3684f62340
In commit "use export all symbols on cygwin" (2003-01-21) we started passing -Wl,--export-all-symbols when linking shared libraries. Now cygwin exports all symbols automatically if no symbols are explicitly exported. When symbols are explicitly exported we want to honor that narrow interface. Therefore this flag should not be passed. Change based on patch from issue #10122.
52 lines
2.6 KiB
CMake
52 lines
2.6 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 distributed 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(__CYGWIN_COMPILER_GNU)
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return()
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endif()
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set(__CYGWIN_COMPILER_GNU 1)
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# TODO: Is -Wl,--enable-auto-import now always default?
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set(CMAKE_EXE_LINKER_FLAGS_INIT "-Wl,--enable-auto-import")
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set(CMAKE_CREATE_WIN32_EXE "-mwindows")
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set(CMAKE_GNULD_IMAGE_VERSION
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"-Wl,--major-image-version,<TARGET_VERSION_MAJOR>,--minor-image-version,<TARGET_VERSION_MINOR>")
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macro(__cygwin_compiler_gnu lang)
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# Binary link rules.
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set(CMAKE_${lang}_CREATE_SHARED_MODULE
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"<CMAKE_${lang}_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_${lang}_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS> -o <TARGET> ${CMAKE_GNULD_IMAGE_VERSION} <OBJECTS> <LINK_LIBRARIES>")
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set(CMAKE_${lang}_CREATE_SHARED_LIBRARY
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"<CMAKE_${lang}_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <OBJECTS> <LINK_LIBRARIES>")
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set(CMAKE_${lang}_LINK_EXECUTABLE
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"<CMAKE_${lang}_COMPILER> <FLAGS> <CMAKE_${lang}_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> -Wl,--out-implib,<TARGET_IMPLIB> ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES>")
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set(CMAKE_SHARED_LIBRARY_${lang}_FLAGS "") # No -fPIC on cygwin
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# Initialize C link type selection flags. These flags are used when
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# building a shared library, shared module, or executable that links
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# to other libraries to select whether to use the static or shared
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# versions of the libraries.
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FOREACH(type SHARED_LIBRARY SHARED_MODULE EXE)
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SET(CMAKE_${type}_LINK_STATIC_${lang}_FLAGS "-Wl,-Bstatic")
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SET(CMAKE_${type}_LINK_DYNAMIC_${lang}_FLAGS "-Wl,-Bdynamic")
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ENDFOREACH(type)
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# TODO: Is -Wl,--enable-auto-import now always default?
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set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS} -Wl,--enable-auto-import")
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set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "${CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS}")
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endmacro()
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