libiberty/configure.ac

   1 dnl Process this file with autoconf to produce a configure script
   2
   3 AC_PREREQ(2.59)
   4 AC_INIT
   5 AC_CONFIG_SRCDIR([xmalloc.c])
   6
   7 # This works around the fact that libtool configuration may change LD
   8 # for this particular configuration, but some shells, instead of
   9 # keeping the changes in LD private, export them just because LD is
  10 # exported.  We don't use libtool yet, but some day we might, so...
  11 ORIGINAL_LD_FOR_MULTILIBS=$LD
  12
  13 dnl We use these options to decide which functions to include.
  14 AC_ARG_WITH(target-subdir,
  15 [  --with-target-subdir=SUBDIR      Configuring in a subdirectory for target])
  16 AC_ARG_WITH(build-subdir,
  17 [  --with-build-subdir=SUBDIR       Configuring in a subdirectory for build])
  18 AC_ARG_WITH(cross-host,
  19 [  --with-cross-host=HOST           Configuring with a cross compiler])
  20 AC_ARG_WITH(newlib,
  21 [  --with-newlib                    Configuring with newlib])
  22
  23 if test "${srcdir}" = "."; then
  24   if test -n "${with_build_subdir}"; then
  25     libiberty_topdir="${srcdir}/../.."
  26     with_target_subdir=
  27   elif test -z "${with_target_subdir}"; then
  28     libiberty_topdir="${srcdir}/.."
  29   else
  30     if test "${with_target_subdir}" != "."; then
  31       libiberty_topdir="${srcdir}/${with_multisrctop}../.."
  32     else
  33       libiberty_topdir="${srcdir}/${with_multisrctop}.."
  34     fi
  35   fi
  36 else
  37   libiberty_topdir="${srcdir}/.."
  38 fi
  39 AC_SUBST(libiberty_topdir)
  40 AC_CONFIG_AUX_DIR($libiberty_topdir)
  41
  42 dnl Very limited version of automake's enable-maintainer-mode
  43
  44 AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
  45   dnl maintainer-mode is disabled by default
  46   AC_ARG_ENABLE(maintainer-mode,
  47 [  --enable-maintainer-mode
  48                           enable make rules and dependencies not useful
  49                           (and sometimes confusing) to the casual installer],
  50       maintainer_mode=$enableval,
  51       maintainer_mode=no)
  52
  53 AC_MSG_RESULT($maintainer_mode)
  54
  55 if test "$maintainer_mode" = "yes"; then
  56   MAINT=''
  57   NOTMAINT='#'
  58 else
  59   MAINT='#'
  60   NOTMAINT=''
  61 fi
  62 AC_SUBST(MAINT)dnl
  63 AC_SUBST(NOTMAINT)dnl
  64
  65 # Do we have a single-tree copy of texinfo?  Even if we do, we can't
  66 # rely on it - libiberty is built before texinfo.
  67 AC_CHECK_PROG(MAKEINFO, makeinfo, makeinfo, )
  68 if test "x$MAKEINFO" = "x"; then
  69     MAKEINFO="@echo makeinfo missing; true"
  70     BUILD_INFO=
  71 else
  72     BUILD_INFO=info
  73     case "$MAKEINFO" in
  74       */missing\ makeinfo*)
  75         BUILD_INFO=
  76         AC_MSG_WARN([
  77 *** Makeinfo is missing. Info documentation will not be built.])
  78         ;;
  79       *)
  80         case x"`$MAKEINFO --version | grep 'GNU texinfo'`" in
  81           x*\ [[1-3]].* )
  82             MAKEINFO="@echo $MAKEINFO is too old, 4.0 or newer required; true"
  83             BUILD_INFO=
  84             AC_MSG_WARN([
  85 *** Makeinfo is too old. Info documentation will not be built.])
  86           ;;
  87         esac
  88         ;;
  89     esac
  90 fi
  91 AC_SUBST(MAKEINFO)
  92 AC_SUBST(BUILD_INFO)
  93
  94 AC_CHECK_PROG(PERL, perl, perl, )
  95 if test x"$PERL" = x""; then
  96   HAVE_PERL='#'
  97 else
  98   HAVE_PERL=''
  99 fi
 100 AC_SUBST(HAVE_PERL)
 101
 102 AC_CANONICAL_HOST
 103
 104 dnl When we start using automake:
 105 dnl AM_INIT_AUTOMAKE(libiberty, 1.0)
 106
 107 dnl These must be called before AM_PROG_LIBTOOL, because it may want
 108 dnl to call AC_CHECK_PROG.
 109 AC_CHECK_TOOL(AR, ar)
 110 AC_CHECK_TOOL(RANLIB, ranlib, :)
 111
 112 dnl When switching to automake, replace the following with AM_ENABLE_MULTILIB.
 113 # Add --enable-multilib to configure.
 114 # Default to --enable-multilib
 115 AC_ARG_ENABLE(multilib,
 116 [  --enable-multilib       build many library versions (default)],
 117 [case "$enableval" in
 118   yes) multilib=yes ;;
 119   no)  multilib=no ;;
 120   *)   AC_MSG_ERROR([bad value $enableval for multilib option]) ;;
 121  esac],
 122               [multilib=yes])
 123
 124 # Even if the default multilib is not a cross compilation,
 125 # it may be that some of the other multilibs are.
 126 if test $cross_compiling = no && test $multilib = yes \
 127    && test "x${with_multisubdir}" != x ; then
 128    cross_compiling=maybe
 129 fi
 130
 131 GCC_NO_EXECUTABLES
 132 AC_PROG_CC
 133 AC_PROG_CPP_WERROR
 134
 135 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wc++-compat \
 136                           -Wstrict-prototypes], [ac_libiberty_warn_cflags])
 137 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([], [ac_libiberty_warn_cflags])
 138
 139 AC_PROG_CC_C_O
 140 # autoconf is lame and doesn't give us any substitution variable for this.
 141 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
 142   NO_MINUS_C_MINUS_O=yes
 143 else
 144   OUTPUT_OPTION='-o $@'
 145 fi
 146 AC_SUBST(NO_MINUS_C_MINUS_O)
 147 AC_SUBST(OUTPUT_OPTION)
 148
 149 AC_C_CONST
 150 AC_C_INLINE
 151 AC_C_BIGENDIAN
 152
 153 dnl When we start using libtool:
 154 dnl Default to a non shared library.  This may be overridden by the
 155 dnl configure option --enable-shared.
 156 dnl AM_DISABLE_SHARED
 157
 158 dnl When we start using libtool:
 159 dnl AM_PROG_LIBTOOL
 160
 161 dnl When we start using automake:
 162 dnl AM_CONFIG_HEADER(config.h:config.in)
 163 AC_CONFIG_HEADER(config.h:config.in)
 164
 165 dnl When we start using automake:
 166 dnl AM_MAINTAINER_MODE
 167 dnl AC_EXEEXT
 168
 169 dnl When we start using automake:
 170 dnl AM_PROG_INSTALL
 171 AC_PROG_INSTALL
 172
 173 # Don't build the shared library for build.
 174 if [[ -n "${with_build_subdir}" ]]; then
 175   enable_shared=no
 176 fi
 177
 178 frag=
 179 case "${host}" in
 180   rs6000-ibm-aix3.1 | rs6000-ibm-aix)
 181                         frag=mh-aix ;;
 182   *-*-cxux7*)           frag=mh-cxux7 ;;
 183   *-*-freebsd2.1.*)     frag=mh-fbsd21 ;;
 184   *-*-freebsd2.2.[[012]])       frag=mh-fbsd21 ;;
 185   i370-*-opened*)       frag=mh-openedition ;;
 186   i[[34567]]86-*-windows*)      frag=mh-windows ;;
 187 esac
 188
 189 if [[ -n "${frag}" ]]; then
 190   frags=${libiberty_topdir}/libiberty/config/$frag
 191 else
 192   frags=
 193 fi
 194
 195 # If they didn't specify --enable-shared, don't generate shared libs.
 196 case "${enable_shared}" in
 197   yes) shared=yes ;;
 198   no) shared=no ;;
 199   "") shared=no ;;
 200   *) shared=yes ;;
 201 esac
 202 if [[ "${shared}" = "yes" ]]; then
 203   frag=
 204   case "${host}" in
 205     *-*-cygwin*)        ;;
 206     alpha*-*-linux*)    frag=mh-elfalphapic ;;
 207     arm*-*-*)           frag=mh-armpic ;;
 208     hppa*-*-*)          frag=mh-papic ;;
 209     i[[34567]]86-*-* | x86_64-*-*)
 210                         frag=mh-x86pic ;;
 211     powerpc*-*-aix*)    ;;
 212     powerpc*-*-*)       frag=mh-ppcpic ;;
 213     sparc*-*-*)         frag=mh-sparcpic ;;
 214     s390*-*-*)          frag=mh-s390pic ;;
 215     *)                  frag=mh-${host_cpu}pic ;;
 216   esac
 217   if [[ -n "${frag}" ]]; then
 218     frags="${frags} ${libiberty_topdir}/config/${frag}"
 219   fi
 220 fi
 221
 222 echo "# Warning: this fragment is automatically generated" > temp-frag
 223
 224 for frag in ${frags}; do
 225   if [[ -f ${frag} ]]; then
 226     echo "Appending ${frag} to xhost-mkfrag"
 227     echo "# Following fragment copied from ${frag}" >> temp-frag
 228     cat ${frag} >> temp-frag
 229   fi
 230 done
 231
 232 # record if we want to build shared libs.
 233 if [[ "${shared}" = "yes" ]]; then
 234   echo enable_shared = yes >> temp-frag
 235 else
 236   echo enable_shared = no >> temp-frag
 237 fi
 238
 239 frag=xhost-mkfrag
 240 ${CONFIG_SHELL-/bin/sh} ${libiberty_topdir}/move-if-change temp-frag xhost-mkfrag
 241
 242 host_makefile_frag=${frag}
 243 AC_SUBST_FILE(host_makefile_frag)
 244
 245 # It's OK to check for header files.  Although the compiler may not be
 246 # able to link anything, it had better be able to at least compile
 247 # something.
 248 AC_CHECK_HEADERS(sys/file.h sys/param.h limits.h stdlib.h malloc.h string.h unistd.h strings.h sys/time.h time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h alloca.h sys/pstat.h sys/sysmp.h sys/sysinfo.h machine/hal_sysinfo.h sys/table.h sys/sysctl.h sys/systemcfg.h stdint.h stdio_ext.h)
 249 AC_HEADER_SYS_WAIT
 250 AC_HEADER_TIME
 251
 252 libiberty_AC_DECLARE_ERRNO
 253
 254 # Determine the size of an int for struct fibnode.
 255 AC_CHECK_SIZEOF([int])
 256
 257 AC_CHECK_TYPE(uintptr_t, unsigned long)
 258
 259 # Look for a 64-bit type.
 260 AC_MSG_CHECKING([for a 64-bit type])
 261 AC_CACHE_VAL(liberty_cv_uint64,
 262 [AC_TRY_COMPILE(
 263 [#ifdef HAVE_STDINT_H
 264 #include <stdint.h>
 265 #endif],
 266 [extern uint64_t foo;],
 267 liberty_cv_uint64=uint64_t,
 268 [AC_TRY_COMPILE(
 269 [#ifdef HAVE_LIMITS_H
 270 #include <limits.h>
 271 #endif
 272 #ifndef CHAR_BIT
 273 #define CHAR_BIT 8
 274 #endif],
 275 [extern char foo[sizeof(long) * CHAR_BIT >= 64 ? 1 : -1];],
 276 liberty_cv_uint64="unsigned long",
 277 [AC_TRY_COMPILE(
 278 [#ifdef HAVE_LIMITS_H
 279 #include <limits.h>
 280 #endif
 281 #ifndef CHAR_BIT
 282 #define CHAR_BIT 8
 283 #endif],
 284 [extern char foo[sizeof(long long) * CHAR_BIT >= 64 ? 1 : -1];],
 285 liberty_cv_uint64="unsigned long long", liberty_cv_uint64=none)])])])
 286 AC_MSG_RESULT($liberty_cv_uint64)
 287 if test "$liberty_cv_uint64" != none; then
 288   AC_DEFINE_UNQUOTED(UNSIGNED_64BIT_TYPE, $liberty_cv_uint64,
 289                      [Define to an unsigned 64-bit type available in the compiler.])
 290 fi
 291
 292 # Given the above check, we always have uintptr_t or a fallback
 293 # definition.  So define HAVE_UINTPTR_T in case any imported code
 294 # relies on it.
 295 AC_DEFINE(HAVE_UINTPTR_T, 1, [Define if you have the \`uintptr_t' type.])
 296
 297 AC_TYPE_PID_T
 298
 299 # This is the list of functions which libiberty will provide if they
 300 # are not available on the host.
 301
 302 funcs="asprintf"
 303 funcs="$funcs atexit"
 304 funcs="$funcs basename"
 305 funcs="$funcs bcmp"
 306 funcs="$funcs bcopy"
 307 funcs="$funcs bsearch"
 308 funcs="$funcs bzero"
 309 funcs="$funcs calloc"
 310 funcs="$funcs clock"
 311 funcs="$funcs ffs"
 312 funcs="$funcs getcwd"
 313 funcs="$funcs getpagesize"
 314 funcs="$funcs gettimeofday"
 315 funcs="$funcs index"
 316 funcs="$funcs insque"
 317 funcs="$funcs memchr"
 318 funcs="$funcs memcmp"
 319 funcs="$funcs memcpy"
 320 funcs="$funcs memmove"
 321 funcs="$funcs mempcpy"
 322 funcs="$funcs memset"
 323 funcs="$funcs mkstemps"
 324 funcs="$funcs putenv"
 325 funcs="$funcs random"
 326 funcs="$funcs rename"
 327 funcs="$funcs rindex"
 328 funcs="$funcs setenv"
 329 funcs="$funcs snprintf"
 330 funcs="$funcs sigsetmask"
 331 funcs="$funcs stpcpy"
 332 funcs="$funcs stpncpy"
 333 funcs="$funcs strcasecmp"
 334 funcs="$funcs strchr"
 335 funcs="$funcs strdup"
 336 funcs="$funcs strncasecmp"
 337 funcs="$funcs strndup"
 338 funcs="$funcs strrchr"
 339 funcs="$funcs strstr"
 340 funcs="$funcs strtod"
 341 funcs="$funcs strtol"
 342 funcs="$funcs strtoul"
 343 funcs="$funcs strverscmp"
 344 funcs="$funcs tmpnam"
 345 funcs="$funcs vasprintf"
 346 funcs="$funcs vfprintf"
 347 funcs="$funcs vprintf"
 348 funcs="$funcs vsnprintf"
 349 funcs="$funcs vsprintf"
 350 funcs="$funcs waitpid"
 351
 352 # Also in the old function.def file: alloca, vfork, getopt.
 353
 354 vars="sys_errlist sys_nerr sys_siglist"
 355
 356 checkfuncs="getrusage on_exit psignal strerror strsignal sysconf times sbrk gettimeofday"
 357 checkfuncs="$checkfuncs realpath canonicalize_file_name pstat_getstatic pstat_getdynamic sysmp"
 358 checkfuncs="$checkfuncs getsysinfo table sysctl wait3 wait4 __fsetlocking"
 359
 360 # These are neither executed nor required, but they help keep
 361 # autoheader happy without adding a bunch of text to acconfig.h.
 362 if test "x" = "y"; then
 363   AC_CHECK_FUNCS(asprintf atexit basename bcmp bcopy bsearch bzero calloc clock \
 364   getcwd getpagesize gettimeofday index insque mkstemps memchr memcmp memcpy \
 365   memmove mempcpy memset putenv random rename rindex sigsetmask \
 366   strcasecmp setenv stpcpy stpncpy strchr strdup strncasecmp strndup strrchr strstr \
 367   strtod strtol strtoul strverscmp tmpnam vasprintf vfprintf vprintf \
 368   vsprintf waitpid getrusage on_exit psignal strerror strsignal \
 369   sysconf times sbrk gettimeofday ffs snprintf vsnprintf \
 370   pstat_getstatic pstat_getdynamic sysmp getsysinfo table sysctl wait3 wait4 \
 371   realpath canonicalize_file_name __fsetlocking)
 372   AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf])
 373   AC_DEFINE(HAVE_SYS_ERRLIST, 1, [Define if you have the sys_errlist variable.])
 374   AC_DEFINE(HAVE_SYS_NERR,    1, [Define if you have the sys_nerr variable.])
 375   AC_DEFINE(HAVE_SYS_SIGLIST, 1, [Define if you have the sys_siglist variable.])
 376 fi
 377
 378 # For each of these functions, if the host does not provide the
 379 # function we want to put FN.o in LIBOBJS, and if the host does
 380 # provide the function, we want to define HAVE_FN in config.h.
 381
 382 setobjs=
 383 CHECK=
 384 target_header_dir=
 385 if test -n "${with_target_subdir}"; then
 386
 387   # We are being configured as a target library.  AC_REPLACE_FUNCS
 388   # may not work correctly, because the compiler may not be able to
 389   # link executables.  Note that we may still be being configured
 390   # native.
 391
 392   # If we are being configured for newlib, we know which functions
 393   # newlib provide and which ones we will be expected to provide.
 394
 395   if test "x${with_newlib}" = "xyes"; then
 396     AC_LIBOBJ([asprintf])
 397     AC_LIBOBJ([basename])
 398     AC_LIBOBJ([insque])
 399     AC_LIBOBJ([random])
 400     AC_LIBOBJ([strdup])
 401     AC_LIBOBJ([vasprintf])
 402
 403     for f in $funcs; do
 404       case "$f" in
 405         asprintf | basename | insque | random | strdup | vasprintf)
 406           ;;
 407         *)
 408           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 409           AC_DEFINE_UNQUOTED($n)
 410           ;;
 411       esac
 412     done
 413
 414     # newlib doesnt provide any of the variables in $vars, so we
 415     # dont have to check them here.
 416
 417     # Of the functions in $checkfuncs, newlib only has strerror.
 418     AC_DEFINE(HAVE_STRERROR)
 419
 420     setobjs=yes
 421
 422   fi
 423
 424   # If we are being configured for Mingw, we know which functions
 425   # Mingw provides and which ones we will be expected to provide.
 426
 427   case "${host}" in
 428   *-*-mingw*)
 429     AC_LIBOBJ([asprintf])
 430     AC_LIBOBJ([basename])
 431     AC_LIBOBJ([bcmp])
 432     AC_LIBOBJ([bcopy])
 433     AC_LIBOBJ([bzero])
 434     AC_LIBOBJ([clock])
 435     AC_LIBOBJ([ffs])
 436     AC_LIBOBJ([getpagesize])
 437     AC_LIBOBJ([index])
 438     AC_LIBOBJ([insque])
 439     AC_LIBOBJ([mempcpy])
 440     AC_LIBOBJ([mkstemps])
 441     AC_LIBOBJ([random])
 442     AC_LIBOBJ([rindex])
 443     AC_LIBOBJ([sigsetmask])
 444     AC_LIBOBJ([stpcpy])
 445     AC_LIBOBJ([stpncpy])
 446     AC_LIBOBJ([strndup])
 447     AC_LIBOBJ([strverscmp])
 448     AC_LIBOBJ([vasprintf])
 449     AC_LIBOBJ([waitpid])
 450
 451     for f in $funcs; do
 452       case "$f" in
 453         asprintf | basename | bcmp | bcopy | bzero | clock | ffs | getpagesize | index | insque | mempcpy | mkstemps | random | rindex | sigsetmask | stpcpy | stpncpy | strdup | strndup | strverscmp | vasprintf | waitpid)
 454           ;;
 455         *)
 456           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 457           AC_DEFINE_UNQUOTED($n)
 458           ;;
 459       esac
 460     done
 461
 462     # Mingw doesnt provide any of the variables in $vars, so we
 463     # dont have to check them here.
 464
 465     # Of the functions in $checkfuncs, Mingw only has strerror.
 466     AC_DEFINE(HAVE_STRERROR)
 467
 468     setobjs=yes
 469     ;;
 470
 471   esac
 472
 473   # We may wish to install the target headers somewhere.
 474   AC_ARG_ENABLE(install-libiberty,
 475   [  --enable-install-libiberty       Install headers for end users],
 476   enable_install_libiberty=$enableval,
 477   enable_install_libiberty=no)dnl
 478
 479   # Option parsed, now set things appropriately.
 480   case x"$enable_install_libiberty" in
 481     xyes|x)
 482       target_header_dir=libiberty
 483       ;;
 484     xno)
 485       target_header_dir=
 486       ;;
 487     *)
 488       # This could be sanity-checked in various ways...
 489       target_header_dir="${enable_install_libiberty}"
 490       ;;
 491   esac
 492
 493
 494 else
 495
 496    # Not a target library, so we set things up to run the test suite.
 497    CHECK=really-check
 498
 499 fi
 500
 501 AC_SUBST(CHECK)
 502 AC_SUBST(target_header_dir)
 503
 504 case "${host}" in
 505   *-*-cygwin* | *-*-mingw*)
 506     AC_DEFINE(HAVE_SYS_ERRLIST)
 507     AC_DEFINE(HAVE_SYS_NERR)
 508     ;;
 509 esac
 510
 511 if test -z "${setobjs}"; then
 512   case "${host}" in
 513
 514   *-*-vxworks*)
 515     # Handle VxWorks configuration specially, since on VxWorks the
 516     # libraries are actually on the target board, not in the file
 517     # system.
 518     AC_LIBOBJ([basename])
 519     AC_LIBOBJ([getpagesize])
 520     AC_LIBOBJ([insque])
 521     AC_LIBOBJ([random])
 522     AC_LIBOBJ([strcasecmp])
 523     AC_LIBOBJ([strncasecmp])
 524     AC_LIBOBJ([strdup])
 525     AC_LIBOBJ([vfork])
 526     AC_LIBOBJ([waitpid])
 527     AC_LIBOBJ([vasprintf])
 528     for f in $funcs; do
 529       case "$f" in
 530         basename | getpagesize | insque | random | strcasecmp)
 531           ;;
 532         strncasecmp | strdup | vfork | waitpid | vasprintf)
 533           ;;
 534         *)
 535           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 536           AC_DEFINE_UNQUOTED($n)
 537           ;;
 538       esac
 539     done
 540
 541     # VxWorks doesn't provide any of the variables in $vars, so we
 542     # don't have to check them here.
 543
 544     # Of the functions in $checkfuncs, VxWorks only has strerror.
 545     AC_DEFINE(HAVE_STRERROR)
 546
 547     setobjs=yes
 548     ;;
 549
 550   *-*-msdosdjgpp)
 551     for f in atexit basename bcmp bcopy bsearch bzero calloc clock ffs \
 552              getcwd getpagesize getrusage gettimeofday gettimeofday \
 553              index insque memchr memcmp memcpy memmove memset psignal \
 554              putenv random rename rindex sbrk setenv stpcpy strcasecmp \
 555              strchr strdup strerror strncasecmp strrchr strstr strtod \
 556              strtol strtoul sysconf times tmpnam vfprintf vprintf \
 557              vsprintf waitpid
 558     do
 559       n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 560       AC_DEFINE_UNQUOTED($n)
 561     done
 562
 563
 564     setobjs=yes
 565     ;;
 566
 567   esac
 568 fi
 569
 570 if test -z "${setobjs}"; then
 571
 572   case "${host}" in
 573
 574   *-*-cygwin*)
 575     # The Cygwin library actually uses a couple of files from
 576     # libiberty when it is built.  If we are building a native
 577     # Cygwin, and we run the tests, we will appear to have these
 578     # files.  However, when we go on to build winsup, we will wind up
 579     # with a library which does not have the files, since they should
 580     # have come from libiberty.
 581
 582     # We handle this by removing the functions the winsup library
 583     # provides from our shell variables, so that they appear to be
 584     # missing.
 585
 586     # DJ - only if we're *building* cygwin, not just building *with* cygwin
 587
 588     if test -n "${with_target_subdir}"
 589     then
 590       funcs="`echo $funcs | sed -e 's/random//'`"
 591       AC_LIBOBJ([random])
 592       vars="`echo $vars | sed -e 's/sys_siglist//'`"
 593       checkfuncs="`echo $checkfuncs | sed -e 's/strsignal//' -e 's/psignal//'`"
 594     fi
 595     ;;
 596
 597   *-*-mingw32*)
 598     # Under mingw32, sys_nerr and sys_errlist exist, but they are
 599     # macros, so the test below won't find them.
 600     libiberty_cv_var_sys_nerr=yes
 601     libiberty_cv_var_sys_errlist=yes
 602     ;;
 603
 604   *-*-msdosdjgpp*)
 605     # vfork and fork are stubs.
 606     ac_cv_func_vfork_works=no
 607     ;;
 608
 609   *-*-uwin*)
 610     # Under some versions of uwin, vfork is notoriously buggy and the test
 611     # can hang configure; on other versions, vfork exists just as a stub.
 612     # FIXME: This should be removed once vfork in uwin's runtime is fixed.
 613     ac_cv_func_vfork_works=no
 614     # Under uwin 2.0+, sys_nerr and sys_errlist exist, but they are
 615     # macros (actually, these are imported from a DLL, but the end effect
 616     # is the same), so the test below won't find them.
 617     libiberty_cv_var_sys_nerr=yes
 618     libiberty_cv_var_sys_errlist=yes
 619     ;;
 620
 621   *-*-*vms*)
 622     # Under VMS, vfork works very different than on Unix. The standard test
 623     # won't work, and it isn't easily adaptable. It makes more sense to
 624     # just force it.
 625     ac_cv_func_vfork_works=yes
 626     ;;
 627
 628   esac
 629
 630   # We haven't set the list of objects yet.  Use the standard autoconf
 631   # tests.  This will only work if the compiler works.
 632   AC_ISC_POSIX
 633   AC_REPLACE_FUNCS($funcs)
 634   libiberty_AC_FUNC_C_ALLOCA
 635   AC_FUNC_FORK
 636   if test $ac_cv_func_vfork_works = no; then
 637     AC_LIBOBJ([vfork])
 638   fi
 639   # We only need _doprnt if we might use it to implement v*printf.
 640   if test $ac_cv_func_vprintf != yes \
 641      || test $ac_cv_func_vfprintf != yes \
 642      || test $ac_cv_func_vsprintf != yes; then
 643     AC_REPLACE_FUNCS(_doprnt)
 644   else
 645     AC_CHECK_FUNCS(_doprnt)
 646   fi
 647
 648   for v in $vars; do
 649     AC_MSG_CHECKING([for $v])
 650     AC_CACHE_VAL(libiberty_cv_var_$v,
 651       [AC_LINK_IFELSE([AC_LANG_PROGRAM([[int *p;]],[[extern int $v []; p = $v;]])],
 652                       [eval "libiberty_cv_var_$v=yes"],
 653                       [eval "libiberty_cv_var_$v=no"])])
 654     if eval "test \"`echo '$libiberty_cv_var_'$v`\" = yes"; then
 655       AC_MSG_RESULT(yes)
 656       n=HAVE_`echo $v | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 657       AC_DEFINE_UNQUOTED($n)
 658     else
 659       AC_MSG_RESULT(no)
 660     fi
 661   done
 662
 663   # special check for _system_configuration because AIX <4.3.2 do not
 664   # contain the `physmem' member.
 665   AC_MSG_CHECKING([for external symbol _system_configuration])
 666   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/systemcfg.h>]],
 667                         [[double x = _system_configuration.physmem;]])],
 668     [AC_MSG_RESULT([yes])
 669     AC_DEFINE(HAVE__SYSTEM_CONFIGURATION, 1,
 670               [Define if you have the _system_configuration variable.])],
 671     [AC_MSG_RESULT([no])])
 672
 673   AC_CHECK_FUNCS($checkfuncs)
 674   AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf])
 675   AC_CHECK_DECLS([calloc, getenv, getopt, malloc, realloc, sbrk])
 676   AC_CHECK_DECLS([strverscmp])
 677   libiberty_NEED_DECLARATION(canonicalize_file_name)
 678 fi
 679
 680 # Figure out which version of pexecute to use.
 681 case "${host}" in
 682      *-*-mingw* | *-*-winnt*)   pexecute=./pex-win32.o  ;;
 683      *-*-msdosdjgpp*)           pexecute=./pex-djgpp.o  ;;
 684      *-*-msdos*)                pexecute=./pex-msdos.o  ;;
 685      *)                         pexecute=./pex-unix.o   ;;
 686 esac
 687 AC_SUBST(pexecute)
 688
 689 libiberty_AC_FUNC_STRNCMP
 690
 691 # Install a library built with a cross compiler in $(tooldir) rather
 692 # than $(libdir).
 693 if test -z "${with_cross_host}"; then
 694   INSTALL_DEST=libdir
 695 else
 696   INSTALL_DEST=tooldir
 697 fi
 698 AC_SUBST(INSTALL_DEST)
 699
 700 m4_pattern_allow(LIBOBJS)
 701 L=""
 702 for l in x $LIBOBJS; do
 703   case $l in
 704     x) ;;
 705     *) L="$L ./$l" ;;
 706   esac
 707 done
 708 LIBOBJS="$L"
 709
 710 dnl Required by html and install-html
 711 AC_SUBST(datarootdir)
 712 AC_SUBST(docdir)
 713 AC_SUBST(htmldir)
 714
 715 # We need multilib support, but only if configuring for the target.
 716 AC_CONFIG_FILES([Makefile testsuite/Makefile])
 717 AC_CONFIG_COMMANDS([default],
 718   [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 719 if test -n "$CONFIG_FILES"; then
 720   if test -n "${with_target_subdir}"; then
 721     # FIXME: We shouldn't need to set ac_file
 722     ac_file=Makefile
 723     LD="${ORIGINAL_LD_FOR_MULTILIBS}"
 724     . ${libiberty_topdir}/config-ml.in
 725   fi
 726 fi]],
 727 [[srcdir=${srcdir}
 728 host=${host}
 729 target=${target}
 730 with_target_subdir=${with_target_subdir}
 731 with_multisubdir=${with_multisubdir}
 732 ac_configure_args="--enable-multilib ${ac_configure_args}"
 733 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 734 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
 735 libiberty_topdir=${libiberty_topdir}
 736 ]])
 737 AC_OUTPUT