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project(ObjectLibraryA C)
# Add -fPIC so objects can be used in shared libraries.
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
add_definitions(-DA_DEF)
add_custom_command(
OUTPUT a1.c
DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/a1.c.in
COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/a1.c.in
${CMAKE_CURRENT_BINARY_DIR}/a1.c
)
# Remove the custom command output to be sure it runs in an
# incremental test.
file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/a.cmake)
add_custom_command(
OUTPUT a.cmake
COMMAND ${CMAKE_COMMAND} -E touch ${CMAKE_CURRENT_BINARY_DIR}/a.cmake
)
add_library(A OBJECT a1.c a2.c a.cmake)
target_include_directories(A PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
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