build: mp-units-contracts CMakeTarget added to reuse contract defin…

…ition in different separate targets

Refers to #581

example/CMakeLists.txt

@@ -28,32 +28,12 @@ if(${projectPrefix}BUILD_CXX_MODULES)
     target_compile_features(example_utils INTERFACE cxx_std_20)
     target_compile_definitions(example_utils INTERFACE ${projectPrefix}MODULES)
     target_include_directories(example_utils INTERFACE include)
+    target_link_libraries(example_utils INTERFACE mp-units-contracts)
 endif()
 
 add_library(example_utils-headers INTERFACE)
 target_include_directories(example_utils-headers INTERFACE include)
-
-if(${projectPrefix}API_CONTRACTS STREQUAL "NONE")
-    target_compile_definitions(mp-units-core INTERFACE ${projectPrefix}API_CONTRACTS=0)
-elseif(${projectPrefix}API_CONTRACTS STREQUAL "GSL-LITE")
-    if(NOT TARGET gsl::gsl-lite)
-        find_package(gsl-lite REQUIRED)
-    endif()
-    if(${projectPrefix}BUILD_CXX_MODULES)
-        target_link_libraries(example_utils INTERFACE gsl::gsl-lite)
-    endif()
-    target_link_libraries(example_utils-headers INTERFACE gsl::gsl-lite)
-    target_compile_definitions(mp-units-core INTERFACE ${projectPrefix}API_CONTRACTS=2)
-elseif(${projectPrefix}API_CONTRACTS STREQUAL "MS-GSL")
-    if(NOT TARGET Microsoft.GSL::GSL)
-        find_package(Microsoft.GSL REQUIRED)
-    endif()
-    if(${projectPrefix}BUILD_CXX_MODULES)
-        target_link_libraries(example_utils INTERFACE Microsoft.GSL::GSL)
-    endif()
-    target_link_libraries(example_utils-headers INTERFACE Microsoft.GSL::GSL)
-    target_compile_definitions(mp-units-core INTERFACE ${projectPrefix}API_CONTRACTS=3)
-endif()
+target_link_libraries(example_utils-headers INTERFACE mp-units-contracts)
 
 #
 # add_example(target <depependencies>...)

src/CMakeLists.txt

@@ -114,6 +114,7 @@ else()
 endif()
 
 # components/modules
+include(MPUnitsContracts)
 add_subdirectory(core)
 add_subdirectory(systems)
 

src/cmake/MPUnitsContracts.cmake

@@ -0,0 +1,41 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2018 Mateusz Pusz
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+add_library(mp-units-contracts INTERFACE)
+
+if(${projectPrefix}API_CONTRACTS STREQUAL "NONE")
+    target_compile_definitions(mp-units-contracts INTERFACE ${projectPrefix}API_CONTRACTS=0)
+elseif(${projectPrefix}API_CONTRACTS STREQUAL "GSL-LITE")
+    if(NOT TARGET gsl::gsl-lite)
+        find_package(gsl-lite REQUIRED)
+    endif()
+    target_link_libraries(mp-units-contracts INTERFACE gsl::gsl-lite)
+    target_compile_definitions(mp-units-contracts INTERFACE ${projectPrefix}API_CONTRACTS=2)
+elseif(${projectPrefix}API_CONTRACTS STREQUAL "MS-GSL")
+    if(NOT TARGET Microsoft.GSL::GSL)
+        find_package(Microsoft.GSL REQUIRED)
+    endif()
+    target_link_libraries(mp-units-contracts INTERFACE Microsoft.GSL::GSL)
+    target_compile_definitions(mp-units-contracts INTERFACE ${projectPrefix}API_CONTRACTS=3)
+endif()
+
+install(TARGETS mp-units-contracts EXPORT mp-unitsTargets)

src/core/CMakeLists.txt

@@ -108,21 +108,7 @@ if(NOT ${projectPrefix}API_FREESTANDING
 endif()
 
 # Contracts checking
-if(${projectPrefix}API_CONTRACTS STREQUAL "NONE")
-    target_compile_definitions(mp-units-core ${${projectPrefix}TARGET_SCOPE} ${projectPrefix}API_CONTRACTS=0)
-elseif(${projectPrefix}API_CONTRACTS STREQUAL "GSL-LITE")
-    if(NOT TARGET gsl::gsl-lite)
-        find_package(gsl-lite REQUIRED)
-    endif()
-    target_link_libraries(mp-units-core ${${projectPrefix}TARGET_SCOPE} gsl::gsl-lite)
-    target_compile_definitions(mp-units-core ${${projectPrefix}TARGET_SCOPE} ${projectPrefix}API_CONTRACTS=2)
-elseif(${projectPrefix}API_CONTRACTS STREQUAL "MS-GSL")
-    if(NOT TARGET Microsoft.GSL::GSL)
-        find_package(Microsoft.GSL REQUIRED)
-    endif()
-    target_link_libraries(mp-units-core ${${projectPrefix}TARGET_SCOPE} Microsoft.GSL::GSL)
-    target_compile_definitions(mp-units-core ${${projectPrefix}TARGET_SCOPE} ${projectPrefix}API_CONTRACTS=3)
-endif()
+target_link_libraries(mp-units-core ${${projectPrefix}TARGET_SCOPE} mp-units-contracts)
 
 # C++20 modules
 if(${projectPrefix}BUILD_CXX_MODULES)