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From: Ben Hutchings <ben@decadent.org.uk>
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Subject: Do not use -fPIC when linking executables
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cmake includes ${CMAKE_SHARED_LIBRARY_C_FLAGS} in the command line to
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link an executable, and by default this is -fPIC. Either the use or
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the definition of this variable is wrong, because executables should
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not be linked with this option by default.
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.
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It's not entirely obvious how this variable gets into the command
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line, but you can verify that it does by changing its value to e.g. -D
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SHARED and running make VERBOSE=1.
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.
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Any special options needed for linking with shared libraries can be put
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in CMAKE_SHARED_LIBRARY_LINK_C_FLAGS.
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Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=478404
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--- a/Source/cmMakefileExecutableTargetGenerator.cxx
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+++ b/Source/cmMakefileExecutableTargetGenerator.cxx
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@@ -199,11 +199,6 @@
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std::string flags;
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std::string linkFlags;
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- // Add flags to deal with shared libraries. Any library being
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- // linked in might be shared, so always use shared flags for an
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- // executable.
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- this->LocalGenerator->AddSharedFlags(linkFlags, linkLanguage, true);
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-
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// Add flags to create an executable.
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this->LocalGenerator->
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AddConfigVariableFlags(linkFlags, "CMAKE_EXE_LINKER_FLAGS",
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