6c8338f92c
This fixes incremental build of OpenSSH after the recent upgrade. For example, in secure/lib/libssh, -include ssh_namespace.h is used on all files. This is not tracked in the .depend file though due to MKDEP_CFLAGS not including it. The ssh example was broken in r291941 when not using FAST_DEPEND due to the .depend bug. FAST_DEPEND was not affected by this because it generates dependencies at compile time and thus sees the -include. This ugly make syntax could be simpler for bmake by using :tW but fmake-compatible syntax is used since this needs to be MFC'd all the way to stable/9. Also add a temporary hack to workaround existing checkouts building incrementally with a .depend file not having these headers. MFC after: 1 week Sponsored by: EMC / Isilon Storage Division
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