Reverse order of MAKEFLAGS priority (#152)

Signed-off-by: Jakub Beránek <[email protected]>

Author: Kobzol

jemalloc-sys/build.rs

@@ -372,7 +372,10 @@ fn make_command(make_cmd: &str, build_dir: &Path, num_jobs: &str) -> Command {
 
     if let Ok(makeflags) = std::env::var("CARGO_MAKEFLAGS") {
         let makeflags = if let Ok(orig_makeflags) = std::env::var("MAKEFLAGS") {
-            format!("{orig_makeflags} {makeflags}")
+            // Prepend Cargo makeflags before externally configured makeflags
+            // Adding Cargo makeflags at the end was causing issues, see
+            // https://github.com/tikv/jemallocator/issues/92#issuecomment-3536269176.
+            format!("{makeflags} {orig_makeflags}")
         } else {
             makeflags
         };