mirror of
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0e2ee0e6e8
For some toolchains, libstdc++ uses pthread symbols:
.../lib/libstdc++.a(eh_alloc.o): In function `__gnu_cxx::__mutex::lock()':
eh_alloc.cc:(.text._ZN9__gnu_cxx7__mutex4lockEv[_ZN9__gnu_cxx7__mutex4lockEv]+0x2):
undefined reference to `pthread_mutex_lock'
and a lot of other pthread symbols...
However, when doing a static build, there is no way for the linker to know
what library to link in, so the build fails miserably if -pthread is not
specified at link time.
Fixes:
http://autobuild.buildroot.org/results/15e/15ecaa23f0116e8120b3d62e553c838f0303df35/
http://autobuild.buildroot.org/results/f0a/f0abe301816e39eb4ae26d3e8cd42d90901d5ac5/
[Peter: only perform workaround if toolchain has threads support, tweak comment]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
29 lines
964 B
Makefile
29 lines
964 B
Makefile
################################################################################
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#
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# snappy
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#
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################################################################################
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SNAPPY_VERSION = 1ff9be9b8fafc8528ca9e055646f5932aa5db9c4
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SNAPPY_SITE = $(call github,google,snappy,$(SNAPPY_VERSION))
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SNAPPY_LICENSE = BSD-3c
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SNAPPY_LICENSE_FILES = COPYING
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# from git
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SNAPPY_AUTORECONF = YES
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SNAPPY_DEPENDENCIES = host-pkgconf
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SNAPPY_INSTALL_STAGING = YES
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# Disable tests
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SNAPPY_CONF_OPTS = --disable-gtest
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# libsnappy links with libstdc++. Some libstdc++/arch variants use
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# pthread symbols for internal locking if built with thead
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# support. libstdc++ does not have a .pc file, and its .la file does
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# not mention -pthread. So, static linkig to libstdc++ will fail if
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# -pthread is not explicity linked to. Only do that for static builds.
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ifeq ($(BR2_STATIC_LIBS)$(BR2_TOOLCHAIN_HAS_THREADS),yy)
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SNAPPY_CONF_OPTS += LIBS=-pthread
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endif
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$(eval $(autotools-package))
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