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28f540f4 | 1 | dnl Process this file with autoconf to produce a configure script. |
ff3d7ed3 RM |
2 | AC_REVISION([$CVSid$]) |
3 | AC_PREREQ(2.2)dnl dnl Minimum Autoconf version required. | |
28f540f4 RM |
4 | AC_INIT(features.h) |
5 | AC_CONFIG_HEADER(config.h) | |
6 | ||
7 | # This will get text that should go into config.make. | |
8 | config_vars= | |
9 | ||
10 | # Check for a --with-gmp argument and set gmp-srcdir in config.make. | |
11 | AC_ARG_WITH(gmp, dnl | |
12 | --with-gmp=DIRECTORY find GMP source code in DIRECTORY (not needed), | |
13 | [dnl | |
14 | case "$with_gmp" in | |
15 | yes) AC_MSG_ERROR(--with-gmp requires an argument; use --with-gmp=DIRECTORY) ;; | |
16 | ''|no) ;; | |
17 | *) config_vars="$config_vars | |
18 | gmp-srcdir = $withval" ;; | |
19 | esac | |
20 | ]) | |
21 | ||
ff3d7ed3 | 22 | dnl Arguments to specify presence of other packages/features. |
28f540f4 RM |
23 | AC_ARG_WITH(gnu-binutils, dnl |
24 | --with-gnu-binutils if using GNU binutils (as and ld), | |
25 | gnu_binutils=yes, gnu_binutils=no) | |
26 | AC_ARG_WITH(gnu-ld, dnl | |
27 | --with-gnu-ld if using GNU ld (in the binutils package), | |
28 | gnu_ld=yes, gnu_ld=no) | |
29 | AC_ARG_WITH(gnu-as, dnl | |
30 | --with-gnu-as if using GNU as (in the binutils package), | |
31 | gnu_as=yes, gnu_as=no) | |
32 | test $gnu_binutils = yes && gnu_as=yes gnu_ld=yes | |
33 | AC_ARG_WITH(elf, dnl | |
34 | --with-elf if using the ELF object format, | |
35 | elf=yes, elf=no) | |
36 | AC_ARG_WITH(weak-symbols, dnl | |
37 | --with-weak-symbols if weak symbols are available in as and ld, | |
38 | weak=yes, weak=no) | |
39 | ||
ff3d7ed3 RM |
40 | dnl Arguments to enable or disable building the shared, profiled, and |
41 | dnl -fomit-frame-pointer libraries. | |
42 | AC_ARG_ENABLE(shared, dnl | |
43 | [ --enable-shared build shared library [default=yes if GNU ld & ELF]], | |
424f8c09 | 44 | shared=$enableval, shared=default) |
ff3d7ed3 RM |
45 | AC_ARG_ENABLE(profile, dnl |
46 | [ --enable-profile build profiled library [default=yes]], | |
424f8c09 | 47 | profile=$enableval, profile=yes) |
ff3d7ed3 RM |
48 | AC_ARG_ENABLE(omitfp, dnl |
49 | [ --enable-omitfp build undebuggable optimized library [default=no]], | |
424f8c09 | 50 | omitfp=$enableval, omitfp=no) |
ff3d7ed3 | 51 | |
28f540f4 RM |
52 | AC_CANONICAL_HOST |
53 | # We keep the original values in `$config_*' and never modify them, so we | |
54 | # can write them unchanged into config.make. Everything else uses | |
55 | # $machine, $vendor, and $os, and changes them whenever convenient. | |
56 | config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os | |
57 | ||
58 | sysdep_dir=$srcdir/sysdeps | |
59 | AC_MSG_CHECKING(sysdep dirs) | |
60 | AC_CACHE_VAL(libc_cv_sysdirs, [dnl | |
61 | machine=$config_machine | |
62 | vendor=$config_vendor | |
63 | os=$config_os | |
64 | ||
65 | dnl We need to use [ and ] for other purposes for a while now. | |
66 | changequote(,)dnl | |
67 | # Expand the configuration machine name into a subdirectory by architecture | |
68 | # type and particular chip. | |
69 | case "$machine" in | |
70 | i[345]86) | |
71 | machine=i386/$machine ;; | |
72 | sparc[6789]) | |
73 | machine=sparc/$machine ;; | |
74 | m68k) | |
75 | machine=m68k/m68020 ;; | |
76 | m680?0) | |
77 | machine=m68k/$machine ;; | |
78 | m88k) | |
79 | machine=m88k/m88100 ;; | |
80 | m88???) | |
81 | machine=m88k/$machine ;; | |
82 | mips64*) | |
83 | machine=mips/mips64/$machine ;; | |
84 | mips*) | |
85 | machine=mips/$machine ;; | |
86 | esac | |
87 | ||
88 | # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. | |
89 | os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" | |
90 | ||
91 | case "$os" in | |
92 | gnu*) | |
93 | base_os=mach/hurd ;; | |
94 | netbsd* | 386bsd*) | |
95 | base_os=unix/bsd/bsd4.4 ;; | |
222c4e71 | 96 | osf* | sunos* | ultrix* | newsos* | dynix* | *bsd*) |
28f540f4 RM |
97 | base_os=unix/bsd ;; |
98 | linux* | sysv* | isc* | esix* | sco* | minix* | irix4*) | |
99 | base_os=unix/sysv ;; | |
100 | solaris[2-9]*) | |
101 | base_os=unix/sysv/sysv4 ;; | |
102 | none) | |
103 | base_os=standalone ;; | |
104 | *) | |
105 | base_os='' ;; | |
106 | esac | |
107 | ||
108 | # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. | |
109 | tail=$os | |
110 | ostry=$os | |
111 | while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do | |
112 | ostry="$ostry /$o" | |
113 | tail=$o | |
114 | done | |
115 | o=`echo $tail | sed 's/[0-9]*$//'` | |
116 | if test $o != $tail; then | |
117 | ostry="$ostry /$o" | |
118 | fi | |
119 | ||
120 | # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. | |
121 | base= | |
122 | tail=$base_os | |
123 | while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do | |
124 | set $b | |
125 | base="$base /$1" | |
126 | tail="$2" | |
127 | done | |
128 | ||
129 | # For sparc/sparc9, try sparc/sparc9 and then sparc. | |
130 | mach= | |
131 | tail=$machine | |
132 | while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do | |
133 | set $m | |
134 | mach="$mach /$1" | |
135 | tail="$2" | |
136 | done | |
137 | ||
138 | dnl We are done with glob and regexp uses of [ and ]; return to autoconf. | |
139 | changequote([,])dnl | |
140 | ||
141 | # Find what sysdep directories exist. | |
142 | sysnames= | |
143 | for b in $base ''; do | |
144 | for m0 in $mach ''; do | |
145 | for v in /$vendor ''; do | |
146 | for o in /$ostry ''; do | |
147 | for m in $mach ''; do | |
148 | try="$m0$b$v$o$m" | |
149 | if test -d $sysdep_dir$try; then | |
150 | sysnames="$sysnames $try" | |
151 | { test -n "$o" || test -n "$b"; } && os_used=t | |
152 | { test -n "$m" || test -n "$m0"; } && machine_used=t | |
153 | fi | |
154 | done | |
155 | done | |
156 | done | |
157 | done | |
158 | done | |
159 | ||
160 | if test -z "$os_used" && test "$os" != none; then | |
161 | AC_MSG_ERROR(Operating system $os is not supported.) | |
162 | fi | |
163 | if test -z "$machine_used" && test "$machine" != none; then | |
164 | AC_MSG_ERROR(The $machine is not supported.) | |
165 | fi | |
166 | ||
167 | # We have now validated the configuration. | |
168 | ||
169 | # Remove the leading slashes. | |
170 | sysnames="`echo $sysnames | sed -e 's@^/@@' -e 's@ /@ @g'`" | |
171 | ||
172 | # Prepend the machine's FPU directory unless --without-fp. | |
173 | if test "$with_fp" = no; then | |
174 | fpu_dirs= | |
175 | for m in $mach; do | |
176 | if test -d $sysdep_dir$m/fpu; then | |
177 | fpu_dirs="$fpu_dirs $m/fpu" | |
178 | fi | |
179 | done | |
180 | sysnames="`echo $fpu_dirs | sed -e 's,^/,,' -e 's, /,,g'` $sysnames" | |
181 | fi | |
182 | ||
183 | # Expand the list of system names into a full list of directories | |
184 | # from each element's parent name and Implies file (if present). | |
185 | set $sysnames | |
186 | while test $# -gt 0; do | |
187 | name=$1 | |
188 | shift | |
189 | ||
190 | if test -f $sysdep_dir/$name/Implies; then | |
191 | # Collect more names from the `Implies' file (removing comments). | |
192 | implied="`sed 's/#.*$//' < $sysdep_dir/$name/Implies`" | |
193 | for x in $implied; do | |
194 | test -d $sysdep_dir/$x || echo "Warning: $name implies nonexistent $x">&2 | |
195 | done | |
196 | else | |
197 | implied= | |
198 | fi | |
199 | ||
200 | # Add NAME to the list of names. | |
201 | names="$names $name" | |
202 | ||
203 | # Find the parent of NAME, using the empty string if it has none. | |
204 | changequote(,)dnl | |
205 | parent="`echo $name | sed -n -e '/\//!q' -e 's=/[^/]*$==p'`" | |
206 | changequote([,])dnl | |
207 | ||
208 | # Add the names implied by NAME, and NAME's parent (if it has one), to | |
209 | # the list of names to be processed (the argument list). We prepend the | |
210 | # implied names to the list and append the parent. We want implied | |
211 | # directories to come before further directories inferred from the | |
212 | # configuration components; this ensures that for sysv4, unix/common | |
213 | # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) | |
214 | # after sysv4). | |
215 | sysnames="`echo $implied $* $parent`" | |
216 | test -n "$sysnames" && set $sysnames | |
217 | done | |
218 | ||
219 | # Add the default directories. | |
220 | names="$names generic stub" | |
221 | ||
222 | # Now uniquize the list. | |
223 | seen= | |
224 | sysnames= | |
225 | for name in $names; do | |
226 | if echo "$seen" | fgrep -x $name >/dev/null; then | |
227 | # Already in the list. | |
228 | true; | |
229 | else | |
230 | # A new one. | |
231 | if test -z "$seen"; then | |
232 | seen="$name" sysnames="$name" | |
233 | else | |
234 | seen="$seen | |
235 | $name" | |
236 | sysnames="$sysnames $name" | |
237 | fi | |
238 | fi | |
239 | done | |
240 | libc_cv_sysdirs="$sysnames"]) | |
241 | AC_SUBST(sysnames) sysnames="$libc_cv_sysdirs" | |
242 | AC_MSG_RESULT(${sysnames}) | |
243 | ||
244 | case "$host_os" in | |
245 | gnu* | linux* | bsd4.4* | netbsd* | freebsd*) | |
246 | gnu_ld=yes gnu_as=yes | |
247 | esac | |
248 | case "$host_os" in | |
249 | gnu*elf* | linux*elf* | sysv4* | solaris2*) | |
250 | elf=yes | |
251 | esac | |
252 | ||
253 | AC_PROG_INSTALL | |
254 | if test "$INSTALL" = "${srcdir}/install-sh"; then | |
255 | # The makefiles need to use a different form to find it in $srcdir. | |
256 | INSTALL='$(..)./install-sh' | |
257 | fi | |
258 | ||
ff3d7ed3 RM |
259 | AC_CHECK_TOOL(CC, gcc) |
260 | AC_CHECK_TOOL(AR, ar) | |
261 | AC_CHECK_TOOL(RANLIB, ranlib, :) | |
28f540f4 | 262 | AC_PROG_CPP |
28f540f4 RM |
263 | |
264 | AC_MSG_CHECKING(signed size_t type) | |
265 | AC_CACHE_VAL(libc_cv_signed_size_t, [dnl | |
266 | echo '#include <stddef.h> | |
267 | FOOBAR __SIZE_TYPE__ FOOBAR' > conftest.c | |
268 | if eval "$ac_cpp conftest.c 2>/dev/null" \ | |
269 | | grep '^FOOBAR.*unsigned.*FOOBAR$' >/dev/null; then | |
270 | libc_cv_signed_size_t=no | |
271 | else | |
272 | libc_cv_signed_size_t=yes | |
273 | fi | |
274 | rm -f conftest*]) | |
275 | AC_MSG_RESULT($libc_cv_signed_size_t) | |
276 | if test $libc_cv_signed_size_t = yes; then | |
277 | dnl Do this by hand instead of AC_DEFINE so can add #undef to avoid warnings. | |
278 | cat >> confdefs.h <<\EOF | |
279 | #undef __SIZE_TYPE__ | |
280 | #define __SIZE_TYPE__ unsigned | |
281 | EOF | |
282 | fi | |
283 | ||
284 | AC_MSG_CHECKING(libc-friendly stddef.h) | |
285 | AC_CACHE_VAL(libc_cv_friendly_stddef, [dnl | |
286 | AC_TRY_COMPILE(dnl | |
287 | [#define __need_size_t | |
288 | #define __need_wchar_t | |
289 | #include <stddef.h> | |
290 | #define __need_NULL | |
291 | #include <stddef.h>], [size_t size; wchar_t wchar; | |
292 | #ifdef offsetof | |
293 | #error stddef.h ignored __need_* | |
294 | #endif | |
295 | if (&size == NULL || &wchar == NULL) abort ();], | |
296 | libc_cv_friendly_stddef=yes, | |
297 | libc_cv_friendly_stddef=no)]) | |
298 | AC_MSG_RESULT($libc_cv_friendly_stddef) | |
299 | if test $libc_cv_friendly_stddef = yes; then | |
300 | config_vars="$config_vars | |
301 | override stddef.h = # The installed <stddef.h> seems to be libc-friendly." | |
302 | fi | |
303 | ||
304 | AC_MSG_CHECKING(whether we need to use -P to assemble .S files) | |
305 | AC_CACHE_VAL(libc_cv_need_minus_P, [dnl | |
306 | cat > conftest.S <<EOF | |
307 | #include "confdefs.h" | |
308 | /* Nothing whatsoever. */ | |
309 | EOF | |
310 | if ${CC-cc} $CFLAGS -c conftest.S 2>/dev/null; then | |
311 | libc_cv_need_minus_P=no | |
312 | else | |
313 | libc_cv_need_minus_P=yes | |
314 | fi | |
315 | rm -f conftest*]) | |
316 | AC_MSG_RESULT($libc_cv_need_minus_P) | |
317 | if test $libc_cv_need_minus_P = yes; then | |
318 | config_vars="$config_vars | |
319 | asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives." | |
320 | fi | |
321 | ||
322 | # sysdeps configure fragments may set these with files to be linked below. | |
323 | libc_link_dests= | |
324 | libc_link_sources= | |
325 | ||
326 | # Iterate over all the sysdep directories we will use, running their | |
327 | # configure fragments, and looking for a uname implementation. | |
328 | uname= | |
329 | for dir in $sysnames; do | |
330 | if test -r $sysdep_dir/$dir/configure; then | |
331 | AC_MSG_RESULT(running configure fragment for $dir) | |
332 | . $sysdep_dir/$dir/configure | |
333 | fi | |
334 | if test -z "$uname"; then | |
335 | { test -r $sysdep_dir/$dir/uname.c || test -r $sysdep_dir/$dir/uname.S; } \ | |
336 | && uname=$dir | |
337 | fi | |
338 | done | |
339 | ||
340 | AC_LINK_FILES(`echo $libc_link_sources`, `echo $libc_link_dests`) | |
341 | ||
342 | # If we will use the generic uname implementation, we must figure out what | |
343 | # it will say by examining the system, and write the results in config-name.h. | |
344 | if test "$uname" = generic; then | |
345 | ||
346 | changequote(,)dnl | |
347 | uname_sysname=`echo $config_os | sed 's/[0-9.]*$//'` | |
348 | changequote([,])dnl | |
349 | if test $uname_sysname != $config_os; then | |
350 | config_release=`echo $config_os | sed s/$uname_sysname//` | |
351 | fi | |
352 | dnl | |
353 | AC_DEFUN(LIBC_KERNEL_ID, [dnl | |
354 | if test -r /vmunix; then | |
355 | kernel_id=`strings /vmunix | grep UNIX` | |
356 | elif test -r /dynix; then | |
357 | kernel_id=`strings /dynix | grep DYNIX` | |
358 | else | |
359 | kernel_id= | |
360 | fi | |
361 | ])dnl | |
362 | ||
363 | AC_MSG_CHECKING(OS release for uname) | |
364 | AC_CACHE_VAL(libc_cv_uname_release, [dnl | |
365 | AC_REQUIRE([LIBC_KERNEL_ID])dnl | |
366 | changequote(,)dnl | |
367 | kernel_release=`echo "$kernel_id" | sed 's/^[^0-9.]*\([0-9.]*\).*$/\1/'` | |
368 | changequote([,])dnl | |
369 | if test x`echo "$config_release" | sed "s/^$kernel_release//"` \ | |
370 | != x$config_release; then | |
371 | # The configuration release is a substring of the kernel release. | |
372 | libc_cv_uname_release=$kernel_release | |
373 | elif test x$config_release != x; then | |
374 | libc_cv_uname_release=$config_release | |
375 | elif test x$kernel_release != x; then | |
376 | libc_cv_uname_release=$kernel_release | |
377 | else | |
378 | libc_cv_uname_release=unknown | |
379 | fi]) | |
380 | AC_MSG_RESULT($libc_cv_uname_release) | |
381 | uname_release="$libc_cv_uname_release" | |
382 | ||
383 | AC_MSG_CHECKING(OS version for uname) | |
384 | AC_CACHE_VAL(libc_cv_uname_version, [dnl | |
385 | AC_REQUIRE([LIBC_KERNEL_ID])dnl | |
386 | changequote(,)dnl | |
387 | kernel_version=`echo "$kernel_id" | sed 's/^[^#]*#\([0-9]*\).*$/\1/'` | |
388 | changequote([,])dnl | |
389 | if test -n "$kernel_version"; then | |
390 | libc_cv_uname_version="$kernel_version" | |
391 | else | |
392 | libc_cv_uname_version=unknown | |
393 | fi]) | |
394 | AC_MSG_RESULT($libc_cv_uname_version) | |
395 | uname_version="$libc_cv_uname_version" | |
396 | ||
397 | AC_SUBST(uname_sysname) AC_SUBST(uname_release) AC_SUBST(uname_version)dnl | |
398 | config_uname=config-name.h:config-name.in | |
399 | else | |
400 | # For non-generic uname, we don't need to create config-name.h at all. | |
401 | config_uname= | |
402 | fi | |
403 | ||
404 | AC_SUBST(gnu_ld) AC_SUBST(gnu_as) AC_SUBST(elf) AC_SUBST(weak) | |
405 | if test $gnu_ld = yes; then | |
406 | AC_DEFINE(HAVE_GNU_LD) | |
407 | fi | |
408 | if test $gnu_as = yes; then | |
409 | AC_DEFINE(HAVE_GNU_AS) | |
410 | fi | |
411 | if test $elf = yes; then | |
412 | AC_DEFINE(HAVE_ELF) | |
413 | fi | |
414 | if test $weak = yes; then | |
415 | AC_DEFINE(HAVE_WEAK_SYMBOLS) | |
416 | fi | |
417 | ||
ff3d7ed3 RM |
418 | AC_SUBST(shared) |
419 | if test $shared = default; then | |
420 | if test $gnu_ld = yes; then | |
421 | shared=$elf | |
422 | fi | |
423 | fi | |
424 | AC_SUBST(profile) | |
425 | AC_SUBST(omitfp) | |
426 | ||
28f540f4 RM |
427 | |
428 | if test "`(cd $srcdir; pwd)`" = "`pwd`"; then | |
429 | config_makefile= | |
430 | else | |
431 | config_makefile=Makefile | |
432 | fi | |
433 | ||
434 | AC_OUTPUT(config.make ${config_makefile} ${config_uname}, , | |
435 | [echo '$config_vars' >> config.make]) |