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74720a298c
By default, we generate an export list for a shared library and pass that file on the link line. The problem was that it could not be overridden by a target when a specific export file is being used. Multiple `-bE` flags on the link are overridden by subsequent `-bE` flags, so only the last one is used. Fixes: #13282
55 lines
2.5 KiB
CMake
55 lines
2.5 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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# This module is shared by multiple languages; use include blocker.
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if(__COMPILER_XL)
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return()
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endif()
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set(__COMPILER_XL 1)
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include(Compiler/CMakeCommonCompilerMacros)
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# Find the CreateExportList program that comes with this toolchain.
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find_program(CMAKE_XL_CreateExportList
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NAMES CreateExportList
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DOC "IBM XL CreateExportList tool"
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)
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macro(__compiler_xl lang)
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# Feature flags.
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set(CMAKE_${lang}_VERBOSE_FLAG "-V")
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set(CMAKE_${lang}_COMPILE_OPTIONS_PIC "-qpic")
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set(CMAKE_${lang}_COMPILE_OPTIONS_PIE "-qpic")
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set(CMAKE_${lang}_RESPONSE_FILE_FLAG "-qoptfile=")
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set(CMAKE_${lang}_RESPONSE_FILE_LINK_FLAG "-qoptfile=")
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set(CMAKE_${lang}_LINKER_WRAPPER_FLAG "-Wl,")
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set(CMAKE_${lang}_LINKER_WRAPPER_FLAG_SEP ",")
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string(APPEND CMAKE_${lang}_FLAGS_DEBUG_INIT " -g")
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string(APPEND CMAKE_${lang}_FLAGS_RELEASE_INIT " -O")
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string(APPEND CMAKE_${lang}_FLAGS_MINSIZEREL_INIT " -O")
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string(APPEND CMAKE_${lang}_FLAGS_RELWITHDEBINFO_INIT " -g")
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set(CMAKE_${lang}_CREATE_PREPROCESSED_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
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set(CMAKE_${lang}_CREATE_ASSEMBLY_SOURCE "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
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set(CMAKE_DEPFILE_FLAGS_${lang} "-MF <DEPFILE> -qmakedep=gcc")
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# CMAKE_XL_CreateExportList is part of the AIX XL compilers but not the linux ones.
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# If we found the tool, we'll use it to create exports, otherwise stick with the regular
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# create shared library compile line.
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if (CMAKE_XL_CreateExportList)
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# The compiler front-end passes all object files, archive files, and shared
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# library files named on the command line to CreateExportList to create a
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# list of all symbols to be exported from the shared library. This causes
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# all archive members to be copied into the shared library whether they are
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# needed or not. Instead we run the tool ourselves to pass only the object
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# files so that we export only the symbols actually provided by the sources.
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set(CMAKE_${lang}_CREATE_SHARED_LIBRARY
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"${CMAKE_XL_CreateExportList} <OBJECT_DIR>/objects.exp <OBJECTS>"
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"<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> -Wl,-bE:<OBJECT_DIR>/objects.exp <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>"
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)
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endif()
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endmacro()
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