Index: package.yml
===================================================================
--- package.yml
+++ package.yml
@@ -16,6 +16,7 @@
     (how else can you prove that you have recreated the hardware faithfully?). Over time, MAME absorbed the sister-project MESS
     (Multi Emulator Super System), so MAME now documents a wide variety of (mostly vintage) computers, video game consoles
     and calculators, in addition to the arcade video games that were its initial focus.
+clang      : yes
 builddeps  :
     - pkgconfig(sdl2)
     - pkgconfig(SDL2_ttf)
@@ -31,6 +32,7 @@
     - portmidi-devel
 build      : |
     # TODO: readd system Lua once 5.3 will be available
+    # without CC="$CC", mame will ignore clang
     %make USE_SYSTEM_LIB_ZLIB=1 \
           USE_SYSTEM_LIB_JPEG=1 \
           USE_SYSTEM_LIB_FLAC=1 \
@@ -38,7 +40,9 @@
           USE_SYSTEM_LIB_EXPAT=1 \
           USE_SYSTEM_LIB_PORTAUDIO=1 \
           USE_SYSTEM_LIB_PORTMIDI=1 \
+          CC="$CC" \
           NOWERROR=1 \
+          OPTIMIZE=2 \
           REGENIE=1 \
 install    : |
     # TODO: add installation code as %make_install is not defined here