general: add git hash to build version

Signed-off-by: Kieran Levin <ktl@frame.work>

Author: kiram9

Makefile

@@ -5,11 +5,13 @@ COSMOCC=../cosmopolitan
 gpu_cfg_generator.exe: gpu_cfg_generator
 	cp gpu_cfg_gen gpu_cfg_gen.exe
 
+GIT_HASH := $(shell git rev-parse --short HEAD 2>/dev/null || echo "unknown")
+
 gpu_cfg_generator: gpu_cfg_generator.c gpu_cfg_generator.h
-	$(COSMOCC)/bin/cosmocc -o gpu_cfg_gen *.c -I ./
+	$(COSMOCC)/bin/cosmocc -o gpu_cfg_gen *.c -I ./ -DGIT_HASH=\"$(GIT_HASH)\"
 
 native: gpu_cfg_generator.c gpu_cfg_generator.h
-	$(CC) -o gpu_cfg_gen *.c -Wall -I ./
+	$(CC) -o gpu_cfg_gen *.c -Wall -I ./ -DGIT_HASH=\"$(GIT_HASH)\"
 
 
 clean :

gpu_cfg_generator.c

@@ -1,6 +1,10 @@
 #include <gpu_cfg_generator.h>
 #include "crc.h"
 
+#ifndef GIT_HASH
+#define GIT_HASH "unknown"
+#endif
+
 
 static bool verbose = false;
 
@@ -539,7 +543,7 @@ int main(int argc, char *argv[]) {
 	default:
 		abort ();
 	}
-	printf("Build: %s %s\n", __DATE__, __TIME__);
+	printf("Build: %s %s (%s)\n", __DATE__, __TIME__, GIT_HASH);
 
 	if (infilename) {
 		read_eeprom(infilename);