Make simulator compile on MacOS

Tested on MacOS Sequoia (Apple Silicon) with the
latest Xcode command line tools, gcc 14
(Homebrew GCC 14.2.0_1) and sdl2 (Homebrew 2.30.9)

Make sure 'gcc' (and 'gcc-ar') is in your PATH
ahead of the Xcode-provided "gcc"(clang). E.g.
by setting up symlinks in /usr/local/bin that
point to gcc-14 and gcc-ar-14.

Notes:
- The appropriate bmp from uisimulator/bitmaps
  has to be manually copied to your build folder
  and renamed to UI256.bmp, if you want the sim
  background to be displayed

Change-Id: I559f33d2165065f913f30c016b85906af380fb81

uisimulator/uisimulator.make

@@ -21,8 +21,12 @@ SIMLIB = $(BUILDDIR)/uisimulator/libuisimulator.a
 ifeq (yes,$(APPLICATION))
 UIBMP=
 else
+ifeq ($(UNAME), Darwin)
+UIBMP=
+else
 UIBMP=$(BUILDDIR)/UI256.bmp
 endif
+endif
 
 .SECONDEXPANSION: # $$(OBJ) is not populated until after this
 
@@ -31,8 +35,12 @@ $(SIMLIB): $$(SIMOBJ) $(UIBMP)
 	$(call PRINTS,AR $(@F))$(AR) rcs $@ $^ >/dev/null
 
 $(BUILDDIR)/$(BINARY): $$(OBJ) $(FIRMLIB) $(VOICESPEEXLIB) $(CORE_LIBS) $(SIMLIB)
+ifeq ($(UNAME), Darwin)
+	$(call PRINTS,LD $(BINARY))$(CC) -o $@ $^ $(SIMLIB) $(LDOPTS) $(GLOBAL_LDOPTS) -Wl,-map,$(BUILDDIR)/rockbox.map
+else
 	$(call PRINTS,LD $(BINARY))$(CC) -o $@ -Wl,--start-group $^ -Wl,--end-group $(LDOPTS) $(GLOBAL_LDOPTS) \
 	-Wl,-Map,$(BUILDDIR)/rockbox.map
+endif
 	$(SILENT)$(call objcopy,$@,$@)
 
 $(BUILDDIR)/uisimulator/%.o: $(ROOTDIR)/uisimulator/%.c