add force-engine feature for enabling engine module (#151)

* add force-engine feature for enabling engine module * add the feature flag to Cargo.toml
alexcrichton · Jul 25, 2022 · a714062 · a714062
1 parent 021754a
commit a714062
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 2 deletions.
diff --git a/Cargo.toml b/Cargo.toml
@@ -31,6 +31,8 @@ idea = []
 # Enables compilation of SEED, a symmetric key block cypher mostly used in South Korea, but
 # otherwise not widely supported.
 seed = []
+# Forces configuring Engine module support.
+force-engine = []
 
 [workspace]
 members = ['testcrate']

diff --git a/src/lib.rs b/src/lib.rs
@@ -185,10 +185,13 @@ impl Build {
         }
 
         if target.contains("musl") || target.contains("windows") {
-            // This actually fails to compile on musl (it needs linux/version.h
+            // Engine module fails to compile on musl (it needs linux/version.h
             // right now) but we don't actually need this most of the time.
             // API of engine.c ld fail in Windows.
-            configure.arg("no-engine");
+            // Disable engine module unless force-engine feature specified
+            if !cfg!(feature = "force-engine") {
+                configure.arg("no-engine");
+            }
         }
 
         if target.contains("musl") {