[OE-core] What's up with "fontconfig"

[Mike Looijmans]

When compiling fontconfig, it fails because it is using "build" flags in 
the host compiler. I have BUILD_OPTIMIZATIONS="-march=native ..." set, 
and fontconfig will fail to compile because it passes the -march=native 
flag to the ARM compiler which then fails. Which is justified.

This is the part in the recipe that worries me:

do_configure_append () {
	sed -i 's|LDFLAGS =.*|LDFLAGS =|' fc-case/Makefile
	sed -i 's|LDFLAGS =.*|LDFLAGS =|' fc-glyphname/Makefile
	sed -i 's|LDFLAGS =.*|LDFLAGS =|' fc-lang/Makefile

	sed -i 's|CFLAGS =.*|CFLAGS =${BUILD_CFLAGS}|' fc-case/Makefile
	sed -i 's|CFLAGS =.*|CFLAGS =${BUILD_CFLAGS}|' fc-glyphname/Makefile
	sed -i 's|CFLAGS =.*|CFLAGS =${BUILD_CFLAGS}|' fc-lang/Makefile

	sed -i 's|CPPFLAGS =.*|CPPFLAGS =${BUILD_CPPFLAGS}|' fc-case/Makefile
	sed -i 's|CPPFLAGS =.*|CPPFLAGS =${BUILD_CPPFLAGS}|' fc-glyphname/Makefile
	sed -i 's|CPPFLAGS =.*|CPPFLAGS =${BUILD_CPPFLAGS}|' fc-lang/Makefile

	sed -i 's|CXXFLAGS =.*|CFLAGS =${BUILD_CXXFLAGS}|' fc-case/Makefile
	sed -i 's|CXXFLAGS =.*|CFLAGS =${BUILD_CXXFLAGS}|' fc-glyphname/Makefile
	sed -i 's|CXXFLAGS =.*|CFLAGS =${BUILD_CXXFLAGS}|' fc-lang/Makefile

}

This is not a "native" package. The above commands put the build systems 
include patch and compiler flags into the makefile.

I've worked around the issue by creating a a bbappend that simply 
removes "-march=native" from the build flags, which makes the build of 
this package succeed.

I have no idea what fontconfig is supposed to do and where it is 
supposed to run, but it looks to me as if that configure_append should 
not be there at all.


-- 
Mike Looijmans - TOPIC Automation