It appears that in order for a precompiled header (.h.gch) to be used, it has to reside in the same directory as the source header (.h) that it was created from. This is somewhat cumbersome for builds that have object files placed in a separate directory tree (as is the case with autoconf, etc). Given, however, that this is the behavior, here is my problem. I would like to compile my libraries twice, once with -g and once without. The object files from each build would be placed in a separate build directories. But what happens to precompiled headers, which would reside in the source tree, next to their .h file? Does a .h.gch file need to be recompiled dependending on whether -g/-O are used?
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