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package/protobuf: work around gcc bug 85180

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With Microblaze Gcc version < 8.x the build hangs due to gcc bug
85180: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85180. The bug
shows up when building protobuf with optimization but not when building
with -O0. To work around this, if BR2_TOOLCHAIN_HAS_GCC_BUG_85180=y we
force using -O0.

Fixes:
http://autobuild.buildroot.net/results/73dc9610a13d6e14eec58d529617210d93d5dec4/

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
[Arnout: fix variable name]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit e975f1cbef)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Giulio Benetti 2019-09-18 11:11:42 +02:00 committed by Peter Korsgaard
parent d08a4ffa00
commit a0f7409f02
1 changed files with 8 additions and 0 deletions
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8
package/protobuf/protobuf.mk
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@ -17,6 +17,14 @@ PROTOBUF_LICENSE_FILES = LICENSE
PROTOBUF_DEPENDENCIES = host-protobuf
PROTOBUF_CONF_OPTS = --with-protoc=$(HOST_DIR)/bin/protoc
PROTOBUF_CXXFLAGS = $(TARGET_CXXFLAGS)
ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_85180),y)
PROTOBUF_CXXFLAGS += -O0
endif
PROTOBUF_CONF_ENV = CXXFLAGS="$(PROTOBUF_CXXFLAGS)"
ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
PROTOBUF_CONF_ENV += LIBS=-latomic
endif