Read INCLUDE vars as well as ROOT

Help update for openssl-sys crate release

1 files changed, 9 insertions, 4 deletions

diff --git a/libssh2-sys/build.rs b/libssh2-sys/build.rs
index dbcffab..904d21d 100644
--- a/libssh2-sys/build.rs
+++ b/libssh2-sys/build.rs
@@ -96,11 +96,16 @@ fn main() {
 }
 
 fn register_dep(dep: &str) {
-    match env::var(&format!("DEP_{}_ROOT", dep)) {
-        Ok(s) => {
-            prepend("PKG_CONFIG_PATH", Path::new(&s).join("lib/pkgconfig"));
+    if let Some(s) = env::var_os(&format!("DEP_{}_ROOT", dep)) {
+        prepend("PKG_CONFIG_PATH", Path::new(&s).join("lib/pkgconfig"));
+        return
+    }
+    if let Some(s) = env::var_os(&format!("DEP_{}_INCLUDE", dep)) {
+        let path = Path::new(&s).join("../lib/pkgconfig");
+        if path.exists() {
+            prepend("PKG_CONFIG_PATH", path);
+            return
         }
-        Err(..) => {}
     }
 }