File 0033-build-compile-translate.o-with-fno-.patch of Package qemu

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File 0033-build-compile-translate.o-with-fno-.patch of Package qemu (Revision d9a3c1367781be08902d97cc95e329d6)

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From 132be91691913225f5541b66463db6e084221a1b Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 28 Nov 2012 09:40:23 +0100
Subject: [PATCH] build: compile translate.o with -fno-gcse option on GCC
 4.6.x and 4.7.[012]
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These versions of GCC require insane (>2GB) amounts of memory to compile
translate.o.  As a countermeasure, disable the culprit optimization pass.
This should fix the buildbot failure for default_x86_64_fedora16.  Anyway
this is a good thing to do because people will try to compile 1.3 with
less than 2GB of memory and complain.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 Makefile.target |    3 +++
 configure       |   16 ++++++++++++++++
 2 Dateien geändert, 19 Zeilen hinzugefügt(+)

diff --git a/Makefile.target b/Makefile.target
index 206a232..dc7efe9 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -149,6 +149,9 @@ GENERATED_HEADERS += hmp-commands.h qmp-commands-old.h
 
 endif # CONFIG_SOFTMMU
 
+# Workaround for http://gcc.gnu.org/PR55489, see configure.
+%/translate.o: QEMU_CFLAGS += $(TRANSLATE_OPT_CFLAGS)
+
 nested-vars += obj-y
 ifdef CONFIG_LINUX_USER
 nested-vars += obj-binfmt-y
diff --git a/configure b/configure
index 92c010f..401f369 100755
--- a/configure
+++ b/configure
@@ -1185,6 +1185,21 @@ for flag in $gcc_flags; do
     fi
 done
 
+# Workaround for http://gcc.gnu.org/PR55489.  Happens with -fPIE/-fPIC and
+# large functions that use global variables.  The bug is in all releases of
+# GCC, but it became particularly acute in 4.6.x and 4.7.x.  It is fixed in
+# 4.7.3 and 4.8.0.  We should be able to delete this at the end of 2013.
+cat > $TMPC << EOF
+#if __GNUC__ == 4 && (__GNUC_MINOR__ == 6 || (__GNUC_MINOR__ == 7 && __GNUC_PATCHLEVEL__ <= 2))
+int main(void) { return 0; }
+#else
+#error No bug in this compiler.
+#endif
+EOF
+if compile_prog "-Werror -fno-gcse" "" ; then
+  TRANSLATE_OPT_CFLAGS=-fno-gcse
+fi
+
 if test "$static" = "yes" ; then
   if test "$pie" = "yes" ; then
     echo "static and pie are mutually incompatible"
@@ -3664,6 +3679,7 @@ echo "LIBS_TOOLS+=$libs_tools" >> $config_host_mak
 echo "EXESUF=$EXESUF" >> $config_host_mak
 echo "LIBS_QGA+=$libs_qga" >> $config_host_mak
 echo "POD2MAN=$POD2MAN" >> $config_host_mak
+echo "TRANSLATE_OPT_CFLAGS=$TRANSLATE_OPT_CFLAGS" >> $config_host_mak
 
 # generate list of library paths for linker script

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File 0033-build-compile-translate.o-with-fno-.patch of Package qemu (Revision d9a3c1367781be08902d97cc95e329d6)

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