gentoo-overlay/app-text/dvisvgm/files/dvisvgm-1.0.8-darwin.patch

--- src/Process.cpp
+++ src/Process.cpp
@@ -25,6 +25,7 @@
 #include <fcntl.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include <signal.h>
 #endif
 
 #include <cstdlib>