All necessary changes to compile on Ubuntu.

.gitignore

@@ -7,3 +7,4 @@ parsegen
 win/confloc.h
 zsnes
 zsnes.exe
+usr

Makefile

@@ -6,17 +6,17 @@ CC ?= gcc
 CXX ?= g++
 
 # TODO: FreeBSD has a patch for being able to build without -fcommon
-CFLAGS += -m32 -pthread -no-pie -std=gnu99 -fcommon -O1 -march=pentium-mmx -fno-inline -fno-pic -mtune=generic -mmmx -D_FORTIY_SOURCE=2 -L/usr/lib32 -mno-sse -mno-sse2 -ffunction-sections -fdata-sections -Wfatal-errors -w
-CXXFLAGS += -m32 -pthread -no-pie -std=gnu++14 -O1 -march=pentium-mmx -fno-inline -fno-pic -mtune=generic -mmmx -D_FORTIFY_SOURCE=2 -L/usr/lib32 -mno-sse -mno-sse2 -ffunction-sections -fdata-sections -Wfatal-errors -w
-LDFLAGS += -Wl,--as-needed -no-pie -L/usr/lib32 -Wl,--gc-sections -lz
+CFLAGS += -m32 -pthread -no-pie -std=gnu99 -fcommon -O1 -march=pentium-mmx -fno-inline -fno-pic -mtune=generic -mmmx -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -L./usr/lib -mno-sse -mno-sse2 -ffunction-sections -fdata-sections -Wfatal-errors -w
+CXXFLAGS += -m32 -pthread -no-pie -std=gnu++14 -O1 -march=pentium-mmx -fno-inline -fno-pic -mtune=generic -mmmx -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -L./usr/lib -mno-sse -mno-sse2 -ffunction-sections -fdata-sections -Wfatal-errors -w
+LDFLAGS += -Wl,--as-needed -no-pie -L./usr/lib -Wl,--gc-sections -lz
 # -O1 is mandatory
 ASMFLAGS += -O1 -w-orphan-labels
 
 #WITH_AO       := yes
 #WITH_DEBUGGER := yes
-WITH_JMA      := yes
+#WITH_JMA      := yes
 WITH_OPENGL   := yes
-WITH_PNG      := yes
+#WITH_PNG      := yes
 WITH_SDL      := yes
 
 BINARY     ?= zsnes
@@ -83,12 +83,6 @@ else
   CFGDEFS += -DNO_AO
 endif
 
-ifeq ($(wildcard /usr/lib/i386-linux-gnu/.),)
-  CFLAGS += -I/usr/include/x86_64-linux-gnu -I /usr/include/X11
-  CXXFLAGS += -I/usr/include/x86_64-linux-gnu -I /usr/include/X11
-  LDFLAGS = -Wl,--as-needed -no-pie -L/usr/lib32 -L/usr/lib/i386-linux-gnu -Wl,--gc-sections -lz -lSDL-1.2 -lpng16 -lX11
-endif
-
 SRCS :=
 SRCS += c_init.c
 SRCS += c_vcache.c