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Fix version script test

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1. Don't reassign different versions to same symbol
2. Define symbols used
This fixes warnings with LLD linker (or errors if -Wl,--fatal-warnings is added by toolchain e.g. with Android NDK)
3. Add -Wl,--version-script to CMAKE_REQUIRED_LINK_OPTIONS instead of CMAKE_REQUIRED_FLAGS to prevent unused argument warning in compilation phase
(there is no need for _SAVE variable because we are inside a function and our CMAKE_REQUIRED_LINK_OPTIONS won't escase its scope)
4. Fix removal of version script file (incorrect file name was used)

Pick-to: 6.2 6.5
Task-number: QTBUG-111514
Change-Id: I0a1548c4268ad511760a0d4aa69ba7a0bdcbb0bc
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
This commit is contained in:
Alexey Rochev 2023-05-13 23:08:35 +03:00
parent 07d6d31a4c
commit d68dbd8b7d
1 changed files with 18 additions and 20 deletions
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38
cmake/QtBaseConfigureTests.cmake
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@ -120,35 +120,33 @@ function(qt_run_linker_version_script_support)
# seemingly succeeds. Explicitly disable the version script test on darwin platforms.
# Also makes no sense with MSVC-style command-line
if(NOT APPLE AND NOT MSVC)
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/version_flag.map" "VERS_1 { global: sym; };
VERS_2 { global: sym; }
VERS_1;
")
if(DEFINED CMAKE_REQUIRED_FLAGS)
set(CMAKE_REQUIRED_FLAGS_SAVE ${CMAKE_REQUIRED_FLAGS})
else()
set(CMAKE_REQUIRED_FLAGS "")
endif()
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} "-Wl,--version-script=\"${CMAKE_CURRENT_BINARY_DIR}/version_flag.map\"")
file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/version_flag.map" [=[
VERS_1 { global: sym1; };
VERS_2 { global: sym2; } VERS_1;
]=])
set(CMAKE_REQUIRED_LINK_OPTIONS "")
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS
"-Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/version_flag.map")
# Pass the linker that the main project uses to the version script compile test.
qt_internal_get_active_linker_flags(linker_flags)
if(linker_flags)
set(CMAKE_REQUIRED_LINK_OPTIONS ${linker_flags})
list(APPEND CMAKE_REQUIRED_LINK_OPTIONS ${linker_flags})
endif()
check_cxx_source_compiles("int main(void){return 0;}" HAVE_LD_VERSION_SCRIPT)
if(DEFINED CMAKE_REQUIRED_FLAGS_SAVE)
set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS_SAVE})
endif()
file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/conftest.map")
check_cxx_source_compiles([=[
int sym1;
int sym2;
int main(void) { return 0; }
]=] HAVE_LD_VERSION_SCRIPT)
file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/version_flag.map")
else()
set(HAVE_LD_VERSION_SCRIPT OFF)
endif()
set(TEST_ld_version_script "${HAVE_LD_VERSION_SCRIPT}" CACHE INTERNAL "linker version script support")
set(TEST_ld_version_script "${HAVE_LD_VERSION_SCRIPT}"
CACHE INTERNAL "linker version script support")
list(APPEND QT_BASE_CONFIGURE_TESTS_VARS_TO_EXPORT TEST_ld_version_script)
set(QT_BASE_CONFIGURE_TESTS_VARS_TO_EXPORT ${QT_BASE_CONFIGURE_TESTS_VARS_TO_EXPORT} CACHE INTERNAL "Test variables that should be exported")
set(QT_BASE_CONFIGURE_TESTS_VARS_TO_EXPORT ${QT_BASE_CONFIGURE_TESTS_VARS_TO_EXPORT}
CACHE INTERNAL "Test variables that should be exported")
endfunction()
function(qt_internal_ensure_latest_win_nt_api)