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| author | Alexey Brodkin <Alexey.Brodkin@synopsys.com> | 2015-03-24 16:55:15 +0300 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2015-07-22 23:20:50 +0200 |
| commit | 0fe633cdff66febadc50bab3e0af4b3be53811c8 (patch) | |
| tree | d1684f5a3e78202f1889a2fa14b544abacc6d2a4 /package/gcc | |
| parent | 64c10ae691e230935473f23ef71ab997293adf8f (diff) | |
| download | buildroot-0fe633cdff66febadc50bab3e0af4b3be53811c8.tar.gz buildroot-0fe633cdff66febadc50bab3e0af4b3be53811c8.zip | |
gcc: explicitly use C{XX}FLAGS_FOR_TARGET instead of --enable-target-optspace
The gcc.mk file is passing --enable-target-optspace to gcc configure
script, to ask for space-optimized (-Os) target libraries. However,
passing this option has the effect of overriding any custom
CFLAGS_FOR_TARGET or CXXFLAGS_FOR_TARGET values that may be passed.
These are some situations when it is 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
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Anton Kolesov <akolesov@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'package/gcc')
| -rw-r--r-- | package/gcc/gcc.mk | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/package/gcc/gcc.mk b/package/gcc/gcc.mk index d1693d5a07..aaeba7f5d5 100644 --- a/package/gcc/gcc.mk +++ b/package/gcc/gcc.mk @@ -100,16 +100,22 @@ HOST_GCC_COMMON_CONF_OPTS = \ HOST_GCC_COMMON_CONF_ENV = \ MAKEINFO=missing +GCC_COMMON_TARGET_CFLAGS = $(TARGET_CFLAGS) +GCC_COMMON_TARGET_CXXFLAGS = $(TARGET_CXXFLAGS) + # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43810 # Workaround until it's fixed in 4.5.4 or later ifeq ($(ARCH),powerpc) ifeq ($(findstring x4.5.,x$(GCC_VERSION)),x4.5.) -HOST_GCC_COMMON_CONF_OPTS += --disable-target-optspace +GCC_COMMON_TARGET_CFLAGS = $(filter-out -Os,$(GCC_COMMON_TARGET_CFLAGS)) +GCC_COMMON_TARGET_CXXFLAGS = $(filter-out -Os,$(GCC_COMMON_TARGET_CXXFLAGS)) endif -else -HOST_GCC_COMMON_CONF_OPTS += --enable-target-optspace endif +# Propagate options used for target software building to GCC target libs +HOST_GCC_COMMON_CONF_ENV += CFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CXXFLAGS)" +HOST_GCC_COMMON_CONF_ENV += CXXFLAGS_FOR_TARGET="$(GCC_COMMON_TARGET_CXXFLAGS)" + # libitm needs sparc V9+ ifeq ($(BR2_sparc_v8)$(BR2_sparc_leon3),y) HOST_GCC_COMMON_CONF_OPTS += --disable-libitm |
