diff --git a/Makefile b/Makefile
index 4331990..fb5eede 100644
--- a/Makefile
+++ b/Makefile
@@ -81,9 +81,9 @@ alldir	=	burn \
 			generated \
 			sdl-dingux
 #cpu/nec
-incdir	= $(foreach dir,$(alldir),-I$(srcdir)$(dir)) -I$(objdir)generated -I$(srcdir) -I/opt/miyoo/arm-miyoo-linux-uclibcgnueabi/sysroot/usr/include -I/opt/miyoo/arm-miyoo-linux-uclibcgnueabi/sysroot/usr/include/SDL
+incdir	= $(foreach dir,$(alldir),-I$(srcdir)$(dir)) -I$(objdir)generated -I$(srcdir)
 
-lib = -lstdc++ -lSDL -lSDL_image -lz
+lib = -lstdc++
 
 ifdef USE_LIBAO
 	lib += -lao
@@ -254,19 +254,61 @@ alldep	= $(foreach file,$(autobj:.o=.c), \
 
 HOSTCC = gcc
 HOSTCXX = g++
-CC	= /opt/miyoo/bin/arm-miyoo-linux-uclibcgnueabi-gcc
-CXX	= /opt/miyoo/bin/arm-miyoo-linux-uclibcgnueabi-g++
-LD	= $(CXX)
-AS	= /opt/miyoo/bin/arm-miyoo-linux-uclibcgnueabi-as
-
 HOSTCFLAGS = $(incdir)
-CFLAGS   = -O2 -march=armv5te -mtune=arm926ej-s -pipe -fno-builtin -fno-common \
-		-fomit-frame-pointer -fexpensive-optimizations -Wno-write-strings -DLSB_FIRST
-CXXFLAGS = -O2 -march=armv5te -mtune=arm926ej-s -pipe -fno-builtin -fno-common \
-		-fomit-frame-pointer -fexpensive-optimizations -Wno-write-strings -DLSB_FIRST
 
+CHAINPREFIX ?= /opt/miyoo
+CROSS_COMPILE ?= $(CHAINPREFIX)/usr/bin/arm-linux-
+CC	= $(CROSS_COMPILE)gcc
+CXX	= $(CROSS_COMPILE)g++
+# `ld` fail with gcc platform cflags, use cc instead
+LD	= $(CC)
+AS	= $(CROSS_COMPILE)as
+
+PKG_CONFIG ?= $(CHAINPREFIX)/usr/bin/pkg-config
+PKGS = sdl SDL_image zlib
+PKGS_CFLAGS = $(shell $(PKG_CONFIG) --cflags $(PKGS))
+PKGS_LIBS = $(shell $(PKG_CONFIG) --libs $(PKGS))
+# use custom -O2 flags (imported from GCC 9.5) to be less agressive
+O2_OPT  = -falign-functions -falign-jumps \
+		-falign-labels -falign-loops \
+		-fcaller-saves \
+		-fcode-hoisting \
+		-fcrossjumping \
+		-fcse-follow-jumps -fcse-skip-blocks \
+		-fdelete-null-pointer-checks \
+		-fdevirtualize -fdevirtualize-speculatively \
+		-fexpensive-optimizations \
+		-fgcse -fgcse-lm \
+		-fhoist-adjacent-loads \
+		-finline-small-functions \
+		-findirect-inlining \
+		-fipa-bit-cp -fipa-cp -fipa-icf \
+		-fipa-ra -fipa-sra -fipa-vrp \
+		-fisolate-erroneous-paths-dereference \
+		-flra-remat \
+		-foptimize-sibling-calls \
+		-foptimize-strlen \
+		-fpartial-inlining \
+		-fpeephole2 \
+		-freorder-blocks-algorithm=stc \
+		-freorder-functions \
+		-frerun-cse-after-loop \
+		-fschedule-insns -fschedule-insns2 \
+		-fsched-interblock -fsched-spec \
+		-fstore-merging \
+		-fstrict-aliasing \
+		-fthread-jumps \
+		-ftree-builtin-call-dce \
+		-ftree-pre \
+		-ftree-switch-conversion -ftree-tail-merge \
+		-ftree-vrp
+CFLAGS   = $(O2_OPT) -march=armv5te -mtune=arm926ej-s -pipe -fno-builtin -fno-common \
+		-fomit-frame-pointer -Wno-write-strings -DLSB_FIRST
 CFLAGS += -D__cdecl="" -D__fastcall=""
-CXXFLAGS += -D__cdecl="" -D__fastcall=""
+CFLAGS += $(PKGS_CFLAGS)
+CXXFLAGS = $(CFLAGS)
+
+lib += $(PKGS_LIBS)
 
 ifdef USE_LIBAO
 	CFLAGS += -DUSE_LIBAO
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..50f7c8b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,11 @@
+## FBA - Final Burn Alpha SDL for MiyooCFW
+
+### Cross-Compile build (MiyooCFW):
+```
+make -j$(nproc)
+```
+
+### Native build (linux):
+```
+no instructions yet
+```
diff --git a/readme.txt b/readme-dingux.txt
similarity index 100%
rename from readme.txt
rename to readme-dingux.txt
diff --git a/readme_miyoo.txt b/readme_miyoo.txt
deleted file mode 100644
index 71bcc40..0000000
--- a/readme_miyoo.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-This source requires the old miyoo toolchain (uclibcgnueabi) to successfully build and run:
-https://github.com/steward-fu/miyoo/releases/download/v1.0/toolchain.7z
-
-To build, edit "Makefile" to point CC, CXX, AS, and the directory paths in "incdir" to your installation of the Miyoo toolchain, then go into the source main directory, and run "make".
-
-You may also need to give the Perl scripts in "src/scripts" executive permissions. If they can't execute/run, the build will fail.
diff --git a/readmeagain.md b/readmeagain.md
deleted file mode 100644
index 4ce83f5..0000000
--- a/readmeagain.md
+++ /dev/null
@@ -1,3 +0,0 @@
-## 说明
-
-这个是miyoo用的fba-a320模拟器源码，z80和C68用的drz80和cylone汇编代码替换。部分游戏满帧，但是恐龙世纪等部分游戏没声音。
\ No newline at end of file