Make c_helpers optional

1 files changed, 21 insertions, 9 deletions

diff --git a/openssl/build.rs b/openssl/build.rs
index 640b024c..b07c1b3e 100644
--- a/openssl/build.rs
+++ b/openssl/build.rs
@@ -1,16 +1,28 @@
-extern crate gcc;
+#[cfg(feature = "c_helpers")]
+mod imp {
+    extern crate gcc;
 
-use std::env;
-use std::path::PathBuf;
+    use std::env;
+    use std::path::PathBuf;
 
-fn main() {
-    let mut config = gcc::Config::new();
+    pub fn main() {
+        let mut config = gcc::Config::new();
 
-    if let Some(paths) = env::var_os("DEP_OPENSSL_INCLUDE") {
-        for path in env::split_paths(&paths) {
-            config.include(PathBuf::from(path));
+        if let Some(paths) = env::var_os("DEP_OPENSSL_INCLUDE") {
+            for path in env::split_paths(&paths) {
+                config.include(PathBuf::from(path));
+            }
         }
+
+        config.file("src/c_helpers.c").compile("libc_helpers.a");
     }
+}
 
-    config.file("src/c_helpers.c").compile("libc_helpers.a");
+#[cfg(not(feature = "c_helpers"))]
+mod imp {
+    pub fn main() {}
+}
+
+fn main() {
+    imp::main()
 }