X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/360ae94ebc3f25f93c44ed6e6f65730afa56ff63..11aef5e95b890364474c49c7d4529de2bec3544e:/configure.ac?ds=inline diff --git a/configure.ac b/configure.ac index c51d2dd5..eb39c617 100644 --- a/configure.ac +++ b/configure.ac @@ -45,18 +45,35 @@ AC_CONFIG_MACRO_DIR([m4]) # releases, we want to be able run make dist without being required to # add a bogus NEWS entry. In that case, the version string # automatically contains a dash, which we also let disable gnits. -AM_INIT_AUTOMAKE([1.11.1 dist-xz nostdinc silent-rules] +AM_INIT_AUTOMAKE([1.11.1 dist-xz nostdinc + color-tests parallel-tests + silent-rules] m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]], [gnu], [gnits])) AM_SILENT_RULES([yes]) -AC_CONFIG_HEADERS([lib/config.h:lib/config.hin]) +AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h]) # Checks for the compiler. AC_PROG_CC_STDC +AC_PROG_CXX # Gnulib (early checks). gl_EARLY +# Gnulib uses '#pragma GCC diagnostic push' to silence some +# warnings, but older gcc doesn't support this. +AC_CACHE_CHECK([whether pragma GCC diagnostic push works], + [lv_cv_gcc_pragma_push_works], [ + save_CFLAGS=$CFLAGS + CFLAGS='-Wunknown-pragmas -Werror' + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + #pragma GCC diagnostic push + #pragma GCC diagnostic pop + ]])], + [lv_cv_gcc_pragma_push_works=yes], + [lv_cv_gcc_pragma_push_works=no]) + CFLAGS=$save_CFLAGS]) + AC_ARG_ENABLE([gcc-warnings], [ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)], [case $enable_gcc_warnings in @@ -65,31 +82,67 @@ AC_ARG_ENABLE([gcc-warnings], esac], [enable_gcc_warnings=no]) if test "$enable_gcc_warnings" = yes; then + warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align + -Wformat -Wpointer-arith -Wwrite-strings' + warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes' + warn_cxx='-Wnoexcept' + + AC_LANG_PUSH([C]) + # Clang supports many of GCC's -W options, but only issues warnings + # on the ones it does not recognize. In that case, gl_WARN_ADD + # thinks the option is supported, and unknown options are then added + # to CFLAGS. But then, when -Werror is added in the test suite for + # instance, the warning about the unknown option turns into an + # error. + # + # This should be addressed by gnulib's gl_WARN_ADD, but in the + # meanwhile, turn warnings about unknown options into errors in + # CFLAGS, and restore CFLAGS after the tests. + save_CFLAGS=$CFLAGS + gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS]) + for i in $warn_common $warn_c; + do + gl_WARN_ADD([$i], [WARN_CFLAGS]) + done gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) - AC_SUBST([WERROR_CFLAGS]) - gl_WARN_ADD([-Wall]) - gl_WARN_ADD([-Wextra -Wno-sign-compare]) - gl_WARN_ADD([-Wcast-align]) - gl_WARN_ADD([-Wcast-qual]) - gl_WARN_ADD([-Wformat]) - gl_WARN_ADD([-Wpointer-arith]) - gl_WARN_ADD([-Wwrite-strings]) - AC_SUBST([WARN_CXXFLAGS], [$WARN_CFLAGS]) - # The following warnings are not suitable for C++. - gl_WARN_ADD([-Wbad-function-cast]) - gl_WARN_ADD([-Wmissing-declarations]) - gl_WARN_ADD([-Wmissing-prototypes]) - gl_WARN_ADD([-Wshadow]) - gl_WARN_ADD([-Wstrict-prototypes]) - AC_SUBST([WARN_CFLAGS]) + + # Warnings for the test suite, and maybe for bison if GCC is modern + # enough. + gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST]) + gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST]) + test $lv_cv_gcc_pragma_push_works = yes && + AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"]) + # Warnings for the test suite only. gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST]) gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST]) - AC_SUBST([WARN_CXXFLAGS_TEST], ["$WARN_CXXFLAGS $WARN_CFLAGS_TEST"]) - AC_SUBST([WARN_CFLAGS_TEST], ["$WARN_CFLAGS $WARN_CFLAGS_TEST"]) + CFLAGS=$save_CFLAGS + AC_LANG_POP([C]) + + + AC_LANG_PUSH([C++]) + save_CXXFLAGS=$CXXFLAGS + gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS]) + for i in $warn_common $warn_cxx; + do + gl_WARN_ADD([$i], [WARN_CXXFLAGS]) + done + gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS], + [AC_LANG_PROGRAM([], [nullptr])]) + gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS]) + # Warnings for the test suite only. + gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST]) + gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST]) + # Variants break strict aliasing analysis. + gl_WARN_ADD([-fno-strict-aliasing], [NO_STRICT_ALIAS_CXXFLAGS]) + CXXFLAGS=$save_CXXFLAGS + AC_LANG_POP([C++]) fi BISON_TEST_FOR_WORKING_C_COMPILER +BISON_C_COMPILER_POSIXLY_CORRECT +BISON_TEST_FOR_WORKING_CXX_COMPILER +BISON_CXX_COMPILER_POSIXLY_CORRECT AC_ARG_ENABLE([yacc], [AC_HELP_STRING([--disable-yacc], @@ -107,13 +160,19 @@ AC_SUBST([YACC_SCRIPT]) AC_SUBST([YACC_LIBRARY]) # Checks for programs. +AM_MISSING_PROG([DOT], [dot]) AC_PROG_LEX +$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required]) AC_PROG_YACC AC_PROG_RANLIB AC_PROG_GNU_M4 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.]) AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4 supports -g, otherwise to "".]) +AC_PATH_PROG([PERL], [perl]) +if test -z "$PERL"; then + AC_MSG_ERROR([perl not found]) +fi AM_MISSING_PROG([HELP2MAN], [help2man]) AC_PATH_PROG([XSLTPROC], [xsltproc]) AC_SUBST([XSLTPROC]) @@ -131,7 +190,6 @@ gl_INIT # Checks for library functions. AC_CHECK_FUNCS_ONCE([setlocale]) AM_WITH_DMALLOC -BISON_PREREQ_SUBPIPE BISON_PREREQ_TIMEVAR # Gettext. @@ -155,30 +213,23 @@ AC_CONFIG_TESTDIR(tests) AC_CONFIG_FILES([tests/atlocal]) AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison]) AC_CHECK_PROGS([VALGRIND], [valgrind]) -AC_PROG_CXX -BISON_TEST_FOR_WORKING_CXX_COMPILER +case $VALGRIND:$host_os in + '':*) ;; + *:darwin*) + # See README-hacking. + # VALGRIND+=' --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind' + VALGRIND=;; + *:*) + AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"]);; +esac + AM_MISSING_PROG([AUTOM4TE], [autom4te]) # Needed by tests/atlocal.in. AC_SUBST([GCC]) -AC_SUBST([O0CFLAGS], [`echo $CFLAGS | sed 's/-O[[0-9]] *//'`]) -AC_SUBST([O0CXXFLAGS], [`echo $CXXFLAGS | sed 's/-O[[0-9]] *//'`]) gt_JAVACOMP([1.3], [1.4]) gt_JAVAEXEC -# We use gnulib, but from lib/local.mk instead of lib/Makefile.am. -# So prefix paths with lib/. See also etc/prefix-gnulib-mk. -gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , lib/,g'` -# Listing the names of the variables to prefix is error-prone. -# Rather, adjust all the AC_SUBST variables whose name ends in '_H', -# and whose content ends in '.h'. -for ac_var in $ac_subst_vars -do - eval "ac_val=\$$ac_var" - case $ac_var=$ac_val in - (*_H=*.h) eval "$ac_var=lib/\$$ac_var";; - esac -done AC_CONFIG_FILES([Makefile po/Makefile.in doc/yacc.1])