Add thread-safety to libc, so that libc_r will build (on i386 at least).

All POSIX libc api now there (to P1003.1c/D10)
  (more md stuff is needed for other libc/arch/*)
  (setlogin is no longer a special syscall)
Add -pthread option to gcc (that makes it use -lc_r and -D_POSIX_THREADS).
Doc some re-entrant routines
Add libc_r to intro(3)
dig() uses some libc srcs and an extra -I was needed there.
Add more md stuff to libc_r.
Update includes for the pthreads api
Update libc_r TODO

1 files changed, 8 insertions, 1 deletions

diff --git a/share/man/man3/intro.3 b/share/man/man3/intro.3
index 0da783993ce..538762eec78 100644
--- a/share/man/man3/intro.3
+++ b/share/man/man3/intro.3
@@ -77,6 +77,12 @@ string operators,
 character tests and character operators,
 des encryption routines,
 storage allocation, time functions, signal handling and more.
+.It Xr libc_r Pq Fl l Ns Ar c_r
+Reentrant C library. Contains POSIX 1003.1c
+.Xr pthreads 3
+API, thread scheduler, and thread-safe variants of all functions
+found in
+.Xr libc .
 .It Xo
 .Xr libcurses
 .Pf ( Fl l Ns Ar curses
@@ -149,7 +155,8 @@ the math library compiled for profiling
 .Xr intro 2 ,
 .Xr cc 1 ,
 .Xr ld 1 ,
-.Xr nm 1
+.Xr nm 1 ,
+.Xr pthreads 3
 .\" .Sh LIST OF FUNCTIONS
 .\" .Bl -column "strncasecmpxxx" "system"
 .\" .Sy Name	Description