Hei Chan <structurechart@xxxxxxxxx> writes: > I think that I am getting close: > > cc1plus: warning: /opt/3rdPartyLib/src/A/B.h.gch: not a PCH file > > > B.h.gch is generated by the 3rd party make script. When I ran the make script, it output something like: > g++ -fPIC -O -O3 -DUSING_PCH -D_REENTRANT -I"/usr/local/include/boost" -I"/usr/local/." -I"../src" -I"/opt/xerces-c-3.1.1/src" -c -o A/B.h.gch A/B.cpp > > Not sure whether it used -o instead of -x causing the problem. > > Any suggestion? That is compiling a .cpp file, not a .h file. gcc will not generate a PCH file if you compile a .cpp file, it will generate an object file. If that .cpp file is really a header file with an unusual name, then you can use the -x c++-header option to get gcc to generate a PCH. Ian
