Don't substitute sigprocmask for pthread_sigmask.

sigprocmask isn't portable in a multithreaded process.
* configure.ac (gl_THREADLIB): Remove dummy.
Merge from gnulib, incorporating:
2014-05-28 pthread_sigmask, timer-time: use gl_THREADLIB only if needed
* m4/pthread_sigmask.m4, m4/timer_time.m4: Update from gnulib.
* src/Makefile.in (LIB_PTHREAD_SIGMASK): Remove; all uses removed.

Fixes: debbugs:17561

2 files changed, 7 insertions, 4 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 33b8257cc1c..5189712d490 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-05-29  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Don't substitute sigprocmask for pthread_sigmask (Bug#17561).
+        * Makefile.in (LIB_PTHREAD_SIGMASK): Remove; all uses removed.
+
 2014-05-29  Eli Zaretskii  <eliz@gnu.org>
 
         * buffer.c (init_buffer): Accept an argument 'initialized'.
diff --git a/src/Makefile.in b/src/Makefile.in
index 0f4130b4dac..d90e9e0eef3 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -125,7 +125,7 @@ LIBS_SYSTEM=@LIBS_SYSTEM@
 ## -lm, or empty.
 LIB_MATH=@LIB_MATH@
 
-## -lpthreads, or empty.
+## -lpthread, or empty.
 LIB_PTHREAD=@LIB_PTHREAD@
 
 LIBIMAGE=@LIBTIFF@ @LIBJPEG@ @LIBPNG@ @LIBGIF@ @LIBXPM@
@@ -293,8 +293,6 @@ LIBSELINUX_LIBS = @LIBSELINUX_LIBS@
 LIBGNUTLS_LIBS = @LIBGNUTLS_LIBS@
 LIBGNUTLS_CFLAGS = @LIBGNUTLS_CFLAGS@
 
-LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
-
 INTERVALS_H = dispextern.h intervals.h composite.h
 
 GETLOADAVG_LIBS = @GETLOADAVG_LIBS@
@@ -413,7 +411,7 @@ LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(LIBX_BASE) $(LIBIMAGE) \
    $(LIBXML2_LIBS) $(LIBGPM) $(LIBRESOLV) $(LIBS_SYSTEM) \
    $(LIBS_TERMCAP) $(GETLOADAVG_LIBS) $(SETTINGS_LIBS) $(LIBSELINUX_LIBS) \
    $(FREETYPE_LIBS) $(FONTCONFIG_LIBS) $(LIBOTF_LIBS) $(M17N_FLT_LIBS) \
-   $(LIBGNUTLS_LIBS) $(LIB_PTHREAD) $(LIB_PTHREAD_SIGMASK) \
+   $(LIBGNUTLS_LIBS) $(LIB_PTHREAD) \
    $(GFILENOTIFY_LIBS) $(LIB_MATH) $(LIBZ)
 
 all: emacs$(EXEEXT) $(OTHER_FILES)