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https://github.com/gperftools/gperftools
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54 lines
2.3 KiB
CMake
54 lines
2.3 KiB
CMake
function(find_objcopy_with_weaken)
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find_program(OBJCOPY_EXECUTABLE "objcopy")
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message(STATUS "Looking for objcopy that supports weaken - ${OBJCOPY_EXECUTABLE}")
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if(NOT OBJCOPY_EXECUTABLE)
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return()
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endif()
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set(objcopy_test_src "${CMAKE_CURRENT_BINARY_DIR}/objcopy_test.c")
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set(objcopy_test_exe "${CMAKE_CURRENT_BINARY_DIR}/objcopy_test")
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file(WRITE ${objcopy_test_src} "void foo() {} int main() { return 0; }")
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try_compile(objcopy_test_compiled
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${CMAKE_CURRENT_BINARY_DIR} ${objcopy_test_src}
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COPY_FILE ${objcopy_test_exe})
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if(objcopy_test_compiled AND EXISTS ${objcopy_test_exe})
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execute_process(
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COMMAND ${OBJCOPY_EXECUTABLE} -W foo ${objcopy_test_exe}
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RESULT_VARIABLE objcopy_result)
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file(REMOVE ${objcopy_test_exe})
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endif()
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if(objcopy_result EQUAL 0)
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set(objcopy_weaken ON)
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endif()
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file(REMOVE ${objcopy_test_src})
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if(objcopy_weaken)
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set(objcopy_has_weaken "Success")
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set(HAVE_OBJCOPY_WEAKEN TRUE PARENT_SCOPE)
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set(OBJCOPY_EXECUTABLE "${OBJCOPY_EXECUTABLE}" PARENT_SCOPE)
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else()
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set(objcopy_has_weaken "Failed")
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endif()
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message(STATUS "objcopy has weaken support - ${objcopy_has_weaken}")
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endfunction(find_objcopy_with_weaken)
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function(weaken_object target)
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if(NOT HAVE_OBJCOPY_WEAKEN)
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return()
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endif()
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# If we have objcopy, make malloc/free/etc weak symbols. That way folks
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# can override our malloc if they want to (they can still use tc_malloc).
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# Note: the weird-looking symbols are the c++ memory functions:
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# (in order) new, new(nothrow), new[], new[](nothrow), delete, delete[]
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# In theory this will break if mangling changes, but that seems pretty
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# unlikely at this point. Just in case, I throw in versions with an
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# extra underscore as well, which may help on OS X.
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add_custom_command(TARGET ${target} POST_BUILD
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COMMAND "${OBJCOPY_EXECUTABLE}"
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-W malloc -W free -W realloc -W calloc -W cfree
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-W memalign -W posix_memalign -W valloc -W pvalloc
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-W aligned_alloc
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-W malloc_stats -W mallopt -W mallinfo -W nallocx
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-W _Znwm -W _ZnwmRKSt9nothrow_t -W _Znam -W _ZnamRKSt9nothrow_t
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-W _ZdlPv -W _ZdaPv
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-W __Znwm -W __ZnwmRKSt9nothrow_t -W __Znam -W __ZnamRKSt9nothrow_t
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-W __ZdlPv -W __ZdaPv "$<TARGET_FILE:${target}>")
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endfunction() |