Makefile: Add target to build natively

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

Makefile

@@ -1,5 +1,13 @@
-gpu_cfg_generator.o : gpu_cfg_generator.c gpu_cfg_generator.h
+.PHONY: native clean
+
+gpu_cfg_generator.exe: gpu_cfg_generator
+	cp gpu_cfg_gen gpu_cfg_gen.exe
+
+gpu_cfg_generator: gpu_cfg_generator.c gpu_cfg_generator.h
 	../cosmopolitan/bin/cosmocc -o gpu_cfg_gen gpu_cfg_generator.c
+
+native: gpu_cfg_generator.c gpu_cfg_generator.h
+	$(CC) -o gpu_cfg_gen gpu_cfg_generator.c -Wall
 
 
 clean :

readme.md

@@ -1,27 +1,43 @@
 # build notes
 
-uses
-https://github.com/jart/cosmopolitan
+Uses [cosmpopolitan](https://github.com/jart/cosmopolitan).
 
-extract cosmopolitan one folder up
+Extract cosmopolitan release zip one folder up.
 
+```sh
 run make
+```
 
+To use it on windows, rename `gpu_cfg_gen` to `gpu_cfg_gen.exe`.
 
-to use on windows rename
 
-gpu_cfg_gen to gpu_cfg_gen.exe
 
+# Running
+When the application is run, pass in the serial, and for the GPU, the PCB serial.
+The application will generate a `.bin` file in the same directory with the EEPROM contents.
 
-
-# Running 
-when the application is run, pass in the serial, and for the GPU, the PCB serial. 
-The application will generate a .bin file in the same directory with the EEPROM contents
 ## Generate GPU Serial
 
+```
 ./gpu_cfg_gen -g -s FRAKMBCP81331ASSY0 -p FRAGMASP81331PCB00
+```
 
 
 ## Generate SSD
 
+```
 ./gpu_cfg_gen -d -s FRAKMBCP81331ASSY0
+```
+
+# Build natively
+
+While the regular build builds a single executable that runs on Linux and
+Windows, for development purpose you might want to build using native tooling.
+
+```sh
+# With GCC
+make native CC=gcc
+
+# With clang
+make native CC=clang
+```