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3551d51dd9
Reported by Derek Clegg. http://lists.gnu.org/archive/html/bug-bison/2019-01/msg00005.html * configure.ac (warn_cxx): Add -Wextra-semi. * data/skeletons/c++.m4: Remove extraneous semi-colon.
296 lines
9.7 KiB
Plaintext
296 lines
9.7 KiB
Plaintext
# Configure template for GNU Bison. -*-Autoconf-*-
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#
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# Copyright (C) 2001-2015, 2018-2019 Free Software Foundation, Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# In order for some versions of Sun Studio to compile our C++ test cases
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# correctly, we need Autoconf 2.64 or better to handle the restrict
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# keyword in at least string.h from gnulib. We need Autoconf 2.68 or
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# better to avoid a typo in the 'configure --help' entry for the YACC
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# environment variable.
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AC_PREREQ([2.68])
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m4_pattern_forbid([^_?(gl_[A-Z]|AX_|BISON_)])
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m4_pattern_allow([^BISON_USE_NLS$])
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AC_INIT([GNU Bison],
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m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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[bug-bison@gnu.org])
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AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2019])
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AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
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[The copyright year for this package])
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AC_CONFIG_AUX_DIR([build-aux])
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AC_CONFIG_MACRO_DIR([m4])
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# We use Automake 1.14's %D% and %C%.
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#
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# We want gnits strictness only when rolling a stable release. For
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# release candidates, we use version strings like 2.4.3_rc1, but gnits
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# doesn't like that, so we let the underscore disable gnits. Between
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# releases, we want to be able run make dist without being required to
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# add a bogus NEWS entry. In that case, the version string
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# automatically contains a dash, which we also let disable gnits.
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AM_INIT_AUTOMAKE([1.14 dist-xz nostdinc
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color-tests parallel-tests
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silent-rules]
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m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
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[gnu], [gnits]))
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AM_SILENT_RULES([yes])
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AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
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# Checks for the compiler.
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AC_PROG_CC_STDC
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AC_PROG_CXX
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# Gnulib (early checks).
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gl_EARLY
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# Gnulib uses '#pragma GCC diagnostic push' to silence some
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# warnings, but older gcc doesn't support this.
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AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
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[lv_cv_gcc_pragma_push_works], [
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save_CFLAGS=$CFLAGS
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CFLAGS='-Wunknown-pragmas -Werror'
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#pragma GCC diagnostic push
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#pragma GCC diagnostic pop
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]])],
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[lv_cv_gcc_pragma_push_works=yes],
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[lv_cv_gcc_pragma_push_works=no])
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CFLAGS=$save_CFLAGS])
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AC_LANG_PUSH([C++])
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gl_WARN_ADD([-fno-exceptions], [NO_EXCEPTIONS_CXXFLAGS])
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BISON_CXXSTD([98])
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BISON_CXXSTD([03])
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BISON_CXXSTD([11])
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BISON_CXXSTD([14])
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BISON_CXXSTD([17])
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BISON_CXXSTD([2a])
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AM_CONDITIONAL([ENABLE_CXX11], [test x"$CXX11_CXXFLAGS" != x])
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AM_CONDITIONAL([ENABLE_CXX14], [test x"$CXX14_CXXFLAGS" != x])
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AC_LANG_POP([C++])
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AC_ARG_ENABLE([gcc-warnings],
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[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended).
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Also, issue synclines from the examples/ to
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the corresponding source in the Texinfo doc.],
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[case $enable_gcc_warnings in
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yes|no) ;;
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*) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
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esac],
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[enable_gcc_warnings=no])
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AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
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if test "$enable_gcc_warnings" = yes; then
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warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
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-fparse-all-comments -Wdocumentation
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-Wformat -Wnull-dereference -Wpointer-arith -Wshadow -Wwrite-strings'
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warn_c='-Wbad-function-cast -Wstrict-prototypes'
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warn_cxx='-Wextra-semi -Wnoexcept'
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# Warnings for the test suite only.
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#
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# -fno-color-diagnostics: Clang's use of colors in the error
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# messages is confusing the tests looking at the compiler's output
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# (e.g., synclines.at).
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#
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# -Wno-keyword-macro: We use the "#define private public" dirty
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# trick in the test suite to check some private implementation
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# details for lalr1.cc.
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warn_tests='-Wundef -pedantic -Wconversion
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-Wdeprecated -Wsign-compare -Wsign-conversion
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-fno-color-diagnostics
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-Wno-keyword-macro'
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AC_LANG_PUSH([C])
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# Clang supports many of GCC's -W options, but only issues warnings
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# on the ones it does not recognize. In that case, gl_WARN_ADD
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# thinks the option is supported, and unknown options are then added
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# to CFLAGS. But then, when -Werror is added in the test suite for
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# instance, the warning about the unknown option turns into an
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# error.
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#
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# This should be addressed by gnulib's gl_WARN_ADD, but in the
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# meanwhile, turn warnings about unknown options into errors in
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# CFLAGS, and restore CFLAGS after the tests.
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save_CFLAGS=$CFLAGS
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gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS])
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# Accept this warning only if it is not too touchy (e.g., clang 3.3
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# and 3.4).
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gl_WARN_ADD([-Wunreachable-code], [WARN_CFLAGS],
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[AC_LANG_PROGRAM([],
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[[if (sizeof (long) < sizeof (int)) return 1;]])])
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for i in $warn_common $warn_c;
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do
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gl_WARN_ADD([$i], [WARN_CFLAGS])
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done
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gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
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# Warnings for the test suite, and maybe for bison if GCC is modern
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# enough.
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gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST])
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gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST])
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test $lv_cv_gcc_pragma_push_works = yes &&
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AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])
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# Warnings for the test suite only.
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for i in $warn_tests -Wincompatible-pointer-types;
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do
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gl_WARN_ADD([$i], [WARN_CFLAGS_TEST])
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done
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CFLAGS=$save_CFLAGS
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AC_LANG_POP([C])
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AC_LANG_PUSH([C++])
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save_CXXFLAGS=$CXXFLAGS
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gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS])
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for i in $warn_common $warn_cxx;
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do
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gl_WARN_ADD([$i], [WARN_CXXFLAGS])
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done
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# Accept this warning only if it is not too touchy (e.g., clang 3.3
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# and 3.4).
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gl_WARN_ADD([-Wunreachable-code], [WARN_CXXFLAGS],
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[AC_LANG_PROGRAM([],
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[[if (sizeof (long) < sizeof (int)) return 1;]])])
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gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
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[AC_LANG_PROGRAM([], [nullptr])])
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gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
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# Warnings for the test suite only.
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for i in $warn_tests;
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do
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gl_WARN_ADD([$i], [WARN_CXXFLAGS_TEST])
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done
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# Too many compilers complain about Flex generated code.
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gl_WARN_ADD([-Wno-error], [FLEX_SCANNER_CXXFLAGS])
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# Clang++ deprecates compiling C.
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gl_WARN_ADD([-Wno-deprecated], [WNO_DEPRECATED_CXXFLAGS])
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CXXFLAGS=$save_CXXFLAGS
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AC_LANG_POP([C++])
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fi
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BISON_TEST_FOR_WORKING_C_COMPILER
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BISON_C_COMPILER_POSIXLY_CORRECT
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BISON_TEST_FOR_WORKING_CXX_COMPILER
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BISON_CXX_COMPILER_POSIXLY_CORRECT
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# D.
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AC_CHECK_PROGS([DC], [dmd])
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AM_CONDITIONAL([ENABLE_D], [test x"$DC" != x])
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# Java.
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gt_JAVACOMP([1.7], [1.7])
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gt_JAVAEXEC
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AM_CONDITIONAL([ENABLE_JAVA], [test x"$CONF_JAVAC" != x && test x"$CONF_JAVA" != x])
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AC_ARG_ENABLE([yacc],
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[AC_HELP_STRING([--disable-yacc],
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[do not build a yacc command or an -ly library])],
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, [enable_yacc=yes])
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AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes])
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AC_CONFIG_FILES([src/yacc], [chmod +x src/yacc])
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# Checks for programs.
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AM_MISSING_PROG([DOT], [dot])
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AC_PROG_LEX
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$LEX_IS_FLEX || test "X$LEX" = X: || {
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AC_MSG_WARN([bypassing lex because flex is required])
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LEX=:
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}
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AM_CONDITIONAL([FLEX_CXX_WORKS],
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[$LEX_IS_FLEX && test $bison_cv_cxx_works = yes])
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AC_PROG_YACC
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AC_PROG_RANLIB
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AC_PROG_GNU_M4
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AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
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AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
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supports -g, otherwise to "".])
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AC_PATH_PROG([PERL], [perl])
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if test -z "$PERL"; then
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AC_MSG_ERROR([perl not found])
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fi
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AM_MISSING_PROG([HELP2MAN], [help2man])
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AC_PATH_PROG([XSLTPROC], [xsltproc])
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AC_SUBST([XSLTPROC])
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# Checks for header files.
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AC_CHECK_HEADERS_ONCE([locale.h])
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# Checks for compiler characteristics.
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AC_C_INLINE
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# Gnulib (later checks). Putting them here rather than right after
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# gl_EARLY avoids some redundant checks.
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gl_INIT
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# Checks for library functions.
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AC_CHECK_FUNCS_ONCE([setlocale])
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AM_WITH_DMALLOC
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# Gettext.
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# We use gnulib, which is only guaranteed to work properly with the
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# latest Gettext.
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AM_GNU_GETTEXT([external], [need-ngettext])
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AM_GNU_GETTEXT_VERSION([0.18])
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BISON_I18N
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# Internationalized parsers.
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AC_CONFIG_FILES([runtime-po/Makefile.in])
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# Autoconf macros for packages using internationalized parsers.
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aclocaldir='${datadir}/aclocal'
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AC_SUBST([aclocaldir])
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# Create the benchmark script.
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AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
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# Initialize the test suite.
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AC_CONFIG_TESTDIR(tests)
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AC_CONFIG_FILES([tests/atlocal])
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AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
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AC_CHECK_PROGS([VALGRIND], [valgrind])
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# Use something simpler that $host_os to select our suppression file.
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uname=`uname`
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case $VALGRIND:$uname in
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'':*) ;;
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*:Darwin)
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# See README-hacking.
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VALGRIND=;;
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*:*)
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suppfile=build-aux/$uname.valgrind
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if test -f "$srcdir/$suppfile"; then
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AC_SUBST([VALGRIND_OPTS_SUPPRESSION],
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["--suppressions=\$(abs_top_srcdir)/$suppfile"])
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fi
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;;
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esac
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AC_MSG_CHECKING([Valgrind suppression file])
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AC_MSG_RESULT([$suppfile])
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# Whether we cannot run the compiled bison.
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AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
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AM_MISSING_PROG([AUTOM4TE], [autom4te])
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# Needed by tests/atlocal.in.
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AC_SUBST([GCC])
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AC_CONFIG_FILES([Makefile
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po/Makefile.in
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doc/yacc.1])
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AC_OUTPUT
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