NEWS.stable: log cherry-pick [3180807]->[768eb31] doc/lgpl-2.1.texi

[gnulib.git] / build-aux / link-warning.h

diff --git a/build-aux/link-warning.h b/build-aux/link-warning.h
index 9ff7c17..84708ff 100644 (file)
--- a/build-aux/link-warning.h
+++ b/build-aux/link-warning.h
@@ -1,5 +1,5 @@
 /* A C macro for emitting link time warnings.
-   Copyright (C) 1995, 1997, 2000, 2002-2003, 2007, 2009 Free Software
+   Copyright (C) 1995, 1997, 2000, 2002-2003, 2007, 2009-2011 Free Software
    Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify it
@@ -15,6 +15,10 @@
    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#if @HAVE_FEATURES_H@
+# include <features.h> /* for __GLIBC__, __UCLIBC__ */
+#endif
+
 /* GL_LINK_WARNING("literal string") arranges to emit the literal string as
    a linker warning on most glibc systems.
    We use a linker warning rather than a preprocessor warning, because
@@ -24,7 +28,7 @@
      Testing __GLIBC__ is sufficient for asserting that GNU ld is in use.
      Testing __ELF__ guarantees the ELF object format.
      Testing __GNUC__ is necessary for the compound expression syntax.  */
-# if defined __GLIBC__ && defined __ELF__ && defined __GNUC__
+# if (defined __GLIBC__ || defined __UCLIBC__) && defined __ELF__ && defined __GNUC__
 #  define GL_LINK_WARNING(message) \
      GL_LINK_WARNING1 (__FILE__, __LINE__, message)
 #  define GL_LINK_WARNING1(file, line, message) \
@@ -32,12 +36,12 @@
 #  define GL_LINK_WARNING2(file, line, message) \
      GL_LINK_WARNING3 (file ":" #line ": warning: " message)
 #  define GL_LINK_WARNING3(message) \
-     ({ static const char warning[sizeof (message)]            \
-          __attribute__ ((__unused__,                          \
-                          __section__ (".gnu.warning"),                \
-                          __aligned__ (1)))                    \
-          = message "\n";                                      \
-        (void)0;                                               \
+     ({ static const char warning[sizeof (message)]             \
+          __attribute__ ((__unused__,                           \
+                          __section__ (".gnu.warning"),         \
+                          __aligned__ (1)))                     \
+          = message "\n";                                       \
+        (void)0;                                                \
      })
 # else
 #  define GL_LINK_WARNING(message) ((void) 0)