diff options
Diffstat (limited to 'gcc/cpp.texi')
| -rw-r--r-- | gcc/cpp.texi | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/cpp.texi b/gcc/cpp.texi index b8961db8cde..9424b48f985 100644 --- a/gcc/cpp.texi +++ b/gcc/cpp.texi @@ -881,6 +881,14 @@ This macro expands to the constant 1, to signify that this is ANSI Standard C@. (Whether that is actually true depends on what C compiler will operate on the output from the preprocessor.) +On some hosts, system include files use a different convention, where +@samp{__STDC__} is normally 0, but is 1 if the user specifies strict +conformance to the C Standard. The preprocessor follows the host convention +when processing system include files, but when processing user files it follows +the usual GNU C convention. + +This macro is not defined if the @samp{-traditional} option is used. + @item __STDC_VERSION__ @findex __STDC_VERSION__ This macro expands to the C Standard's version number, @@ -891,6 +899,8 @@ Like @samp{__STDC__}, whether this version number is accurate for the entire implementation depends on what C compiler will operate on the output from the preprocessor. +This macro is not defined if the @samp{-traditional} option is used. + @item __GNUC__ @findex __GNUC__ This macro is defined if and only if this is GNU C@. This macro is @@ -2679,6 +2689,15 @@ Do not search for header files in the C++-specific standard directories, but do still search the other standard directories. (This option is used when building libg++.) +@item -remap +@findex -remap +When searching for a header file in a directory, remap file names if a +file named @file{header.gcc} exists in that directory. This can be used +to work around limitations of file systems with file name restrictions. +The @file{header.gcc} file should contain a series of lines with two +tokens on each line: the first token is the name to map, and the second +token is the actual name to use. + @item -D @var{name} @findex -D Predefine @var{name} as a macro, with definition @samp{1}. @@ -2733,6 +2752,10 @@ predefined macros, and it outputs @emph{both} the @samp{#define} directives and the result of preprocessing. Both kinds of output go to the standard output file. +@item -dI +@findex -dI +Output @samp{#include} directives in addition to the result of preprocessing. + @item -M [-MG] @findex -M Instead of outputting the result of preprocessing, output a rule |