From d3073c70c5db2f657da6185f16662d14e3e32270 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@redhat.com>
Date: Wed, 5 Oct 2005 11:19:26 -0700
Subject: re PR target/23602 (1081 test failures in libjava, when configured
 for i486-linux)

        PR target/23602
        * toplev.c (process_options): Warn about unsupported combinations
        of unwind tables and omit-frame-pointer.
        * config/i386/i386.c (override_options): Similarly.  Enable
        accumulate-outgoing-args if not explicitly disabled.
testsuite/
        * g++.dg/eh/omit-frame-pointer.C: Remove i?86 specific options.
        * g++.dg/eh/omit-frame-pointer2.C: Likewise.
libjava/
        * configure.host (i?86-*): Set -fomit-frame-pointer in libgcj_flags,
        but not BACKTRACESPEC.
        (x86_64-*): Similarly.  Don't set -ffloat-store in 64-bit mode.

From-SVN: r105009
---
 libjava/configure.host | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'libjava/configure.host')

diff --git a/libjava/configure.host b/libjava/configure.host
index d84757f..41429d3 100644
--- a/libjava/configure.host
+++ b/libjava/configure.host
@@ -95,18 +95,27 @@ case "${host}" in
 	;;
   i686-*|i586-*|i486-*|i386-*)
 	sysdeps_dir=i386
-	libgcj_flags="${libgcj_flags} -ffloat-store"
+	# With -fomit-frame-pointer -maccumulate-outgoing-args (implied),
+	# the .text section of libgcj.so is 30k larger, and the .eh_frame
+	# section is 1.4M smaller.
+	libgcj_flags="${libgcj_flags} -ffloat-store -fomit-frame-pointer"
 	libgcj_interpreter=yes
 	libgcj_cxxflags=
 	libgcj_cflags=
 	DIVIDESPEC=-fno-use-divide-subroutine
-	BACKTRACESPEC=-fomit-frame-pointer
 	enable_hash_synchronization_default=yes
 	slow_pthread_self=yes
 	;;
   x86_64-*)
 	sysdeps_dir=x86-64
-	libgcj_flags="${libgcj_flags} -ffloat-store"
+	# For 64-bit we always use SSE registers for arithmetic,
+	# which doesn't have the extra precision problems of the fpu.
+	# But be careful about 32-bit multilibs.
+	case " $CC " in
+	*" -m32 "*)
+		libgcj_flags="${libgcj_flags} -ffloat-store" ;;
+	esac
+	libgcj_flags="${libgcj_flags} -fomit-frame-pointer"
 	libgcj_cxxflags=
 	libgcj_cflags=
 	DIVIDESPEC=-f%{m32:no-}use-divide-subroutine
-- 
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