source/acinclude.m4

   1 # Copyright (C) 2016 and later: Unicode, Inc. and others.
   2 # License & terms of use: http://www.unicode.org/copyright.html
   3 # Copyright (c) 1999-2016, International Business Machines Corporation and
   4 # others. All Rights Reserved.
   5 # acinclude.m4 for ICU
   6 # Don't edit aclocal.m4, do edit acinclude.m4
   7 # Stephen F. Booth
   8
   9 # @TOP@
  10
  11 # ICU_CHECK_MH_FRAG
  12 AC_DEFUN([ICU_CHECK_MH_FRAG], [
  13         AC_CACHE_CHECK(
  14                 [which Makefile fragment to use for ${host}],
  15                 [icu_cv_host_frag],
  16                 [
  17 case "${host}" in
  18 *-*-solaris*)
  19         if test "$GCC" = yes; then
  20                 icu_cv_host_frag=mh-solaris-gcc
  21         else
  22                 icu_cv_host_frag=mh-solaris
  23         fi ;;
  24 alpha*-*-linux-gnu)
  25         if test "$GCC" = yes; then
  26                 icu_cv_host_frag=mh-alpha-linux-gcc
  27         else
  28                 icu_cv_host_frag=mh-alpha-linux-cc
  29         fi ;;
  30 powerpc*-*-linux*)
  31         if test "$GCC" = yes; then
  32                 icu_cv_host_frag=mh-linux
  33         else
  34                 icu_cv_host_frag=mh-linux-va
  35         fi ;;
  36 *-*-linux*|*-*-gnu|*-*-k*bsd*-gnu|*-*-kopensolaris*-gnu) icu_cv_host_frag=mh-linux ;;
  37 i[[34567]]86-*-cygwin)
  38         if test "$GCC" = yes; then
  39                 icu_cv_host_frag=mh-cygwin
  40         else
  41                 icu_cv_host_frag=mh-cygwin-msvc
  42         fi ;;
  43 x86_64-*-cygwin)
  44         if test "$GCC" = yes; then
  45                 icu_cv_host_frag=mh-cygwin64
  46         else
  47                 icu_cv_host_frag=mh-cygwin-msvc
  48         fi ;;
  49 *-*-mingw*)
  50         if test "$GCC" = yes; then
  51                 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  52 #ifndef __MINGW64__
  53 #error This is not MinGW64
  54 #endif]])],                        [icu_cv_host_frag=mh-mingw64],
  55                                    [icu_cv_host_frag=mh-mingw])
  56         else
  57                 case "${host}" in
  58                 *-*-mingw*) icu_cv_host_frag=mh-msys-msvc ;;
  59                 *-*-cygwin) icu_cv_host_frag=mh-cygwin-msvc ;;
  60                 esac
  61         fi ;;
  62 *-*-*bsd*|*-*-dragonfly*)       icu_cv_host_frag=mh-bsd-gcc ;;
  63 *-*-aix*)
  64         if test "$GCC" = yes; then
  65                 icu_cv_host_frag=mh-aix-gcc
  66         else
  67                 icu_cv_host_frag=mh-aix-va
  68         fi ;;
  69 *-*-hpux*)
  70         if test "$GCC" = yes; then
  71                 icu_cv_host_frag=mh-hpux-gcc
  72         else
  73                 case "$CXX" in
  74                 *aCC)    icu_cv_host_frag=mh-hpux-acc ;;
  75                 esac
  76         fi ;;
  77 *-*ibm-openedition*|*-*-os390*) icu_cv_host_frag=mh-os390 ;;
  78 *-*-os400*)     icu_cv_host_frag=mh-os400 ;;
  79 *-apple-rhapsody*)      icu_cv_host_frag=mh-darwin ;;
  80 *-apple-darwin*)        icu_cv_host_frag=mh-darwin ;;
  81 *-*-beos)       icu_cv_host_frag=mh-beos ;;
  82 *-*-haiku)      icu_cv_host_frag=mh-haiku ;;
  83 *-*-irix*)      icu_cv_host_frag=mh-irix ;;
  84 *-dec-osf*) icu_cv_host_frag=mh-alpha-osf ;;
  85 *-*-nto*)       icu_cv_host_frag=mh-qnx ;;
  86 *-ncr-*)        icu_cv_host_frag=mh-mpras ;;
  87 *)              icu_cv_host_frag=mh-unknown ;;
  88 esac
  89                 ]
  90         )
  91 ])
  92
  93 # ICU_PROG_LINK - Make sure that the linker is usable
  94 AC_DEFUN([ICU_PROG_LINK],
  95 [
  96 case "${host}" in
  97     *-*-cygwin*|*-*-mingw*)
  98         if test "$GCC" != yes && test -n "`link --version 2>&1 | grep 'GNU coreutils'`"; then
  99             AC_MSG_ERROR([link.exe is not a valid linker. Your PATH is incorrect.
 100                   Please follow the directions in ICU's readme.])
 101         fi;;
 102     *);;
 103 esac])
 104
 105 # AC_SEARCH_LIBS_FIRST(FUNCTION, SEARCH-LIBS [, ACTION-IF-FOUND
 106 #            [, ACTION-IF-NOT-FOUND [, OTHER-LIBRARIES]]])
 107 # Search for a library defining FUNC, then see if it's not already available.
 108
 109 AC_DEFUN([AC_SEARCH_LIBS_FIRST],
 110 [AC_PREREQ([2.13])
 111 AC_CACHE_CHECK([for library containing $1], [ac_cv_search_$1],
 112 [ac_func_search_save_LIBS="$LIBS"
 113 ac_cv_search_$1="no"
 114 for i in $2; do
 115 LIBS="-l$i $5 $ac_func_search_save_LIBS"
 116 AC_TRY_LINK_FUNC([$1],
 117 [ac_cv_search_$1="-l$i"
 118 break])
 119 done
 120 if test "$ac_cv_search_$1" = "no"; then
 121 AC_TRY_LINK_FUNC([$1], [ac_cv_search_$1="none required"])
 122 fi
 123 LIBS="$ac_func_search_save_LIBS"])
 124 if test "$ac_cv_search_$1" != "no"; then
 125   test "$ac_cv_search_$1" = "none required" || LIBS="$ac_cv_search_$1 $LIBS"
 126   $3
 127 else :
 128   $4
 129 fi])
 130
 131
 132
 133 # Check if we can build and use 64-bit libraries
 134 AC_DEFUN([AC_CHECK_64BIT_LIBS],
 135 [
 136     BITS_REQ=nochange
 137     ENABLE_64BIT_LIBS=unknown
 138     ## revisit this for cross-compile.
 139
 140     AC_ARG_ENABLE(64bit-libs,
 141         [  --enable-64bit-libs     (deprecated, use --with-library-bits) build 64-bit libraries [default= platform default]],
 142         [echo "note, use --with-library-bits instead of --*-64bit-libs"
 143          case "${enableval}" in
 144             no|false|32) with_library_bits=32;  ;;
 145             yes|true|64) with_library_bits=64else32 ;;
 146             nochange) with_library_bits=nochange; ;;
 147             *) AC_MSG_ERROR(bad value ${enableval} for '--*-64bit-libs') ;;
 148             esac]    )
 149
 150
 151     AC_ARG_WITH(library-bits,
 152         [  --with-library-bits=bits specify how many bits to use for the library (32, 64, 64else32, nochange) [default=nochange]],
 153         [case "${withval}" in
 154             ""|nochange) BITS_REQ=$withval ;;
 155             32|64|64else32) BITS_REQ=$withval ;;
 156             *) AC_MSG_ERROR(bad value ${withval} for --with-library-bits) ;;
 157             esac])
 158
 159     # don't use these for cross compiling
 160     if test "$cross_compiling" = "yes" -a "${BITS_REQ}" != "nochange"; then
 161         AC_MSG_ERROR([Don't specify bitness when cross compiling. See readme.html for help with cross compilation., and set compiler options manually.])
 162     fi
 163     AC_CHECK_SIZEOF([void *])
 164     AC_MSG_CHECKING([whether runnable 64 bit binaries are built by default])
 165     case $ac_cv_sizeof_void_p in
 166         8) DEFAULT_64BIT=yes ;;
 167         4) DEFAULT_64BIT=no ;;
 168         *) DEFAULT_64BIT=unknown
 169     esac
 170     BITS_GOT=unknown
 171
 172     # 'OK' here means, we can exit any further checking, everything's copa
 173     BITS_OK=yes
 174
 175     # do we need to check for buildable/runnable 32 or 64 bit?
 176     BITS_CHECK_32=no
 177     BITS_CHECK_64=no
 178
 179     # later, can we run the 32/64 bit binaries so made?
 180     BITS_RUN_32=no
 181     BITS_RUN_64=no
 182
 183     if test "$DEFAULT_64BIT" = "yes"; then
 184         # we get 64 bits by default.
 185         BITS_GOT=64
 186         case "$BITS_REQ" in
 187             32)
 188                 # need to look for 32 bit support.
 189                 BITS_CHECK_32=yes
 190                 # not copa.
 191                 BITS_OK=no;;
 192             # everyone else is happy.
 193             nochange) ;;
 194             *) ;;
 195         esac
 196     elif test "$DEFAULT_64BIT" = "no"; then
 197         # not 64 bit by default.
 198         BITS_GOT=32
 199         case "$BITS_REQ" in
 200             64|64else32)
 201                 BITS_CHECK_64=yes
 202                 #BITS_CHECK_32=yes
 203                 BITS_OK=no;;
 204             nochange) ;;
 205             *) ;;
 206         esac
 207     elif test "$DEFAULT_64BIT" = "unknown"; then
 208         # cross compiling.
 209         BITS_GOT=unknown
 210         case "$BITS_REQ" in
 211             64|64else32) BITS_OK=no
 212             BITS_CHECK_32=yes
 213             BITS_CHECK_64=yes ;;
 214             32) BITS_OK=no;;
 215             nochange) ;;
 216             *) ;;
 217         esac
 218     fi
 219
 220     AC_MSG_RESULT($DEFAULT_64BIT);
 221
 222     if test "$BITS_OK" != "yes"; then
 223         # not copa. back these up.
 224         CFLAGS_OLD="${CFLAGS}"
 225         CXXFLAGS_OLD="${CXXFLAGS}"
 226         LDFLAGS_OLD="${LDFLAGS}"
 227         ARFLAGS_OLD="${ARFLAGS}"
 228
 229         CFLAGS_32="${CFLAGS}"
 230         CXXFLAGS_32="${CXXFLAGS}"
 231         LDFLAGS_32="${LDFLAGS}"
 232         ARFLAGS_32="${ARFLAGS}"
 233
 234         CFLAGS_64="${CFLAGS}"
 235         CXXFLAGS_64="${CXXFLAGS}"
 236         LDFLAGS_64="${LDFLAGS}"
 237         ARFLAGS_64="${ARFLAGS}"
 238
 239         CAN_BUILD_64=unknown
 240         CAN_BUILD_32=unknown
 241         # These results can't be cached because is sets compiler flags.
 242         if test "$BITS_CHECK_64" = "yes"; then
 243             AC_MSG_CHECKING([how to build 64-bit executables])
 244             CAN_BUILD_64=no
 245             ####
 246             # Find out if we think we can *build* for 64 bit. Doesn't check whether we can run it.
 247             #  Note, we don't have to actually check if the options work- we'll try them before using them.
 248             #  So, only try actually testing the options, if you are trying to decide between multiple options.
 249             # On exit from the following clauses:
 250             # if CAN_BUILD_64=yes:
 251             #    *FLAGS are assumed to contain the right settings for 64bit
 252             # else if CAN_BUILD_64=no: (default)
 253             #    *FLAGS are assumed to be trashed, and will be reset from *FLAGS_OLD
 254
 255             if test "$GCC" = yes; then
 256                 CFLAGS="${CFLAGS} -m64"
 257                 CXXFLAGS="${CXXFLAGS} -m64"
 258                 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 259                    CAN_BUILD_64=yes, CAN_BUILD_64=no)
 260             else
 261                 case "${host}" in
 262                 sparc*-*-solaris*)
 263                     # 1. try -m64
 264                     CFLAGS="${CFLAGS} -m64"
 265                     CXXFLAGS="${CXXFLAGS} -m64"
 266                     AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 267                        CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
 268                     if test "$CAN_BUILD_64" != yes; then
 269                         # Nope. back out changes.
 270                         CFLAGS="${CFLAGS_OLD}"
 271                         CXXFLAGS="${CXXFLAGS_OLD}"
 272                         # 2. try xarch=v9 [deprecated]
 273                         ## TODO: cross compile: the following won't work.
 274                         SPARCV9=`isainfo -n 2>&1 | grep sparcv9`
 275                         SOL64=`$CXX -xarch=v9 2>&1 && $CC -xarch=v9 2>&1 | grep -v usage:`
 276                         # "Warning: -xarch=v9 is deprecated, use -m64 to create 64-bit programs"
 277                         if test -z "$SOL64" && test -n "$SPARCV9"; then
 278                             CFLAGS="${CFLAGS} -xtarget=ultra -xarch=v9"
 279                             CXXFLAGS="${CXXFLAGS} -xtarget=ultra -xarch=v9"
 280                             LDFLAGS="${LDFLAGS} -xtarget=ultra -xarch=v9"
 281                             CAN_BUILD_64=yes
 282                         fi
 283                     fi
 284                     ;;
 285                 i386-*-solaris*)
 286                     # 1. try -m64
 287                     CFLAGS="${CFLAGS} -m64"
 288                     CXXFLAGS="${CXXFLAGS} -m64"
 289                     AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 290                        CAN_BUILD_64=yes, CAN_BUILD_64=no, CAN_BUILD_64=unknown)
 291                     if test "$CAN_BUILD_64" != yes; then
 292                         # Nope. back out changes.
 293                         CFLAGS="${CFLAGS_OLD}"
 294                         CXXFLAGS="${CXXFLAGS_OLD}"
 295                         # 2. try the older compiler option
 296                         ## TODO: cross compile problem
 297                         AMD64=`isainfo -n 2>&1 | grep amd64`
 298                         SOL64=`$CXX -xtarget=generic64 2>&1 && $CC -xtarget=generic64 2>&1 | grep -v usage:`
 299                         if test -z "$SOL64" && test -n "$AMD64"; then
 300                             CFLAGS="${CFLAGS} -xtarget=generic64"
 301                             CXXFLAGS="${CXXFLAGS} -xtarget=generic64"
 302                             CAN_BUILD_64=yes
 303                         fi
 304                     fi
 305                     ;;
 306                 ia64-*-linux*)
 307                     # check for ecc/ecpc compiler support
 308                     ## TODO: cross compiler problem
 309                     if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 | grep -v Intel`"; then
 310                         if test -n "`$CXX --help 2>&1 && $CC --help 2>&1 | grep -v Itanium`"; then
 311                             CAN_BUILD_64=yes
 312                         fi
 313                     fi
 314                     ;;
 315                 *-*-cygwin)
 316                     # vcvarsamd64.bat should have been used to enable 64-bit builds.
 317                     # We only do this check to display the correct answer.
 318                     ## TODO: cross compiler problem
 319                     if test -n "`$CXX -help 2>&1 | grep 'for x64'`"; then
 320                         CAN_BUILD_64=yes
 321                     fi
 322                     ;;
 323                 *-*-aix*|powerpc64-*-linux*)
 324                     CFLAGS="${CFLAGS} -q64"
 325                     CXXFLAGS="${CXXFLAGS} -q64"
 326                     LDFLAGS="${LDFLAGS} -q64"
 327                     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 328                        CAN_BUILD_64=yes, CAN_BUILD_64=no)
 329                     if test "$CAN_BUILD_64" = yes; then
 330                         # worked- set other options.
 331                         case "${host}" in
 332                         *-*-aix*)
 333                             # tell AIX what executable mode to use.
 334                             ARFLAGS="${ARFLAGS} -X64"
 335                         esac
 336                     fi
 337                     ;;
 338                 *-*-hpux*)
 339                     # First we try the newer +DD64, if that doesn't work,
 340                     # try other options.
 341
 342                     CFLAGS="${CFLAGS} +DD64"
 343                     CXXFLAGS="${CXXFLAGS} +DD64"
 344                     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 345                         CAN_BUILD_64=yes, CAN_BUILD_64=no)
 346                     if test "$CAN_BUILD_64" != yes; then
 347                         # reset
 348                         CFLAGS="${CFLAGS_OLD}"
 349                         CXXFLAGS="${CXXFLAGS_OLD}"
 350                         # append
 351                         CFLAGS="${CFLAGS} +DA2.0W"
 352                         CXXFLAGS="${CXXFLAGS} +DA2.0W"
 353                         AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 354                             CAN_BUILD_64=yes, CAN_BUILD_64=no)
 355                     fi
 356                     ;;
 357                 *-*ibm-openedition*|*-*-os390*)
 358                     CFLAGS="${CFLAGS} -Wc,lp64"
 359                     CXXFLAGS="${CXXFLAGS} -Wc,lp64"
 360                     LDFLAGS="${LDFLAGS} -Wl,lp64"
 361                     AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 362                        CAN_BUILD_64=yes, CAN_BUILD_64=no)
 363                     ;;
 364                 *)
 365                     # unknown platform.
 366                     ;;
 367                 esac
 368             fi
 369             AC_MSG_RESULT($CAN_BUILD_64)
 370             if test "$CAN_BUILD_64" = yes; then
 371                 AC_MSG_CHECKING([whether runnable 64-bit binaries are being built ])
 372                 AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==64)?0:1;}])],
 373                    BITS_RUN_64=yes, BITS_RUN_64=no, BITS_RUN_64=unknown)
 374                 AC_MSG_RESULT($BITS_RUN_64);
 375
 376                 CFLAGS_64="${CFLAGS}"
 377                 CXXFLAGS_64="${CXXFLAGS}"
 378                 LDFLAGS_64="${LDFLAGS}"
 379                 ARFLAGS_64="${ARFLAGS}"
 380             fi
 381             # put it back.
 382             CFLAGS="${CFLAGS_OLD}"
 383             CXXFLAGS="${CXXFLAGS_OLD}"
 384             LDFLAGS="${LDFLAGS_OLD}"
 385             ARFLAGS="${ARFLAGS_OLD}"
 386         fi
 387         if test "$BITS_CHECK_32" = "yes"; then
 388             # see comment under 'if BITS_CHECK_64', above.
 389             AC_MSG_CHECKING([how to build 32-bit executables])
 390             if test "$GCC" = yes; then
 391                 CFLAGS="${CFLAGS} -m32"
 392                 CXXFLAGS="${CXXFLAGS} -m32"
 393                 AC_COMPILE_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==32)?0:1;}])],
 394                    CAN_BUILD_32=yes, CAN_BUILD_32=no)
 395             fi
 396             AC_MSG_RESULT($CAN_BUILD_32)
 397             if test "$CAN_BUILD_32" = yes; then
 398                 AC_MSG_CHECKING([whether runnable 32-bit binaries are being built ])
 399                 AC_RUN_IFELSE([AC_LANG_SOURCE([int main(void) {return (sizeof(void*)*8==32)?0:1;}])],
 400                    BITS_RUN_32=yes, BITS_RUN_32=no, BITS_RUN_32=unknown)
 401                 AC_MSG_RESULT($BITS_RUN_32);
 402                 CFLAGS_32="${CFLAGS}"
 403                 CXXFLAGS_32="${CXXFLAGS}"
 404                 LDFLAGS_32="${LDFLAGS}"
 405                 ARFLAGS_32="${ARFLAGS}"
 406             fi
 407             # put it back.
 408             CFLAGS="${CFLAGS_OLD}"
 409             CXXFLAGS="${CXXFLAGS_OLD}"
 410             LDFLAGS="${LDFLAGS_OLD}"
 411             ARFLAGS="${ARFLAGS_OLD}"
 412         fi
 413
 414         ##
 415         # OK. Now, we've tested for 32 and 64 bitness. Let's see what we'll do.
 416         #
 417
 418         # First, implement 64else32
 419         if test "$BITS_REQ" = "64else32"; then
 420             if test "$BITS_RUN_64" = "yes"; then
 421                 BITS_REQ=64
 422             else
 423                 # no changes.
 424                 BITS_OK=yes
 425             fi
 426         fi
 427
 428         # implement.
 429         if test "$BITS_REQ" = "32" -a "$BITS_RUN_32" = "yes"; then
 430             CFLAGS="${CFLAGS_32}"
 431             CXXFLAGS="${CXXFLAGS_32}"
 432             LDFLAGS="${LDFLAGS_32}"
 433             ARFLAGS="${ARFLAGS_32}"
 434             BITS_OK=yes
 435         elif test "$BITS_REQ" = "64" -a "$BITS_RUN_64" = "yes"; then
 436             CFLAGS="${CFLAGS_64}"
 437             CXXFLAGS="${CXXFLAGS_64}"
 438             LDFLAGS="${LDFLAGS_64}"
 439             ARFLAGS="${ARFLAGS_64}"
 440             BITS_OK=yes
 441         elif test "$BITS_OK" != "yes"; then
 442             AC_MSG_ERROR([Requested $BITS_REQ bit binaries but could not compile and execute them. See readme.html for help with cross compilation., and set compiler options manually.])
 443         fi
 444      fi
 445 ])
 446
 447 # Strict compilation options.
 448 AC_DEFUN([AC_CHECK_STRICT_COMPILE],
 449 [
 450     AC_MSG_CHECKING([whether strict compiling is on])
 451     AC_ARG_ENABLE(strict,[  --enable-strict         compile with strict compiler options [default=yes]], [
 452         if test "$enableval" = no
 453         then
 454             ac_use_strict_options=no
 455         else
 456             ac_use_strict_options=yes
 457         fi
 458       ], [ac_use_strict_options=yes])
 459     AC_MSG_RESULT($ac_use_strict_options)
 460
 461     if test "$ac_use_strict_options" = yes
 462     then
 463         if test "$GCC" = yes
 464         then
 465             case "${host}" in
 466             *-*-solaris*)
 467                 # Don't use -std=c99 on Solaris because of timezone check fails
 468                 ;;
 469             *)
 470                 # Do not use -ansi. It limits us to C90, and it breaks some platforms.
 471                 # We use -std=c99 to disable the gnu99 defaults and its associated warnings
 472                 CFLAGS="$CFLAGS -std=c99"
 473                 ;;
 474             esac
 475
 476             CFLAGS="$CFLAGS -Wall -pedantic -Wshadow -Wpointer-arith -Wmissing-prototypes -Wwrite-strings"
 477         else
 478             case "${host}" in
 479             *-*-cygwin)
 480                 if test "`$CC /help 2>&1 | head -c9`" = "Microsoft"
 481                 then
 482                     CFLAGS="$CFLAGS /W4"
 483                 fi ;;
 484             *-*-mingw*)
 485                 CFLAGS="$CFLAGS -W4" ;;
 486             esac
 487         fi
 488         if test "$GXX" = yes
 489         then
 490             CXXFLAGS="$CXXFLAGS -W -Wall -pedantic -Wpointer-arith -Wwrite-strings -Wno-long-long"
 491         else
 492             case "${host}" in
 493             *-*-cygwin)
 494                 if test "`$CXX /help 2>&1 | head -c9`" = "Microsoft"
 495                 then
 496                     CXXFLAGS="$CXXFLAGS /W4"
 497                 fi ;;
 498             *-*-mingw*)
 499                 CFLAGS="$CFLAGS -W4" ;;
 500             esac
 501         fi
 502     fi
 503 ])
 504
 505