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| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2017-02-26 23:38:26 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2017-02-27 21:38:49 +0100 |
| commit | 68cebedeb977396f64f5f591f5e93f34fab8e0a8 (patch) | |
| tree | 1d01cce6ba576b380c3f6c985879e24ef6597009 | |
| parent | 0fae8618a3c9f180da432ce904d1a37d15ea50bd (diff) | |
| download | buildroot-68cebedeb977396f64f5f591f5e93f34fab8e0a8.tar.gz buildroot-68cebedeb977396f64f5f591f5e93f34fab8e0a8.zip | |
assimp: work around gcc bug on SuperH
gcc versions earlier than gcc 6.x fail to build assimp on SuperH when
static linking:
AssxmlExporter.cpp:623:1: error: unable to find a register to spill in class 'GENERAL_REGS'
It's the combination of -Os and *not* having -fPIC that makes gcc
fail, which explains why configurations with dynamic linking work
fine.
-Os -fPIC -> works
-Os -> fails
-O2 -fPIC -> works
-O2 -> works
Therefore, as a workaround, we are forcing the use of -O2 on SuperH
when the gcc version is older than gcc 6.x and we're statically
linking.
Fixes:
http://autobuild.buildroot.net/results/ec88aa8118179e30e24603cc45292047dca19216/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
| -rw-r--r-- | package/assimp/assimp.mk | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/package/assimp/assimp.mk b/package/assimp/assimp.mk index 08893fff00..298e121cb8 100644 --- a/package/assimp/assimp.mk +++ b/package/assimp/assimp.mk @@ -16,6 +16,14 @@ ifeq ($(BR2_m68k),y) ASSIMP_CXXFLAGS += -mxgot endif +# workaround SuperH compiler failure when static linking (i.e -fPIC is +# not passed) in gcc versions 5.x or older. The -Os optimization level +# causes a "unable to find a register to spill in class +# ‘GENERAL_REGS’" error. -O2 works fine. +ifeq ($(BR2_sh):$(BR2_STATIC_LIBS):$(BR2_HOST_GCC_AT_LEAST_6),y:y:) +ASSIMP_CXXFLAGS += -O2 +endif + ASSIMP_CONF_OPTS += -DASSIMP_BUILD_TESTS=OFF \ -DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) $(ASSIMP_CXXFLAGS)" |
