configure.in: Check for -Wno-long-long option support and improve handling of warning CFLAGS...

        * configure.in: Check for -Wno-long-long option support and improve
        handling of warning CFLAGS for stages 1 and 2.
        * Makefile.in (WARN_CFLAGS): Move definition to configure.in.
        * configure: Regenerate.

From-SVN: r34156

gcc/ChangeLog

+2000-05-24  J. David Anglin  <dave@hiauly.hia.nrc.ca>
+
+	* configure.in: Check for -Wno-long-long option support and improve
+	handling of warning CFLAGS for stages 1 and 2.
+	* Makefile.in (WARN_CFLAGS): Move definition to configure.in.
+	* configure: Regenerate.
+
 Wed May 24 19:37:53 2000  Jeffrey A Law  (law@cygnus.com)
 
 	* gcc.texi: Remove contributor list.  Instead include contrib.texi.

gcc/Makefile.in

@@ -76,7 +76,7 @@ XCFLAGS =
 TCFLAGS =
 CFLAGS = -g @stage1_warn_cflags@
 BOOT_CFLAGS = -O2 $(CFLAGS)
-WARN_CFLAGS = -W -Wall -Wtraditional -pedantic -Wno-long-long -Wwrite-strings
+WARN_CFLAGS = @stage2_warn_cflags@
 LOOSE_CFLAGS = `echo $(CFLAGS)|sed -e 's/-pedantic//g' -e 's/-Wtraditional//g'`
 # These exists to be overridden by the x-* and t-* files, respectively.
 X_CFLAGS =

gcc/configure.in

@@ -329,15 +329,30 @@ AC_SUBST(NO_MINUS_C_MINUS_O)
 
 gcc_AC_C_LONG_DOUBLE
 
+AC_MSG_CHECKING(whether ${CC-cc} accepts -Wno-long-long)
+echo 'void f(){}' > conftest.c
+if test -z "`${CC-cc} -Wno-long-long -c conftest.c 2>&1`"; then
+  ac_cv_prog_cc_no_long_long=yes
+else
+  ac_cv_prog_cc_no_long_long=no
+fi
+rm -f conftest*
+echo "$ac_t"$ac_cv_prog_cc_no_long_long 1>&6
+
 # If the native compiler is GCC, we can enable warnings even in stage1.  
 # That's useful for people building cross-compilers, or just running a
 # quick `make'.
+stage1_warn_cflags=" -W -Wall -Wtraditional -Wwrite-strings"
+stage2_warn_cflags="$stage1_warn_cflags -pedantic -Wno-long-long"
 if test "x$GCC" = "xyes"; then 
-  stage1_warn_cflags='$(WARN_CFLAGS)'
+  if test $ac_cv_prog_cc_no_long_long = yes; then
+    stage1_warn_cflags="$stage1_warn_cflags -pedantic -Wno-long-long"
+  fi
 else
   stage1_warn_cflags=""
 fi
 AC_SUBST(stage1_warn_cflags)
+AC_SUBST(stage2_warn_cflags)
 
 AC_PROG_MAKE_SET