[project @ 2001-08-14 13:40:07 by sewardj]
Change the story about POSIX headers in C compilation. Until now, all C code in the RTS and library cbits has by default been compiled with settings for POSIXness enabled, that is: #define _POSIX_SOURCE 1 #define _POSIX_C_SOURCE 199309L #define _ISOC9X_SOURCE If you wanted to negate this, you'd have to define NON_POSIX_SOURCE before including headers. This scheme has some bad effects: * It means that ccall-unfoldings exported via interfaces from a module compiled with -DNON_POSIX_SOURCE may not compile when imported into a module which does not -DNON_POSIX_SOURCE. * It overlaps with the feature tests we do with autoconf. * It seems to have caused borkage in the Solaris builds for some considerable period of time. The New Way is: * The default changes to not-being-in-Posix mode. * If you want to force a C file into Posix mode, #include as the **first** include the new file ghc/includes/PosixSource.h. Most of the RTS C sources have this include now. * NON_POSIX_SOURCE is almost totally expunged. Unfortunately we have to retain some vestiges of it in ghc/compiler so that modules compiled via C on Solaris using older compilers don't break.
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