From 4f617750e838f995b7bb09c52a49c2b7507d7cd2 Mon Sep 17 00:00:00 2001 From: Alejandro Enedino Hernandez Samaniego Date: Wed, 29 May 2019 15:33:05 -0700 Subject: newlib: export CC_FOR_TARGET as CC Newlibs Makefiles use a variable CC_FOR_TARGET to build libraries for the TARGET machine (as opposed to CC_FOR_BUILD). We pass CC on our compile function, which is normally use to build, although in this case, the configure script is trimming CC and using simply gcc for the target machine, basically taking out the TUNE variables we pass in CC as well, such as march, mfloat-abi and such. This causes errors when building applications since CC will try to use hard floating point for example whereas the libc.a from newlib will contain libraries built with the defaults which could be soft floating point for example. e.g.: $ ${CC} a.c real-ld: error: a.out uses VFP register arguments, /usr/lib/libg.a(lib_a-stdio.o) does not. Analizing the object files we can see that one of them uses soft (library) and the other one uses hard floating point (program): $ readelf -A a.out | grep VFP Tag_ABI_VFP_args: VFP registers $ readelf -A usr/lib/libc.a | grep VFP Hence why the linker complains. Pass CC_FOR_TARGET with the contents of CC to override the trimming from the configure script and build newlib with the correct tune. Signed-off-by: Alejandro Enedino Hernandez Samaniego --- .../recipes-standalone/newlib/newlib_3.1.0.bbappend | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/meta-xilinx-standalone/recipes-standalone/newlib/newlib_3.1.0.bbappend b/meta-xilinx-standalone/recipes-standalone/newlib/newlib_3.1.0.bbappend index e5249ab0..2b015c90 100644 --- a/meta-xilinx-standalone/recipes-standalone/newlib/newlib_3.1.0.bbappend +++ b/meta-xilinx-standalone/recipes-standalone/newlib/newlib_3.1.0.bbappend @@ -2,3 +2,7 @@ do_configure_prepend_microblaze() { # hack for microblaze, which needs xilinx.ld to literally do any linking (its hard coded in its LINK_SPEC) export CC="${CC} -L${S}/libgloss/microblaze" } + +do_configure_prepend(){ + export CC_FOR_TARGET="${CC}" +} -- cgit v1.2.3-54-g00ecf