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package/opencv3: fix build due to gcc bug 68485

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With Microblaze Gcc version <= 9.x the build fails due to gcc bug 68485:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485. The bug show up when
building opencv3 with optimization but not when building with -O0. To
work around this, if BR2_TOOLCHAIN_HAS_GCC_BUG_68458=y, we force using
-O0.

Fixes:
 - http://autobuild.buildroot.org/results/c78eac84d1c5a6702e7759cd5364da1c3e399b4b

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 87040137a3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Fabrice Fontaine 2019-05-31 18:26:45 +02:00 committed by Peter Korsgaard
parent a448bc9509
commit 412d835bc7
1 changed files with 4 additions and 0 deletions
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4
package/opencv3/opencv3.mk
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@ -23,6 +23,10 @@ ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_64735),y)
OPENCV3_CXXFLAGS += -DCV__EXCEPTION_PTR=0
endif
ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_68485),y)
OPENCV3_CXXFLAGS += -O0
endif
# OpenCV component options
OPENCV3_CONF_OPTS += \
-DCMAKE_CXX_FLAGS="$(OPENCV3_CXXFLAGS)" \