Test static linking with LINK_SEARCH_START_STATIC
Add "LinkStatic" test that links a static executable against "libm.a". Pass both "/usr/lib/libm.a" and "-lm" to target_link_libraries to trigger the link type logic for both cases. If CMake incorrectly switches the link type to shared for "-lm" then the link will fail.
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@ -999,6 +999,22 @@ ${CMake_BINARY_DIR}/bin/cmake -DVERSION=master -P ${CMake_SOURCE_DIR}/Utilities/
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SET_TESTS_PROPERTIES ( linkorder2 PROPERTIES DEPENDS linkorder1)
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SET_TESTS_PROPERTIES ( SimpleInstall-Stage2 PROPERTIES DEPENDS SimpleInstall)
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# Test static linking on toolchains known to support it.
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IF("${CMAKE_C_COMPILER_ID}" MATCHES "^(GNU)$"
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AND NOT APPLE AND NOT WIN32 AND NOT CYGWIN
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AND EXISTS "/usr/lib/libm.a")
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ADD_TEST(LinkStatic ${CMAKE_CTEST_COMMAND}
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--build-and-test
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"${CMake_SOURCE_DIR}/Tests/LinkStatic"
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"${CMake_BINARY_DIR}/Tests/LinkStatic"
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--build-generator ${CMAKE_TEST_GENERATOR}
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--build-makeprogram ${CMAKE_TEST_MAKEPROGRAM}
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--build-project LinkStatic
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--build-options -DMATH_LIBRARY:FILEPATH=/usr/lib/libm.a
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--test-command LinkStatic
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)
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ENDIF()
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IF(NOT CMAKE_TEST_DIFFERENT_GENERATOR)
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ADD_TEST(kwsys ${CMAKE_CTEST_COMMAND}
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--build-and-test
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@ -0,0 +1,27 @@
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cmake_minimum_required(VERSION 2.8.4.20110303 FATAL_ERROR)
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project(LinkStatic C)
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if(NOT "${CMAKE_C_COMPILER_ID}" MATCHES "^(GNU)$")
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message(FATAL_ERROR "This test works only with the GNU compiler!")
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endif()
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find_library(MATH_LIBRARY NAMES libm.a)
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if(MATH_LIBRARY)
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get_filename_component(MATH_LIB_DIR ${MATH_LIBRARY} PATH)
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link_directories(${MATH_LIB_DIR})
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# Name the library both with a full path and as "-lm" to
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# activate the link type switching code for both cases.
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# If the second one links shared then the link will fail.
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set(MATH_LIBRARIES ${MATH_LIBRARY} -lm)
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else()
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message(FATAL_ERROR "Cannot find libm.a needed for this test")
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endif()
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add_executable(LinkStatic LinkStatic.c)
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target_link_libraries(LinkStatic ${MATH_LIBRARIES})
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# Enable static linking.
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set(LinkStatic_FLAG "-static" CACHE STRING "Flag to link statically")
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set_property(TARGET LinkStatic PROPERTY LINK_FLAGS "${LinkStatic_FLAG}")
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set_property(TARGET LinkStatic PROPERTY LINK_SEARCH_START_STATIC 1)
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#set_property(TARGET LinkStatic PROPERTY LINK_SEARCH_END_STATIC 1) # insufficient
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@ -0,0 +1,5 @@
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#include <math.h>
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int main(void)
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{
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return (int)sin(0);
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}
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