[cfe-dev] PTH questions

[Robert Purves]

1. What does 'T' in PTH stand for? Tokenized, toasted...?

2. The command  clang test.h  produces the expected file test.h.gch.  
Is this file recognised and used automatically in subsequent  
compilations containing #include "test.h" (as gcc does), or is it  
necessary to add the option -include-pth=test.h.gch?

3. -include-pth hates to have the '=' omitted:
$ clang -c test.c -o test.o -include-pth=test.h.gch
$ clang -c test.c -o test.o -include-pth test.h.gch
clang: warning: test.h.gch: 'linker' input file unused when '-c' is  
present
error: PTH file -o could not be read

Is this inscrutable error a bug, or By Design?

Robert P.