Use ASAN_OPTIONS=detect_leaks=1 instead of -fsanitize=leak

CMakeLists.txt

@@ -45,7 +45,7 @@ else()
     add_compile_options(-Wno-gnu-zero-variadic-macro-arguments)
   endif()
   if(SANITIZERS)
-    set(SAN_FLAGS -fsanitize=address -fsanitize=leak -fsanitize=undefined)
+    set(SAN_FLAGS -fsanitize=address -fsanitize=undefined)
     add_compile_options(${SAN_FLAGS})
     add_link_options(${SAN_FLAGS})
     add_definitions(-D_GLIBCXX_ASSERTIONS)

Makefile

@@ -207,7 +207,7 @@ develop:
 		-Wno-format-nonliteral -Wno-strict-overflow -Wno-unused-but-set-variable \
 		-Wno-type-limits -Wno-tautological-constant-out-of-range-compare -Wvla \
 		-D_GLIBCXX_ASSERTIONS \
-		-fsanitize=address -fsanitize=leak -fsanitize=undefined" \
+		-fsanitize=address -fsanitize=undefined" \
 		CXXFLAGS="-ggdb3 -Og -fno-omit-frame-pointer -fno-optimize-sibling-calls"
 
 # This target is used during development in order to more easily debug with gdb.

test/run-tests.sh

@@ -41,6 +41,10 @@ if [[ ! ( -x ../rgbasm && -x ../rgblink && -x ../rgbfix && -x ../rgbgfx ) ]]; th
 	false
 fi
 
+# We do not compile with `-fsanitize=leak` because macOS clang++ does not support it.
+# Instead, enable ASan (`-fsanitize=address`) to check for memory leaks.
+export ASAN_OPTIONS=detect_leaks=1
+
 # Tests included with the repository
 
 for dir in asm link fix gfx; do