Add support for -fcoroutines in addition to -fcoroutines-ts

Author: andreasbuhr

cmake/FindCppcoroCoroutines.cmake

@@ -3,17 +3,21 @@ include(CheckIncludeFileCXX)
 include(FindPackageHandleStandardArgs)
 
 check_cxx_compiler_flag(/await Coroutines_SUPPORTS_MS_FLAG)
-check_cxx_compiler_flag(-fcoroutines-ts Coroutines_SUPPORTS_GNU_FLAG)
-if(Coroutines_SUPPORTS_MS_FLAG OR Coroutines_SUPPORTS_GNU_FLAG)
+check_cxx_compiler_flag(-fcoroutines-ts Coroutines_ts_SUPPORTS_GNU_FLAG)
+check_cxx_compiler_flag(-fcoroutines Coroutines_SUPPORTS_GNU_FLAG)
+if(Coroutines_SUPPORTS_MS_FLAG OR Coroutines_ts_SUPPORTS_GNU_FLAG OR Coroutines_SUPPORTS_GNU_FLAG)
     set(Coroutines_COMPILER_SUPPORT ON)
 endif()
 
 if(Coroutines_SUPPORTS_MS_FLAG)
     check_include_file_cxx("coroutine" Coroutines_STANDARD_LIBRARY_SUPPORT "/await")
     check_include_file_cxx("experimental/coroutine" Coroutines_EXPERIMENTAL_LIBRARY_SUPPORT "/await")
-elseif(Coroutines_SUPPORTS_GNU_FLAG)
+elseif(Coroutines_ts_SUPPORTS_GNU_FLAG)
     check_include_file_cxx("coroutine" Coroutines_STANDARD_LIBRARY_SUPPORT "-fcoroutines-ts")
     check_include_file_cxx("experimental/coroutine" Coroutines_EXPERIMENTAL_LIBRARY_SUPPORT "-fcoroutines-ts")
+elseif(Coroutines_SUPPORTS_GNU_FLAG)
+    check_include_file_cxx("coroutine" Coroutines_STANDARD_LIBRARY_SUPPORT "-fcoroutines")
+    check_include_file_cxx("experimental/coroutine" Coroutines_EXPERIMENTAL_LIBRARY_SUPPORT "-fcoroutines")
 endif()
 
 if(Coroutines_EXPERIMENTAL_LIBRARY_SUPPORT OR Coroutines_STANDARD_LIBRARY_SUPPORT)
@@ -31,6 +35,8 @@ endif()
 add_library(cppcoro::coroutines INTERFACE IMPORTED)
 if(Coroutines_SUPPORTS_MS_FLAG)
     target_compile_options(cppcoro::coroutines INTERFACE /await)
-elseif(Coroutines_SUPPORTS_GNU_FLAG)
+elseif(Coroutines_ts_SUPPORTS_GNU_FLAG)
     target_compile_options(cppcoro::coroutines INTERFACE -fcoroutines-ts)
+elseif(Coroutines_SUPPORTS_GNU_FLAG)
+    target_compile_options(cppcoro::coroutines INTERFACE -fcoroutines)
 endif()