Notes
(0018625) Brad King (manager) 2009-12-01 14:26	The following commit addresses this issue: --------------------------------------------------------------------------- Drop -rdynamic from Linux build rules This is a GNU-specific option that should not be specified for all compilers on Linux. It tells the GNU compiler to pass -export-dynamic to the linker to export symbols from executables for use by plugins. Since we provide the ENABLE_EXPORTS target property to do the same thing in a cross-platform way, there is no need to pass -rdynamic always. Since the option is not useful for GNU tools and breaks other tools on Linux we simply remove it from CMAKE_SHARED_LIBRARY_LINK_<lang>_FLAGS. This also allows us to stop setting the variable in other Linux compiler files just to erase the bad flag. --------------------------------------------------------------------------- /cvsroot/CMake/CMake/Modules/Compiler/SunPro-C.cmake,v <-- Modules/Compiler/SunPro-C.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Compiler/SunPro-CXX.cmake,v <-- Modules/Compiler/SunPro-CXX.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Compiler/SunPro-Fortran.cmake,v <-- Modules/Compiler/SunPro-Fortran.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/GNU.cmake,v <-- Modules/Platform/GNU.cmake new revision: 1.2; previous revision: 1.1 /cvsroot/CMake/CMake/Modules/Platform/Linux-PGI-C.cmake,v <-- Modules/Platform/Linux-PGI-C.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-PGI-CXX.cmake,v <-- Modules/Platform/Linux-PGI-CXX.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-PGI-Fortran.cmake,v <-- Modules/Platform/Linux-PGI-Fortran.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-XL-C.cmake,v <-- Modules/Platform/Linux-XL-C.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-XL-CXX.cmake,v <-- Modules/Platform/Linux-XL-CXX.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-XL-Fortran.cmake,v <-- Modules/Platform/Linux-XL-Fortran.cmake new revision: 1.3; previous revision: 1.2 /cvsroot/CMake/CMake/Modules/Platform/Linux-como.cmake,v <-- Modules/Platform/Linux-como.cmake new revision: 1.6; previous revision: 1.5 /cvsroot/CMake/CMake/Modules/Platform/Linux.cmake,v <-- Modules/Platform/Linux.cmake new revision: 1.20; previous revision: 1.19

(0018642) Brad King (manager) 2009-12-02 09:46	The Linux builds on our dashboard look good after this fix. I'll schedule it for 2.8.1.

(0019106) Brad King (manager) 2010-01-12 17:10	We need to export symbols from any executable on Linux that uses dlopen() even if we do not export an API explicitly. The compiler may need RTTI symbols as an implementation detail. Furthermore, we still pass export flags when linking executables on other platforms. If we want to do change behavior on Linux we should do it on all platforms at once.

(0019107) Brad King (manager) 2010-01-12 17:15	It is likely that many projects already use the workaround mentioned in issue 0005833: SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "") SET(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "") to erase -rdynamic. Restoring the flag to match 2.8.0 behavior will have to be done in this variable, but only on compilers known to support it.

(0019113) Brad King (manager) 2010-01-13 08:14	I've committed changes to restore -rdynamic. Create Linux GNU compiler flag consolidation macro /cvsroot/CMake/CMake/Modules/Platform/Linux-GNU-C.cmake,v <-- Modules/Platform/Linux-GNU-C.cmake initial revision: 1.1 /cvsroot/CMake/CMake/Modules/Platform/Linux-GNU-CXX.cmake,v <-- Modules/Platform/Linux-GNU-CXX.cmake initial revision: 1.1 /cvsroot/CMake/CMake/Modules/Platform/Linux-GNU-Fortran.cmake,v <-- Modules/Platform/Linux-GNU-Fortran.cmake new revision: 1.4; previous revision: 1.3 /cvsroot/CMake/CMake/Modules/Platform/Linux-GNU.cmake,v <-- Modules/Platform/Linux-GNU.cmake initial revision: 1.1 Restore -rdynamic in Linux build rules /cvsroot/CMake/CMake/Modules/Platform/Linux-GNU.cmake,v <-- Modules/Platform/Linux-GNU.cmake new revision: 1.2; previous revision: 1.1 /cvsroot/CMake/CMake/Modules/Platform/Linux-Intel.cmake,v <-- Modules/Platform/Linux-Intel.cmake new revision: 1.4; previous revision: 1.3

(0019114) Brad King (manager) 2010-01-13 08:17	I'm closing this because Linux.cmake no longer hard-codes -rdynamic and prior behavior for compilers that support it is preserved. If we want to avoid exporting symbols from executables that is a separate issue that should be tackled on all platforms at once.

Issue History
Date Modified	Username	Field	Change
2009-12-01 14:23	Brad King	New Issue
2009-12-01 14:23	Brad King	Relationship added	parent of 0009798
2009-12-01 14:24	Brad King	Relationship replaced	related to 0009798
2009-12-01 14:24	Brad King	Status	new => assigned
2009-12-01 14:24	Brad King	Assigned To	=> Brad King
2009-12-01 14:26	Brad King	Note Added: 0018625
2009-12-02 09:46	Brad King	Note Added: 0018642
2009-12-02 09:46	Brad King	Status	assigned => closed
2009-12-02 09:46	Brad King	Resolution	open => fixed
2010-01-12 17:10	Brad King	Note Added: 0019106
2010-01-12 17:10	Brad King	Status	closed => feedback
2010-01-12 17:10	Brad King	Resolution	fixed => reopened
2010-01-12 17:10	Brad King	Relationship added	related to 0009659
2010-01-12 17:11	Brad King	Relationship added	related to 0005833
2010-01-12 17:15	Brad King	Note Added: 0019107
2010-01-13 08:14	Brad King	Note Added: 0019113
2010-01-13 08:17	Brad King	Note Added: 0019114
2010-01-13 08:17	Brad King	Status	feedback => closed
2010-01-13 08:17	Brad King	Resolution	reopened => fixed
2015-06-24 08:42	Brad King	Relationship added	related to 0015630