gitian: don't export any symbols from executable
This avoids conflicts between the libraries statically linked into bitcoin and any libraries we may link dynamically (such as Qt and OpenSSL, see issue #4094). It also avoids start-up overhead to not export any unnecessary symbols. To do this, build a linker script that marks all symbols as local.
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@ -48,8 +48,18 @@ script: |
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tar -zxf ../build/qt-linux${GBUILD_BITS}-4.6.4-gitian-r1.tar.gz
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cd ../build
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# Avoid exporting *any* symbols from the executable
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# This avoids conflicts between the libraries statically linked into bitcoin and any
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# libraries we may link dynamically (such as Qt and OpenSSL, see issue #4094).
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# It also avoids start-up overhead to not export any unnecessary symbols.
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# To do this, build a linker script that marks all symbols as local.
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LINKER_SCRIPT=$HOME/build/linker_version_script
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echo '
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{
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local: *;
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};' > $LINKER_SCRIPT
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function do_configure {
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./configure "$@" --enable-upnp-default --prefix=$STAGING --with-protoc-bindir=$STAGING/host/bin --with-boost=$STAGING --disable-maintainer-mode --disable-dependency-tracking PKG_CONFIG_PATH="$STAGING/lib/pkgconfig" CPPFLAGS="-I$STAGING/include ${OPTFLAGS}" LDFLAGS="-L$STAGING/lib ${OPTFLAGS}" CXXFLAGS="-frandom-seed=bitcoin ${OPTFLAGS}" BOOST_CHRONO_EXTRALIBS="-lrt" --enable-glibc-back-compat
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./configure "$@" --enable-upnp-default --prefix=$STAGING --with-protoc-bindir=$STAGING/host/bin --with-boost=$STAGING --disable-maintainer-mode --disable-dependency-tracking PKG_CONFIG_PATH="$STAGING/lib/pkgconfig" CPPFLAGS="-I$STAGING/include ${OPTFLAGS}" LDFLAGS="-L$STAGING/lib -Wl,--version-script=$LINKER_SCRIPT ${OPTFLAGS}" CXXFLAGS="-frandom-seed=bitcoin ${OPTFLAGS}" BOOST_CHRONO_EXTRALIBS="-lrt" --enable-glibc-back-compat
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}
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#
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cd bitcoin
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