===> Building for libretro-bsnes-mercury-20180803
clang++ -pipe -Os -std=gnu99 -xc -I. -DSFC_LAGFIX -fPIC -D__LIBRETRO__ -DGIT_VERSION=\"-pkgsrc\" -c libco/libco.c -o obj/libco.o
In file included from libco/libco.c:14:
libco/aarch64.c:15:10: fatal error: 'malloc.h' file not found
#include <malloc.h>
         ^~~~~~~~~~
1 error generated.
gmake: *** [Makefile:125: obj/libco.o] Error 1
*** Error code 2

Stop.
bmake[1]: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/emulators/libretro-bsnes-mercury
*** Error code 1

Stop.
bmake: stopped making "all" in /Volumes/data/jenkins/workspace/pkgsrc-macos-trunk-arm64/emulators/libretro-bsnes-mercury