Add command line flag to show android-efi version

main.c

@@ -26,6 +26,10 @@ enum command_line_argument {
     KERNEL_PARAMETERS
 };
 
+#ifndef ANDROID_EFI_VERSION
+#define ANDROID_EFI_VERSION  "unknown"
+#endif
+
 #define STATE_SKIP_SPACES  (1 << 0)
 #define STATE_FOUND_DASH   (1 << 1)
 #define STATE_IMAGE_PATH   (1 << 2)
@@ -56,6 +60,11 @@ static EFI_STATUS parse_command_line(EFI_LOADED_IMAGE_PROTOCOL *loaded_image, st
         // additional kernel parameters
         if (state & STATE_FOUND_DASH) {
             if (c == L'-') {
+                if (StrnCmp(&opt[start], L"--version", length - start) == 0) {
+                    Print(L"android-efi version " ANDROID_EFI_VERSION "\n");
+                    return EFI_ABORTED;
+                }
+
                 argument = KERNEL_PARAMETERS;
                 state |= STATE_SKIP_SPACES;
                 continue;

meson.build

@@ -2,6 +2,7 @@
 # Copyright (C) 2017 lambdadroid
 
 project('android-efi', 'c',
+    version: '0.3.0',
     license: 'GPL-2.0',
     default_options: [
         'buildtype=debugoptimized',
@@ -46,7 +47,8 @@ android_efi_lib = shared_library('android-efi',
         '-maccumulate-outgoing-args',
         '-mno-red-zone',
         '-mno-mmx',
-        '-DGNU_EFI_USE_MS_ABI'
+        '-DGNU_EFI_USE_MS_ABI',
+        '-DANDROID_EFI_VERSION="' + meson.project_version() + '"'
     ],
     objects: [efi_crt],
     link_args: [