Unset CC before building to prevent env pollution

build-mingw-w64-libraries.sh

@@ -24,6 +24,7 @@ PREFIX="$1"
 mkdir -p "$PREFIX"
 PREFIX="$(cd "$PREFIX" && pwd)"
 export PATH="$PREFIX/bin:$PATH"
+unset CC
 
 : ${CORES:=$(nproc 2>/dev/null)}
 : ${CORES:=$(sysctl -n hw.ncpu 2>/dev/null)}