Pre-defined C / C++ Compiler Macros

멀티 플랫폼개발이나 , 컴파일러, 중요 라이브러리들을 점검하고자 할때

위와 같은 미리 정의된 매크로들을 사용한다.

아래의 링크에 잘 정리되어 있다. 

http://predef.sourceforge.net/

아래는 GNU C / C++ 의 버전을 체크하는 부분.

GNU C/C++

Type	Macro	Description
Identification	__GNUC__	.
Version	__GNUC__	Version
Version	__GNUC_MINOR__	Revision
Version	__GNUC_PATCHLEVEL__	Patch (introduced in version 3.0)

Please note that the meaning of the __GNUC__ macro has changed subtly over the years, from identifying the GNU C/C++ compiler to identifying any compiler that implements the GNU compiler extensions (see the Feature request - a macro defined for GCC discussion for further information). For example, the Intel C++ on Linux also defines these macros from version 8.1 (see the Intel C++ Compiler 8.1 for Linux Release Notes and Intel Compilers for Linux: Compatibility with GNU Compilers.)

Example

GNU C/C++	__GNUC__	__GNUC_MINOR__	__GNUC_PATCHLEVEL__
2.7.x	2	7	.
3.0.2	3	0	2

Alternative Version

If you prefer a single version macro, you can define the following yourself.

#if defined(__GNUC__)
# if defined(__GNUC_PATCHLEVEL__)
#  define __GNUC_VERSION__ (__GNUC__ * 10000 \
                            + __GNUC_MINOR__ * 100 \
                            + __GNUC_PATCHLEVEL__)
# else
#  define __GNUC_VERSION__ (__GNUC__ * 10000 \
                            + __GNUC_MINOR__ * 100)
# endif
#endif

The format of this new macro is:

Type	Macro	Format	Description
Version	__GNUC_VERSION__	VVRRPP	VV = Version RR = Revision PP = Patch

Example of Alternative Version

GNU C/C++	__GNUC_VERSION__
2.7.x	20700
3.0.2	30002

Visual C++ Version ( _MSC_VER )

Visual C++ Version	_MSC_VER value
9.0	1500
8.0	1400
7.1	1310
7.0	1300
6.0	1200
5.0	1100