use a more conventional macro name

also fix an issue with CMake <3.26 compatibility

CMakeLists.txt

@@ -464,7 +464,7 @@ execute_process(
     ERROR_VARIABLE output
 )
 if (output MATCHES "dyld-1015\.7")
-    add_compile_definitions(-DBUGGY_APPLE_LINKER)
+    add_compile_definitions(HAVE_BUGGY_APPLE_LINKER)
 endif()
 
 # Architecture specific

Makefile

@@ -241,7 +241,7 @@ endif
 
 # this version of Apple ld64 is buggy
 ifneq '' '$(findstring dyld-1015.7,$(shell $(CC) $(LDFLAGS) -Wl,-v 2>&1))'
-	MK_CPPFLAGS += -DBUGGY_APPLE_LINKER
+	MK_CPPFLAGS += -DHAVE_BUGGY_APPLE_LINKER
 endif
 
 # OS specific

ggml-quants.c

@@ -1273,7 +1273,7 @@ static float make_qkx2_quants(int n, int nmax, const float * restrict x, const f
     float max = x[0];
     float sum_w = weights[0];
     float sum_x = sum_w * x[0];
-#ifdef BUGGY_APPLE_LINKER
+#ifdef HAVE_BUGGY_APPLE_LINKER
     // use 'volatile' to prevent unroll and work around a bug in Apple ld64 1015.7
     for (volatile int i = 1; i < n; ++i) {
 #else