Question

source /opt/os-sdk/16.0.0-aarch64/environment-setup-aarch64-uhos-linux

aarch64-uhos-linux-gcc -fsanitize=address -g -o leak leak.c
leak.c:1:10: fatal error: stdio.h: No such file or directory
    1 | #include <stdio.h>
      |          ^~~~~~~~~

Answer

aarch64-uhos-linux-gcc --sysroot=/opt/os-sdk/16.0.0-aarch64/sysroots/aarch64-uhos-linux -fsanitize=address -g -o leak leak.c

or use Makefile:

cat Makefile
all: leak

leak: leak.c
	${CC} -fsanitize=address -g -o leak leak.c

clean:
	rm leak