pulseview: fix build

srcpkgs/pulseview/patches/template-c-linkage.patch

@@ -0,0 +1,28 @@
+Index: pulseview-0.4.2/pv/data/decode/annotation.cpp
+===================================================================
+--- pulseview-0.4.2.orig/pv/data/decode/annotation.cpp
++++ pulseview-0.4.2/pv/data/decode/annotation.cpp
+@@ -17,9 +17,7 @@
+  * along with this program; if not, see <http://www.gnu.org/licenses/>.
+  */
+ 
+-extern "C" {
+ #include <libsigrokdecode/libsigrokdecode.h>
+-}
+ 
+ #include <cassert>
+ #include <vector>
+Index: pulseview-0.4.2/pv/views/trace/decodetrace.cpp
+===================================================================
+--- pulseview-0.4.2.orig/pv/views/trace/decodetrace.cpp
++++ pulseview-0.4.2/pv/views/trace/decodetrace.cpp
+@@ -17,9 +17,7 @@
+  * along with this program; if not, see <http://www.gnu.org/licenses/>.
+  */
+ 
+-extern "C" {
+ #include <libsigrokdecode/libsigrokdecode.h>
+-}
+ 
+ #include <limits>
+ #include <mutex>