fix: Define _BSD_SOURCE to permit unistd functions like readlink.

pravic · pravic · commit 229a7665a5d4 · 2018-04-20T15:03:01.000+03:00
https://linux.die.net/man/2/readlink https://stackoverflow.com/a/29201732 fixes sciter-sdk#131
diff --git a/sciter.go b/sciter.go
@@ -5,7 +5,7 @@
 package sciter
 
 /*
-#cgo CFLAGS: -g -std=c11 -Iinclude -DPLAIN_API_ONLY
+#cgo CFLAGS: -g -std=c11 -Iinclude -DPLAIN_API_ONLY -D_BSD_SOURCE -D_DEFAULT_SOURCE
 #cgo linux LDFLAGS: -ldl
 #cgo linux pkg-config: gtk+-3.0
 
