Hello Alexey, I guess you sent it to the wrong list. You need to send to buildroot team.
Regards, Carmelo On 7/11/2014 6:31 PM, Alexey Brodkin wrote:
Due to https://gcc.gnu.org/bugzilla/show_bug.cgi?id=2222 it's impossible to specify custom CFLAGS_FOR_TARGET, it is always gets overriden with values from "config/mt-ospace": =========== CFLAGS_FOR_TARGET = -g -Os CXXFLAGS_FOR_TARGET = -g -Os =========== But in some situations it's required to pass custom flags on buildong of libgcc: * Default flags "-g -Os" lead to build isses as with PowerPC on gcc 4.5 (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810) * Particular CPU requires specific instructions for HW support * Deep optimizations Tested by toolchain building for ARC, ARM and PowerPC with GCC 4.5 Signed-off-by: Alexey Brodkin <abrod...@synopsys.com> Cc: Anton Kolesov <akole...@synopsys.com> Cc: Thomas Petazzoni <thomas.petazz...@free-electrons.com> Cc: Peter Korsgaard <pe...@korsgaard.com> Cc: Gustavo Zacarias <gust...@zacarias.com.ar> --- package/gcc/gcc-intermediate/gcc-intermediate.mk | 13 +++++++++++++ package/gcc/gcc.mk | 10 ---------- 2 files changed, 13 insertions(+), 10 deletions(-) diff --git a/package/gcc/gcc-intermediate/gcc-intermediate.mk b/package/gcc/gcc-intermediate/gcc-intermediate.mk index db84d18..0543574 100644 --- a/package/gcc/gcc-intermediate/gcc-intermediate.mk +++ b/package/gcc/gcc-intermediate/gcc-intermediate.mk @@ -46,4 +46,17 @@ ifeq ($(BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE),y) HOST_GCC_INTERMEDIATE_INSTALL_OPT += install-target-libgcc endif +ifeq ($(ARCH),powerpc) +ifeq ($(findstring x4.5.,x$(GCC_VERSION)),x4.5.) + # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810 + # Workaround until it's fixed in 4.5.4 or later + HOST_GCC_INTERMEDIATE_CONF_ENV += CFLAGS_FOR_TARGET="-g -O2" + HOST_GCC_INTERMEDIATE_CONF_ENV += CXXFLAGS_FOR_TARGET="-g -O2" +endif +else + # Defaults are "-g -Os" from "config/mt-ospace" + HOST_GCC_INTERMEDIATE_CONF_ENV += CFLAGS_FOR_TARGET="-g -Os" + HOST_GCC_INTERMEDIATE_CONF_ENV += CXXFLAGS_FOR_TARGET="-g -Os" +endif + $(eval $(host-autotools-package)) diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk index 5b60bc3..c6f6e41 100644 --- a/package/gcc/gcc.mk +++ b/package/gcc/gcc.mk @@ -107,16 +107,6 @@ HOST_GCC_COMMON_CONF_OPT = \ HOST_GCC_COMMON_CONF_ENV = \ MAKEINFO=missing -# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810 -# Workaround until it's fixed in 4.5.4 or later -ifeq ($(ARCH),powerpc) -ifeq ($(findstring x4.5.,x$(GCC_VERSION)),x4.5.) -HOST_GCC_COMMON_CONF_OPT += --disable-target-optspace -endif -else -HOST_GCC_COMMON_CONF_OPT += --enable-target-optspace -endif - # gcc 4.6.x quadmath requires wchar ifneq ($(BR2_TOOLCHAIN_BUILDROOT_WCHAR),y) HOST_GCC_COMMON_CONF_OPT += --disable-libquadmath
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