+AM_PROG_CC_STDC
+AC_PROG_RANLIB
+AM_MISSING_PROG([AUTOM4TE], [autom4te])
+BISON_PROG_GNU_M4
+if test x"$ac_cv_prog_gnu_m4" != xyes; then
+ AC_MSG_ERROR([GNU M4 1.4 is required])
+fi
+AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
+
+AC_ARG_ENABLE(gcc-warnings,
+[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)],
+[case "${enableval}" in
+ yes|no) ;;
+ *) AC_MSG_ERROR([bad value ${enableval} for gcc-warnings option]) ;;
+ esac],
+ [enableval=no])
+if test "${enableval}" = yes; then
+ BISON_WARNING(-Werror)
+ AC_SUBST([WERROR_CFLAGS], [$WARNING_CFLAGS])
+ 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)
+fi
+
+# Checks for libraries.
+AC_DEFINE([_GNU_SOURCE],1,[Define to 1 for GNU C library extensions.])
+
+# Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS([ctype.h locale.h memory.h stdlib.h string.h unistd.h])
+
+# Checks for compiler characteristics.
+AC_C_CONST
+AC_C_INLINE
+AM_C_PROTOTYPES
+
+# Checks for library functions.
+AC_FUNC_ALLOCA
+AC_FUNC_OBSTACK
+AC_FUNC_ERROR_AT_LINE
+AC_FUNC_STRNLEN
+UTILS_FUNC_MKSTEMP
+AC_CHECK_FUNCS(setlocale)
+AC_CHECK_DECLS([getenv, getopt, free, stpcpy, strchr, strspn, strnlen,
+ malloc, memchr, memrchr])
+AC_REPLACE_FUNCS(stpcpy strchr strspn memchr memrchr)
+jm_FUNC_MALLOC
+jm_FUNC_REALLOC
+jm_PREREQ_QUOTEARG
+jm_PREREQ_ERROR
+AM_WITH_DMALLOC
+BISON_PREREQ_TIMEVAR
+
+# Gettext.
+AM_GNU_GETTEXT(external, need-ngettext)
+AM_GNU_GETTEXT_VERSION(0.11.5)
+
+# This is necessary so that .o files in LIBOBJS are also built via
+# the ANSI2KNR-filtering rules.
+LIB@&t@OBJS=`echo $LIB@&t@OBJS|sed 's/\.o /\$U.o /g;s/\.o$/\$U.o/'`
+AC_SUBST(LIB@&t@OBJS)
+
+AC_OUTPUT([Makefile
+ config/Makefile
+ po/Makefile.in
+ data/Makefile
+ lib/Makefile src/Makefile doc/Makefile
+ m4/Makefile])