diff options
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/cpp.texi | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index 40b310b..ea38218 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -1927,16 +1927,16 @@ These macros are defined by all GNU compilers that use the C preprocessor: C, C++, and Objective-C@. Their values are the major version, minor version, and patch level of the compiler, as integer constants. For example, GCC 3.2.1 will define @code{__GNUC__} to 3, -@code{__GNUC_MINOR__} to 2, and @code{__GNUC_PATCHLEVEL__} to 1. They -are defined only when the entire compiler is in use; if you invoke the -preprocessor directly, they are not defined. +@code{__GNUC_MINOR__} to 2, and @code{__GNUC_PATCHLEVEL__} to 1. These +macros are also defined if you invoke the preprocessor directly. @code{__GNUC_PATCHLEVEL__} is new to GCC 3.0; it is also present in the widely-used development snapshots leading up to 3.0 (which identify themselves as GCC 2.96 or 2.97, depending on which snapshot you have). If all you need to know is whether or not your program is being compiled -by GCC, you can simply test @code{__GNUC__}. If you need to write code +by GCC, or a non-GCC compiler that claims to accept the GNU C dialects, +you can simply test @code{__GNUC__}. If you need to write code which depends on a specific version, you must be more careful. Each time the minor version is increased, the patch level is reset to zero; each time the major version is increased (which happens rarely), the |