debugging: Add version

bootstrap

@@ -19,6 +19,37 @@
 ## @start 1
 #! /bin/sh
 
+version=
+
+if [ "$1" ]; then
+	version=$1
+elif head=$(git rev-parse --short --verify HEAD 2>/dev/null); then
+
+	# If available, use the git commit revision for the package version.
+
+	# Add a date prefix for easy reading.
+	# date='2010-11-30 16:36:09 -0800'
+
+	date=$(git log --pretty=format:"%ci" -1 HEAD)
+	date=${date##20}
+	date=${date%%:[0-9][0-9] *}
+	date=$(echo ${date} | sed -e 's/[- :]/./g')
+
+	version=$(printf '%s-%s%s' ${date} g ${head})
+
+	# Add a '-dirty' postfix for uncommitted changes.
+
+	if git diff-index HEAD | read dummy; then
+		version=`printf '%s%s' ${version} -dirty`
+	fi
+else
+	# Default to current date and time.
+
+	version="unknown-$(date +%y.%m.%d-%H.%M.%S)"
+fi
+
+echo "#define VERSION \"${version}\"" > version.h
+
 set -x
 aclocal -I config
 autoheader

kexec/kexec.c

@@ -50,6 +50,7 @@
 #include "kexec-zlib.h"
 #include "kexec-lzma.h"
 #include <arch/options.h>
+#include "../version.h"
 
 unsigned long long mem_min = 0;
 unsigned long long mem_max = ULONG_MAX;
@@ -1216,6 +1217,8 @@ int main(int argc, char *argv[])
 	};
 	static const char short_options[] = KEXEC_ALL_OPT_STR;
 
+	printf("kexec version: " VERSION "\n");
+
 	/*
 	 * First check if --use-kexec-file-syscall is set. That changes lot of
 	 * things