Remove POSIX_SIGNALS.

* s/usg5-4.h (POSIX_SIGNALS):
* s/netbsd.h (POSIX_SIGNALS):
* s/msdos.h (POSIX_SIGNALS):
* s/ms-w32.h (POSIX_SIGNALS):
* s/hpux11.h (POSIX_SIGNALS):
* s/gnu.h (POSIX_SIGNALS):
* s/gnu-linux.h (POSIX_SIGNALS):
* s/freebsd.h (POSIX_SIGNALS):
* s/darwin.h (POSIX_SIGNALS):
* s/cygwin.h (POSIX_SIGNALS):
* s/aix4-2.h (POSIX_SIGNALS): Remove definition.
* s/unixware.h:
* s/sol2-6.h: Remove comments on POSIX_SIGNALS.
* process.c (create_process):
* syssignal.h:
* sysdep.c (wait_for_termination, init_signals):
* process.c (create_process):
* msdos.c: POSIX_SIGNALS is always defined on all platforms,
remove all code that assumes the contrary.

13 files changed, 4 insertions, 37 deletions

diff --git a/src/s/aix4-2.h b/src/s/aix4-2.h
index b7de0312f7b..0a36c8ff0df 100644
--- a/src/s/aix4-2.h
+++ b/src/s/aix4-2.h
@@ -126,7 +126,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define CLASH_DETECTION
 
 /* Perry Smith <pedz@ddivt1.austin.ibm.com> says these are correct.  */
-#define POSIX_SIGNALS
 #undef sigmask
 
 #ifndef HAVE_LIBXMU
diff --git a/src/s/cygwin.h b/src/s/cygwin.h
index b2ade390c7e..a337f156914 100644
--- a/src/s/cygwin.h
+++ b/src/s/cygwin.h
@@ -104,7 +104,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 #define SYSV_SYSTEM_DIR 1
 #define UNEXEC unexcw.o
-#define POSIX_SIGNALS 1
 #define LINKER $(CC)
 
 /* Use terminfo instead of termcap.  Fewer environment variables to
diff --git a/src/s/darwin.h b/src/s/darwin.h
index de8369ddae2..6743b65cce6 100644
--- a/src/s/darwin.h
+++ b/src/s/darwin.h
@@ -215,10 +215,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
    ioctl TIOCSCTTY.  */
 #define DONT_REOPEN_PTY
 
-/* This makes create_process in process.c save and restore signal
-   handlers correctly.  Suggested by Nozomu Ando.*/
-#define POSIX_SIGNALS
-
 /* Use the GC_MAKE_GCPROS_NOOPS (see lisp.h) method for marking the
    stack.  */
 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
diff --git a/src/s/freebsd.h b/src/s/freebsd.h
index 6c4da8f0863..178eeffb1c3 100644
--- a/src/s/freebsd.h
+++ b/src/s/freebsd.h
@@ -101,10 +101,5 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define USE_MMAP_FOR_BUFFERS    1
 
-/* Use sigprocmask(2) and friends instead of sigblock(2); the man page
-   of sigblock says it is obsolete.  */
-
-#define POSIX_SIGNALS           1
-
 /* arch-tag: 426529ca-b7c4-448f-b10a-d4dcdc9c78eb
    (do not change this comment) */
diff --git a/src/s/gnu-linux.h b/src/s/gnu-linux.h
index 73241f0c21f..218af42bac4 100644
--- a/src/s/gnu-linux.h
+++ b/src/s/gnu-linux.h
@@ -187,7 +187,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define SYSV_SYSTEM_DIR       /* use dirent.h */
 
 #define POSIX                 /* affects getpagesize.h and systty.h */
-#define POSIX_SIGNALS
 
 #undef LIB_GCC
 #define LIB_GCC
diff --git a/src/s/gnu.h b/src/s/gnu.h
index 13679a1db4e..946eaa6512b 100644
--- a/src/s/gnu.h
+++ b/src/s/gnu.h
@@ -28,8 +28,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define SIGNALS_VIA_CHARACTERS
 
-#define POSIX_SIGNALS
-
 /* Tell Emacs that we are a terminfo based system; disable the use
    of local termcap.  (GNU uses ncurses.) */
 #ifdef HAVE_LIBNCURSES
diff --git a/src/s/hpux11.h b/src/s/hpux11.h
index 3382395a90f..48f60841047 100644
--- a/src/s/hpux11.h
+++ b/src/s/hpux11.h
@@ -1,10 +1,5 @@
 #include "hpux10-20.h"
 
-#ifdef POSIX_SIGNALS
-#undef POSIX_SIGNALS
-#endif
-#define POSIX_SIGNALS 1
-
 /* SA_RESTART resets the timeout of `select', so don't use it.  */
 #define BROKEN_SA_RESTART
 
diff --git a/src/s/ms-w32.h b/src/s/ms-w32.h
index 74e91c1e816..deb23322d9b 100644
--- a/src/s/ms-w32.h
+++ b/src/s/ms-w32.h
@@ -123,8 +123,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 
-/* Do we have POSIX signals?  (We don't, but we don't care, either.)  */
-#define POSIX_SIGNALS  1
 #include <sys/types.h>
 struct sigaction {
   int sa_flags;
diff --git a/src/s/msdos.h b/src/s/msdos.h
index bcef83ba03e..8cd9bfc8491 100644
--- a/src/s/msdos.h
+++ b/src/s/msdos.h
@@ -128,9 +128,6 @@ You lose; /* Emacs for DOS must be compiled with DJGPP */
 /* Mode line description of a buffer's type.  */
 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 
-/* Do we have POSIX signals?  */
-#define POSIX_SIGNALS
-
 /* We have (the code to control) a mouse.  */
 #define HAVE_MOUSE
 
diff --git a/src/s/netbsd.h b/src/s/netbsd.h
index 2e48c3580d3..147b2d1ad32 100644
--- a/src/s/netbsd.h
+++ b/src/s/netbsd.h
@@ -80,10 +80,5 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define GC_MARK_STACK   GC_MAKE_GCPROS_NOOPS
 
-/* Use sigprocmask and friends instead of sigblock;
-   sigblock is considered obsolete on NetBSD.  */
-
-#define POSIX_SIGNALS   1
-
 /* arch-tag: e80f364a-04e9-4faf-93cb-f36a0fe95c81
    (do not change this comment) */
diff --git a/src/s/sol2-6.h b/src/s/sol2-6.h
index 5ca5cfbc0d0..c05387d47f4 100644
--- a/src/s/sol2-6.h
+++ b/src/s/sol2-6.h
@@ -49,8 +49,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #endif
 
 /* This is the same definition as in usg5-4.h, but with sigblock/sigunblock
-   rather than sighold/sigrelse, which appear to be BSD4.1 specific and won't
-   work if POSIX_SIGNALS is defined.  It may also be appropriate for SVR4.x
+   rather than sighold/sigrelse, which appear to be BSD4.1 specific.
+   It may also be appropriate for SVR4.x
    (x<2) but I'm not sure.   fnf@cygnus.com */
 /* This sets the name of the slave side of the PTY.  On SysVr4,
    grantpt(3) forks a subprocess, so keep sigchld_handler() from
diff --git a/src/s/unixware.h b/src/s/unixware.h
index d1e8748d913..6e42a0d4c56 100644
--- a/src/s/unixware.h
+++ b/src/s/unixware.h
@@ -32,8 +32,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define LIBS_SYSTEM -lsocket -lnsl -lelf -lgen
 
 /* This is the same definition as in usg5-4.h, but with sigblock/sigunblock
-   rather than sighold/sigrelse, which appear to be BSD4.1 specific and won't
-   work if POSIX_SIGNALS is defined.  It may also be appropriate for SVR4.x
+   rather than sighold/sigrelse, which appear to be BSD4.1 specific.
+   It may also be appropriate for SVR4.x
    (x<2) but I'm not sure.   fnf@cygnus.com */
 /* This sets the name of the slave side of the PTY.  On SysVr4,
    grantpt(3) forks a subprocess, so keep sigchld_handler() from
diff --git a/src/s/usg5-4.h b/src/s/usg5-4.h
index b02caf9a3da..8907781294f 100644
--- a/src/s/usg5-4.h
+++ b/src/s/usg5-4.h
@@ -61,10 +61,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define LDAV_SYMBOL "avenrun"
 
-/* Special hacks needed to make Emacs run on this system.  */
-
-#define POSIX_SIGNALS
-
 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
    but they will run slower.  */