+AM_PROG_CC_STDC
+AC_PROG_INSTALL
+AC_PROG_RANLIB
+
+dnl Checks for libraries.
+
+dnl Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS(ctype.h locale.h memory.h stdlib.h string.h unistd.h)
+
+dnl Checks for typedefs.
+
+dnl Checks for structures.
+
+dnl Checks for compiler characteristics.
+AC_C_CONST
+AM_C_PROTOTYPES
+
+dnl Checks for library functions.
+AC_FUNC_ALLOCA
+AC_CHECK_FUNCS(mkstemp setlocale)
+BISON_NEED_DECLARATIONS(calloc realloc)
+
+AM_GNU_GETTEXT
+
+# This is necessary so that .o files in LIBOBJS are also built via
+# the ANSI2KNR-filtering rules.
+LIBOBJS=`echo $LIBOBJS|sed 's/\.o /\$U.o /g;s/\.o$/\$U.o/'`
+
+AC_DEFINE_UNQUOTED(VERSION_STRING, "GNU Bison version ${VERSION}")
+XPFILE="${datadir}/bison.simple"
+BISON_DEFINE_FILE(XPFILE, XPFILE)
+XPFILE1="${datadir}/bison.hairy"
+BISON_DEFINE_FILE(XPFILE1, XPFILE1)
+LOCALEDIR="${datadir}/locale"
+BISON_DEFINE_FILE(LOCALEDIR, LOCALEDIR)
+
+AC_OUTPUT(Makefile intl/Makefile po/Makefile.in src/Makefile doc/Makefile)