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   frag=${libiberty_topdir}/libiberty/config/$frag
 191 fi
 192
 193 # If they didn't specify --enable-shared, don't generate shared libs.
 194 case "${enable_shared}" in
 195   yes) shared=yes ;;
 196   no) shared=no ;;
 197   "") shared=no ;;
 198   *) shared=yes ;;
 199 esac
 200 if [[ "${shared}" = "yes" ]]; then
 201   case "${host}" in
 202     *-*-cygwin*)        ;;
 203     alpha*-*-linux*)    PICFLAG=-fPIC ;;
 204     arm*-*-*)           PICFLAG=-fPIC ;;
 205     hppa*-*-*)          PICFLAG=-fPIC ;;
 206     i370-*-*)           PICFLAG=-fPIC ;;
 207     ia64-*-*)           PICFLAG=-fpic ;;
 208     i[[34567]]86-*-* | x86_64-*-*)
 209                         PICFLAG=-fpic ;;
 210     m68k-*-*)           PICFLAG=-fpic ;;
 211     mips*-*-linux)      PICFLAG=-fPIC ;;
 212     powerpc*-*-aix*)    ;;
 213     powerpc*-*-*)       PICFLAG=-fPIC ;;
 214     sparc*-*-*)         case "${CFLAGS}" in
 215                           *-fpic* ) PICFLAG=-fpic ;;
 216                           * ) PICFLAG=-fPIC ;;
 217                         esac ;;
 218     s390*-*-*)          PICFLAG=-fpic ;;
 219   esac
 220 fi
 221 AC_SUBST(PICFLAG)
 222
 223 echo "# Warning: this fragment is automatically generated" > temp-frag
 224
 225 if [[ -n "${frag}" ]] && [[ -f "${frag}" ]]; then
 226   echo "Appending ${frag} to xhost-mkfrag"
 227   echo "# Following fragment copied from ${frag}" >> temp-frag
 228   cat ${frag} >> temp-frag
 229 fi
 230
 231 # record if we want to build shared libs.
 232 if [[ "${shared}" = "yes" ]]; then
 233   echo enable_shared = yes >> temp-frag
 234 else
 235   echo enable_shared = no >> temp-frag
 236 fi
 237
 238 frag=xhost-mkfrag
 239 ${CONFIG_SHELL-/bin/sh} ${libiberty_topdir}/move-if-change temp-frag xhost-mkfrag
 240
 241 host_makefile_frag=${frag}
 242 AC_SUBST_FILE(host_makefile_frag)
 243
 244 # It's OK to check for header files.  Although the compiler may not be
 245 # able to link anything, it had better be able to at least compile
 246 # something.
 247 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)
 248 AC_HEADER_SYS_WAIT
 249 AC_HEADER_TIME
 250
 251 libiberty_AC_DECLARE_ERRNO
 252
 253 # Determine the size of an int for struct fibnode.
 254 AC_CHECK_SIZEOF([int])
 255
 256 AC_CHECK_TYPE(uintptr_t, unsigned long)
 257
 258 # Look for a 64-bit type.
 259 AC_MSG_CHECKING([for a 64-bit type])
 260 AC_CACHE_VAL(liberty_cv_uint64,
 261 [AC_TRY_COMPILE(
 262 [#ifdef HAVE_STDINT_H
 263 #include <stdint.h>
 264 #endif],
 265 [extern uint64_t foo;],
 266 liberty_cv_uint64=uint64_t,
 267 [AC_TRY_COMPILE(
 268 [#ifdef HAVE_LIMITS_H
 269 #include <limits.h>
 270 #endif
 271 #ifndef CHAR_BIT
 272 #define CHAR_BIT 8
 273 #endif],
 274 [extern char foo[sizeof(long) * CHAR_BIT >= 64 ? 1 : -1];],
 275 liberty_cv_uint64="unsigned long",
 276 [AC_TRY_COMPILE(
 277 [#ifdef HAVE_LIMITS_H
 278 #include <limits.h>
 279 #endif
 280 #ifndef CHAR_BIT
 281 #define CHAR_BIT 8
 282 #endif],
 283 [extern char foo[sizeof(long long) * CHAR_BIT >= 64 ? 1 : -1];],
 284 liberty_cv_uint64="unsigned long long", liberty_cv_uint64=none)])])])
 285 AC_MSG_RESULT($liberty_cv_uint64)
 286 if test "$liberty_cv_uint64" != none; then
 287   AC_DEFINE_UNQUOTED(UNSIGNED_64BIT_TYPE, $liberty_cv_uint64,
 288                      [Define to an unsigned 64-bit type available in the compiler.])
 289 fi
 290
 291 # Given the above check, we always have uintptr_t or a fallback
 292 # definition.  So define HAVE_UINTPTR_T in case any imported code
 293 # relies on it.
 294 AC_DEFINE(HAVE_UINTPTR_T, 1, [Define if you have the \`uintptr_t' type.])
 295
 296 AC_TYPE_PID_T
 297
 298 # This is the list of functions which libiberty will provide if they
 299 # are not available on the host.
 300
 301 funcs="asprintf"
 302 funcs="$funcs atexit"
 303 funcs="$funcs basename"
 304 funcs="$funcs bcmp"
 305 funcs="$funcs bcopy"
 306 funcs="$funcs bsearch"
 307 funcs="$funcs bzero"
 308 funcs="$funcs calloc"
 309 funcs="$funcs clock"
 310 funcs="$funcs ffs"
 311 funcs="$funcs getcwd"
 312 funcs="$funcs getpagesize"
 313 funcs="$funcs gettimeofday"
 314 funcs="$funcs index"
 315 funcs="$funcs insque"
 316 funcs="$funcs memchr"
 317 funcs="$funcs memcmp"
 318 funcs="$funcs memcpy"
 319 funcs="$funcs memmove"
 320 funcs="$funcs mempcpy"
 321 funcs="$funcs memset"
 322 funcs="$funcs mkstemps"
 323 funcs="$funcs putenv"
 324 funcs="$funcs random"
 325 funcs="$funcs rename"
 326 funcs="$funcs rindex"
 327 funcs="$funcs setenv"
 328 funcs="$funcs snprintf"
 329 funcs="$funcs sigsetmask"
 330 funcs="$funcs stpcpy"
 331 funcs="$funcs stpncpy"
 332 funcs="$funcs strcasecmp"
 333 funcs="$funcs strchr"
 334 funcs="$funcs strdup"
 335 funcs="$funcs strncasecmp"
 336 funcs="$funcs strndup"
 337 funcs="$funcs strrchr"
 338 funcs="$funcs strstr"
 339 funcs="$funcs strtod"
 340 funcs="$funcs strtol"
 341 funcs="$funcs strtoul"
 342 funcs="$funcs strverscmp"
 343 funcs="$funcs tmpnam"
 344 funcs="$funcs vasprintf"
 345 funcs="$funcs vfprintf"
 346 funcs="$funcs vprintf"
 347 funcs="$funcs vsnprintf"
 348 funcs="$funcs vsprintf"
 349 funcs="$funcs waitpid"
 350
 351 # Also in the old function.def file: alloca, vfork, getopt.
 352
 353 vars="sys_errlist sys_nerr sys_siglist"
 354
 355 checkfuncs="getrusage on_exit psignal strerror strsignal sysconf times sbrk gettimeofday"
 356 checkfuncs="$checkfuncs realpath canonicalize_file_name pstat_getstatic pstat_getdynamic sysmp"
 357 checkfuncs="$checkfuncs getsysinfo table sysctl wait3 wait4 __fsetlocking"
 358
 359 # These are neither executed nor required, but they help keep
 360 # autoheader happy without adding a bunch of text to acconfig.h.
 361 if test "x" = "y"; then
 362   AC_CHECK_FUNCS(asprintf atexit basename bcmp bcopy bsearch bzero calloc clock \
 363   getcwd getpagesize gettimeofday index insque mkstemps memchr memcmp memcpy \
 364   memmove mempcpy memset putenv random rename rindex sigsetmask \
 365   strcasecmp setenv stpcpy stpncpy strchr strdup strncasecmp strndup strrchr strstr \
 366   strtod strtol strtoul strverscmp tmpnam vasprintf vfprintf vprintf \
 367   vsprintf waitpid getrusage on_exit psignal strerror strsignal \
 368   sysconf times sbrk gettimeofday ffs snprintf vsnprintf \
 369   pstat_getstatic pstat_getdynamic sysmp getsysinfo table sysctl wait3 wait4 \
 370   realpath canonicalize_file_name __fsetlocking)
 371   AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf])
 372   AC_DEFINE(HAVE_SYS_ERRLIST, 1, [Define if you have the sys_errlist variable.])
 373   AC_DEFINE(HAVE_SYS_NERR,    1, [Define if you have the sys_nerr variable.])
 374   AC_DEFINE(HAVE_SYS_SIGLIST, 1, [Define if you have the sys_siglist variable.])
 375 fi
 376
 377 # For each of these functions, if the host does not provide the
 378 # function we want to put FN.o in LIBOBJS, and if the host does
 379 # provide the function, we want to define HAVE_FN in config.h.
 380
 381 setobjs=
 382 CHECK=
 383 target_header_dir=
 384 if test -n "${with_target_subdir}"; then
 385
 386   # We are being configured as a target library.  AC_REPLACE_FUNCS
 387   # may not work correctly, because the compiler may not be able to
 388   # link executables.  Note that we may still be being configured
 389   # native.
 390
 391   # If we are being configured for newlib, we know which functions
 392   # newlib provide and which ones we will be expected to provide.
 393
 394   if test "x${with_newlib}" = "xyes"; then
 395     AC_LIBOBJ([asprintf])
 396     AC_LIBOBJ([basename])
 397     AC_LIBOBJ([insque])
 398     AC_LIBOBJ([random])
 399     AC_LIBOBJ([strdup])
 400     AC_LIBOBJ([vasprintf])
 401
 402     for f in $funcs; do
 403       case "$f" in
 404         asprintf | basename | insque | random | strdup | vasprintf)
 405           ;;
 406         *)
 407           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 408           AC_DEFINE_UNQUOTED($n)
 409           ;;
 410       esac
 411     done
 412
 413     # newlib doesnt provide any of the variables in $vars, so we
 414     # dont have to check them here.
 415
 416     # Of the functions in $checkfuncs, newlib only has strerror.
 417     AC_DEFINE(HAVE_STRERROR)
 418
 419     setobjs=yes
 420
 421   fi
 422
 423   # If we are being configured for Mingw, we know which functions
 424   # Mingw provides and which ones we will be expected to provide.
 425
 426   case "${host}" in
 427   *-*-mingw*)
 428     AC_LIBOBJ([asprintf])
 429     AC_LIBOBJ([basename])
 430     AC_LIBOBJ([bcmp])
 431     AC_LIBOBJ([bcopy])
 432     AC_LIBOBJ([bzero])
 433     AC_LIBOBJ([clock])
 434     AC_LIBOBJ([ffs])
 435     AC_LIBOBJ([getpagesize])
 436     AC_LIBOBJ([index])
 437     AC_LIBOBJ([insque])
 438     AC_LIBOBJ([mempcpy])
 439     AC_LIBOBJ([mkstemps])
 440     AC_LIBOBJ([random])
 441     AC_LIBOBJ([rindex])
 442     AC_LIBOBJ([sigsetmask])
 443     AC_LIBOBJ([stpcpy])
 444     AC_LIBOBJ([stpncpy])
 445     AC_LIBOBJ([strndup])
 446     AC_LIBOBJ([strverscmp])
 447     AC_LIBOBJ([vasprintf])
 448     AC_LIBOBJ([waitpid])
 449
 450     for f in $funcs; do
 451       case "$f" in
 452         asprintf | basename | bcmp | bcopy | bzero | clock | ffs | getpagesize | index | insque | mempcpy | mkstemps | random | rindex | sigsetmask | stpcpy | stpncpy | strdup | strndup | strverscmp | vasprintf | waitpid)
 453           ;;
 454         *)
 455           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 456           AC_DEFINE_UNQUOTED($n)
 457           ;;
 458       esac
 459     done
 460
 461     # Mingw doesnt provide any of the variables in $vars, so we
 462     # dont have to check them here.
 463
 464     # Of the functions in $checkfuncs, Mingw only has strerror.
 465     AC_DEFINE(HAVE_STRERROR)
 466
 467     setobjs=yes
 468     ;;
 469
 470   esac
 471
 472   # We may wish to install the target headers somewhere.
 473   AC_ARG_ENABLE(install-libiberty,
 474   [  --enable-install-libiberty       Install headers for end users],
 475   enable_install_libiberty=$enableval,
 476   enable_install_libiberty=no)dnl
 477
 478   # Option parsed, now set things appropriately.
 479   case x"$enable_install_libiberty" in
 480     xyes|x)
 481       target_header_dir=libiberty
 482       ;;
 483     xno)
 484       target_header_dir=
 485       ;;
 486     *)
 487       # This could be sanity-checked in various ways...
 488       target_header_dir="${enable_install_libiberty}"
 489       ;;
 490   esac
 491
 492
 493 else
 494
 495    # Not a target library, so we set things up to run the test suite.
 496    CHECK=really-check
 497
 498 fi
 499
 500 AC_SUBST(CHECK)
 501 AC_SUBST(target_header_dir)
 502
 503 case "${host}" in
 504   *-*-cygwin* | *-*-mingw*)
 505     AC_DEFINE(HAVE_SYS_ERRLIST)
 506     AC_DEFINE(HAVE_SYS_NERR)
 507     ;;
 508 esac
 509
 510 if test -z "${setobjs}"; then
 511   case "${host}" in
 512
 513   *-*-vxworks*)
 514     # Handle VxWorks configuration specially, since on VxWorks the
 515     # libraries are actually on the target board, not in the file
 516     # system.
 517     AC_LIBOBJ([basename])
 518     AC_LIBOBJ([getpagesize])
 519     AC_LIBOBJ([insque])
 520     AC_LIBOBJ([random])
 521     AC_LIBOBJ([strcasecmp])
 522     AC_LIBOBJ([strncasecmp])
 523     AC_LIBOBJ([strdup])
 524     AC_LIBOBJ([vfork])
 525     AC_LIBOBJ([waitpid])
 526     AC_LIBOBJ([vasprintf])
 527     for f in $funcs; do
 528       case "$f" in
 529         basename | getpagesize | insque | random | strcasecmp)
 530           ;;
 531         strncasecmp | strdup | vfork | waitpid | vasprintf)
 532           ;;
 533         *)
 534           n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 535           AC_DEFINE_UNQUOTED($n)
 536           ;;
 537       esac
 538     done
 539
 540     # VxWorks doesn't provide any of the variables in $vars, so we
 541     # don't have to check them here.
 542
 543     # Of the functions in $checkfuncs, VxWorks only has strerror.
 544     AC_DEFINE(HAVE_STRERROR)
 545
 546     setobjs=yes
 547     ;;
 548
 549   *-*-msdosdjgpp)
 550     for f in atexit basename bcmp bcopy bsearch bzero calloc clock ffs \
 551              getcwd getpagesize getrusage gettimeofday \
 552              index insque memchr memcmp memcpy memmove memset psignal \
 553              putenv random rename rindex sbrk setenv stpcpy strcasecmp \
 554              strchr strdup strerror strncasecmp strrchr strstr strtod \
 555              strtol strtoul sysconf times tmpnam vfprintf vprintf \
 556              vsprintf waitpid
 557     do
 558       n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 559       AC_DEFINE_UNQUOTED($n)
 560     done
 561
 562
 563     setobjs=yes
 564     ;;
 565
 566   esac
 567 fi
 568
 569 if test -z "${setobjs}"; then
 570
 571   case "${host}" in
 572
 573   *-*-cygwin*)
 574     # The Cygwin library actually uses a couple of files from
 575     # libiberty when it is built.  If we are building a native
 576     # Cygwin, and we run the tests, we will appear to have these
 577     # files.  However, when we go on to build winsup, we will wind up
 578     # with a library which does not have the files, since they should
 579     # have come from libiberty.
 580
 581     # We handle this by removing the functions the winsup library
 582     # provides from our shell variables, so that they appear to be
 583     # missing.
 584
 585     # DJ - only if we're *building* cygwin, not just building *with* cygwin
 586
 587     if test -n "${with_target_subdir}"
 588     then
 589       funcs="`echo $funcs | sed -e 's/random//'`"
 590       AC_LIBOBJ([random])
 591       vars="`echo $vars | sed -e 's/sys_siglist//'`"
 592       checkfuncs="`echo $checkfuncs | sed -e 's/strsignal//' -e 's/psignal//'`"
 593     fi
 594     ;;
 595
 596   *-*-mingw32*)
 597     # Under mingw32, sys_nerr and sys_errlist exist, but they are
 598     # macros, so the test below won't find them.
 599     libiberty_cv_var_sys_nerr=yes
 600     libiberty_cv_var_sys_errlist=yes
 601     ;;
 602
 603   *-*-msdosdjgpp*)
 604     # vfork and fork are stubs.
 605     ac_cv_func_vfork_works=no
 606     ;;
 607
 608   *-*-uwin*)
 609     # Under some versions of uwin, vfork is notoriously buggy and the test
 610     # can hang configure; on other versions, vfork exists just as a stub.
 611     # FIXME: This should be removed once vfork in uwin's runtime is fixed.
 612     ac_cv_func_vfork_works=no
 613     # Under uwin 2.0+, sys_nerr and sys_errlist exist, but they are
 614     # macros (actually, these are imported from a DLL, but the end effect
 615     # is the same), so the test below won't find them.
 616     libiberty_cv_var_sys_nerr=yes
 617     libiberty_cv_var_sys_errlist=yes
 618     ;;
 619
 620   *-*-*vms*)
 621     # Under VMS, vfork works very different than on Unix. The standard test
 622     # won't work, and it isn't easily adaptable. It makes more sense to
 623     # just force it.
 624     ac_cv_func_vfork_works=yes
 625     ;;
 626
 627   esac
 628
 629   # We haven't set the list of objects yet.  Use the standard autoconf
 630   # tests.  This will only work if the compiler works.
 631   AC_ISC_POSIX
 632   AC_REPLACE_FUNCS($funcs)
 633   libiberty_AC_FUNC_C_ALLOCA
 634   AC_FUNC_FORK
 635   if test $ac_cv_func_vfork_works = no; then
 636     AC_LIBOBJ([vfork])
 637   fi
 638   # We only need _doprnt if we might use it to implement v*printf.
 639   if test $ac_cv_func_vprintf != yes \
 640      || test $ac_cv_func_vfprintf != yes \
 641      || test $ac_cv_func_vsprintf != yes; then
 642     AC_REPLACE_FUNCS(_doprnt)
 643   else
 644     AC_CHECK_FUNCS(_doprnt)
 645   fi
 646
 647   for v in $vars; do
 648     AC_MSG_CHECKING([for $v])
 649     AC_CACHE_VAL(libiberty_cv_var_$v,
 650       [AC_LINK_IFELSE([AC_LANG_PROGRAM([[int *p;]],[[extern int $v []; p = $v;]])],
 651                       [eval "libiberty_cv_var_$v=yes"],
 652                       [eval "libiberty_cv_var_$v=no"])])
 653     if eval "test \"`echo '$libiberty_cv_var_'$v`\" = yes"; then
 654       AC_MSG_RESULT(yes)
 655       n=HAVE_`echo $v | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
 656       AC_DEFINE_UNQUOTED($n)
 657     else
 658       AC_MSG_RESULT(no)
 659     fi
 660   done
 661
 662   # special check for _system_configuration because AIX <4.3.2 do not
 663   # contain the `physmem' member.
 664   AC_MSG_CHECKING([for external symbol _system_configuration])
 665   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/systemcfg.h>]],
 666                         [[double x = _system_configuration.physmem;]])],
 667     [AC_MSG_RESULT([yes])
 668     AC_DEFINE(HAVE__SYSTEM_CONFIGURATION, 1,
 669               [Define if you have the _system_configuration variable.])],
 670     [AC_MSG_RESULT([no])])
 671
 672   AC_CHECK_FUNCS($checkfuncs)
 673   AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf, snprintf, vsnprintf])
 674   AC_CHECK_DECLS([calloc, getenv, getopt, malloc, realloc, sbrk])
 675   AC_CHECK_DECLS([strverscmp])
 676   libiberty_NEED_DECLARATION(canonicalize_file_name)
 677 fi
 678
 679 # Figure out which version of pexecute to use.
 680 case "${host}" in
 681      *-*-mingw* | *-*-winnt*)   pexecute=./pex-win32.o  ;;
 682      *-*-msdosdjgpp*)           pexecute=./pex-djgpp.o  ;;
 683      *-*-msdos*)                pexecute=./pex-msdos.o  ;;
 684      *)                         pexecute=./pex-unix.o   ;;
 685 esac
 686 AC_SUBST(pexecute)
 687
 688 libiberty_AC_FUNC_STRNCMP
 689
 690 # Install a library built with a cross compiler in $(tooldir) rather
 691 # than $(libdir).
 692 if test -z "${with_cross_host}"; then
 693   INSTALL_DEST=libdir
 694 else
 695   INSTALL_DEST=tooldir
 696 fi
 697 AC_SUBST(INSTALL_DEST)
 698
 699 m4_pattern_allow(LIBOBJS)
 700 L=""
 701 for l in x $LIBOBJS; do
 702   case $l in
 703     x) ;;
 704     *) L="$L ./$l" ;;
 705   esac
 706 done
 707 LIBOBJS="$L"
 708
 709 dnl Required by html and install-html
 710 AC_SUBST(datarootdir)
 711 AC_SUBST(docdir)
 712 AC_SUBST(htmldir)
 713
 714 # We need multilib support, but only if configuring for the target.
 715 AC_CONFIG_FILES([Makefile testsuite/Makefile])
 716 AC_CONFIG_COMMANDS([default],
 717   [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
 718 if test -n "$CONFIG_FILES"; then
 719   if test -n "${with_target_subdir}"; then
 720     # FIXME: We shouldn't need to set ac_file
 721     ac_file=Makefile
 722     LD="${ORIGINAL_LD_FOR_MULTILIBS}"
 723     . ${libiberty_topdir}/config-ml.in
 724   fi
 725 fi]],
 726 [[srcdir=${srcdir}
 727 host=${host}
 728 target=${target}
 729 with_target_subdir=${with_target_subdir}
 730 with_multisubdir=${with_multisubdir}
 731 ac_configure_args="--enable-multilib ${ac_configure_args}"
 732 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
 733 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
 734 libiberty_topdir=${libiberty_topdir}
 735 ]])
 736 AC_OUTPUT