On 16.09.2016 15:55, Stephan Bergmann wrote:
> Various of the solenv/gbuild/LINUX_*_GCC.mk (namely ARM, AXP, M86K,
> POWERPC64, S390, S390X) have lines
> gb_CFLAGS += ...
> gb_CXXFLAGS += ...
> to add additional flags before including linux.mk. However, these
> additions appear to not be effective, as unxgcc.mk (included from
> linux.mk) unconditionally resets those variables via
> gb_CFLAGS := ...
> gb_CXXFLAGS := ...
> (Also, moving the additions in the LINUX_*_GCC.mk files after including
> linux.mk wouldn't appear to help, either, as the ultimate use of these
> two variables is in
> gb_LinkTarget_CFLAGS := $(gb_CFLAGS)
> gb_LinkTarget_CXXFLAGS := $(gb_CXXFLAGS)
> in unxgcc.mk, so the latter variables would still not get the additions.
> The only correct way appears to be to have
> gb_LinkTarget_CFLAGS += ...
> gb_LinkTarget_CXXFLAGS += ...
> in the LINUX_*_GCC.mk files after including linux.mk. Similar problems
> may be present in other $(OS)_$(CPUNAME)_$(COM) files, too)
> Or what am I missing?
yes that appears quite pointless.
it would be better to assign these values to gb_COMPILEROPTFLAGS which
is checked in com_GCC_defs.mk.
most of the unused ones are set to -fno-omit-frame-pointer anyway which
i guess isn't that important; there is just one where i have no idea
what it does:
solenv/gbuild/platform/LINUX_POWERPC64_GCC.mk:gb_CXXFLAGS += -mminimal-toc
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