Category
Pragma equivalent
#pragma options [no]stdinc
Purpose
Specifies whether the standard include directories are included in the search paths for system and user header files.
When -qstdinc is
in effect, the compiler searches the following directories for header
files:
- The directory specified in the configuration file for the XL C header files (this is normally /opt/IBM/xlc/13.1.0/include/) or by the -qc_stdinc option
- The directory specified in the configuration file for the system header files (this is normally /usr/include/), or by the -qc_stdinc option.
When -qnostdinc is in effect, these directories
are excluded from the search paths. The only directories to be searched
are:
- directories in which source files containing #include "filename" directives are located
- directories specified by the -I option
- directories specified by the -qinclude option
Defaults
-qstdinc
Usage
The search order of header files is described in Directory search sequence for include files.
This option only affects search paths for header files included with a relative name; if a full (absolute) path name is specified, this option has no effect on that path name.
The last valid pragma directive remains in effect until replaced by a subsequent pragma.
Predefined macros
None.
Examples
To compile myprogram.c so
that only the directory /tmp/myfiles (in
addition to the directory containing myprogram.c)
is searched for the file included with the #include “myinc.h” directive,
enter:
xlc myprogram.c -qnostdinc -I/tmp/myfiles