Avoid warnings generated by GCC 2.95.4 when Bison is

[bison.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index b63a9a204d3ce255daa59f597af2d3cacf1db2e6..8c7f35f1139d3a464643b383a84f34afbf39e0d1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -18,9 +18,9 @@
 # 02111-1307  USA
 
 # We need a recent Autoconf to run a recent Autotest.
-AC_PREREQ(2.54)
+AC_PREREQ(2.57)
 
-AC_INIT([GNU Bison], [1.875], [bug-bison@gnu.org])
+AC_INIT([GNU Bison], [1.875b], [bug-bison@gnu.org])
 AC_CONFIG_AUX_DIR(config)
 
 AM_INIT_AUTOMAKE([1.7 check-news readme-alpha dist-bzip2])
@@ -46,19 +46,36 @@ if test "${enableval}" = yes; then
   WARNING_CFLAGS=
   BISON_WARNING(-Wall)
   BISON_WARNING(-W)
-  BISON_WARNING(-Wbad-function-cast)
   BISON_WARNING(-Wcast-align)
   BISON_WARNING(-Wcast-qual)
   BISON_WARNING(-Wformat)
-  BISON_WARNING(-Wmissing-declarations)
   BISON_WARNING(-Wmissing-prototypes)
-  BISON_WARNING(-Wnested-externs)
   BISON_WARNING(-Wshadow)
   BISON_WARNING(-Wstrict-prototypes)
   BISON_WARNING(-Wwrite-strings)
+  AC_SUBST([WARNING_CXXFLAGS], [$WARNING_CFLAGS])
+  # The following warnings are not suitable for C++.
+  BISON_WARNING(-Wbad-function-cast)
+  BISON_WARNING(-Wmissing-declarations)
+  BISON_WARNING(-Wnested-externs)
   AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
 fi
 
+AC_ARG_ENABLE([yacc],
+  [AC_HELP_STRING([--disable-yacc],
+     [do not build a yacc command or an -ly library])],
+  , [enable_yacc=yes])
+case $enable_yacc in
+yes)
+  YACC_SCRIPT=yacc
+  YACC_LIBRARY=liby.a;;
+*)
+  YACC_SCRIPT=
+  YACC_LIBRARY=;;
+esac
+AC_SUBST([YACC_SCRIPT])
+AC_SUBST([YACC_LIBRARY])
+
 # Checks for programs.
 AC_PROG_LEX
 AC_PROG_YACC
@@ -81,25 +98,32 @@ AC_C_INLINE
 AC_CHECK_TYPES([uintptr_t])
 
 # Checks for library functions.
-AC_FUNC_ALLOCA
-AC_FUNC_OBSTACK
-AC_FUNC_ERROR_AT_LINE
-AC_FUNC_STRNLEN
 AC_CHECK_FUNCS(setlocale)
 AC_CHECK_DECLS([free, getenv, getopt,
                 stpcpy, strchr, strspn, strnlen,
                 malloc, memchr, memrchr])
-AC_REPLACE_FUNCS(memchr memrchr \
-                 strchr stpcpy strrchr strspn strtol strtoul)
-AC_FUNC_MALLOC
-AC_FUNC_REALLOC
-jm_PREREQ_MBSWIDTH
-jm_PREREQ_QUOTEARG
-jm_FUNC_ARGMATCH
-jm_PREREQ_ERROR
+AC_REPLACE_FUNCS(strchr strrchr strspn)
 AM_WITH_DMALLOC
 BISON_PREREQ_SUBPIPE
 BISON_PREREQ_TIMEVAR
+gl_DIRNAME
+gl_ERROR
+gl_FUNC_ALLOCA
+gl_FUNC_MEMCHR
+gl_FUNC_MEMRCHR
+gl_FUNC_STPCPY
+gl_FUNC_STRNLEN
+gl_FUNC_STRTOL
+gl_GETOPT
+gl_HASH
+gl_MBSWIDTH
+gl_OBSTACK
+gl_QUOTE
+gl_QUOTEARG
+gl_XALLOC
+jm_FUNC_GLIBC_UNLOCKED_IO
+jm_FUNC_MALLOC
+jm_FUNC_REALLOC
 
 # Gettext.
 AM_GNU_GETTEXT(external, need-ngettext)
@@ -110,7 +134,7 @@ AC_CONFIG_TESTDIR(tests)
 AC_CONFIG_FILES([tests/Makefile tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
 AC_CHECK_PROGS([VALGRIND], [valgrind])
-AC_CHECK_PROGS([GXX], [g++])
+AC_PROG_CXX
 AM_MISSING_PROG([AUTOM4TE], [autom4te])
 # Needed by tests/atlocal.in.
 AC_SUBST([GCC])