Commit cbdd1999 authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Anthony Liguori
Browse files

build: compile translate.o with -fno-gcse option on GCC 4.6.x and 4.7.[012] 



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: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
parent 02c6ccc6

Makefile.target

+3 −0
Original line number Diff line number Diff line
@@ -143,6 +143,9 @@ 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



# This resolves all nested paths, so it must come last

configure

+16 −0
Original line number Diff line number Diff line
@@ -1183,6 +1183,21 @@ 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"
@@ -3662,6 +3677,7 @@ 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