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authorThomas Petazzoni <thomas.petazzoni@free-electrons.com>2017-02-26 22:38:26 (GMT)
committerThomas Petazzoni <thomas.petazzoni@free-electrons.com>2017-02-27 20:38:49 (GMT)
commit68cebedeb977396f64f5f591f5e93f34fab8e0a8 (patch)
tree1d01cce6ba576b380c3f6c985879e24ef6597009
parent0fae8618a3c9f180da432ce904d1a37d15ea50bd (diff)
downloadbuildroot-68cebedeb977396f64f5f591f5e93f34fab8e0a8.tar.gz
buildroot-68cebedeb977396f64f5f591f5e93f34fab8e0a8.tar.bz2
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.mk8
1 files changed, 8 insertions, 0 deletions
diff --git a/package/assimp/assimp.mk b/package/assimp/assimp.mk
index 08893ff..298e121 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)"