Patrick Georgi (pgeorgi@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10412
-gerrit
commit 4b70d048b70c4d54942014e83e356f9bca60ba6c Author: Patrick Georgi patrick@georgi-clan.de Date: Thu Jun 4 00:09:12 2015 +0200
crossgcc: Improve compatibility of the toolchain across host systems
crossgcc builds gmp, whose build system normally optimises for the hardware it's built on. That may give a minor performance boost but has the downside that the compiler becomes non-portable and may break on other systems due to illegal instructions.
Setting CFLAGS to some reasonable value prevents gmp's configure script from choosing CPU specific -mtune flags (which may enable optimizations that only run on CPUs with the same feature set). Enabling "fat" builds make the build system add all optimized assembler routines and makes the selection of the right one a runtime decision instead of deciding at compile time.
Change-Id: I72d20627270baa082cd02ebb4c9a09cd23f30f8c Signed-off-by: Patrick Georgi patrick@georgi-clan.de --- util/crossgcc/buildgcc | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/util/crossgcc/buildgcc b/util/crossgcc/buildgcc index 15bcd92..a1b596e 100755 --- a/util/crossgcc/buildgcc +++ b/util/crossgcc/buildgcc @@ -22,8 +22,8 @@
cd `dirname $0`
-CROSSGCC_DATE="March 8th, 2015" -CROSSGCC_VERSION="1.27" +CROSSGCC_DATE="June 3th, 2015" +CROSSGCC_VERSION="1.28"
# default settings TARGETDIR=`pwd`/xgcc @@ -418,7 +418,7 @@ printf "Building GMP ${GMP_VERSION} ... " ( cd ${BUILDDIRPREFIX}-gmp rm -f .failed - CC="$CC" ../${GMP_DIR}/configure --disable-shared --prefix=$TARGETDIR $OPTIONS \ + CC="$CC" CFLAGS="-Os" ../${GMP_DIR}/configure --disable-shared --enable-fat --prefix=$TARGETDIR $OPTIONS \ || touch .failed $MAKE $JOBS || touch .failed $MAKE install DESTDIR=$DESTDIR || touch .failed