New module 'pt_chown'.

[gnulib.git] / build-aux / warn-on-use.h

diff --git a/build-aux/warn-on-use.h b/build-aux/warn-on-use.h
index 3d93a9e..37b6d29 100644 (file)
--- a/build-aux/warn-on-use.h
+++ b/build-aux/warn-on-use.h
@@ -14,7 +14,7 @@
    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/>.  */
 
    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/>.  */
 

-/* _GL_WARN_ON_USE(function, "literal string") issues a declaration
+/* _GL_WARN_ON_USE (function, "literal string") issues a declaration

    for FUNCTION which will then trigger a compiler warning containing
    the text of "literal string" anywhere that function is called, if
    supported by the compiler.  If the compiler does not support this
    for FUNCTION which will then trigger a compiler warning containing
    the text of "literal string" anywhere that function is called, if
    supported by the compiler.  If the compiler does not support this


@@ -70,6 +70,33 @@ extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
 
 # else /* Unsupported.  */
 #  define _GL_WARN_ON_USE(function, message) \
 
 # else /* Unsupported.  */
 #  define _GL_WARN_ON_USE(function, message) \

-extern int _gl_warn_on_use
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+# endif
+#endif
+
+/* _GL_WARN_ON_USE_CXX (function, rettype, parameters_and_attributes, "string")
+   is like _GL_WARN_ON_USE (function, "string"), except that the function is
+   declared with the given prototype, consisting of return type, parameters,
+   and attributes.
+   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
+   not work in this case.  */
+#ifndef _GL_WARN_ON_USE_CXX
+# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
+#  define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
+extern rettype function parameters_and_attributes \
+     __attribute__ ((__warning__ (msg)))
+# else /* Unsupported.  */
+#  define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
+_GL_WARN_EXTERN_C int _gl_warn_on_use
+# endif
+#endif
+
+/* _GL_WARN_EXTERN_C declaration;
+   performs the declaration with C linkage.  */
+#ifndef _GL_WARN_EXTERN_C
+# if defined __cplusplus
+#  define _GL_WARN_EXTERN_C extern "C"
+# else
+#  define _GL_WARN_EXTERN_C extern

 # endif
 #endif
 # endif
 #endif