diff --git a/gitinfo.awk b/gitinfo.awk
new file mode 100644
index 0000000..cc16d26
--- /dev/null
+++ b/gitinfo.awk
@@ -0,0 +1,16 @@
+#!/usr/bin/gawk -f
+
+BEGIN {
+   printf("#ifndef __GITDEFS_H__\n")
+   printf("#define __GITDEFS_H__\n\n")
+   printf("/* Do not edit this file */\n")
+   printf("/* Automatic generated by gitinfo.awk */\n\n\n")
+}
+
+NR == 1 { printf("#define GIT_HASH_STR \"%s\"\n", $0);      }
+NR == 2 { printf("#define GIT_HASH_HEX  0x%s\n", $0);       }
+NR == 3 { printf("#define GIT_BRANCH_STR \"%s\"\n", $0);    }
+NR == 4 { printf("#define GIT_VERSION_STR \"%s\"\n", $0);   }
+NR == 5 { printf("#define GIT_BUILD_NR %u\n", $0);
+          printf("#define GIT_BUILD_STR \"%s\"\n", $0);     }
+END     { printf("\n\n#endif\n\n");                         }
diff --git a/prebuild.sh b/prebuild.sh
new file mode 100644
index 0000000..a18bb2d
--- /dev/null
+++ b/prebuild.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+git describe --abbrev=8 --dirty --always > gitinfo.txt
+git describe --abbrev=8 --always >> gitinfo.txt
+git rev-parse --abbrev-ref HEAD >> gitinfo.txt
+git describe --always --tags --dirty=-d | gawk 'NR==1{print $0}' >> gitinfo.txt
+git rev-list HEAD | wc -l | tr -d ' ' >> gitinfo.txt
+gawk -f gitinfo.awk < gitinfo.txt > gitdefs.h
+rm -f gitinfo.txt