#pragma C compiler directive

[Bob Sutterfield]

In article <2860 at brazos.Rice.edu> grover at sed170.hac.com (Dean Grover) writes:
|   While looking in /usr/include/vfork.h under SunOS 4.0.3, I noticed
|   the following line:
|
|	   #pragma unknown_control_flow(vfork)
|
|   I can guess what that means to the C compiler, but my question is,
|   where is the #pragma compiler directive documented ?  I haven't
|   been able to find it anywhere.

It's an ANSIism.  See K&R II, appendix A 12.8, concerning the
preprocessor.

   Also, besides "unknown_control_flow", what other options exist ?

It's implementation-dependent.  Ask your compiler author.  Oddly enough,
#pragma isn't in the SunOS 4.0.3 cc(1), cpp(1), or m4(1V) pages, nor in
the hardcopy _C_Programmer's_Guide_.