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      1 # Configure template for GNU Bison.                   -*-Autoconf-*-
      2 #
      3 # Copyright (C) 2001-2012 Free Software Foundation, Inc.
      4 #
      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.
      9 #
     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.
     14 #
     15 # You should have received a copy of the GNU General Public License
     16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     17 
     18 # In order for some versions of Sun Studio to compile our C++ test cases
     19 # correctly, we need Autoconf 2.64 or better to handle the restrict
     20 # keyword in at least string.h from gnulib.  We need Autoconf 2.68 or
     21 # better to avoid a typo in the `configure --help' entry for the YACC
     22 # environment variable.
     23 AC_PREREQ([2.68])
     24 m4_pattern_forbid([^gl_[A-Z]])
     25 
     26 AC_INIT([GNU Bison],
     27         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
     28         [bug-bison (a] gnu.org])
     29 AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
     30 AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
     31                    [The copyright year for this package])
     32 
     33 AC_CONFIG_AUX_DIR([build-aux])
     34 AC_CONFIG_MACRO_DIR([m4])
     35 
     36 # Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
     37 #
     38 #   http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
     39 #
     40 # To avoid 1.11, we make 1.11.1 the minimum version.
     41 #
     42 # We want gnits strictness only when rolling a stable release.  For
     43 # release candidates, we use version strings like 2.4.3_rc1, but gnits
     44 # doesn't like that, so we let the underscore disable gnits.  Between
     45 # releases, we want to be able run make dist without being required to
     46 # add a bogus NEWS entry.  In that case, the version string
     47 # automatically contains a dash, which we also let disable gnits.
     48 AM_INIT_AUTOMAKE([1.11.1 dist-xz silent-rules]
     49                  m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
     50                            [gnu], [gnits]))
     51 AM_SILENT_RULES([yes])
     52 AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
     53 
     54 # Checks for the compiler.
     55 AC_PROG_CC_STDC
     56 AC_PROG_CXX
     57 
     58 # Gnulib (early checks).
     59 gl_EARLY
     60 
     61 # Gnulib uses '#pragma GCC diagnostic push' to silence some
     62 # warnings, but older gcc doesn't support this.
     63 AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
     64   [lv_cv_gcc_pragma_push_works], [
     65   save_CFLAGS=$CFLAGS
     66   CFLAGS='-Wunknown-pragmas -Werror'
     67   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
     68     #pragma GCC diagnostic push
     69     #pragma GCC diagnostic pop
     70   ]])],
     71   [lv_cv_gcc_pragma_push_works=yes],
     72   [lv_cv_gcc_pragma_push_works=no])
     73   CFLAGS=$save_CFLAGS])
     74 
     75 AC_ARG_ENABLE([gcc-warnings],
     76 [  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended)],
     77 [case $enable_gcc_warnings in
     78    yes|no) ;;
     79    *)  AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
     80  esac],
     81               [enable_gcc_warnings=no])
     82 if test "$enable_gcc_warnings" = yes; then
     83   warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
     84     -Wformat -Wpointer-arith -Wwrite-strings'
     85   warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
     86   warn_cxx='-Wnoexcept'
     87   AC_LANG_PUSH([C])
     88   # Clang supports many of GCC's -W options, but only issues warnings
     89   # on the ones it does not recognize.  In that case, gl_WARN_ADD
     90   # thinks the option is supported, and unknown options are then added
     91   # to CFLAGS.  But then, when -Werror is added in the test suite for
     92   # instance, the warning about the unknown option turns into an
     93   # error.
     94   #
     95   # This should be addressed by gnulib's gl_WARN_ADD, but in the
     96   # meanwhile, turn warnings about unknown options into errors in
     97   # CFLAGS, and restore CFLAGS after the tests.
     98   save_CFLAGS=$CFLAGS
     99   gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS])
    100   for i in $warn_common $warn_c;
    101   do
    102     gl_WARN_ADD([$i], [WARN_CFLAGS])
    103   done
    104   gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
    105 
    106   # Warnings for the test suite, and maybe for bison if GCC is modern
    107   # enough.
    108   gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST])
    109   gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST])
    110   test $lv_cv_gcc_pragma_push_works = yes &&
    111     AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])
    112 
    113   # Warnings for the test suite only.
    114   gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
    115   gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST])
    116   CFLAGS=$save_CFLAGS
    117   AC_LANG_POP([C])
    118 
    119 
    120   AC_LANG_PUSH([C++])
    121   save_CXXFLAGS=$CXXFLAGS
    122   gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS])
    123   for i in $warn_common $warn_cxx;
    124   do
    125     gl_WARN_ADD([$i], [WARN_CXXFLAGS])
    126   done
    127   gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
    128               [AC_LANG_PROGRAM([], [nullptr])])
    129   gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
    130   # Warnings for the test suite only.
    131   gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST])
    132   gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST])
    133   CXXFLAGS=$save_CXXFLAGS
    134   AC_LANG_POP([C++])
    135 fi
    136 
    137 BISON_TEST_FOR_WORKING_C_COMPILER
    138 BISON_C_COMPILER_POSIXLY_CORRECT
    139 BISON_TEST_FOR_WORKING_CXX_COMPILER
    140 BISON_CXX_COMPILER_POSIXLY_CORRECT
    141 
    142 AC_ARG_ENABLE([yacc],
    143   [AC_HELP_STRING([--disable-yacc],
    144      [do not build a yacc command or an -ly library])],
    145   , [enable_yacc=yes])
    146 case $enable_yacc in
    147 yes)
    148   YACC_SCRIPT=yacc
    149   YACC_LIBRARY=liby.a;;
    150 *)
    151   YACC_SCRIPT=
    152   YACC_LIBRARY=;;
    153 esac
    154 AC_SUBST([YACC_SCRIPT])
    155 AC_SUBST([YACC_LIBRARY])
    156 
    157 # Checks for programs.
    158 AM_MISSING_PROG([DOT], [dot])
    159 AC_PROG_LEX
    160 $LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
    161 AC_PROG_YACC
    162 AC_PROG_RANLIB
    163 AC_PROG_GNU_M4
    164 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
    165 AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
    166 supports -g, otherwise to "".])
    167 AC_PATH_PROG([PERL], [perl])
    168 if test -z "$PERL"; then
    169    AC_MSG_ERROR([perl not found])
    170 fi
    171 AM_MISSING_PROG([HELP2MAN], [help2man])
    172 AC_PATH_PROG([XSLTPROC], [xsltproc])
    173 AC_SUBST([XSLTPROC])
    174 
    175 # Checks for header files.
    176 AC_CHECK_HEADERS_ONCE([locale.h])
    177 
    178 # Checks for compiler characteristics.
    179 AC_C_INLINE
    180 
    181 # Gnulib (later checks).  Putting them here rather than right after
    182 # gl_EARLY avoids some redundant checks.
    183 gl_INIT
    184 
    185 # Checks for library functions.
    186 AC_CHECK_FUNCS_ONCE([setlocale])
    187 AM_WITH_DMALLOC
    188 BISON_PREREQ_TIMEVAR
    189 
    190 # Gettext.
    191 # We use gnulib, which is only guaranteed to work properly with the
    192 # latest Gettext.
    193 AM_GNU_GETTEXT([external], [need-ngettext])
    194 AM_GNU_GETTEXT_VERSION([0.18])
    195 BISON_I18N
    196 
    197 # Internationalized parsers.
    198 AC_CONFIG_FILES([runtime-po/Makefile.in])
    199 # Autoconf macros for packages using internationalized parsers.
    200 aclocaldir='${datadir}/aclocal'
    201 AC_SUBST([aclocaldir])
    202 
    203 # Create the benchmark script.
    204 AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl])
    205 
    206 # Initialize the test suite.
    207 AC_CONFIG_TESTDIR(tests)
    208 AC_CONFIG_FILES([tests/Makefile tests/atlocal])
    209 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
    210 AC_CHECK_PROGS([VALGRIND], [valgrind])
    211 case $VALGRIND:$host_os in
    212   '':*) ;;
    213   *:darwin*)
    214     # See README-hacking.
    215     # VALGRIND+=' --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind'
    216     VALGRIND=;;
    217   *:*)
    218     AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"]);;
    219 esac
    220 
    221 AM_MISSING_PROG([AUTOM4TE], [autom4te])
    222 # Needed by tests/atlocal.in.
    223 AC_SUBST([GCC])
    224 
    225 gt_JAVACOMP([1.3])
    226 gt_JAVAEXEC
    227 
    228 AC_CONFIG_FILES([Makefile
    229 		 build-aux/Makefile
    230 		 po/Makefile.in
    231 		 data/Makefile
    232 		 etc/Makefile
    233 		 examples/Makefile
    234 		    examples/calc++/Makefile
    235 		 lib/Makefile src/Makefile
    236 		 doc/Makefile
    237 		   doc/yacc.1])
    238 AC_OUTPUT
    239