs"
137	case "${enableval}" in
138	no\|false\|32) with_library_bits=32; ;;
139	yes\|true\|64) with_library_bits=64else32 ;;
140	nochange) with_library_bits=nochange; ;;
141	) AC_MSG_ERROR(bad value ${enableval} for '---64bit-libs') ;;
142	esac] )
143
144
145	AC_ARG_WITH(library-bits,
146	[ --with-library-bits=bits specify how many bits to use for the library (32, 64, 64else32, nochange) [default=nochange]],
147	[case "${withval}" in
148	""\|nochange) BITS_REQ=$withval ;;
149	32\|64\|64else32) BITS_REQ=$withval ;;
150	*) AC_MSG_ERROR(bad value ${withval} for --with-library-bits) ;;
151	esac])
152
153	# don't use these for cross compiling
154	if test "$cross_compiling" = "yes" -a "${BITS_REQ}" != "nochange"; then
155	AC_MSG_ERROR([Don't specify bitness when cross compiling. See readme.html for help with cross compilation., and set compiler options manually.])
156	fi
157	AC_CHECK_SIZEOF([void *])
158	AC_MSG_CHECKING([whether runnable 64 bit binaries are built by default])
159	case $ac_cv_sizeof_void_p in
160	8) DEFAULT_64BIT=yes ;;
161	4) DEFAULT_64BIT=no ;;
162	*) DEFAULT_64BIT=unknown
163	esac
164	BITS_GOT=unknown
165
166	# 'OK' here means, we can exit any further checking, everything's copa
167	BITS_OK=yes
168
169	# do we need to check for buildable/runnable 32 or 64 bit?
170	BITS_CHECK_32=no
171	BITS_CHECK_64=no
172
173	# later, can we run the 32/64 bit binaries so made?
174	BITS_RUN_32=no
175	BITS_RUN_64=no
176
177	if test "$DEFAULT_64BIT" = "yes"; then
178	# we get 64 bits by default.
179	BITS_GOT=64
180	case "$BITS_REQ" in
181	32)
182	# need to look for 32 bit support.
183	BITS_CHECK_32=yes
184	# not copa.
185	BITS_OK=no;;
186	# everyone else is happy.
187	nochange) ;;
188	*) ;;
189	esac
190	elif test "$DEFAULT_64BIT" = "no"; then
191	# not 64 bit by default.
192	BITS_GOT=32
193	case "$BITS_REQ" in
194	64\|64else32)
195	BITS_CHECK_64=yes
196	#BITS_CHECK_32=yes
197	BITS_OK=no;;
198	nochange) ;;
199	*) ;;
200	esac
201	elif test "$DEFAULT_64BIT" = "unknown"; then
202	# cross compiling.
203	BITS_GOT=unknown
204	case "$BITS_REQ" in
205	64\|64else32) BITS_OK=no
206	BITS_CHECK_32=yes
207	BITS_CHECK_64=yes ;;
208	32) BITS_OK=no;;
209	nochange) ;;
210	*) ;;
211	esac
212	fi
213
214	AC_MSG_RESULT($DEFAULT_64BIT);
215
216	if test "$BITS_OK" != "yes"; then
217	# not copa. back these up.
218	CFLAGS_OLD="${CFLAGS}"
219	CXXFLAGS_OLD="${CXXFLAGS}"
220	LDFLAGS_OLD="${LDFLAGS}"
221	ARFLAGS_OLD="${ARFLAGS}"
222
223	CFLAGS_32="${CFLAGS}"
224	CXXFLAGS_32="${CXXFLAGS}"
225	LDFLAGS_32="${LDFLAGS}"
226	ARFLAGS_32="${ARFLAGS}"
227
228	CFLAGS_64="${CFLAGS}"
229	CXXFLAGS_64="${CXXFLAGS}"
230	LDFLAGS_64="${LDFLAGS}"
231	ARFLAGS_64="${ARFLAGS}"
232
233	CAN_BUILD_64=unknown
234	CAN_BUILD_32=unknown
235	# These results can't be cached because is sets compiler flags.
236	if test "$BITS_CHECK_64" = "yes"; then
237	AC_MSG_CHECKING([how to build 64-bit executables])
238	CAN_BUILD_64=no
239	####
240	# Find out if we think we can build for 64 bit. Doesn't check whether we can run it.
241	# Note, we don't have to actually check if the options work- we'll try them before using them.
242	# So, only try actually testing the options, if you are trying to decide between multiple options.
243	# On exit from the following clauses:
244	# if CAN_BUILD_64=yes:
245	# *FLAGS are assumed to contain the right settings for 64bit
246	# else if CAN_BUILD_64=no: (default)
247	# FLAGS are assumed to be trashed, and will be reset from FLAGS_OLD
248
249	if test "$GCC" = yes; then
250	CFLAGS="${CFLAGS} -m64"
251	CXXFLAGS="${CXXFLAGS} -m64"
252	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
253	CAN_BUILD_64=yes, CAN_BUILD_64=no)
254	else
255	case "${host}" in
256	sparc--solaris*)
257	# 1. try -m64
258	CFLAGS="${CFLAGS} -m64"
259	CXXFLAGS="${CXXFLAGS} -m64"
260	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
261	CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
262	if test "$CAN_BUILD_64" != yes; then
263	# Nope. back out changes.
264	CFLAGS="${CFLAGS_OLD}"
265	CXXFLAGS="${CFLAGS_OLD}"
266	# 2. try xarch=v9 [deprecated]
267	## TODO: cross compile: the following won't work.
268	SPARCV9=`isainfo -n 2>&1 \| grep sparcv9`
269	SOL64=`$CXX -xarch=v9 2>&1 && $CC -xarch=v9 2>&1 \| grep -v usage:`
270	# "Warning: -xarch=v9 is deprecated, use -m64 to create 64-bit programs"
271	if test -z "$SOL64" && test -n "$SPARCV9"; then
272	CFLAGS="${CFLAGS} -xtarget=ultra -xarch=v9"
273	CXXFLAGS="${CXXFLAGS} -xtarget=ultra -xarch=v9"
274	LDFLAGS="${LDFLAGS} -xtarget=ultra -xarch=v9"
275	CAN_BUILD_64=yes
276	fi
277	fi
278	;;
279	i386--solaris)
280	# 1. try -m64
281	CFLAGS="${CFLAGS} -m64"
282	CXXFLAGS="${CXXFLAGS} -m64"
283	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
284	CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
285	if test "$CAN_BUILD_64" != yes; then
286	# Nope. back out changes.
287	CFLAGS="${CFLAGS_OLD}"
288	CXXFLAGS="${CXXFLAGS_OLD}"
289	# 2. try the older compiler option
290	## TODO: cross compile problem
291	AMD64=`isainfo -n 2>&1 \| grep amd64`
292	SOL64=`$CXX -xtarget=generic64 2>&1 && $CC -xtarget=generic64 2>&1 \| grep -v usage:`
293	if test -z "$SOL64" && test -n "$AMD64"; then
294	CFLAGS="${CFLAGS} -xtarget=generic64"
295	CXXFLAGS="${CXXFLAGS} -xtarget=generic64"
296	CAN_BUILD_64=yes
297	fi
298	fi
299	;;
300	ia64--linux)
301	# check for ecc/ecpc compiler support
302	## TODO: cross compiler problem
303	if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 \| grep -v Intel`"; then
304	if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 \| grep -v Itanium`"; then
305	CAN_BUILD_64=yes
306	fi
307	fi
308	;;
309	--cygwin)
310	# vcvarsamd64.bat should have been used to enable 64-bit builds.
311	# We only do this check to display the correct answer.
312	## TODO: cross compiler problem
313	if test -n "`$CXX -help 2>&1 \| grep 'for x64'`"; then
314	CAN_BUILD_64=yes
315	fi
316	;;
317	--aix\|powerpc64--linux*)
318	CFLAGS="${CFLAGS} -q64"
319	CXXFLAGS="${CXXFLAGS} -q64"
320	LDFLAGS="${LDFLAGS} -q64"
321	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
322	CAN_BUILD_64=yes, CAN_BUILD_64=no)
323	if test "$CAN_BUILD_64" = yes; then
324	# worked- set other options.
325	case "${host}" in
326	--aix*)
327	# tell AIX what executable mode to use.
328	ARFLAGS="${ARFLAGS} -X64"
329	esac
330	fi
331	;;
332	--hpux*)
333	# First we try the newer +DD64, if that doesn't work,
334	# try other options.
335
336	CFLAGS="${CFLAGS} +DD64"
337	CXXFLAGS="${CXXFLAGS} +DD64"
338	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
339	CAN_BUILD_64=yes, CAN_BUILD_64=no)
340	if test "$CAN_BUILD_64" != yes; then
341	# reset
342	CFLAGS="${CFLAGS_OLD}"
343	CXXFLAGS="${CXXFLAGS_OLD}"
344	# append
345	CFLAGS="${CFLAGS} +DA2.0W"
346	CXXFLAGS="${CXXFLAGS} +DA2.0W"
347	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
348	CAN_BUILD_64=yes, CAN_BUILD_64=no)
349	fi
350	;;
351	-ibm-openedition\|--os390)
352	CFLAGS="${CFLAGS} -Wc,lp64"
353	CXXFLAGS="${CXXFLAGS} -Wc,lp64"
354	LDFLAGS="${LDFLAGS} -Wl,lp64"
355	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
356	CAN_BUILD_64=yes, CAN_BUILD_64=no)
357	;;
358	*)
359	# unknown platform.
360	;;
361	esac
362	fi
363	AC_MSG_RESULT($CAN_BUILD_64)
364	if test "$CAN_BUILD_64" = yes; then
365	AC_MSG_CHECKING([whether runnable 64-bit binaries are being built ])
366	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==64)?0:1;}])],
367	BITS_RUN_64=yes, BITS_RUN_64=no, BITS_RUN_64=unknown)
368	AC_MSG_RESULT($BITS_RUN_64);
369
370	CFLAGS_64="${CFLAGS}"
371	CXXFLAGS_64="${CXXFLAGS}"
372	LDFLAGS_64="${LDFLAGS}"
373	ARFLAGS_64="${ARFLAGS}"
374	fi
375	# put it back.
376	CFLAGS="${CFLAGS_OLD}"
377	CXXFLAGS="${CXXFLAGS_OLD}"
378	LDFLAGS="${LDFLAGS_OLD}"
379	ARFLAGS="${ARFLAGS_OLD}"
380	fi
381	if test "$BITS_CHECK_32" = "yes"; then
382	# see comment under 'if BITS_CHECK_64', above.
383	AC_MSG_CHECKING([how to build 32-bit executables])
384	if test "$GCC" = yes; then
385	CFLAGS="${CFLAGS} -m32"
386	CXXFLAGS="${CXXFLAGS} -m32"
387	AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==32)?0:1;}])],
388	CAN_BUILD_32=yes, CAN_BUILD_32=no)
389	fi
390	AC_MSG_RESULT($CAN_BUILD_32)
391	if test "$CAN_BUILD_32" = yes; then
392	AC_MSG_CHECKING([whether runnable 32-bit binaries are being built ])
393	AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void)8==32)?0:1;}])],
394	BITS_RUN_32=yes, BITS_RUN_32=no, BITS_RUN_32=unknown)
395	AC_MSG_RESULT($BITS_RUN_32);
396	CFLAGS_32="${CFLAGS}"
397	CXXFLAGS_32="${CXXFLAGS}"
398	LDFLAGS_32="${LDFLAGS}"
399	ARFLAGS_32="${ARFLAGS}"
400	fi
401	# put it back.
402	CFLAGS="${CFLAGS_OLD}"
403	CXXFLAGS="${CXXFLAGS_OLD}"
404	LDFLAGS="${LDFLAGS_OLD}"
405	ARFLAGS="${ARFLAGS_OLD}"
406	fi
407
408	##
409	# OK. Now, we've tested for 32 and 64 bitness. Let's see what we'll do.
410	#
411
412	# First, implement 64else32
413	if test "$BITS_REQ" = "64else32"; then
414	if test "$BITS_RUN_64" = "yes"; then
415	BITS_REQ=64
416	else
417	# no changes.
418	BITS_OK=yes
419	fi
420	fi
421
422	# implement.
423	if test "$BITS_REQ" = "32" -a "$BITS_RUN_32" = "yes"; then
424	CFLAGS="${CFLAGS_32}"
425	CXXFLAGS="${CXXFLAGS_32}"
426	LDFLAGS="${LDFLAGS_32}"
427	ARFLAGS="${ARFLAGS_32}"
428	BITS_OK=yes
429	elif test "$BITS_REQ" = "64" -a "$BITS_RUN_64" = "yes"; then
430	CFLAGS="${CFLAGS_64}"
431	CXXFLAGS="${CXXFLAGS_64}"
432	LDFLAGS="${LDFLAGS_64}"
433	ARFLAGS="${ARFLAGS_64}"
434	BITS_OK=yes
435	elif test "$BITS_OK" != "yes"; then
436	AC_MSG_ERROR([Requested $BITS_REQ bit binaries but could not compile and execute them. See readme.html for help with cross compilation., and set compiler options manually.])
437	fi
438	fi
439	])
440
441	# Strict compilation options.
442	AC_DEFUN([AC_CHECK_STRICT_COMPILE],
443	[
444	AC_MSG_CHECKING([whether strict compiling is on])
445	AC_ARG_ENABLE(strict,[ --enable-strict compile with strict compiler options [default=yes]], [
446	if test "$enableval" = no
447	then
448	ac_use_strict_options=no
449	else
450	ac_use_strict_options=yes
451	fi
452	], [ac_use_strict_options=yes])
453	AC_MSG_RESULT($ac_use_strict_options)
454
455	if test "$ac_use_strict_options" = yes
456	then
457	if test "$GCC" = yes
458	then
459	case "${host}" in
460	--solaris*)
461	# Don't use -std=c99 option on Solaris/GCC
462	;;
463	*)
464	# Do not use -ansi. It limits us to C90, and it breaks some platforms.
465	# We use -std=c99 to disable the gnu99 defaults and its associated warnings
466	CFLAGS="$CFLAGS -std=c99"
467	;;
468	esac
469
470	CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
471	else
472	case "${host}" in
473	--cygwin)
474	if test "`$CC /help 2>&1 \| head -c9`" = "Microsoft"
475	then
476	CFLAGS="$CFLAGS /W4"
477	fi
478	esac
479	fi
480	if test "$GXX" = yes
481	then
482	CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
483	else
484	case "${host}" in
485	--cygwin)
486	if test "`$CXX /help 2>&1 \| head -c9`" = "Microsoft"
487	then
488	CXXFLAGS="$CXXFLAGS /W4"
489	fi
490	esac
491	fi
492	fi
493	])
494
495