Merge from gnulib, fixing some 'configure' typos (Bug#9696).

* lib/signal.in.h, lib/sigprocmask.c, m4/gl-comp.m4:
* m4/gnulib-common.m4: Merge from gnulib.
Without this, 'configure' would say "func_gl_gnulib_m4code_pathmax:
command not found" on powerpc-apple-darwin9.8.0.

2 files changed, 28 insertions, 20 deletions

diff --git a/m4/gl-comp.m4 b/m4/gl-comp.m4
index 04234bb6ef3..03cedf70af8 100644
--- a/m4/gl-comp.m4
+++ b/m4/gl-comp.m4
@@ -79,9 +79,9 @@ AC_DEFUN([gl_EARLY],
   # Code from module stdarg:
   dnl Some compilers (e.g., AIX 5.3 cc) need to be in c99 mode
   dnl for the builtin va_copy to work.  With Autoconf 2.60 or later,
-  dnl AC_PROG_CC_STDC arranges for this.  With older Autoconf AC_PROG_CC_STDC
+  dnl gl_PROG_CC_C99 arranges for this.  With older Autoconf gl_PROG_CC_C99
   dnl shouldn't hurt, though installers are on their own to set c99 mode.
-  AC_REQUIRE([AC_PROG_CC_STDC])
+  gl_PROG_CC_C99
   # Code from module stdbool:
   # Code from module stddef:
   # Code from module stdint:
@@ -246,12 +246,6 @@ if test $HAVE_POSIX_SIGNALBLOCKING = 0; then
 fi
 gl_SIGNAL_MODULE_INDICATOR([sigprocmask])
       gl_gnulib_enabled_sigprocmask=true
-      if $condition; then
-        func_gl_gnulib_m4code_raise
-      fi
-      if $condition; then
-        func_gl_gnulib_m4code_f691f076f650964c9f5598c3ee487616
-      fi
     fi
   }
   func_gl_gnulib_m4code_stat ()
@@ -264,13 +258,10 @@ if test $REPLACE_STAT = 1; then
 fi
 gl_SYS_STAT_MODULE_INDICATOR([stat])
       gl_gnulib_enabled_stat=true
-      if $condition; then
+      if test $REPLACE_STAT = 1; then
         func_gl_gnulib_m4code_dosname
       fi
-      if $condition; then
-        func_gl_gnulib_m4code_pathmax
-      fi
-      if $condition; then
+      if test $REPLACE_STAT = 1; then
         func_gl_gnulib_m4code_verify
       fi
     fi
@@ -305,12 +296,6 @@ gl_STDLIB_MODULE_INDICATOR([strtoull])
       gl_gnulib_enabled_verify=true
     fi
   }
-  if test $HAVE_DUP2 = 0 || test $REPLACE_DUP2 = 1; then
-    func_gl_gnulib_m4code_f691f076f650964c9f5598c3ee487616
-  fi
-  if test $HAVE_DUP2 = 0 || test $REPLACE_DUP2 = 1; then
-    func_gl_gnulib_m4code_676220fa4366efa9bdbfccf11a857c07
-  fi
   if test $REPLACE_GETOPT = 1; then
     func_gl_gnulib_m4code_be453cec5eecf5731a274f2de7f2db36
   fi
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 8fc448fdc8f..7d832999591 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 30
+# gnulib-common.m4 serial 31
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -211,6 +211,29 @@ m4_ifndef([AS_VAR_IF],
 [m4_define([AS_VAR_IF],
 [AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
 
+# gl_PROG_CC_C99
+# Modifies the value of the shell variable CC in an attempt to make $CC
+# understand ISO C99 source code.
+# This is like AC_PROG_CC_C99, except that
+# - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60,
+# - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
+#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
+#   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
+#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
+# Remaining problems:
+# - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
+#   to CC twice
+#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
+# - AC_PROG_CC_STDC is likely to change when C1X is an ISO standard.
+AC_DEFUN([gl_PROG_CC_C99],
+[
+  dnl Change that version number to the minimum Autoconf version that supports
+  dnl mixing AC_PROG_CC_C99 calls with AC_PROG_CC_STDC calls.
+  m4_version_prereq([9.0],
+    [AC_REQUIRE([AC_PROG_CC_C99])],
+    [AC_REQUIRE([AC_PROG_CC_STDC])])
+])
+
 # gl_PROG_AR_RANLIB
 # Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
 # The user can set the variables AR, ARFLAGS, RANLIB if he wants to override