Pau Garcia i Quiles wrote:
Apart from every compiler making this different (i. e. different parameters for each compilers), what are the difficulties you see for making this a first-class feature?
It's not the different flags for each compiler that makes it hard. We already do that for other features like building shared libraries. A couple years ago I dove pretty deep into the problem. There are several gotchas but I don't remember them all off the top of my head. IIRC, some of the problems were: - Determining which sources can safely use a PCH - Sharing PCH files across targets (esp. in VS) - Avoiding need for cooperation with content in sources - Dependencies - Relationship of .pch and .obj build rules varies It is tricky to come up with a simple interface that is implementable on all platforms. Nothing is a showstopper, but no one has taken the time to take it all the way (VS, GCC, Xcode, Intel CC, HP, Sun, SGI). -Brad _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
