parse error in cpp when including a file specified by a preprocessing token

[dashea]

For instance, given the following source file:

#ifdef HELLO_H                                                                                                          
#include HELLO_H                                                                                                        
#endif                                                                                                                  
                                                                                                                        
int main(void)                                                                                                          
{                                                                                                                       
    return 0;                                                                                                           
}

And an empty hello.h, running pcc -DHELLO_H=\"hello.h\" hello.c results in:

hello.h:8: error: unterminated conditional
error: /usr/local/libexec/cpp terminated with status 1

In the first run of fastscan() on hello.h, the first call to qcchar() resets to inp to linp, which at that point is set to the line in the original source file after #include HELLO_H, so it ends up processing the #endif in the context of hello.h and bombing out. I apologize that I don't have a fix for this, but hopefully this information helps.

[ragge0]

Interesting bug!
It occurs for #ifdef of something that is a quoted string.
I'll fix it later, I am currently in the process of changing some of the internal logic of cpp and will fix this at the same time.