updated gnulib

8 files changed, 30 insertions, 21 deletions

diff --git a/gl/m4/extensions.m4 b/gl/m4/extensions.m4
index 07ba376c0e..e30f12206c 100644
--- a/gl/m4/extensions.m4
+++ b/gl/m4/extensions.m4
@@ -6,7 +6,7 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from CVS
+# This definition of AC_USE_SYSTEM_EXTENSIONS is stolen from git
 # Autoconf.  Perhaps we can remove this once we can assume Autoconf
 # 2.70 or later everywhere, but since Autoconf mutates rapidly
 # enough in this area it's likely we'll need to redefine
diff --git a/gl/m4/extern-inline.m4 b/gl/m4/extern-inline.m4
index 94b46dde07..c4c5e7f221 100644
--- a/gl/m4/extern-inline.m4
+++ b/gl/m4/extern-inline.m4
@@ -8,15 +8,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_EXTERN_INLINE],
 [
   AH_VERBATIM([extern_inline],
-[/* _GL_INLINE is a portable alternative to ISO C99 plain 'inline'.
-   _GL_EXTERN_INLINE is a portable alternative to 'extern inline'.
-   _GL_INLINE_HEADER_BEGIN contains useful stuff to put
-     in an include file, before uses of _GL_INLINE.
-     It suppresses GCC's bogus "no previous prototype for 'FOO'" diagnostic,
-     when FOO is an inline function in the header; see
-     <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.
-   _GL_INLINE_HEADER_END contains useful stuff to put
-     in the same include file, after uses of _GL_INLINE.
+[/* Please see the Gnulib manual for how to use these macros.
 
    Suppress extern inline with HP-UX cc, as it appears to be broken; see
    <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
@@ -39,7 +31,8 @@ AC_DEFUN([gl_EXTERN_INLINE],
      && !defined __APPLE__)
 # define _GL_INLINE inline
 # define _GL_EXTERN_INLINE extern inline
-#elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __APPLE__
+#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \
+       && !defined __APPLE__)
 # if __GNUC_GNU_INLINE__
    /* __gnu_inline__ suppresses a GCC 4.2 diagnostic.  */
 #  define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
@@ -59,6 +52,10 @@ AC_DEFUN([gl_EXTERN_INLINE],
 #  define _GL_INLINE_HEADER_CONST_PRAGMA \
      _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
 # endif
+  /* Suppress GCC's bogus "no previous prototype for 'FOO'"
+     and "no previous declaration for 'FOO'"  diagnostics,
+     when FOO is an inline function in the header; see
+     <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.  */
 # define _GL_INLINE_HEADER_BEGIN \
     _Pragma ("GCC diagnostic push") \
     _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
diff --git a/gl/m4/fseeko.m4 b/gl/m4/fseeko.m4
index e0f2dfbe1f..ca9da2835d 100644
--- a/gl/m4/fseeko.m4
+++ b/gl/m4/fseeko.m4
@@ -1,4 +1,4 @@
-# fseeko.m4 serial 16
+# fseeko.m4 serial 17
 dnl Copyright (C) 2007-2013 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -37,7 +37,7 @@ AC_DEFUN([gl_FUNC_FSEEKO],
     fi
     m4_ifdef([gl_FUNC_FFLUSH_STDIN], [
       gl_FUNC_FFLUSH_STDIN
-      if test $gl_cv_func_fflush_stdin = no; then
+      if test $gl_cv_func_fflush_stdin != yes; then
         REPLACE_FSEEKO=1
       fi
     ])
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index 24ed4b30d1..a1ec16c9f2 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -989,6 +989,7 @@ changequote([, ])dnl
   gl_LOCALENAME
   AC_CHECK_FUNCS_ONCE([newlocale])
   gl_LOCK
+  gl_MODULE_INDICATOR([lock])
   gl_FUNC_LSTAT
   if test $REPLACE_LSTAT = 1; then
     AC_LIBOBJ([lstat])
diff --git a/gl/m4/lock.m4 b/gl/m4/lock.m4
index d3fc1eff01..aae1701a0a 100644
--- a/gl/m4/lock.m4
+++ b/gl/m4/lock.m4
@@ -24,6 +24,9 @@ AC_DEFUN([gl_LOCK],
         [[
 #if __FreeBSD__ == 4
 error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
+#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \
+       && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070)
+error "No, in Mac OS X < 10.7 recursive mutexes actually don't work."
 #else
 int x = (int)PTHREAD_MUTEX_RECURSIVE;
 return !x;
diff --git a/gl/m4/manywarnings.m4 b/gl/m4/manywarnings.m4
index 45a30afda7..be6d4c91c5 100644
--- a/gl/m4/manywarnings.m4
+++ b/gl/m4/manywarnings.m4
@@ -98,6 +98,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -W \
     -Wabi \
     -Waddress \
+    -Waggressive-loop-optimizations \
     -Wall \
     -Warray-bounds \
     -Wattributes \
@@ -125,7 +126,6 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wformat-security \
     -Wformat-y2k \
     -Wformat-zero-length \
-    -Wformat=2 \
     -Wfree-nonheap-object \
     -Wignored-qualifiers \
     -Wimplicit \
@@ -143,9 +143,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wmissing-braces \
     -Wmissing-declarations \
     -Wmissing-field-initializers \
-    -Wmissing-format-attribute \
     -Wmissing-include-dirs \
-    -Wmissing-noreturn \
     -Wmissing-parameter-type \
     -Wmissing-prototypes \
     -Wmudflap \
@@ -166,6 +164,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wpointer-sign \
     -Wpointer-to-int-cast \
     -Wpragmas \
+    -Wreturn-local-addr \
     -Wreturn-type \
     -Wsequence-point \
     -Wshadow \
@@ -187,7 +186,6 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wtype-limits \
     -Wuninitialized \
     -Wunknown-pragmas \
-    -Wunreachable-code \
     -Wunsafe-loop-optimizations \
     -Wunused \
     -Wunused-but-set-parameter \
diff --git a/gl/m4/stdalign.m4 b/gl/m4/stdalign.m4
index a866ff670b..20be01aaf2 100644
--- a/gl/m4/stdalign.m4
+++ b/gl/m4/stdalign.m4
@@ -31,7 +31,8 @@ AC_DEFUN([gl_STDALIGN_H],
 
             /* Test _Alignas only on platforms where gnulib can help.  */
             #if \
-                (__GNUC__ || __IBMC__ || __IBMCPP__ \
+                ((defined __cplusplus && 201103 <= __cplusplus) \
+                 || __GNUC__ || __IBMC__ || __IBMCPP__ || __ICC \
                  || 0x5110 <= __SUNPRO_C || 1300 <= _MSC_VER)
               struct alignas_test { char c; char alignas (8) alignas_8; };
               char test_alignas[offsetof (struct alignas_test, alignas_8) == 8
diff --git a/gl/m4/warnings.m4 b/gl/m4/warnings.m4
index 4b2ac38501..184873283b 100644
--- a/gl/m4/warnings.m4
+++ b/gl/m4/warnings.m4
@@ -1,4 +1,4 @@
-# warnings.m4 serial 7
+# warnings.m4 serial 8
 dnl Copyright (C) 2008-2013 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -27,7 +27,7 @@ AC_DEFUN([gl_COMPILER_OPTION_IF],
 AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
 AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [
   gl_save_compiler_FLAGS="$gl_Flags"
-  gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $1"])
+  gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $gl_unknown_warnings_are_errors $1"])
   AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])],
                     [AS_VAR_SET(gl_Warn, [yes])],
                     [AS_VAR_SET(gl_Warn, [no])])
@@ -38,6 +38,14 @@ AS_VAR_POPDEF([gl_Flags])dnl
 AS_VAR_POPDEF([gl_Warn])dnl
 ])
 
+# gl_UNKNOWN_WARNINGS_ARE_ERRORS
+# ------------------------------
+# Clang doesn't complain about unknown warning options unless one also
+# specifies -Wunknown-warning-option -Werror.  Detect this.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS],
+[gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
+   [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],
+   [gl_unknown_warnings_are_errors=])])
 
 # gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS],
 #             [PROGRAM = AC_LANG_PROGRAM()])
@@ -47,7 +55,8 @@ AS_VAR_POPDEF([gl_Warn])dnl
 #
 # If VARIABLE is a variable name, AC_SUBST it.
 AC_DEFUN([gl_WARN_ADD],
-[gl_COMPILER_OPTION_IF([$1],
+[AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])
+gl_COMPILER_OPTION_IF([$1],
   [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])],
   [],
   [$3])