baa33acbda
The GNU compiler front-ends on AIX invoke the linker with flags of the form "-L/path/to/gnu/runtime/lib" to tell ld where to find the language runtime libraries. They depend on the default libpath behavior documented in "man ld" to add the -L paths also to the runtime libpath so the dynamic loader can find the language runtime libraries. This differs from platforms whose linkers have distinct -rpath flags that non-system compilers can use to tell the dynamic loader where to find their language runtime libraries. Since commit 96fd5909 (Implement linking with paths to library files, 2008-01-22) CMake always passes "-Wl,-blibpath:" followed by any project-defined RPATH plus "/usr/lib:/lib" in order to explicitly set the runtime libpath and avoid getting all the project -L paths in the runtime libpath. The explicit libpath prevents the GNU compiler runtime library -L paths from being placed in the libpath and then the dynamic loader fails to find the language runtime libraries. CMake already detects the implicit link directories for each language since commit 07ea19ad (Implicit link info for C, CXX, and Fortran, 2009-07-23). Add the implicit link directories to the explicit runtime libpath for GNU compilers on AIX to fix this use case.
28 lines
1.2 KiB
CMake
28 lines
1.2 KiB
CMake
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#=============================================================================
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# Copyright 2002-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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# This module is shared by multiple languages; use include blocker.
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if(__AIX_COMPILER_GNU)
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return()
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endif()
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set(__AIX_COMPILER_GNU 1)
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macro(__aix_compiler_gnu lang)
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set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG "-Wl,-blibpath:")
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set(CMAKE_SHARED_LIBRARY_RUNTIME_${lang}_FLAG_SEP ":")
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set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS} -Wl,-G,-brtl,-bnoipath")
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set(CMAKE_SHARED_LIBRARY_LINK_${lang}_FLAGS "-Wl,-brtl,-bnoipath,-bexpall") # +s, flag for exe link to use shared lib
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set(CMAKE_${lang}_USE_IMPLICIT_LINK_DIRECTORIES_IN_RUNTIME_PATH 1)
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endmacro()
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