bfd/aclocal.m4

   1 dnl aclocal.m4 generated automatically by aclocal 1.2e
   2
   3 dnl Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   4 dnl This Makefile.in is free software; the Free Software Foundation
   5 dnl gives unlimited permission to copy and/or distribute it,
   6 dnl with or without modifications, as long as this notice is preserved.
   7
   8 dnl This program is distributed in the hope that it will be useful,
   9 dnl but WITHOUT ANY WARRANTY, to the extent permitted by law; without
  10 dnl even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  11 dnl PARTICULAR PURPOSE.
  12
  13 dnl See whether we need to use fopen-bin.h rather than fopen-same.h.
  14 AC_DEFUN(BFD_BINARY_FOPEN,
  15 [AC_REQUIRE([AC_CANONICAL_SYSTEM])
  16 case "${host}" in
  17 changequote(,)dnl
  18 i[345]86-*-msdos* | i[345]86-*-go32* | i[345]86-*-mingw32* | *-*-cygwin32* | *-*-windows)
  19 changequote([,])dnl
  20   AC_DEFINE(USE_BINARY_FOPEN) ;;
  21 esac])dnl
  22
  23 dnl Get a default for CC_FOR_BUILD to put into Makefile.
  24 AC_DEFUN(BFD_CC_FOR_BUILD,
  25 [# Put a plausible default for CC_FOR_BUILD in Makefile.
  26 if test -z "$CC_FOR_BUILD"; then
  27   if test "x$cross_compiling" = "xno"; then
  28     CC_FOR_BUILD='$(CC)'
  29   else
  30     CC_FOR_BUILD=gcc
  31   fi
  32 fi
  33 AC_SUBST(CC_FOR_BUILD)
  34 # Also set EXEEXT_FOR_BUILD.
  35 if test "x$cross_compiling" = "xno"; then
  36   EXEEXT_FOR_BUILD='$(EXEEXT)'
  37 else
  38   AC_CACHE_CHECK([for build system executable suffix], bfd_cv_build_exeext,
  39     [cat > ac_c_test.c << 'EOF'
  40 int main() {
  41 /* Nothing needed here */
  42 }
  43 EOF
  44     ${CC_FOR_BUILD} -o ac_c_test am_c_test.c 1>&5 2>&5
  45     bfd_cv_build_exeext=`echo ac_c_test.* | grep -v ac_c_test.c | sed -e s/ac_c_test//`
  46     rm -f ac_c_test*
  47     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no])
  48   EXEEXT_FOR_BUILD=""
  49   test x"${bfd_cv_build_exeext}" != xno && EXEEXT_FOR_BUILD=${bfd_cv_build_exeext}
  50 fi
  51 AC_SUBST(EXEEXT_FOR_BUILD)])dnl
  52
  53 dnl See whether we need a declaration for a function.
  54 AC_DEFUN(BFD_NEED_DECLARATION,
  55 [AC_MSG_CHECKING([whether $1 must be declared])
  56 AC_CACHE_VAL(bfd_cv_decl_needed_$1,
  57 [AC_TRY_COMPILE([
  58 #include <stdio.h>
  59 #ifdef HAVE_STRING_H
  60 #include <string.h>
  61 #else
  62 #ifdef HAVE_STRINGS_H
  63 #include <strings.h>
  64 #endif
  65 #endif
  66 #ifdef HAVE_STDLIB_H
  67 #include <stdlib.h>
  68 #endif
  69 #ifdef HAVE_UNISTD_H
  70 #include <unistd.h>
  71 #endif],
  72 [char *(*pfn) = (char *(*)) $1],
  73 bfd_cv_decl_needed_$1=no, bfd_cv_decl_needed_$1=yes)])
  74 AC_MSG_RESULT($bfd_cv_decl_needed_$1)
  75 if test $bfd_cv_decl_needed_$1 = yes; then
  76   bfd_tr_decl=NEED_DECLARATION_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
  77   AC_DEFINE_UNQUOTED($bfd_tr_decl)
  78 fi
  79 ])dnl
  80
  81 # Do all the work for Automake.  This macro actually does too much --
  82 # some checks are only needed if your package does certain things.
  83 # But this isn't really a big deal.
  84
  85 # serial 1
  86
  87 dnl Usage:
  88 dnl AM_INIT_AUTOMAKE(package,version, [no-define])
  89
  90 AC_DEFUN(AM_INIT_AUTOMAKE,
  91 [AC_REQUIRE([AM_PROG_INSTALL])
  92 PACKAGE=[$1]
  93 AC_SUBST(PACKAGE)
  94 VERSION=[$2]
  95 AC_SUBST(VERSION)
  96 dnl test to see if srcdir already configured
  97 if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
  98   AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
  99 fi
 100 ifelse([$3],,
 101 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
 102 AC_DEFINE_UNQUOTED(VERSION, "$VERSION"))
 103 AC_REQUIRE([AM_SANITY_CHECK])
 104 AC_REQUIRE([AC_ARG_PROGRAM])
 105 dnl FIXME This is truly gross.
 106 missing_dir=`cd $ac_aux_dir && pwd`
 107 AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
 108 AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
 109 AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
 110 AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
 111 AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
 112 AC_REQUIRE([AC_PROG_MAKE_SET])])
 113
 114
 115 # serial 1
 116
 117 AC_DEFUN(AM_PROG_INSTALL,
 118 [AC_REQUIRE([AC_PROG_INSTALL])
 119 test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
 120 AC_SUBST(INSTALL_SCRIPT)dnl
 121 ])
 122
 123 #
 124 # Check to make sure that the build environment is sane.
 125 #
 126
 127 AC_DEFUN(AM_SANITY_CHECK,
 128 [AC_MSG_CHECKING([whether build environment is sane])
 129 # Just in case
 130 sleep 1
 131 echo timestamp > conftestfile
 132 # Do `set' in a subshell so we don't clobber the current shell's
 133 # arguments.  Must try -L first in case configure is actually a
 134 # symlink; some systems play weird games with the mod time of symlinks
 135 # (eg FreeBSD returns the mod time of the symlink's containing
 136 # directory).
 137 if (
 138    set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
 139    if test "[$]*" = "X"; then
 140       # -L didn't work.
 141       set X `ls -t $srcdir/configure conftestfile`
 142    fi
 143    if test "[$]*" != "X $srcdir/configure conftestfile" \
 144       && test "[$]*" != "X conftestfile $srcdir/configure"; then
 145
 146       # If neither matched, then we have a broken ls.  This can happen
 147       # if, for instance, CONFIG_SHELL is bash and it inherits a
 148       # broken ls alias from the environment.  This has actually
 149       # happened.  Such a system could not be considered "sane".
 150       AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
 151 alias in your environment])
 152    fi
 153
 154    test "[$]2" = conftestfile
 155    )
 156 then
 157    # Ok.
 158    :
 159 else
 160    AC_MSG_ERROR([newly created file is older than distributed files!
 161 Check your system clock])
 162 fi
 163 rm -f conftest*
 164 AC_MSG_RESULT(yes)])
 165
 166 dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
 167 dnl The program must properly implement --version.
 168 AC_DEFUN(AM_MISSING_PROG,
 169 [AC_MSG_CHECKING(for working $2)
 170 # Run test in a subshell; some versions of sh will print an error if
 171 # an executable is not found, even if stderr is redirected.
 172 # Redirect stdin to placate older versions of autoconf.  Sigh.
 173 if ($2 --version) < /dev/null > /dev/null 2>&1; then
 174    $1=$2
 175    AC_MSG_RESULT(found)
 176 else
 177    $1="$3/missing $2"
 178    AC_MSG_RESULT(missing)
 179 fi
 180 AC_SUBST($1)])
 181
 182
 183 # serial 24 AM_PROG_LIBTOOL
 184 AC_DEFUN(AM_PROG_LIBTOOL,
 185 [AC_REQUIRE([AM_ENABLE_SHARED])dnl
 186 AC_REQUIRE([AM_ENABLE_STATIC])dnl
 187 AC_REQUIRE([AC_CANONICAL_HOST])dnl
 188 AC_REQUIRE([AC_PROG_RANLIB])dnl
 189 AC_REQUIRE([AC_PROG_CC])dnl
 190 AC_REQUIRE([AM_PROG_LD])dnl
 191 AC_REQUIRE([AM_PROG_NM])dnl
 192 AC_REQUIRE([AC_PROG_LN_S])dnl
 193 dnl
 194 # Always use our own libtool.
 195 LIBTOOL='$(SHELL) $(top_builddir)/libtool'
 196 AC_SUBST(LIBTOOL)dnl
 197
 198 # Check for any special flags to pass to ltconfig.
 199 libtool_flags=
 200 test "$enable_shared" = no && libtool_flags="$libtool_flags --disable-shared"
 201 test "$enable_static" = no && libtool_flags="$libtool_flags --disable-static"
 202 test "$silent" = yes && libtool_flags="$libtool_flags --silent"
 203 test "$ac_cv_prog_gcc" = yes && libtool_flags="$libtool_flags --with-gcc"
 204 test "$ac_cv_prog_gnu_ld" = yes && libtool_flags="$libtool_flags --with-gnu-ld"
 205
 206 # Some flags need to be propagated to the compiler or linker for good
 207 # libtool support.
 208 case "$host" in
 209 *-*-irix6*)
 210   # Find out which ABI we are using.
 211   echo '[#]line __oline__ "configure"' > conftest.$ac_ext
 212   if AC_TRY_EVAL(ac_compile); then
 213     case "`/usr/bin/file conftest.o`" in
 214     *32-bit*)
 215       LD="${LD-ld} -32"
 216       ;;
 217     *N32*)
 218       LD="${LD-ld} -n32"
 219       ;;
 220     *64-bit*)
 221       LD="${LD-ld} -64"
 222       ;;
 223     esac
 224   fi
 225   rm -rf conftest*
 226   ;;
 227
 228 *-*-sco3.2v5*)
 229   # On SCO OpenServer 5, we need -belf to get full-featured binaries.
 230   CFLAGS="$CFLAGS -belf"
 231   ;;
 232 esac
 233
 234 # Actually configure libtool.  ac_aux_dir is where install-sh is found.
 235 CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
 236 LD="$LD" NM="$NM" RANLIB="$RANLIB" LN_S="$LN_S" \
 237 ${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig \
 238 $libtool_flags --no-verify $ac_aux_dir/ltmain.sh $host \
 239 || AC_MSG_ERROR([libtool configure failed])
 240 ])
 241
 242 # AM_ENABLE_SHARED - implement the --enable-shared flag
 243 # Usage: AM_ENABLE_SHARED[(DEFAULT)]
 244 #   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
 245 #   `yes'.
 246 AC_DEFUN(AM_ENABLE_SHARED,
 247 [define([AM_ENABLE_SHARED_DEFAULT], ifelse($1, no, no, yes))dnl
 248 AC_ARG_ENABLE(shared,
 249 changequote(<<, >>)dnl
 250 <<  --enable-shared         build shared libraries [default=>>AM_ENABLE_SHARED_DEFAULT]
 251 changequote([, ])dnl
 252 [  --enable-shared=PKGS    only build shared libraries if the current package
 253                           appears as an element in the PKGS list],
 254 [p=${PACKAGE-default}
 255 case "$enableval" in
 256 yes) enable_shared=yes ;;
 257 no) enable_shared=no ;;
 258 *)
 259   enable_shared=no
 260   # Look at the argument we got.  We use all the common list separators.
 261   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 262   for pkg in $enableval; do
 263     if test "X$pkg" = "X$p"; then
 264       enable_shared=yes
 265     fi
 266   done
 267   IFS="$ac_save_ifs"
 268   ;;
 269 esac],
 270 enable_shared=AM_ENABLE_SHARED_DEFAULT)dnl
 271 ])
 272
 273 # AM_DISABLE_SHARED - set the default shared flag to --disable-shared
 274 AC_DEFUN(AM_DISABLE_SHARED,
 275 [AM_ENABLE_SHARED(no)])
 276
 277 # AM_DISABLE_STATIC - set the default static flag to --disable-static
 278 AC_DEFUN(AM_DISABLE_STATIC,
 279 [AM_ENABLE_STATIC(no)])
 280
 281 # AM_ENABLE_STATIC - implement the --enable-static flag
 282 # Usage: AM_ENABLE_STATIC[(DEFAULT)]
 283 #   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
 284 #   `yes'.
 285 AC_DEFUN(AM_ENABLE_STATIC,
 286 [define([AM_ENABLE_STATIC_DEFAULT], ifelse($1, no, no, yes))dnl
 287 AC_ARG_ENABLE(static,
 288 changequote(<<, >>)dnl
 289 <<  --enable-static         build static libraries [default=>>AM_ENABLE_STATIC_DEFAULT]
 290 changequote([, ])dnl
 291 [  --enable-static=PKGS    only build shared libraries if the current package
 292                           appears as an element in the PKGS list],
 293 [p=${PACKAGE-default}
 294 case "$enableval" in
 295 yes) enable_static=yes ;;
 296 no) enable_static=no ;;
 297 *)
 298   enable_static=no
 299   # Look at the argument we got.  We use all the common list separators.
 300   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
 301   for pkg in $enableval; do
 302     if test "X$pkg" = "X$p"; then
 303       enable_static=yes
 304     fi
 305   done
 306   IFS="$ac_save_ifs"
 307   ;;
 308 esac],
 309 enable_static=AM_ENABLE_STATIC_DEFAULT)dnl
 310 ])
 311
 312
 313 # AM_PROG_LD - find the path to the GNU or non-GNU linker
 314 AC_DEFUN(AM_PROG_LD,
 315 [AC_ARG_WITH(gnu-ld,
 316 [  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
 317 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
 318 AC_REQUIRE([AC_PROG_CC])
 319 ac_prog=ld
 320 if test "$ac_cv_prog_gcc" = yes; then
 321   # Check if gcc -print-prog-name=ld gives a path.
 322   AC_MSG_CHECKING([for ld used by GCC])
 323   ac_prog=`($CC -print-prog-name=ld) 2>&5`
 324   case "$ac_prog" in
 325   # Accept absolute paths.
 326   /* | [A-Za-z]:\\*)
 327     test -z "$LD" && LD="$ac_prog"
 328     ;;
 329   "")
 330     # If it fails, then pretend we aren't using GCC.
 331     ac_prog=ld
 332     ;;
 333   *)
 334     # If it is relative, then search for the first ld in PATH.
 335     with_gnu_ld=unknown
 336     ;;
 337   esac
 338 elif test "$with_gnu_ld" = yes; then
 339   AC_MSG_CHECKING([for GNU ld])
 340 else
 341   AC_MSG_CHECKING([for non-GNU ld])
 342 fi
 343 AC_CACHE_VAL(ac_cv_path_LD,
 344 [if test -z "$LD"; then
 345   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 346   for ac_dir in $PATH; do
 347     test -z "$ac_dir" && ac_dir=.
 348     if test -f "$ac_dir/$ac_prog"; then
 349       ac_cv_path_LD="$ac_dir/$ac_prog"
 350       # Check to see if the program is GNU ld.  I'd rather use --version,
 351       # but apparently some GNU ld's only accept -v.
 352       # Break only if it was the GNU/non-GNU ld that we prefer.
 353       if "$ac_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
 354         test "$with_gnu_ld" != no && break
 355       else
 356         test "$with_gnu_ld" != yes && break
 357       fi
 358     fi
 359   done
 360   IFS="$ac_save_ifs"
 361 else
 362   ac_cv_path_LD="$LD" # Let the user override the test with a path.
 363 fi])
 364 LD="$ac_cv_path_LD"
 365 if test -n "$LD"; then
 366   AC_MSG_RESULT($LD)
 367 else
 368   AC_MSG_RESULT(no)
 369 fi
 370 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
 371 AC_SUBST(LD)
 372 AM_PROG_LD_GNU
 373 ])
 374
 375 AC_DEFUN(AM_PROG_LD_GNU,
 376 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
 377 [# I'd rather use --version here, but apparently some GNU ld's only accept -v.
 378 if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
 379   ac_cv_prog_gnu_ld=yes
 380 else
 381   ac_cv_prog_gnu_ld=no
 382 fi])
 383 ])
 384
 385 # AM_PROG_NM - find the path to a BSD-compatible name lister
 386 AC_DEFUN(AM_PROG_NM,
 387 [AC_MSG_CHECKING([for BSD-compatible nm])
 388 AC_CACHE_VAL(ac_cv_path_NM,
 389 [case "$NM" in
 390 /* | [A-Za-z]:\\*)
 391   ac_cv_path_NM="$NM" # Let the user override the test with a path.
 392   ;;
 393 *)
 394   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
 395   for ac_dir in /usr/ucb /usr/ccs/bin $PATH /bin; do
 396     test -z "$ac_dir" && ac_dir=.
 397     if test -f $ac_dir/nm; then
 398       # Check to see if the nm accepts a BSD-compat flag.
 399       # Adding the `sed 1q' prevents false positives on HP-UX, which says:
 400       #   nm: unknown option "B" ignored
 401       if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
 402         ac_cv_path_NM="$ac_dir/nm -B"
 403       elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
 404         ac_cv_path_NM="$ac_dir/nm -p"
 405       else
 406         ac_cv_path_NM="$ac_dir/nm"
 407       fi
 408       break
 409     fi
 410   done
 411   IFS="$ac_save_ifs"
 412   test -z "$ac_cv_path_NM" && ac_cv_path_NM=nm
 413   ;;
 414 esac])
 415 NM="$ac_cv_path_NM"
 416 AC_MSG_RESULT([$NM])
 417 AC_SUBST(NM)
 418 ])
 419
 420 # Like AC_CONFIG_HEADER, but automatically create stamp file.
 421
 422 AC_DEFUN(AM_CONFIG_HEADER,
 423 [AC_PREREQ([2.12])
 424 AC_CONFIG_HEADER([$1])
 425 dnl When config.status generates a header, we must update the stamp-h file.
 426 dnl This file resides in the same directory as the config header
 427 dnl that is generated.  We must strip everything past the first ":",
 428 dnl and everything past the last "/".
 429 AC_OUTPUT_COMMANDS(changequote(<<,>>)dnl
 430 ifelse(patsubst(<<$1>>, <<[^ ]>>, <<>>), <<>>,
 431 <<test -z "<<$>>CONFIG_HEADERS" || echo timestamp > patsubst(<<$1>>, <<^\([^:]*/\)?.*>>, <<\1>>)stamp-h<<>>dnl>>,
 432 <<am_indx=1
 433 for am_file in <<$1>>; do
 434   case " <<$>>CONFIG_HEADERS " in
 435   *" <<$>>am_file "*<<)>>
 436     echo timestamp > `echo <<$>>am_file | sed -e 's%:.*%%' -e 's%[^/]*$%%'`stamp-h$am_indx
 437     ;;
 438   esac
 439   am_indx=`expr "<<$>>am_indx" + 1`
 440 done<<>>dnl>>)
 441 changequote([,]))])
 442
 443 # Add --enable-maintainer-mode option to configure.
 444 # From Jim Meyering
 445
 446 # serial 1
 447
 448 AC_DEFUN(AM_MAINTAINER_MODE,
 449 [AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
 450   dnl maintainer-mode is disabled by default
 451   AC_ARG_ENABLE(maintainer-mode,
 452 [  --enable-maintainer-mode enable make rules and dependencies not useful
 453                           (and sometimes confusing) to the casual installer],
 454       USE_MAINTAINER_MODE=$enableval,
 455       USE_MAINTAINER_MODE=no)
 456   AC_MSG_RESULT($USE_MAINTAINER_MODE)
 457   if test $USE_MAINTAINER_MODE = yes; then
 458     MAINT=
 459   else
 460     MAINT='#M#'
 461   fi
 462   AC_SUBST(MAINT)dnl
 463 ]
 464 )
 465
 466 # Check to see if we're running under Cygwin32, without using
 467 # AC_CANONICAL_*.  If so, set output variable CYGWIN32 to "yes".
 468 # Otherwise set it to "no".
 469
 470 dnl AM_CYGWIN32()
 471 AC_DEFUN(AM_CYGWIN32,
 472 [AC_CACHE_CHECK(for Cygwin32 environment, am_cv_cygwin32,
 473 [AC_TRY_COMPILE(,[return __CYGWIN32__;],
 474 am_cv_cygwin32=yes, am_cv_cygwin32=no)
 475 rm -f conftest*])
 476 CYGWIN32=
 477 test "$am_cv_cygwin32" = yes && CYGWIN32=yes])
 478
 479 # Check to see if we're running under Win32, without using
 480 # AC_CANONICAL_*.  If so, set output variable EXEEXT to ".exe".
 481 # Otherwise set it to "".
 482
 483 dnl AM_EXEEXT()
 484 dnl This knows we add .exe if we're building in the Cygwin32
 485 dnl environment. But if we're not, then it compiles a test program
 486 dnl to see if there is a suffix for executables.
 487 AC_DEFUN(AM_EXEEXT,
 488 [AC_REQUIRE([AM_CYGWIN32])
 489 AC_REQUIRE([AM_MINGW32])
 490 AC_MSG_CHECKING([for executable suffix])
 491 AC_CACHE_VAL(am_cv_exeext,
 492 [if test "$CYGWIN32" = yes || test "$MINGW32" = yes; then
 493 am_cv_exeext=.exe
 494 else
 495 cat > am_c_test.c << 'EOF'
 496 int main() {
 497 /* Nothing needed here */
 498 }
 499 EOF
 500 ${CC-cc} -o am_c_test $CFLAGS $CPPFLAGS $LDFLAGS am_c_test.c $LIBS 1>&5
 501 am_cv_exeext=`echo am_c_test.* | grep -v am_c_test.c | sed -e s/am_c_test//`
 502 rm -f am_c_test*])
 503 test x"${am_cv_exeext}" = x && am_cv_exeext=no
 504 fi
 505 EXEEXT=""
 506 test x"${am_cv_exeext}" != xno && EXEEXT=${am_cv_exeext}
 507 AC_MSG_RESULT(${am_cv_exeext})
 508 AC_SUBST(EXEEXT)])
 509
 510 # Check to see if we're running under Mingw, without using
 511 # AC_CANONICAL_*.  If so, set output variable MINGW32 to "yes".
 512 # Otherwise set it to "no".
 513
 514 dnl AM_MINGW32()
 515 AC_DEFUN(AM_MINGW32,
 516 [AC_CACHE_CHECK(for Mingw32 environment, am_cv_mingw32,
 517 [AC_TRY_COMPILE(,[return __MINGW32__;],
 518 am_cv_mingw32=yes, am_cv_mingw32=no)
 519 rm -f conftest*])
 520 MINGW32=
 521 test "$am_cv_mingw32" = yes && MINGW32=yes])
 522