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Diffstat (limited to 'gcc/doc/cpp.texi')
| -rw-r--r-- | gcc/doc/cpp.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/doc/cpp.texi b/gcc/doc/cpp.texi index e6786cf8102..54941a9f3c6 100644 --- a/gcc/doc/cpp.texi +++ b/gcc/doc/cpp.texi @@ -1917,6 +1917,13 @@ underscores. @table @code +@item __COUNTER__ +This macro expands to sequential integral values starting from 0. In +conjuction with the @code{##} operator, this provides a convenient means to +generate unique identifiers. Care must be taken to ensure that +@code{__COUNTER__} is not expanded prior to inclusion of precompiled headers +which use it. Otherwise, the precompiled headers will not be used. + @item __GNUC__ @itemx __GNUC_MINOR__ @itemx __GNUC_PATCHLEVEL__ |