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Make sure find_package(Sqlpp11) can be done multiple times (#306)

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It is expected that CMake packages can be found multiple times without
errors. The target generated and defined by CMake, e.g. in a
*Targets.cmake file have a similar guard.
This commit is contained in:
Sylvain Joubert
2020-02-08 08:38:41 +01:00
committed by GitHub
parent 183a05156a
commit c1c1626242
1 changed files with 10 additions and 11 deletions
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21
cmake/Sqlpp11Config.cmake
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@@ -31,15 +31,14 @@ find_dependency(HinnantDate REQUIRED)
include("${CMAKE_CURRENT_LIST_DIR}/Sqlpp11Targets.cmake")
# Import "ddl2cpp" script
if(TARGET sqlpp11::ddl2cpp)
message(FATAL_ERROR "Target sqlpp11::ddl2cpp already defined")
if(NOT TARGET sqlpp11::ddl2cpp)
get_filename_component(sqlpp11_ddl2cpp_location "${CMAKE_CURRENT_LIST_DIR}/../../../bin/sqlpp11-ddl2cpp" REALPATH)
if(NOT EXISTS "${sqlpp11_ddl2cpp_location}")
message(FATAL_ERROR "The imported target sqlpp11::ddl2cpp references the file '${sqlpp11_ddl2cpp_location}' but this file does not exists.")
endif()
add_executable(sqlpp11::ddl2cpp IMPORTED)
set_target_properties(sqlpp11::ddl2cpp PROPERTIES
IMPORTED_LOCATION "${sqlpp11_ddl2cpp_location}"
)
unset(sqlpp11_ddl2cpp_location)
endif()
get_filename_component(sqlpp11_ddl2cpp_location "${CMAKE_CURRENT_LIST_DIR}/../../../bin/sqlpp11-ddl2cpp" REALPATH)
if(NOT EXISTS "${sqlpp11_ddl2cpp_location}")
message(FATAL_ERROR "The imported target sqlpp11::ddl2cpp references the file '${sqlpp11_ddl2cpp_location}' but this file does not exists.")
endif()
add_executable(sqlpp11::ddl2cpp IMPORTED)
set_target_properties(sqlpp11::ddl2cpp PROPERTIES
IMPORTED_LOCATION "${sqlpp11_ddl2cpp_location}"
)
unset(sqlpp11_ddl2cpp_location)