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[thirdparty/gcc.git] / 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 GCC_NO_EXECUTABLES
113 AC_PROG_CC
114 AC_PROG_CPP_WERROR
115
116 if test x$GCC = xyes; then
117 ac_libiberty_warn_cflags='-W -Wall -pedantic -Wwrite-strings -Wstrict-prototypes'
118 fi
119 AC_SUBST(ac_libiberty_warn_cflags)
120
121 AC_PROG_CC_C_O
122 # autoconf is lame and doesn't give us any substitution variable for this.
123 if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
124 NO_MINUS_C_MINUS_O=yes
125 else
126 OUTPUT_OPTION='-o $@'
127 fi
128 AC_SUBST(NO_MINUS_C_MINUS_O)
129 AC_SUBST(OUTPUT_OPTION)
130
131 AC_C_CONST
132 AC_C_INLINE
133 AC_C_BIGENDIAN_CROSS
134
135 dnl When we start using libtool:
136 dnl Default to a non shared library. This may be overridden by the
137 dnl configure option --enable-shared.
138 dnl AM_DISABLE_SHARED
139
140 dnl When we start using libtool:
141 dnl AM_PROG_LIBTOOL
142
143 dnl When we start using automake:
144 dnl AM_CONFIG_HEADER(config.h:config.in)
145 AC_CONFIG_HEADER(config.h:config.in)
146
147 dnl When we start using automake:
148 dnl AM_MAINTAINER_MODE
149 dnl AC_EXEEXT
150
151 dnl When we start using automake:
152 dnl AM_PROG_INSTALL
153 AC_PROG_INSTALL
154
155 . ${srcdir}/config.table
156 host_makefile_frag=${frag}
157 AC_SUBST_FILE(host_makefile_frag)
158
159 # It's OK to check for header files. Although the compiler may not be
160 # able to link anything, it had better be able to at least compile
161 # something.
162 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)
163 AC_HEADER_SYS_WAIT
164 AC_HEADER_TIME
165
166 libiberty_AC_DECLARE_ERRNO
167
168 # Determine the size of an int for struct fibnode.
169 AC_CHECK_SIZEOF([int])
170
171 AC_CHECK_TYPE(uintptr_t, unsigned long)
172
173 # Look for a 64-bit type.
174 AC_MSG_CHECKING([for a 64-bit type])
175 AC_CACHE_VAL(liberty_cv_uint64,
176 [AC_TRY_COMPILE(
177 [#ifdef HAVE_STDINT_H
178 #include <stdint.h>
179 #endif],
180 [extern uint64_t foo;],
181 liberty_cv_uint64=uint64_t,
182 [AC_TRY_COMPILE(
183 [#ifdef HAVE_LIMITS_H
184 #include <limits.h>
185 #endif
186 #ifndef CHAR_BIT
187 #define CHAR_BIT 8
188 #endif],
189 [extern char foo[sizeof(long) * CHAR_BIT >= 64 ? 1 : -1];],
190 liberty_cv_uint64="unsigned long",
191 [AC_TRY_COMPILE(
192 [#ifdef HAVE_LIMITS_H
193 #include <limits.h>
194 #endif
195 #ifndef CHAR_BIT
196 #define CHAR_BIT 8
197 #endif],
198 [extern char foo[sizeof(long long) * CHAR_BIT >= 64 ? 1 : -1];],
199 liberty_cv_uint64="unsigned long long", liberty_cv_uint64=none)])])])
200 AC_MSG_RESULT($liberty_cv_uint64)
201 if test "$liberty_cv_uint64" != none; then
202 AC_DEFINE_UNQUOTED(UNSIGNED_64BIT_TYPE, $liberty_cv_uint64,
203 [Define to an unsigned 64-bit type available in the compiler.])
204 fi
205
206 # Given the above check, we always have uintptr_t or a fallback
207 # definition. So define HAVE_UINTPTR_T in case any imported code
208 # relies on it.
209 AC_DEFINE(HAVE_UINTPTR_T, 1, [Define if you have the \`uintptr_t' type.])
210
211 AC_TYPE_PID_T
212
213 # This is the list of functions which libiberty will provide if they
214 # are not available on the host.
215
216 funcs="asprintf"
217 funcs="$funcs atexit"
218 funcs="$funcs basename"
219 funcs="$funcs bcmp"
220 funcs="$funcs bcopy"
221 funcs="$funcs bsearch"
222 funcs="$funcs bzero"
223 funcs="$funcs calloc"
224 funcs="$funcs clock"
225 funcs="$funcs ffs"
226 funcs="$funcs getcwd"
227 funcs="$funcs getpagesize"
228 funcs="$funcs gettimeofday"
229 funcs="$funcs index"
230 funcs="$funcs insque"
231 funcs="$funcs memchr"
232 funcs="$funcs memcmp"
233 funcs="$funcs memcpy"
234 funcs="$funcs memmove"
235 funcs="$funcs mempcpy"
236 funcs="$funcs memset"
237 funcs="$funcs mkstemps"
238 funcs="$funcs putenv"
239 funcs="$funcs random"
240 funcs="$funcs rename"
241 funcs="$funcs rindex"
242 funcs="$funcs setenv"
243 funcs="$funcs snprintf"
244 funcs="$funcs sigsetmask"
245 funcs="$funcs stpcpy"
246 funcs="$funcs stpncpy"
247 funcs="$funcs strcasecmp"
248 funcs="$funcs strchr"
249 funcs="$funcs strdup"
250 funcs="$funcs strncasecmp"
251 funcs="$funcs strndup"
252 funcs="$funcs strrchr"
253 funcs="$funcs strstr"
254 funcs="$funcs strtod"
255 funcs="$funcs strtol"
256 funcs="$funcs strtoul"
257 funcs="$funcs tmpnam"
258 funcs="$funcs vasprintf"
259 funcs="$funcs vfprintf"
260 funcs="$funcs vprintf"
261 funcs="$funcs vsnprintf"
262 funcs="$funcs vsprintf"
263 funcs="$funcs waitpid"
264
265 # Also in the old function.def file: alloca, vfork, getopt.
266
267 vars="sys_errlist sys_nerr sys_siglist"
268
269 checkfuncs="getrusage on_exit psignal strerror strsignal sysconf times sbrk gettimeofday"
270 checkfuncs="$checkfuncs realpath canonicalize_file_name pstat_getstatic pstat_getdynamic sysmp"
271 checkfuncs="$checkfuncs getsysinfo table sysctl wait3 wait4 __fsetlocking"
272
273 # These are neither executed nor required, but they help keep
274 # autoheader happy without adding a bunch of text to acconfig.h.
275 if test "x" = "y"; then
276 AC_CHECK_FUNCS(asprintf atexit basename bcmp bcopy bsearch bzero calloc clock \
277 getcwd getpagesize gettimeofday index insque mkstemps memchr memcmp memcpy \
278 memmove mempcpy memset putenv random rename rindex sigsetmask \
279 strcasecmp setenv stpcpy stpncpy strchr strdup strncasecmp strndup strrchr strstr \
280 strtod strtol strtoul tmpnam vasprintf vfprintf vprintf \
281 vsprintf waitpid getrusage on_exit psignal strerror strsignal \
282 sysconf times sbrk gettimeofday ffs snprintf vsnprintf \
283 pstat_getstatic pstat_getdynamic sysmp getsysinfo table sysctl wait3 wait4 \
284 realpath canonicalize_file_name __fsetlocking)
285 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf])
286 AC_DEFINE(HAVE_SYS_ERRLIST, 1, [Define if you have the sys_errlist variable.])
287 AC_DEFINE(HAVE_SYS_NERR, 1, [Define if you have the sys_nerr variable.])
288 AC_DEFINE(HAVE_SYS_SIGLIST, 1, [Define if you have the sys_siglist variable.])
289 fi
290
291 # For each of these functions, if the host does not provide the
292 # function we want to put FN.o in LIBOBJS, and if the host does
293 # provide the function, we want to define HAVE_FN in config.h.
294
295 setobjs=
296 CHECK=
297 target_header_dir=
298 if test -n "${with_target_subdir}"; then
299
300 # We are being configured as a target library. AC_REPLACE_FUNCS
301 # may not work correctly, because the compiler may not be able to
302 # link executables. Note that we may still be being configured
303 # native.
304
305 # If we are being configured for newlib, we know which functions
306 # newlib provide and which ones we will be expected to provide.
307
308 if test "x${with_newlib}" = "xyes"; then
309 AC_LIBOBJ([asprintf])
310 AC_LIBOBJ([basename])
311 AC_LIBOBJ([insque])
312 AC_LIBOBJ([random])
313 AC_LIBOBJ([strdup])
314 AC_LIBOBJ([vasprintf])
315
316 for f in $funcs; do
317 case "$f" in
318 asprintf | basename | insque | random | strdup | vasprintf)
319 ;;
320 *)
321 n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
322 AC_DEFINE_UNQUOTED($n)
323 ;;
324 esac
325 done
326
327 # newlib doesnt provide any of the variables in $vars, so we
328 # dont have to check them here.
329
330 # Of the functions in $checkfuncs, newlib only has strerror.
331 AC_DEFINE_NOAUTOHEADER(HAVE_STRERROR)
332
333 setobjs=yes
334
335 fi
336
337 # We may wish to install the target headers somewhere.
338 AC_ARG_ENABLE(install-libiberty,
339 [ --enable-install-libiberty Install headers for end users],
340 enable_install_libiberty=$enableval,
341 enable_install_libiberty=no)dnl
342
343 # Option parsed, now set things appropriately.
344 case x"$enable_install_libiberty" in
345 xyes|x)
346 target_header_dir=libiberty
347 ;;
348 xno)
349 target_header_dir=
350 ;;
351 *)
352 # This could be sanity-checked in various ways...
353 target_header_dir="${enable_install_libiberty}"
354 ;;
355 esac
356
357
358 else
359
360 # Not a target library, so we set things up to run the test suite.
361 CHECK=really-check
362
363 fi
364
365 AC_SUBST(CHECK)
366 AC_SUBST(target_header_dir)
367
368 case "${host}" in
369 *-*-cygwin* | *-*-mingw*)
370 AC_DEFINE_NOAUTOHEADER(HAVE_SYS_ERRLIST)
371 AC_DEFINE_NOAUTOHEADER(HAVE_SYS_NERR)
372 ;;
373 esac
374
375 if test -z "${setobjs}"; then
376 case "${host}" in
377
378 *-*-vxworks*)
379 # Handle VxWorks configuration specially, since on VxWorks the
380 # libraries are actually on the target board, not in the file
381 # system.
382 AC_LIBOBJ([basename])
383 AC_LIBOBJ([getpagesize])
384 AC_LIBOBJ([insque])
385 AC_LIBOBJ([random])
386 AC_LIBOBJ([strcasecmp])
387 AC_LIBOBJ([strncasecmp])
388 AC_LIBOBJ([strdup])
389 AC_LIBOBJ([vfork])
390 AC_LIBOBJ([waitpid])
391 AC_LIBOBJ([vasprintf])
392 for f in $funcs; do
393 case "$f" in
394 basename | getpagesize | insque | random | strcasecmp)
395 ;;
396 strncasecmp | strdup | vfork | waitpid | vasprintf)
397 ;;
398 *)
399 n=HAVE_`echo $f | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
400 AC_DEFINE_UNQUOTED($n)
401 ;;
402 esac
403 done
404
405 # VxWorks doesn't provide any of the variables in $vars, so we
406 # don't have to check them here.
407
408 # Of the functions in $checkfuncs, VxWorks only has strerror.
409 AC_DEFINE_NOAUTOHEADER(HAVE_STRERROR)
410
411 setobjs=yes
412 ;;
413
414 esac
415 fi
416
417 if test -z "${setobjs}"; then
418
419 case "${host}" in
420
421 *-*-cygwin*)
422 # The Cygwin library actually uses a couple of files from
423 # libiberty when it is built. If we are building a native
424 # Cygwin, and we run the tests, we will appear to have these
425 # files. However, when we go on to build winsup, we will wind up
426 # with a library which does not have the files, since they should
427 # have come from libiberty.
428
429 # We handle this by removing the functions the winsup library
430 # provides from our shell variables, so that they appear to be
431 # missing.
432
433 # DJ - only if we're *building* cygwin, not just building *with* cygwin
434
435 if test -n "${with_target_subdir}"
436 then
437 funcs="`echo $funcs | sed -e 's/random//'`"
438 AC_LIBOBJ([random])
439 vars="`echo $vars | sed -e 's/sys_siglist//'`"
440 checkfuncs="`echo $checkfuncs | sed -e 's/strsignal//' -e 's/psignal//'`"
441 fi
442 ;;
443
444 *-*-mingw32*)
445 # Under mingw32, sys_nerr and sys_errlist exist, but they are
446 # macros, so the test below won't find them.
447 libiberty_cv_var_sys_nerr=yes
448 libiberty_cv_var_sys_errlist=yes
449 ;;
450
451 *-*-msdosdjgpp*)
452 # vfork and fork are stubs.
453 ac_cv_func_vfork_works=no
454 ;;
455
456 *-*-uwin*)
457 # Under some versions of uwin, vfork is notoriously buggy and the test
458 # can hang configure; on other versions, vfork exists just as a stub.
459 # FIXME: This should be removed once vfork in uwin's runtime is fixed.
460 ac_cv_func_vfork_works=no
461 # Under uwin 2.0+, sys_nerr and sys_errlist exist, but they are
462 # macros (actually, these are imported from a DLL, but the end effect
463 # is the same), so the test below won't find them.
464 libiberty_cv_var_sys_nerr=yes
465 libiberty_cv_var_sys_errlist=yes
466 ;;
467
468 *-*-*vms*)
469 # Under VMS, vfork works very different than on Unix. The standard test
470 # won't work, and it isn't easily adaptable. It makes more sense to
471 # just force it.
472 ac_cv_func_vfork_works=yes
473 ;;
474
475 esac
476
477 # We haven't set the list of objects yet. Use the standard autoconf
478 # tests. This will only work if the compiler works.
479 AC_ISC_POSIX
480 AC_REPLACE_FUNCS($funcs)
481 libiberty_AC_FUNC_C_ALLOCA
482 AC_FUNC_FORK
483 if test $ac_cv_func_vfork_works = no; then
484 AC_LIBOBJ([vfork])
485 fi
486 # We only need _doprnt if we might use it to implement v*printf.
487 if test $ac_cv_func_vprintf != yes \
488 || test $ac_cv_func_vfprintf != yes \
489 || test $ac_cv_func_vsprintf != yes; then
490 AC_REPLACE_FUNCS(_doprnt)
491 else
492 AC_CHECK_FUNCS(_doprnt)
493 fi
494
495 for v in $vars; do
496 AC_MSG_CHECKING([for $v])
497 AC_CACHE_VAL(libiberty_cv_var_$v,
498 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[int *p;]],[[extern int $v []; p = $v;]])],
499 [eval "libiberty_cv_var_$v=yes"],
500 [eval "libiberty_cv_var_$v=no"])])
501 if eval "test \"`echo '$libiberty_cv_var_'$v`\" = yes"; then
502 AC_MSG_RESULT(yes)
503 n=HAVE_`echo $v | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
504 AC_DEFINE_UNQUOTED($n)
505 else
506 AC_MSG_RESULT(no)
507 fi
508 done
509
510 # special check for _system_configuration because AIX <4.3.2 do not
511 # contain the `physmem' member.
512 AC_MSG_CHECKING([for external symbol _system_configuration])
513 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/systemcfg.h>]],
514 [[double x = _system_configuration.physmem;]])],
515 [AC_MSG_RESULT([yes])
516 AC_DEFINE(HAVE__SYSTEM_CONFIGURATION, 1,
517 [Define if you have the _system_configuration variable.])],
518 [AC_MSG_RESULT([no])])
519
520 AC_CHECK_FUNCS($checkfuncs)
521 AC_CHECK_DECLS([basename, ffs, asprintf, vasprintf])
522 libiberty_NEED_DECLARATION(canonicalize_file_name)
523 fi
524
525 # Figure out which version of pexecute to use.
526 case "${host}" in
527 *-*-mingw* | *-*-winnt*) pexecute=./pex-win32.o ;;
528 *-*-msdosdjgpp*) pexecute=./pex-djgpp.o ;;
529 *-*-msdos*) pexecute=./pex-msdos.o ;;
530 *) pexecute=./pex-unix.o ;;
531 esac
532 AC_SUBST(pexecute)
533
534 libiberty_AC_FUNC_STRNCMP
535
536 # Install a library built with a cross compiler in $(tooldir) rather
537 # than $(libdir).
538 if test -z "${with_cross_host}"; then
539 INSTALL_DEST=libdir
540 else
541 INSTALL_DEST=tooldir
542 fi
543 AC_SUBST(INSTALL_DEST)
544
545 m4_pattern_allow(LIBOBJS)
546 L=""
547 for l in x $LIBOBJS; do
548 case $l in
549 x) ;;
550 *) L="$L ./$l" ;;
551 esac
552 done
553 LIBOBJS="$L"
554
555 # We need multilib support, but only if configuring for the target.
556 AC_CONFIG_FILES([Makefile testsuite/Makefile])
557 AC_CONFIG_COMMANDS([default],
558 [[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
559 if test -n "$CONFIG_FILES"; then
560 if test -n "${with_target_subdir}"; then
561 # FIXME: We shouldn't need to set ac_file
562 ac_file=Makefile
563 LD="${ORIGINAL_LD_FOR_MULTILIBS}"
564 . ${libiberty_topdir}/config-ml.in
565 fi
566 fi]],
567 [[srcdir=${srcdir}
568 host=${host}
569 target=${target}
570 with_target_subdir=${with_target_subdir}
571 with_multisubdir=${with_multisubdir}
572 ac_configure_args="--enable-multilib ${ac_configure_args}"
573 CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
574 ORIGINAL_LD_FOR_MULTILIBS="${ORIGINAL_LD_FOR_MULTILIBS}"
575 libiberty_topdir=${libiberty_topdir}
576 ]])
577 AC_OUTPUT