[Buildroot] [git commit branch/2019.02.x] package/opencv3: fix build due to gcc bug 68485
Peter Korsgaard
peter at korsgaard.com
Sun Jan 12 10:36:28 UTC 2020
commit: https://git.buildroot.net/buildroot/commit/?id=412d835bc729d958316c1d11e22f53dfc378de92
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/2019.02.x
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 at gmail.com>
Reviewed-by: Giulio Benetti <giulio.benetti at micronovasrl.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
(cherry picked from commit 87040137a38012e9ae680098fc5facda0ea0fcf3)
Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
package/opencv3/opencv3.mk | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/package/opencv3/opencv3.mk b/package/opencv3/opencv3.mk
index 5bc6376ca3..8fb97b5135 100644
--- a/package/opencv3/opencv3.mk
+++ b/package/opencv3/opencv3.mk
@@ -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)" \
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