removed Visual Studio specific makefile define MAXOPT in favor of adding more generic define LTO [Oliver Stöneberg]

makefile

@@ -250,6 +250,9 @@ BUILD_MIDILIB = 1
 # specify the sanitizer to use or leave empty to use none
 # SANITIZE = 
 
+# uncomment next line to enable LTO (link-time optimizations)
+# LTO = 1
+
 # specify optimization level or leave commented to use the default
 # (default is OPTIMIZE = 3 normally, or OPTIMIZE = 0 with symbols)
 # OPTIMIZE = 3
@@ -495,6 +498,9 @@ endif
 # if we are optimizing, include optimization options
 ifneq ($(OPTIMIZE),0)
 CCOMFLAGS += -fno-strict-aliasing $(ARCHOPTS)
+ifdef LTO
+CCOMFLAGS += -flto
+endif
 endif
 
 # add a basic set of warnings
@@ -603,6 +609,12 @@ LDFLAGS += -s
 endif
 endif
 
+ifneq ($(OPTIMIZE),0)
+ifdef LTO
+LDFLAGS += -flto
+endif
+endif
+
 # output a map file (emulator only)
 ifdef MAP
 LDFLAGSEMULATOR += -Wl,-Map,$(FULLNAME).map

src/osd/windows/windows.mak

@@ -129,12 +129,12 @@ else
 CCOMFLAGS += /MT
 endif
 
-# turn on link-time codegen if the MAXOPT flag is also set
-ifdef MAXOPT
-CCOMFLAGS += /GL
-LDFLAGS += /LTCG
+# use link-time optimizations when enabled
+ifneq ($(OPTIMIZE),0)
+ifdef LTO
 AR += /LTCG
 endif
+endif
 
 # disable warnings and link against bufferoverflowu for 64-bit targets
 ifeq ($(PTR64),1)