correct [[noreturn]]

Author: scivision

src/error/lib.c

@@ -1,5 +1,5 @@
 #include <stdlib.h>
 
-_Noreturn void err_c(int code){
+void err_c(int code){
   exit(code);
 }

src/error/lib.cpp

@@ -1,7 +1,7 @@
 #include <cstdlib>
 
-extern "C" [[ noreturn ]] void err_cpp(int);
+#include "my_error.h"
 
-[[ noreturn ]] void err_cpp(int code){
+void err_cpp(int code){
   exit(code);
 }

src/error/my_error.h

@@ -2,8 +2,22 @@
 extern "C" {
 #endif
 
+#if !defined(__has_c_attribute)
+#  define __has_c_attribute(x)  0
+#endif
+
+#if __has_c_attribute(noreturn)
+[[noreturn]]
+#elif __has_c_attribute(_Noreturn)
+[[_Noreturn]]
+#endif
 void err_c(int);
+
+#if __has_cpp_attribute(noreturn)
+[[noreturn]]
+#endif
 void err_cpp(int);
+
 void error_fortran(int*);
 
 #ifdef __cplusplus

test/error/CMakeLists.txt

@@ -16,13 +16,18 @@ add_test(NAME C++_Fortran_error
 COMMAND ${CMAKE_COMMAND} -Dexe=$<TARGET_FILE:cxx_fortran_error> -Dexp_code=42 -P ${PROJECT_SOURCE_DIR}/cmake/test_error.cmake
 )
 
-add_executable(fortran_cxx_error error_cpp.f90 ${PROJECT_SOURCE_DIR}/src/error/lib.cpp)
-set_property(TARGET fortran_cxx_error PROPERTY LINKER_LANGUAGE Fortran)
+#object library for Visual Studio
+add_library(cpp_err OBJECT ${PROJECT_SOURCE_DIR}/src/error/lib.cpp)
+add_executable(fortran_cxx_error error_cpp.f90 $<TARGET_OBJECTS:cpp_err>)
+if(NOT CMAKE_GENERATOR MATCHES "Visual Studio")
+  set_property(TARGET fortran_cxx_error PROPERTY LINKER_LANGUAGE Fortran)
+endif()
 add_test(NAME Fortran_C++_error
 COMMAND ${CMAKE_COMMAND} -Dexe=$<TARGET_FILE:fortran_cxx_error> -Dexp_code=42 -P ${PROJECT_SOURCE_DIR}/cmake/test_error.cmake
 )
 
-add_executable(fortran_c_error error_c.f90 ${PROJECT_SOURCE_DIR}/src/error/lib.c)
+add_library(c_err OBJECT ${PROJECT_SOURCE_DIR}/src/error/lib.c)
+add_executable(fortran_c_error error_c.f90 $<TARGET_OBJECTS:c_err>)
 add_test(NAME Fortran_C_error
 COMMAND ${CMAKE_COMMAND} -Dexe=$<TARGET_FILE:fortran_c_error> -Dexp_code=42 -P ${PROJECT_SOURCE_DIR}/cmake/test_error.cmake
 )