classes.cpp: Define _XOPEN_SOURCE for isascii()

[libsigrok.git] / bindings / cxx / classes.cpp

diff --git a/bindings/cxx/classes.cpp b/bindings/cxx/classes.cpp
index 324da04270cdc586278fb6650065e0535add21db..61fb0f7d5e46948c5cbb4574cff9176881884350 100644 (file)
--- a/bindings/cxx/classes.cpp
+++ b/bindings/cxx/classes.cpp
@@ -17,6 +17,11 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+/* Needed for isascii(), as used in the GNU libstdc++ headers */
+#ifndef _XOPEN_SOURCE
+#define _XOPEN_SOURCE 600
+#endif
+
 #include <config.h>
 #include <libsigrokcxx/libsigrokcxx.hpp>