diff --git a/src/Makefile b/src/Makefile
index cd6cf3a1f..fb859a339 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -60,7 +60,8 @@
 #     Compile with GCC 4.6x version, add 'GCC46=1'
 #     Compile a profile version, add 'PROFILEMODE=1'
 #     Compile a debug version, add 'DEBUGMODE=1'
-#     Compile with extra warnings, add 'WARNINGMODE=1'
+#     Compile with less warnings, add 'RELAXWARNINGS=1'
+#     Generate compiler errors for most compiler warnings, add 'ERRORMODE=1'
 #     Compile without NASM's tmap.nas, add 'NOASM=1'
 #     Compile without 3D hardware support, add 'NOHW=1'
 #     Compile with GDBstubs, add 'RDB=1'
@@ -80,6 +81,58 @@
 #
 #############################################################################
 
+ALL_SYSTEMS=\
+	PANDORA\
+	LINUX64\
+	MINGW64\
+	HAIKU\
+	DUMMY\
+	DJGPPDOS\
+	MINGW\
+	UNIX\
+	LINUX\
+	SOLARIS\
+	FREEBSD\
+	MACOSX\
+	SDL\
+
+# check for user specified system
+ifeq (,$(filter $(ALL_SYSTEMS),$(.VARIABLES)))
+ifeq ($(OS),Windows_NT) # all windows are Windows_NT...
+
+ $(info Detected a Windows system, compiling for 32-bit MinGW SDL2...)
+
+ # go for a 32-bit sdl mingw exe by default
+ MINGW=1
+ SDL=1
+ WINDOWSHELL=1
+
+else # if you on the *nix
+
+ system:=$(shell uname -s)
+
+ ifeq ($(system),Linux)
+ new_system=LINUX
+ else
+
+ $(error \
+	 Could not automatically detect your system,\
+	 try specifying a system manually)
+
+ endif
+
+ ifeq ($(shell getconf LONG_BIT),64)
+ system+=64-bit
+ new_system:=$(new_system)64
+ endif
+
+ $(info Detected $(system) ($(new_system))...)
+ $(new_system)=1
+
+endif
+endif
+
+
 # SRB2 data files
 D_DIR?=../bin/Resources
 D_FILES=$(D_DIR)/srb2.srb \
diff --git a/src/Makefile.cfg b/src/Makefile.cfg
index a3baeedda..e45265cab 100644
--- a/src/Makefile.cfg
+++ b/src/Makefile.cfg
@@ -1,3 +1,4 @@
+# vim: ft=make
 #
 # Makefile.cfg for SRB2
 #
@@ -7,7 +8,90 @@
 # and other things
 #
 
+# See the following variable don't start with 'GCC'. This is
+# to avoid a false positive with the version detection...
+
+SUPPORTED_GCC_VERSIONS:=\
+	101 102\
+	91 92 93\
+	81 82 83 84\
+	71 72 73 74 75\
+	61 62 63 64\
+	51 52 53 54 55\
+	40 41 42 43 44 45 46 47 48 49
+
+LATEST_GCC_VERSION=10.2
+
+# gcc or g++
+ifdef PREFIX
+	CC=$(PREFIX)-gcc
+	CXX=$(PREFIX)-g++
+	OBJCOPY=$(PREFIX)-objcopy
+	OBJDUMP=$(PREFIX)-objdump
+	STRIP=$(PREFIX)-strip
+	WINDRES=$(PREFIX)-windres
+else
+	OBJCOPY=objcopy
+	OBJDUMP=objdump
+	STRIP=strip
+	WINDRES=windres
+endif
+
+# because Apple screws with us on this
+# need to get bintools from homebrew
+ifdef MACOSX
+	CC=clang
+	CXX=clang
+	OBJCOPY=gobjcopy
+	OBJDUMP=gobjdump
+endif
+
+# Automatically set version flag, but not if one was manually set
+ifeq   (,$(filter GCC%,$(.VARIABLES)))
+ version:=$(shell $(CC) --version)
+ # check if this is in fact GCC
+ ifneq (,$(or $(findstring gcc,$(version)),$(findstring GCC,$(version))))
+  version:=$(shell $(CC) -dumpversion)
+
+  # Turn version into words of major, minor
+  v:=$(subst ., ,$(version))
+  # concat. major minor
+  v:=$(word 1,$(v))$(word 2,$(v))
+
+  # If this version is not in the list, default to the latest supported
+  ifeq (,$(filter $(v),$(SUPPORTED_GCC_VERSIONS)))
+   $(info\
+		Your compiler version, GCC $(version), is not supported by the Makefile.\
+		The Makefile will assume GCC $(LATEST_GCC_VERSION).)
+   GCC$(subst .,,$(LATEST_GCC_VERSION))=1
+  else
+   $(info Detected GCC $(version) (GCC$(v)))
+   GCC$(v)=1
+  endif
+ endif
+endif
+
+ifdef GCC102
+GCC101=1
+endif
+
+ifdef GCC101
+GCC93=1
+endif
+
+ifdef GCC93
+GCC92=1
+endif
+
+ifdef GCC92
+GCC91=1
+endif
+
 ifdef GCC91
+GCC84=1
+endif
+
+ifdef GCC84
 GCC83=1
 endif
 
@@ -20,6 +104,18 @@ GCC81=1
 endif
 
 ifdef GCC81
+GCC75=1
+endif
+
+ifdef GCC75
+GCC74=1
+endif
+
+ifdef GCC74
+GCC73=1
+endif
+
+ifdef GCC73
 GCC72=1
 endif
 
@@ -44,6 +140,10 @@ GCC61=1
 endif
 
 ifdef GCC61
+GCC55=1
+endif
+
+ifdef GCC55
 GCC54=1
 endif
 
@@ -114,10 +214,7 @@ WFLAGS=-Wall
 ifndef GCC295
 #WFLAGS+=-Wno-packed
 endif
-ifdef ERRORMODE
-WARNINGMODE=1
-endif
-ifdef WARNINGMODE
+ifndef RELAXWARNINGS
  WFLAGS+=-W
 #WFLAGS+=-Wno-sign-compare
 ifndef GCC295
@@ -463,30 +560,6 @@ ifdef ARCHNAME
 	BIN:=$(BIN)/$(ARCHNAME)
 endif
 
-# gcc or g++
-ifdef PREFIX
-	CC=$(PREFIX)-gcc
-	CXX=$(PREFIX)-g++
-	OBJCOPY=$(PREFIX)-objcopy
-	OBJDUMP=$(PREFIX)-objdump
-	STRIP=$(PREFIX)-strip
-	WINDRES=$(PREFIX)-windres
-else
-	OBJCOPY=objcopy
-	OBJDUMP=objdump
-	STRIP=strip
-	WINDRES=windres
-endif
-
-# because Apple screws with us on this
-# need to get bintools from homebrew
-ifdef MACOSX
-	CC=clang
-	CXX=clang
-	OBJCOPY=gobjcopy
-	OBJDUMP=gobjdump
-endif
-
 OBJDUMP_OPTS?=--wide --source --line-numbers
 LD=$(CC)