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=${target_alias} ;;
38 ]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
41 dnl # ACX_NONCANONICAL_BUILD
42 dnl # Like underscored version, but AC_SUBST's.
43 AC_DEFUN([ACX_NONCANONICAL_BUILD],
44 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
45 AC_SUBST(build_noncanonical)
46 ]) []dnl # ACX_NONCANONICAL_BUILD
49 dnl # ACX_NONCANONICAL_HOST
50 dnl # Like underscored version, but AC_SUBST's.
51 AC_DEFUN([ACX_NONCANONICAL_HOST],
52 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
53 AC_SUBST(host_noncanonical)
54 ]) []dnl # ACX_NONCANONICAL_HOST
57 dnl # ACX_NONCANONICAL_TARGET
58 dnl # Like underscored version, but AC_SUBST's.
59 AC_DEFUN([ACX_NONCANONICAL_TARGET],
60 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
61 AC_SUBST(target_noncanonical)
62 ]) []dnl # ACX_NONCANONICAL_TARGET
65 dnl # GCC_TOPLEV_SUBDIRS
66 dnl # GCC & friends build 'build', 'host', and 'target' tools. These must
67 dnl # be separated into three well-known subdirectories of the build directory:
68 dnl # build_subdir, host_subdir, and target_subdir. The values are determined
69 dnl # here so that they can (theoretically) be changed in the future. They
70 dnl # were previously reproduced across many different files.
72 dnl # This logic really amounts to very little with autoconf 2.13; it will
73 dnl # amount to a lot more with autoconf 2.5x.
74 AC_DEFUN([GCC_TOPLEV_SUBDIRS],
75 [AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
76 AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
77 # Prefix 'build-' so this never conflicts with target_subdir.
78 build_subdir="build-${build_noncanonical}"
79 # --srcdir=. covers the toplevel, while "test -d" covers the subdirectories
80 if ( test $srcdir = . && test -d gcc ) \
81 || test -d $srcdir/../host-${host_noncanonical}; then
82 host_subdir="host-${host_noncanonical}"
87 target_subdir=${target_noncanonical}
88 AC_SUBST([build_subdir]) []dnl
89 AC_SUBST([host_subdir]) []dnl
90 AC_SUBST([target_subdir]) []dnl
91 ]) []dnl # GCC_TOPLEV_SUBDIRS
95 # _NCN_TOOL_PREFIXES: Some stuff that oughtta be done in AC_CANONICAL_SYSTEM
97 # These demand that AC_CANONICAL_SYSTEM be called beforehand.
98 AC_DEFUN([_NCN_TOOL_PREFIXES],
100 test -n "$host_alias" && ncn_tool_prefix=$host_alias-
101 ncn_target_tool_prefix=
102 test -n "$target_alias" && ncn_target_tool_prefix=$target_alias-
103 ]) []dnl # _NCN_TOOL_PREFIXES
106 # NCN_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
107 # Like AC_CHECK_TOOL, but tries a prefix of the target, not the host.
108 # Code is pretty much lifted from autoconf2.53.
110 AC_DEFUN([NCN_CHECK_TARGET_TOOL],
111 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
112 if test -n "$ncn_target_tool_prefix"; then
113 AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
114 [${ncn_target_tool_prefix}$2], , [$4])
116 if test -z "$ac_cv_prog_$1" ; then
118 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [$3], [$4])
123 ]) []dnl # NCN_CHECK_TARGET_TOOL
127 # NCN_STRICT_CHECK_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
128 # Like AC_CHECK_TOOL, but requires the prefix if build!=host.
130 AC_DEFUN([NCN_STRICT_CHECK_TOOL],
131 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
132 if test -n "$ncn_tool_prefix"; then
133 AC_CHECK_PROG([$1], [${ncn_tool_prefix}$2],
134 [${ncn_tool_prefix}$2], , [$4])
136 if test -z "$ac_cv_prog_$1" ; then
137 if test $build = $host ; then
139 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
142 $1="ifelse([$3],[],[${ncn_tool_prefix}$2],[$3])"
147 ]) []dnl # NCN_STRICT_CHECK_TOOL
151 # NCN_STRICT_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
152 # Like NCN_CHECK_TARGET_TOOL, but requires the prefix if build!=target.
154 AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOL],
155 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
156 if test -n "$ncn_target_tool_prefix"; then
157 AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
158 [${ncn_target_tool_prefix}$2], , [$4])
160 if test -z "$ac_cv_prog_$1" ; then
161 if test $build = $target ; then
163 AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
166 $1="ifelse([$3],[],[${ncn_target_tool_prefix}$2],[$3])"
171 ]) []dnl # NCN_STRICT_CHECK_TARGET_TOOL
175 # Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which
176 # triggers warnings from the preprocessor. Will be in autoconf 2.58.
177 # For now, using this also overrides header checks to use only the
178 # preprocessor (matches 2.13 behavior; matching 2.58's behavior is a
179 # bit harder from here).
180 # Eventually autoconf will default to checking headers with the compiler
181 # instead, and we'll have to do this differently.
183 AC_DEFUN([AC_PROG_CPP_WERROR],
184 [AC_REQUIRE([AC_PROG_CPP])dnl
185 m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
186 ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
189 # We require the gnatbind program, and a compiler driver that
190 # understands Ada. We use the user's CC setting, already found.
192 # Sets the shell variable have_gnat to yes or no as appropriate, and
193 # substitutes GNATBIND.
194 AC_DEFUN([ACX_PROG_GNAT],
195 [AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
196 AC_REQUIRE([AC_PROG_CC])
197 AC_CHECK_TOOL(GNATBIND, gnatbind, no)
198 AC_CACHE_CHECK([whether compiler driver understands Ada],
199 acx_cv_cc_gcc_supports_ada,
200 [cat >conftest.adb <<EOF
201 procedure conftest is begin null; end conftest;
203 acx_cv_cc_gcc_supports_ada=no
204 # There is a bug in old released versions of GCC which causes the
205 # driver to exit successfully when the appropriate language module
206 # has not been installed. This is fixed in 2.95.4, 3.0.2, and 3.1.
207 # Therefore we must check for the error message as well as an
209 # Other compilers, like HP Tru64 UNIX cc, exit successfully when
210 # given a .adb file, but produce no object file. So we must check
211 # if an object file was really produced to guard against this.
212 errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
213 if test x"$errors" = x && test -f conftest.$ac_objext; then
214 acx_cv_cc_gcc_supports_ada=yes
218 if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
225 dnl 'make compare' can be significantly faster, if cmp itself can
226 dnl skip bytes instead of using tail. The test being performed is
227 dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
228 dnl but we need to sink errors and handle broken shells. We also test
229 dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
230 dnl accepted by cmp on some systems.
231 AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],
232 [AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,
235 gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'
236 if cmp t1 t2 2 2 > /dev/null 2>&1; then
237 if cmp t1 t2 1 1 > /dev/null 2>&1; then
240 gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'
243 if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then
244 if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then
247 gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'
252 do_compare="$gcc_cv_prog_cmp_skip"
256 dnl See whether we can include both string.h and strings.h.
257 AC_DEFUN([ACX_HEADER_STRING],
258 [AC_CACHE_CHECK([whether string.h and strings.h may both be included],
259 gcc_cv_header_string,
260 [AC_TRY_COMPILE([#include <string.h>
261 #include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])
262 if test $gcc_cv_header_string = yes; then
263 AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])
267 dnl See if stdbool.h properly defines bool and true/false.
268 dnl Check whether _Bool is built-in.
269 AC_DEFUN([ACX_HEADER_STDBOOL],
270 [AC_CACHE_CHECK([for working stdbool.h],
271 ac_cv_header_stdbool_h,
272 [AC_TRY_COMPILE([#include <stdbool.h>],
274 ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])
275 if test $ac_cv_header_stdbool_h = yes; then
276 AC_DEFINE(HAVE_STDBOOL_H, 1,
277 [Define if you have a working <stdbool.h> header file.])
279 AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool,
282 gcc_cv_c__bool=yes, gcc_cv_c__bool=no)
284 if test $gcc_cv_c__bool = yes; then
285 AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.])
289 dnl See if hard links work and if not, try to substitute $1 or simple copy.
290 AC_DEFUN([ACX_PROG_LN],
291 [AC_MSG_CHECKING(whether ln works)
292 AC_CACHE_VAL(acx_cv_prog_LN,
293 [rm -f conftestdata_t
295 if ln conftestdata_f conftestdata_t 2>/dev/null
301 rm -f conftestdata_f conftestdata_t
303 if test $acx_cv_prog_LN = no; then
304 LN="ifelse([$1],,cp,[$1])"
305 AC_MSG_RESULT([no, using $LN])