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, 10 insertions, 1 deletions

diff --git a/src/lib/libc/stdlib/abort.c b/src/lib/libc/stdlib/abort.c
index 4ea8a2ca4b..4cc6257acb 100644
--- a/src/lib/libc/stdlib/abort.c
+++ b/src/lib/libc/stdlib/abort.c
@@ -32,12 +32,13 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: abort.c,v 1.5 1997/06/22 20:21:25 tholo Exp $";
+static char *rcsid = "$OpenBSD: abort.c,v 1.6 1998/11/20 11:18:49 d Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <signal.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include "thread_private.h"
 
 void (*__cleanup)();
 
@@ -54,7 +55,11 @@ abort()
          * any errors -- X311J doesn't allow abort to return anyway.
          */
         sigdelset(&mask, SIGABRT);
+#ifdef _THREAD_SAFE
+        (void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+#else  _THREAD_SAFE
         (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+#endif _THREAD_SAFE
 
         /*
          * POSIX requires we flush stdio buffers on abort
@@ -71,7 +76,11 @@ abort()
          * it again, only harder.
          */
         (void)signal(SIGABRT, SIG_DFL);
+#ifdef _THREAD_SAFE
+        (void)_thread_sys_sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+#else  _THREAD_SAFE
         (void)sigprocmask(SIG_SETMASK, &mask, (sigset_t *)NULL);
+#endif _THREAD_SAFE
         (void)kill(getpid(), SIGABRT);
         exit(1);
 }