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_STRICT_CHECK_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
107 # Like plain AC_CHECK_TOOLS, but require prefix if build!=target.
109 AC_DEFUN([NCN_STRICT_CHECK_TOOLS],
110 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
111 for ncn_progname in $2; do
112 if test -n "$ncn_tool_prefix"; then
113 AC_CHECK_PROG([$1], [${ncn_tool_prefix}${ncn_progname}],
114 [${ncn_tool_prefix}${ncn_progname}], , [$4])
116 if test -z "$ac_cv_prog_$1" && test $build = $host ; then
117 AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
119 test -n "$ac_cv_prog_$1" && break
122 if test -z "$ac_cv_prog_$1" ; then
123 ifelse([$3],[], [set dummy $2
124 if test $build = $host ; then
127 $1="${ncn_tool_prefix}[$]2"
130 ]) []dnl # NCN_STRICT_CHECK_TOOLS
133 # NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
134 # Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.
136 AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],
137 [AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
138 for ncn_progname in $2; do
139 if test -n "$ncn_target_tool_prefix"; then
140 AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],
141 [${ncn_target_tool_prefix}${ncn_progname}], , [$4])
143 if test -z "$ac_cv_prog_$1" && test $build = $target ; then
144 AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
146 test -n "$ac_cv_prog_$1" && break
149 if test -z "$ac_cv_prog_$1" ; then
150 ifelse([$3],[], [set dummy $2
151 if test $build = $target ; then
154 $1="${ncn_target_tool_prefix}[$]2"
157 ]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS
161 # Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which
162 # triggers warnings from the preprocessor. Will be in autoconf 2.58.
163 # For now, using this also overrides header checks to use only the
164 # preprocessor (matches 2.13 behavior; matching 2.58's behavior is a
165 # bit harder from here).
166 # Eventually autoconf will default to checking headers with the compiler
167 # instead, and we'll have to do this differently.
169 AC_DEFUN([AC_PROG_CPP_WERROR],
170 [AC_REQUIRE([AC_PROG_CPP])dnl
171 m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
172 ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
175 # We require the gnatbind program, and a compiler driver that
176 # understands Ada. We use the user's CC setting, already found.
178 # Sets the shell variable have_gnat to yes or no as appropriate, and
179 # substitutes GNATBIND.
180 AC_DEFUN([ACX_PROG_GNAT],
181 [AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
182 AC_REQUIRE([AC_PROG_CC])
183 AC_CHECK_TOOL(GNATBIND, gnatbind, no)
184 AC_CACHE_CHECK([whether compiler driver understands Ada],
185 acx_cv_cc_gcc_supports_ada,
186 [cat >conftest.adb <<EOF
187 procedure conftest is begin null; end conftest;
189 acx_cv_cc_gcc_supports_ada=no
190 # There is a bug in old released versions of GCC which causes the
191 # driver to exit successfully when the appropriate language module
192 # has not been installed. This is fixed in 2.95.4, 3.0.2, and 3.1.
193 # Therefore we must check for the error message as well as an
195 # Other compilers, like HP Tru64 UNIX cc, exit successfully when
196 # given a .adb file, but produce no object file. So we must check
197 # if an object file was really produced to guard against this.
198 errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
199 if test x"$errors" = x && test -f conftest.$ac_objext; then
200 acx_cv_cc_gcc_supports_ada=yes
204 if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
211 dnl 'make compare' can be significantly faster, if cmp itself can
212 dnl skip bytes instead of using tail. The test being performed is
213 dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
214 dnl but we need to sink errors and handle broken shells. We also test
215 dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
216 dnl accepted by cmp on some systems.
217 AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],
218 [AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,
221 gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'
222 if cmp t1 t2 2 2 > /dev/null 2>&1; then
223 if cmp t1 t2 1 1 > /dev/null 2>&1; then
226 gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'
229 if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then
230 if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then
233 gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'
238 do_compare="$gcc_cv_prog_cmp_skip"
242 dnl See whether we can include both string.h and strings.h.
243 AC_DEFUN([ACX_HEADER_STRING],
244 [AC_CACHE_CHECK([whether string.h and strings.h may both be included],
245 gcc_cv_header_string,
246 [AC_TRY_COMPILE([#include <string.h>
247 #include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])
248 if test $gcc_cv_header_string = yes; then
249 AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])
253 dnl See if stdbool.h properly defines bool and true/false.
254 dnl Check whether _Bool is built-in.
255 AC_DEFUN([ACX_HEADER_STDBOOL],
256 [AC_CACHE_CHECK([for working stdbool.h],
257 ac_cv_header_stdbool_h,
258 [AC_TRY_COMPILE([#include <stdbool.h>],
260 ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])
261 if test $ac_cv_header_stdbool_h = yes; then
262 AC_DEFINE(HAVE_STDBOOL_H, 1,
263 [Define if you have a working <stdbool.h> header file.])
265 AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool,
268 gcc_cv_c__bool=yes, gcc_cv_c__bool=no)
270 if test $gcc_cv_c__bool = yes; then
271 AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.])
275 dnl See if hard links work and if not, try to substitute $1 or simple copy.
276 AC_DEFUN([ACX_PROG_LN],
277 [AC_MSG_CHECKING(whether ln works)
278 AC_CACHE_VAL(acx_cv_prog_LN,
279 [rm -f conftestdata_t
281 if ln conftestdata_f conftestdata_t 2>/dev/null
287 rm -f conftestdata_f conftestdata_t
289 if test $acx_cv_prog_LN = no; then
290 LN="ifelse([$1],,cp,[$1])"
291 AC_MSG_RESULT([no, using $LN])