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39 lines
1.3 KiB
CMake
39 lines
1.3 KiB
CMake
################################################################################
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#
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# :: Strict ABI
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#
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# Enabling the STRICT_ABI flag will generate and use an LD version script.
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# It ensures that the dynamic libraries (libtoxcore.so, libtoxav.so) only
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# export the symbols that are defined in their public API (tox.h and toxav.h,
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# respectively).
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#
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################################################################################
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function(make_version_script header ns lib)
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execute_process(
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COMMAND ${SHELL} -c "egrep '^\\w' ${header} | grep '${ns}_[a-z0-9_]*(' | grep -v '^typedef' | grep -o '${ns}_[a-z0-9_]*(' | egrep -o '\\w+' | sort -u"
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OUTPUT_VARIABLE ${lib}_SYMS
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OUTPUT_STRIP_TRAILING_WHITESPACE)
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string(REPLACE "\n" ";" ${lib}_SYMS ${${lib}_SYMS})
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set(${lib}_VERSION_SCRIPT "${CMAKE_BINARY_DIR}/${lib}.ld")
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file(WRITE ${${lib}_VERSION_SCRIPT}
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"{ global:\n")
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foreach(sym ${${lib}_SYMS})
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file(APPEND ${${lib}_VERSION_SCRIPT}
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"${sym};\n")
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endforeach(sym)
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file(APPEND ${${lib}_VERSION_SCRIPT}
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"local: *; };\n")
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set_target_properties(${lib}_shared PROPERTIES
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LINK_FLAGS -Wl,--version-script,${${lib}_VERSION_SCRIPT})
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endfunction()
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option(STRICT_ABI "Enforce strict ABI export in dynamic libraries" OFF)
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if(WIN32 OR APPLE)
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# Windows and OSX don't have this linker functionality.
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set(STRICT_ABI OFF)
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endif()
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