Add git version to the reported version

Makefile

@@ -49,6 +49,11 @@ ifeq ($(STATIC_LINKING), 1)
 EXT := a
 endif
 
+GIT_VERSION := " $(shell git rev-parse --short HEAD || echo unknown)"
+ifneq ($(GIT_VERSION)," unknown")
+	CXXFLAGS += -DGIT_VERSION=\"$(GIT_VERSION)\"
+endif
+
 ifneq (,$(findstring unix,$(platform)))
 	EXT ?= so
    TARGET := $(TARGET_NAME)_libretro.$(EXT)

src/libretro/libretro.cpp

@@ -93,7 +93,10 @@ extern "C"
     std::memset(info, 0, sizeof(*info));
 
     info->library_name = "retro-8 (alpha)";
-    info->library_version = "0.1b";
+#ifndef GIT_VERSION
+#define GIT_VERSION ""
+#endif
+    info->library_version = "0.1b" GIT_VERSION;
     info->need_fullpath = false;
     info->valid_extensions = "p8|png";
   }