-qstdinc, -qnostdinc (-nostdinc, -nostdinc++)
Category
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/16.1.0/include/)
or by the -isystem
(-qc_stdinc) option
The directory specified
in the configuration file for the XL C and C++ header files (this
is normally /opt/ibm/xlC/16.1.0/include/)
or by the -isystem
(-qcpp_stdinc) option- The directory specified in the configuration file for the system header files or by the -isystem (-qgcc_c_stdinc or -qgcc_cpp_stdinc) option
When -nostdinc++ or -nostdinc (-qnostdinc) is in effect, these directories
are excluded from the search paths. The following directories are
searched:
- Directories in which source files containing #include "filename" directives are located
- Directories specified by the -I option
- Directories specified by the -include (-qinclude) option
Syntax
>>-+- -nostdinc++-+-------------------------------------------->< '- -nostdinc---'
Defaults
-qstdinc
Usage
The search order of header files is described in Directory search sequence for included 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 -nostdinc -I/tmp/myfiles
