1 # Configure template for GNU Bison. -*-Autoconf-*-
3 # Copyright (C) 2001-2015, 2018-2022 Free Software Foundation, Inc.
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <https://www.gnu.org/licenses/>.
19 m4_pattern_forbid([^_?(gl_[A-Z]|AX_|BISON_)])
20 m4_pattern_allow([^BISON_USE_NLS$])
23 m4_esyscmd([build-aux/git-version-gen .tarball-version]),
26 [https://www.gnu.org/software/bison/])
27 AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2022])
28 AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
29 [The copyright year for this package])
31 AC_CONFIG_AUX_DIR([build-aux])
32 AC_CONFIG_MACRO_DIR([m4])
34 # When we move to Automake 1.16, simplify examples/c/reccalc/local.mk.
35 # Our CI build the packages on Bionic, which has only Automake 1.15.
37 # We want gnits strictness only when rolling a stable release. For
38 # release candidates, we use version strings like 2.4.3_rc1, but gnits
39 # doesn't like that, so we let the underscore disable gnits. Between
40 # releases, we want to be able run make dist without being required to
41 # add a bogus NEWS entry. In that case, the version string
42 # automatically contains a dash, which we also let disable gnits.
43 AM_INIT_AUTOMAKE([1.15 dist-lzip dist-xz nostdinc
44 color-tests parallel-tests
46 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
48 AM_SILENT_RULES([yes])
49 AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
51 # Checks for the compiler.
55 # Gnulib (early checks).
58 # We want ostream_printf and hyperlink support.
59 gl_LIBTEXTSTYLE_OPTIONAL([0.20.5])
61 # Gnulib uses '#pragma GCC diagnostic push' to silence some
62 # warnings, but older gcc doesn't support this.
63 AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
64 [lv_cv_gcc_pragma_push_works], [
66 CFLAGS='-Wunknown-pragmas -Werror'
67 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
68 #pragma GCC diagnostic push
69 #pragma GCC diagnostic pop
71 [lv_cv_gcc_pragma_push_works=yes],
72 [lv_cv_gcc_pragma_push_works=no])
76 gl_WARN_ADD([-fno-exceptions], [NO_EXCEPTIONS_CXXFLAGS])
84 AM_CONDITIONAL([ENABLE_CXX11], [test x"$CXX11_CXXFLAGS" != x])
85 AM_CONDITIONAL([ENABLE_CXX14], [test x"$CXX14_CXXFLAGS" != x])
88 AC_ARG_ENABLE([gcc-warnings],
89 [ --enable-gcc-warnings turn on lots of GCC warnings (not recommended).
90 Also, issue synclines from the examples/ to
91 the corresponding source in the Texinfo doc.],
92 [case $enable_gcc_warnings in
94 *) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
96 [enable_gcc_warnings=no])
97 AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
98 if test "$enable_gcc_warnings" = yes; then
99 # -Wno-tautological-constant-out-of-range-compare for Clang 3.3 and
100 # 3.4 on GNU/Linux that choke on intprops.h's INT_MULTIPLY_WRAPV,
105 # 1669 warnings warnings_default =
106 # ../src/complain.c(318): error #188: enumerated type mixed with another type
107 # 1670 Wconflicts_sr | Wconflicts_rr | Wdeprecated | Wother;
110 # 1673../src/complain.c(393): error #188: enumerated type mixed with another type
111 # 1674 warnings w = 1 << wbit;
116 # char const *usefulness
117 # = rule_useless_in_grammar_p (&rules[r]) ? "useless-in-grammar"
118 # : rule_useless_in_parser_p (&rules[r]) ? "useless-in-parser"
123 # error #3179: deprecated conversion of string literal to char* (should be const char*)
125 # ICC: -wr2259 (that's in C, in spite of what the error messages which seems to be about C++).
126 # error #2259: non-pointer conversion from "int" to "yybool={signed char}" may lose significant bits
127 # yybool yynormal YY_ATTRIBUTE_UNUSED = yystackp->yysplitPoint == YY_NULLPTR;
129 warn_common='-Wall -Wextra
130 -Wcast-align -Wchar-subscripts
131 -fparse-all-comments -Wdocumentation
132 -Wformat -Wimplicit-fallthrough -Wmismatched-dealloc -Wnull-dereference
133 -Wno-sign-compare -Wno-tautological-constant-out-of-range-compare
134 -Wpointer-arith -Wshadow -Wstrict-aliasing
136 -wr188 -wr2259 -wr3179'
137 warn_c='-Wbad-function-cast
140 warn_cxx='-Wextra-semi -Wnoexcept -Wsubobject-linkage
141 -Wold-style-cast -Wundefined-func-template
143 # Warnings for the test suite only.
145 # -fno-color-diagnostics: Clang's use of colors in the error
146 # messages is confusing the tests looking at the compiler's output
147 # (e.g., synclines.at).
149 # -Wno-keyword-macro: We use the "#define private public" dirty
150 # trick in the test suite to check some private implementation
151 # details for lalr1.cc.
152 warn_tests='-Wundef -pedantic -Wconversion
153 -Wdeprecated -Wsign-compare -Wsign-conversion
154 -Wtautological-constant-out-of-range-compare
155 -fno-color-diagnostics
160 # Clang supports many of GCC's -W options, but only issues warnings
161 # on the ones it does not recognize. In that case, gl_WARN_ADD
162 # thinks the option is supported, and unknown options are then added
163 # to CFLAGS. But then, when -Werror is added in the test suite for
164 # instance, the warning about the unknown option turns into an
167 # This should be addressed by gnulib's gl_WARN_ADD, but in the
168 # meanwhile, turn warnings about unknown options into errors in
169 # CFLAGS, and restore CFLAGS after the tests.
171 gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS])
172 # Accept this warning only if it is not too touchy (e.g., clang 3.3
174 gl_WARN_ADD([-Wunreachable-code], [WARN_CFLAGS],
176 [[if (sizeof (long) < sizeof (int)) return 1;]])])
177 for i in $warn_common $warn_c;
179 gl_WARN_ADD([$i], [WARN_CFLAGS])
181 gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
183 # Warnings for the test suite, and maybe for bison if GCC is modern
185 test $lv_cv_gcc_pragma_push_works = yes &&
186 AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])
188 # Warnings for the test suite only.
189 for i in $warn_tests -Wincompatible-pointer-types;
191 gl_WARN_ADD([$i], [WARN_CFLAGS_TEST])
198 save_CXXFLAGS=$CXXFLAGS
199 gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS])
200 for i in $warn_common $warn_cxx;
202 gl_WARN_ADD([$i], [WARN_CXXFLAGS])
204 # Accept this warning only if it is not too touchy (e.g., clang 3.3
206 gl_WARN_ADD([-Wunreachable-code], [WARN_CXXFLAGS],
208 [[if (sizeof (long) < sizeof (int)) return 1;]])])
209 gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
210 [AC_LANG_PROGRAM([], [nullptr])])
211 # Before GCC6, the pragmas don't work well enough to neutralize
213 gl_WARN_ADD([-Wuseless-cast], [WARN_CXXFLAGS],
214 [AC_LANG_PROGRAM([], [
215 #if defined __GNUC__ && ! defined __ICC && ! defined __clang__ && __GNUC__ < 6
219 gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
220 # Warnings for the test suite only.
221 for i in $warn_tests;
223 gl_WARN_ADD([$i], [WARN_CXXFLAGS_TEST])
225 # Too many compilers complain about Flex generated code.
226 gl_WARN_ADD([-Wno-error], [FLEX_SCANNER_CXXFLAGS])
227 # Clang++ deprecates compiling C.
228 gl_WARN_ADD([-Wno-deprecated], [WNO_DEPRECATED_CXXFLAGS])
229 CXXFLAGS=$save_CXXFLAGS
234 BISON_TEST_FOR_WORKING_C_COMPILER
235 BISON_C_COMPILER_POSIXLY_CORRECT
236 BISON_TEST_FOR_WORKING_CXX_COMPILER
237 BISON_CXX_COMPILER_POSIXLY_CORRECT
240 AC_CHECK_PROGS([DC], [dmd])
241 AC_CHECK_PROGS([DCFLAGS], [-g])
242 AM_CONDITIONAL([ENABLE_D], [test x"$DC" != x])
245 gt_JAVACOMP([1.7], [1.7])
247 AM_CONDITIONAL([ENABLE_JAVA], [test x"$CONF_JAVAC" != x && test x"$CONF_JAVA" != x])
250 AC_ARG_ENABLE([yacc],
251 [AS_HELP_STRING([--disable-yacc],
252 [do not build a yacc command or an -ly library])],
254 AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes])
255 AC_CONFIG_FILES([src/yacc], [chmod +x src/yacc])
257 # Checks for programs.
258 AM_MISSING_PROG([DOT], [dot])
260 if ! "$LEX_IS_FLEX" || test "X$LEX" = X:; then
261 AC_MSG_WARN([bypassing lex because flex is required])
264 AM_CONDITIONAL([FLEX_WORKS], [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT])
265 AM_CONDITIONAL([FLEX_CXX_WORKS],
266 [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT && test $bison_cv_cxx_works = yes])
270 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
271 AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
272 supports -g, otherwise to "".])
273 AC_PATH_PROG([PERL], [perl])
274 AM_MISSING_PROG([HELP2MAN], [help2man])
275 AC_PATH_PROG([XSLTPROC], [xsltproc])
278 # Checks for header files.
279 AC_CHECK_HEADERS_ONCE([locale.h])
281 # Checks for compiler characteristics.
284 # Gnulib (later checks). Putting them here rather than right after
285 # gl_EARLY avoids some redundant checks.
288 # Checks for library functions.
289 AC_CHECK_FUNCS_ONCE([setlocale])
292 # We use gnulib, which is only guaranteed to work properly with the
294 AM_GNU_GETTEXT([external], [need-ngettext])
295 AM_GNU_GETTEXT_VERSION([0.19])
297 AC_CONFIG_FILES([gnulib-po/Makefile.in])
299 # Internationalized parsers.
300 AC_CONFIG_FILES([runtime-po/Makefile.in])
301 # Autoconf macros for packages using internationalized parsers.
302 aclocaldir='${datadir}/aclocal'
303 AC_SUBST([aclocaldir])
305 # Create the benchmark script.
306 AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
308 # Initialize the test suite.
309 AC_CONFIG_TESTDIR(tests)
310 AC_CONFIG_FILES([tests/atlocal])
311 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
313 AC_CHECK_PROGS([VALGRIND], [valgrind])
314 # Use something simpler that $host_os to select our suppression file.
316 case $VALGRIND:$uname in
319 # See README-hacking.md.
322 suppfile=build-aux/$uname.valgrind
323 if test -f "$srcdir/$suppfile"; then
324 AC_SUBST([VALGRIND_OPTS_SUPPRESSION],
325 ["--suppressions=\$(abs_top_srcdir)/$suppfile"])
329 AC_MSG_CHECKING([Valgrind suppression file])
330 AC_MSG_RESULT([$suppfile])
332 # Whether we cannot run the compiled bison.
333 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
335 # Build bistromathic if we have the lib and both readline/readline.h
336 # and readline/history.h.
337 AM_CONDITIONAL([ENABLE_BISTROMATHIC],
338 [test "$gl_cv_lib_readline" != no &&
339 test "$ac_cv_header_readline_readline_h" = yes &&
340 test "$ac_cv_header_readline_history_h" = yes])
342 AM_MISSING_PROG([AUTOM4TE], [autom4te])
343 # Needed by tests/atlocal.in.
346 AC_CONFIG_FILES([Makefile
350 # Fix LIBOBJS to give the Makefile the right file names. Otherwise
351 # compilation works, but with unexpected file names, so clean rules don't
352 # remove the actual files and distcheck fails.
353 AC_CONFIG_COMMANDS_PRE([
354 case $am__api_version in
355 1.14*|1.15*) gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/lib_libbison_a-,g'`;;
356 *) gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/libbison_a-,g'`;;