4cd669ff93
Currently, building czmq statically fails for some architectures with undefined references to the math library: /usr/powerpc-buildroot-linux-uclibc/sysroot/usr/lib/libstdc++.a(compatibility-ldbl.o): In function `std::tr1::hash<long double>::operator()(long double) const': compatibility-ldbl.cc:(.text._ZNKSt3tr14hashIeEclEe+0x3c): undefined reference to `frexpl' It turns out that this is actually a problem with libstdc++. Depending on the arch, some functions will be in compatibility-ldbl.o. If you use any of these functions, that file will be linked in. And when that file is linked in, all the _other_ functions, which you actually don't use, are also linked in. And one of these functions is the template function hash<long double>::operator(), which uses frexpl. Requiring czmq to link with -lm is a bit weird, given that neither itself, nor any of its dependencies really need it... So ideally it should be fixed in libstdc++ itself. However, as upstream accepted a patch to link with -lm, we use this patch to fix static linking. Fixes: http://autobuild.buildroot.net/results/206/2061238affb685db998100a56c6571538d089a5b/ http://autobuild.buildroot.net/results/caf/caf002d213c9dd09df07858c5c199411ca8ddfa3/ http://autobuild.buildroot.net/results/568/568ac92d2f6d0604b9bf354ea9dca0a7cb5341f6/ http://autobuild.buildroot.net/results/945/9452982fc14f579c61b45a1a189db5f89aab3b80/ Cc: Arnout Vandecappelle <arnout@mind.be> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
29 lines
842 B
Makefile
29 lines
842 B
Makefile
################################################################################
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#
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# czmq
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#
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################################################################################
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CZMQ_VERSION = v3.0.2
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CZMQ_SITE = $(call github,zeromq,czmq,$(CZMQ_VERSION))
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CZMQ_PATCH = https://github.com/zeromq/czmq/commit/bcf583633e8b27a9bfbed1e4a717b9373f7446be.patch
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# Autoreconf required as we use the git tree
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CZMQ_AUTORECONF = YES
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CZMQ_INSTALL_STAGING = YES
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CZMQ_DEPENDENCIES = zeromq host-pkgconf
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CZMQ_LICENSE = MPLv2.0
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CZMQ_LICENSE_FILES = LICENSE
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# asciidoc is a python script that imports unicodedata, which is not in
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# host-python, so disable asciidoc entirely.
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CZMQ_CONF_ENV = ac_cv_prog_czmq_have_asciidoc=no
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define CZMQ_CREATE_CONFIG_DIR
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mkdir -p $(@D)/config
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endef
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CZMQ_POST_PATCH_HOOKS += CZMQ_CREATE_CONFIG_DIR
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$(eval $(autotools-package))
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