cmake: only set C and C++ standard for "core targets"

core targets = developed by us

cmake_configure.cmake

@@ -5,11 +5,6 @@ add_library(rw_checks INTERFACE)
 add_library(openrw::checks ALIAS rw_checks)
 target_link_libraries(rw_interface INTERFACE rw_checks)
 
-# target_compile_features(rw_interface INTERFACE cxx_std_14) is not supported by CMake 3.2
-set(CMAKE_CXX_EXTENSIONS OFF)
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
     target_compile_options(rw_interface
         INTERFACE
@@ -189,25 +184,36 @@ endforeach()
 
 function(openrw_target_apply_options)
     set(IWYU_MAPPING "${PROJECT_SOURCE_DIR}/openrw_iwyu.imp")
-    cmake_parse_arguments("ORW" "INSTALL;INSTALL_PDB;COVERAGE" "TARGET" "COVERAGE_EXCEPT" ${ARGN})
-    if(CHECK_IWYU)
-        iwyu_check(TARGET "${ORW_TARGET}"
-            EXTRA_OPTS
-                "--mapping_file=${IWYU_MAPPING}"
-        )
-    endif()
+    cmake_parse_arguments("ORW" "CORE;INSTALL;INSTALL_PDB;COVERAGE" "TARGET" "COVERAGE_EXCEPT" ${ARGN})
 
     if(TEST_COVERAGE AND ORW_COVERAGE)
         coverage_add_target("${ORW_TARGET}" EXCEPT ${ORW_COVERAGE_EXCEPT})
     endif()
 
-    if(CHECK_CLANGTIDY)
-        clang_tidy_check_target(
-            TARGET "${ORW_TARGET}"
-            FORMAT_STYLE "file"
-            FIX "${CHECK_CLANGTIDY_FIX}"
-            CHECK_ALL
-        )
+    if(ORW_CORE)
+        if(CHECK_IWYU)
+            iwyu_check(TARGET "${ORW_TARGET}"
+                EXTRA_OPTS
+                    "--mapping_file=${IWYU_MAPPING}"
+            )
+        endif()
+
+        set_target_properties("${ORW_TARGET}"
+            PROPERTIES
+                CXX_EXTENSIONS OFF
+                CXX_STANDARD 17
+                C_EXTENSIONS OFF
+                C_STANDARD 11
+            )
+
+        if(CHECK_CLANGTIDY)
+            clang_tidy_check_target(
+                TARGET "${ORW_TARGET}"
+                FORMAT_STYLE "file"
+                FIX "${CHECK_CLANGTIDY_FIX}"
+                CHECK_ALL
+            )
+        endif()
     endif()
 
     if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")

external/microprofile/CMakeLists.txt

@@ -25,4 +25,10 @@ openrw_target_apply_options(
     TARGET microprofile
 )
 
+set_target_properties(microprofile
+    PROPERTIES
+        CXX_EXTENSIONS OFF
+        CXX_STANDARD 11
+    )
+
 add_library(microprofile::microprofile ALIAS microprofile)

rwcore/CMakeLists.txt

@@ -1,4 +1,3 @@
-
 add_library(rwcore
     # GL stuff is only here temporarily, hoping to move it back to rwengine
     gl/gl_core_3_3.c
@@ -67,6 +66,7 @@ target_link_libraries(rwcore
     )
 
 openrw_target_apply_options(TARGET rwcore
+    CORE
     COVERAGE
     COVERAGE_EXCEPT gl/gl_core_3_3.c gl/gl_core_3_3.h
     )

rwengine/CMakeLists.txt

@@ -169,6 +169,7 @@ target_include_directories(rwengine
     )
 
 openrw_target_apply_options(TARGET rwengine
+    CORE
     COVERAGE
     )
 

rwgame/CMakeLists.txt

@@ -46,6 +46,7 @@ add_library(librwgame STATIC
 
 openrw_target_apply_options(
     TARGET librwgame
+    CORE
     COVERAGE
     )
 
@@ -78,6 +79,7 @@ target_link_libraries(rwgame
 
 openrw_target_apply_options(
     TARGET rwgame
+    CORE
     COVERAGE
     INSTALL INSTALL_PDB
     )

rwtools/rwfont/CMakeLists.txt

@@ -13,6 +13,7 @@ target_link_libraries(rwfontmap
 
 openrw_target_apply_options(
     TARGET rwfontmap
+    CORE
     COVERAGE
     INSTALL INSTALL_PDB
     )

rwviewer/CMakeLists.txt

@@ -56,6 +56,7 @@ target_link_libraries(rwviewer
 
 openrw_target_apply_options(
     TARGET rwviewer
+    CORE
     COVERAGE
     INSTALL INSTALL_PDB
     )

tests/CMakeLists.txt

@@ -72,6 +72,7 @@ target_link_libraries(rwtests
 
 openrw_target_apply_options(
     TARGET rwtests
+    CORE
     COVERAGE
     INSTALL INSTALL_PDB
     )