CMake/Modules/CMakeCCompilerId.c.in
Brad King 7f401ae43f Features: Detect C default dialect on MSVC-like compilers
These compilers default to C 90 but do not define __STDC__.  While MSVC
itself has no option to change the dialect, compilers that document
compatibility with MSVC and define _MSC_VER may (e.g. Intel).
2016-04-28 09:08:35 -04:00

84 lines
2.0 KiB
C

#ifdef __cplusplus
# error "A C++ compiler has been selected for C."
#endif
#if defined(__18CXX)
# define ID_VOID_MAIN
#endif
#if defined(__CLASSIC_C__)
/* cv-qualifiers did not exist in K&R C */
# define const
# define volatile
#endif
@CMAKE_C_COMPILER_ID_CONTENT@
/* Construct the string literal in pieces to prevent the source from
getting matched. Store it in a pointer rather than an array
because some compilers will just produce instructions to fill the
array rather than assigning a pointer to a static array. */
char const* info_compiler = "INFO" ":" "compiler[" COMPILER_ID "]";
#ifdef SIMULATE_ID
char const* info_simulate = "INFO" ":" "simulate[" SIMULATE_ID "]";
#endif
#ifdef __QNXNTO__
char const* qnxnto = "INFO" ":" "qnxnto[]";
#endif
#if defined(__CRAYXE) || defined(__CRAYXC)
char const *info_cray = "INFO" ":" "compiler_wrapper[CrayPrgEnv]";
#endif
@CMAKE_C_COMPILER_ID_PLATFORM_CONTENT@
@CMAKE_C_COMPILER_ID_ERROR_FOR_TEST@
#if !defined(__STDC__)
# if defined(_MSC_VER) && !defined(__clang__)
# define C_DIALECT "90"
# else
# define C_DIALECT
# endif
#elif __STDC_VERSION__ >= 201000L
# define C_DIALECT "11"
#elif __STDC_VERSION__ >= 199901L
# define C_DIALECT "99"
#else
# define C_DIALECT "90"
#endif
const char* info_language_dialect_default =
"INFO" ":" "dialect_default[" C_DIALECT "]";
/*--------------------------------------------------------------------------*/
#ifdef ID_VOID_MAIN
void main() {}
#else
# if defined(__CLASSIC_C__)
int main(argc, argv) int argc; char *argv[];
# else
int main(int argc, char* argv[])
# endif
{
int require = 0;
require += info_compiler[argc];
require += info_platform[argc];
require += info_arch[argc];
#ifdef COMPILER_VERSION_MAJOR
require += info_version[argc];
#endif
#ifdef SIMULATE_ID
require += info_simulate[argc];
#endif
#ifdef SIMULATE_VERSION_MAJOR
require += info_simulate_version[argc];
#endif
#if defined(__CRAYXE) || defined(__CRAYXC)
require += info_cray[argc];
#endif
require += info_language_dialect_default[argc];
(void)argv;
return require;
}
#endif