1 # Autoconf M4 include file defining utility macros for complex Canadian
5 dnl # _GCC_TOPLEV_NONCANONICAL_BUILD
6 dnl # $build_alias or canonical $build if blank.
7 dnl # Used when we would use $build_alias, but empty is not OK.
8 AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_BUILD],
9 [AC_REQUIRE([AC_CANONICAL_BUILD]) []dnl
10 case ${build_alias} in
11 "") build_noncanonical=${build} ;;
12 *) build_noncanonical=${build_alias} ;;
14 ]) []dnl # _GCC_TOPLEV_NONCANONICAL_BUILD
17 dnl # _GCC_TOPLEV_NONCANONICAL_HOST
18 dnl # $host_alias, or $build_noncanonical if blank.
19 dnl # Used when we would use $host_alias, but empty is not OK.
20 AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_HOST],
21 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
23 "") host_noncanonical=${build_noncanonical} ;;
24 *) host_noncanonical=${host_alias} ;;
26 ]) []dnl # _GCC_TOPLEV_NONCANONICAL_HOST
29 dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
30 dnl # $target_alias or $host_noncanonical if blank.
31 dnl # Used when we would use $target_alias, but empty is not OK.
32 AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET],
33 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
34 case ${target_alias} in
35 "") target_noncanonical=${host_noncanonical} ;;
36 *) target_noncanonical=${target_alias} ;;
38 ]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
41 dnl # ACX_NONCANONICAL_BUILD
42 dnl # Like underscored version, but AC_SUBST's.
43 AC_DEFUN([ACX_NONCANONICAL_BUILD],
44 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
45 AC_SUBST(build_noncanonical)
46 ]) []dnl # ACX_NONCANONICAL_BUILD
49 dnl # ACX_NONCANONICAL_HOST
50 dnl # Like underscored version, but AC_SUBST's.
51 AC_DEFUN([ACX_NONCANONICAL_HOST],
52 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
53 AC_SUBST(host_noncanonical)
54 ]) []dnl # ACX_NONCANONICAL_HOST
57 dnl # ACX_NONCANONICAL_TARGET
58 dnl # Like underscored version, but AC_SUBST's.
59 AC_DEFUN([ACX_NONCANONICAL_TARGET],
60 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
61 AC_SUBST(target_noncanonical)
62 ]) []dnl # ACX_NONCANONICAL_TARGET
65 dnl # GCC_TOPLEV_SUBDIRS
66 dnl # GCC & friends build 'build', 'host', and 'target' tools. These must
67 dnl # be separated into three well-known subdirectories of the build directory:
68 dnl # build_subdir, host_subdir, and target_subdir. The values are determined
69 dnl # here so that they can (theoretically) be changed in the future. They
70 dnl # were previously reproduced across many different files.
72 dnl # This logic really amounts to very little with autoconf 2.13; it will
73 dnl # amount to a lot more with autoconf 2.5x.
74 AC_DEFUN([GCC_TOPLEV_SUBDIRS],
75 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
76 AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
78 # post-stage1 host modules use a different CC_FOR_BUILD so, in order to
79 # have matching libraries, they should use host libraries: Makefile.tpl
80 # arranges to pass --with-build-libsubdir=$(HOST_SUBDIR).
81 # However, they still use the build modules, because the corresponding
82 # host modules (e.g. bison) are only built for the host when bootstrap
84 # - build_subdir is where we find build modules, and never changes.
85 # - build_libsubdir is where we find build libraries, and can be overridden.
87 # Prefix 'build-' so this never conflicts with target_subdir.
88 build_subdir="build-${build_noncanonical}"
89 AC_ARG_WITH(build-libsubdir,
90 [ --with-build-libsubdir=[DIR] Directory where to find libraries for build system],
91 build_libsubdir="$withval",
92 build_libsubdir="$build_subdir")
93 # --srcdir=. covers the toplevel, while "test -d" covers the subdirectories
94 if ( test $srcdir = . && test -d gcc ) \
95 || test -d $srcdir/../host-${host_noncanonical}; then
96 host_subdir="host-${host_noncanonical}"
101 target_subdir=${target_noncanonical}
102 AC_SUBST([build_libsubdir]) []dnl
103 AC_SUBST([build_subdir]) []dnl
104 AC_SUBST([host_subdir]) []dnl
105 AC_SUBST([target_subdir]) []dnl
106 ]) []dnl # GCC_TOPLEV_SUBDIRS
110 # _NCN_TOOL_PREFIXES: Some stuff that oughtta be done in AC_CANONICAL_SYSTEM
112 # These demand that AC_CANONICAL_SYSTEM be called beforehand.
113 AC_DEFUN([_NCN_TOOL_PREFIXES],
115 test -n "$host_alias" && ncn_tool_prefix=$host_alias-
116 ncn_target_tool_prefix=
117 test -n "$target_alias" && ncn_target_tool_prefix=$target_alias-
118 ]) []dnl # _NCN_TOOL_PREFIXES
121 # NCN_STRICT_CHECK_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
122 # Like plain AC_CHECK_TOOLS, but require prefix if build!=host.
124 AC_DEFUN([NCN_STRICT_CHECK_TOOLS],
125 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
126 for ncn_progname in $2; do
127 if test -n "$ncn_tool_prefix"; then
128 AC_CHECK_PROG([$1], [${ncn_tool_prefix}${ncn_progname}],
129 [${ncn_tool_prefix}${ncn_progname}], , [$4])
131 if test -z "$ac_cv_prog_$1" && test $build = $host ; then
132 AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
134 test -n "$ac_cv_prog_$1" && break
137 if test -z "$ac_cv_prog_$1" ; then
138 ifelse([$3],[], [set dummy $2
139 if test $build = $host ; then
142 $1="${ncn_tool_prefix}[$]2"
145 ]) []dnl # NCN_STRICT_CHECK_TOOLS
148 # NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
149 # Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.
151 AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],
152 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
153 if test -n "$with_build_time_tools"; then
154 for ncn_progname in $2; do
155 AC_MSG_CHECKING([for ${ncn_progname} in $with_build_time_tools])
156 if test -x $with_build_time_tools/${ncn_progname}; then
157 ac_cv_prog_$1=$with_build_time_tools/${ncn_progname}
166 if test -z "$ac_cv_prog_$1"; then
167 for ncn_progname in $2; do
168 if test -n "$ncn_target_tool_prefix"; then
169 AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],
170 [${ncn_target_tool_prefix}${ncn_progname}], , [$4])
172 if test -z "$ac_cv_prog_$1" && test $build = $target ; then
173 AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
175 test -n "$ac_cv_prog_$1" && break
179 if test -z "$ac_cv_prog_$1" ; then
180 ifelse([$3],[], [set dummy $2
181 if test $build = $target ; then
184 $1="${ncn_target_tool_prefix}[$]2"
187 ]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS
190 # Backported from Autoconf 2.5x; can go away when and if
191 # we switch. Put the OS path separator in $PATH_SEPARATOR.
192 AC_DEFUN([ACX_PATH_SEP], [
193 # The user is always right.
194 if test "${PATH_SEPARATOR+set}" != set; then
195 echo "#! /bin/sh" >conf$$.sh
196 echo "exit 0" >>conf$$.sh
198 if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
208 AC_DEFUN([ACX_TOOL_DIRS], [
209 AC_REQUIRE([ACX_PATH_SEP])
210 if test "x$exec_prefix" = xNONE; then
211 if test "x$prefix" = xNONE; then
212 gcc_cv_tool_prefix=$ac_default_prefix
214 gcc_cv_tool_prefix=$prefix
217 gcc_cv_tool_prefix=$exec_prefix
220 # If there is no compiler in the tree, use the PATH only. In any
221 # case, if there is no compiler in the tree nobody should use
222 # AS_FOR_TARGET and LD_FOR_TARGET.
223 if test x$host = x$build && test -f $srcdir/gcc/BASE-VER; then
224 gcc_version=`cat $srcdir/gcc/BASE-VER`
225 gcc_cv_tool_dirs="$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
226 gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical$PATH_SEPARATOR"
227 gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
228 gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical$PATH_SEPARATOR"
229 gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
230 gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin$PATH_SEPARATOR"
235 if test x$build = x$target && test -n "$md_exec_prefix"; then
236 gcc_cv_tool_dirs="$gcc_cv_tool_dirs$md_exec_prefix$PATH_SEPARATOR"
239 ]) []dnl # ACX_TOOL_DIRS
241 # ACX_HAVE_GCC_FOR_TARGET
242 # Check if the variable GCC_FOR_TARGET really points to a GCC binary.
243 AC_DEFUN([ACX_HAVE_GCC_FOR_TARGET], [
244 cat > conftest.c << \EOF
249 if ($GCC_FOR_TARGET -E conftest.c | grep gcc_yay) > /dev/null 2>&1; then
250 have_gcc_for_target=yes
252 GCC_FOR_TARGET=${ncn_target_tool_prefix}gcc
253 have_gcc_for_target=no
258 # ACX_CHECK_INSTALLED_TARGET_TOOL(VAR, PROG)
259 # Searching for installed target binutils. We need to take extra care,
260 # else we may find the wrong assembler, linker, etc., and lose.
262 # First try --with-build-time-tools, if specified.
264 # For build != host, we ask the installed GCC for the name of the tool it
265 # uses, and accept it if it is an absolute path. This is because the
266 # only good choice for a compiler is the same GCC version that is being
267 # installed (or we couldn't make target libraries), and we assume that
268 # on the host system we'll have not only the same GCC version, but also
269 # the same binutils version.
271 # For build == host, search the same directories that the installed
272 # compiler will search. We used to do this for the assembler, linker,
273 # and nm only; for simplicity of configuration, however, we extend this
274 # criterion to tools (such as ar and ranlib) that are never invoked by
275 # the compiler, to avoid mismatches.
277 # Also note we have to check MD_EXEC_PREFIX before checking the user's path
278 # if build == target. This makes the most sense only when bootstrapping,
279 # but we also do so when build != host. In this case, we hope that the
280 # build and host systems will have similar contents of MD_EXEC_PREFIX.
282 # If we do not find a suitable binary, then try the user's path.
284 AC_DEFUN([ACX_CHECK_INSTALLED_TARGET_TOOL], [
285 AC_REQUIRE([ACX_TOOL_DIRS])
286 AC_REQUIRE([ACX_HAVE_GCC_FOR_TARGET])
287 if test -z "$ac_cv_path_$1" ; then
288 if test -n "$with_build_time_tools"; then
289 AC_MSG_CHECKING([for $2 in $with_build_time_tools])
290 if test -x $with_build_time_tools/$2; then
291 $1=`cd $with_build_time_tools && pwd`/$2
293 AC_MSG_RESULT([$ac_cv_path_$1])
297 elif test $build != $host && test $have_gcc_for_target = yes; then
298 $1=`$GCC_FOR_TARGET --print-prog-name=$2`
303 if test -z "$ac_cv_path_$1" ; then
304 AC_PATH_PROG([$1], [$2], [], [$gcc_cv_tool_dirs])
306 if test -z "$ac_cv_path_$1" ; then
307 NCN_STRICT_CHECK_TARGET_TOOLS([$1], [$2])
311 ]) []dnl # ACX_CHECK_INSTALLED_TARGET_TOOL
315 # Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which
316 # triggers warnings from the preprocessor. Will be in autoconf 2.58.
317 # For now, using this also overrides header checks to use only the
318 # preprocessor (matches 2.13 behavior; matching 2.58's behavior is a
319 # bit harder from here).
320 # Eventually autoconf will default to checking headers with the compiler
321 # instead, and we'll have to do this differently.
323 AC_DEFUN([AC_PROG_CPP_WERROR],
324 [AC_REQUIRE([AC_PROG_CPP])dnl
325 m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
326 ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
329 # We require the gnatbind program, and a compiler driver that
330 # understands Ada. We use the user's CC setting, already found.
332 # Sets the shell variable have_gnat to yes or no as appropriate, and
333 # substitutes GNATBIND.
334 AC_DEFUN([ACX_PROG_GNAT],
335 [AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
336 AC_REQUIRE([AC_PROG_CC])
337 AC_CHECK_TOOL(GNATBIND, gnatbind, no)
338 AC_CACHE_CHECK([whether compiler driver understands Ada],
339 acx_cv_cc_gcc_supports_ada,
340 [cat >conftest.adb <<EOF
341 procedure conftest is begin null; end conftest;
343 acx_cv_cc_gcc_supports_ada=no
344 # There is a bug in old released versions of GCC which causes the
345 # driver to exit successfully when the appropriate language module
346 # has not been installed. This is fixed in 2.95.4, 3.0.2, and 3.1.
347 # Therefore we must check for the error message as well as an
349 # Other compilers, like HP Tru64 UNIX cc, exit successfully when
350 # given a .adb file, but produce no object file. So we must check
351 # if an object file was really produced to guard against this.
352 errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
353 if test x"$errors" = x && test -f conftest.$ac_objext; then
354 acx_cv_cc_gcc_supports_ada=yes
358 if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
365 dnl 'make compare' can be significantly faster, if cmp itself can
366 dnl skip bytes instead of using tail. The test being performed is
367 dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
368 dnl but we need to sink errors and handle broken shells. We also test
369 dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
370 dnl accepted by cmp on some systems.
371 AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],
372 [AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,
375 gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'
376 if cmp t1 t2 2 2 > /dev/null 2>&1; then
377 if cmp t1 t2 1 1 > /dev/null 2>&1; then
380 gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'
383 if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then
384 if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then
387 gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'
392 do_compare="$gcc_cv_prog_cmp_skip"
396 dnl See whether we can include both string.h and strings.h.
397 AC_DEFUN([ACX_HEADER_STRING],
398 [AC_CACHE_CHECK([whether string.h and strings.h may both be included],
399 gcc_cv_header_string,
400 [AC_TRY_COMPILE([#include <string.h>
401 #include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])
402 if test $gcc_cv_header_string = yes; then
403 AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])
407 dnl See if stdbool.h properly defines bool and true/false.
408 dnl Check whether _Bool is built-in.
409 AC_DEFUN([ACX_HEADER_STDBOOL],
410 [AC_CACHE_CHECK([for working stdbool.h],
411 ac_cv_header_stdbool_h,
412 [AC_TRY_COMPILE([#include <stdbool.h>],
414 ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])
415 if test $ac_cv_header_stdbool_h = yes; then
416 AC_DEFINE(HAVE_STDBOOL_H, 1,
417 [Define if you have a working <stdbool.h> header file.])
419 AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool,
422 gcc_cv_c__bool=yes, gcc_cv_c__bool=no)
424 if test $gcc_cv_c__bool = yes; then
425 AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.])
429 dnl See if hard links work and if not, try to substitute $1 or simple copy.
430 AC_DEFUN([ACX_PROG_LN],
431 [AC_MSG_CHECKING(whether ln works)
432 AC_CACHE_VAL(acx_cv_prog_LN,
433 [rm -f conftestdata_t
435 if ln conftestdata_f conftestdata_t 2>/dev/null
441 rm -f conftestdata_f conftestdata_t
443 if test $acx_cv_prog_LN = no; then
444 LN="ifelse([$1],,cp,[$1])"
445 AC_MSG_RESULT([no, using $LN])
453 dnl GCC_TARGET_TOOL(PROGRAM, TARGET-VAR, HOST-VAR, IN-TREE-TOOL, LANGUAGE)
454 AC_DEFUN([GCC_TARGET_TOOL],
455 [AC_MSG_CHECKING(where to find the target $1)
456 if test "x${build}" != "x${host}" ; then
457 if expr "x[$]$2" : "x/" > /dev/null; then
458 # We already found the complete path
459 AC_MSG_RESULT(pre-installed in `dirname [$]$2`)
461 # Canadian cross, just use what we found
462 AC_MSG_RESULT(pre-installed)
467 case " ${configdirs} " in
468 *" patsubst([$4], [/.*], []) "*) ;;
472 [case ,${enable_languages}, in
476 if test $ok = yes; then
477 # An in-tree tool is available and we can use it
478 $2='$$r/$(HOST_SUBDIR)/$4'
479 AC_MSG_RESULT(just compiled)
480 el])if expr "x[$]$2" : "x/" > /dev/null; then
481 # We already found the complete path
482 AC_MSG_RESULT(pre-installed in `dirname [$]$2`)
483 elif test "x$target" = "x$host"; then
484 # We can use an host tool
486 AC_MSG_RESULT(host tool)
488 # We need a cross tool
489 AC_MSG_RESULT(pre-installed)