From 2c24c3d4057eb9d53e56939fc706655a553f5e8f Mon Sep 17 00:00:00 2001
From: Paul Romano <romano7@gmail.com>
Date: Fri, 23 Mar 2012 08:42:03 -0400
Subject: [PATCH] Added git SHA1 hash on output through Makefile symbol.

---
 src/Makefile   | 8 +++++++-
 src/output.F90 | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Makefile b/src/Makefile
index 14b74bd85a..a5c9237e2f 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -22,6 +22,12 @@ OPTIMIZE = no
 USE_MPI  = no
 USE_HDF5 = no
 
+#===============================================================================
+# Add git SHA-1 hash
+#===============================================================================
+
+GIT_SHA1 = $(shell git log -1 | head -n 1 | awk '{print $$2}')
+
 #===============================================================================
 # GNU Fortran compiler options
 #===============================================================================
@@ -212,7 +218,7 @@ neat:
 .PHONY: all xml-fortran clean neat distclean 
 
 %.o: %.F90
-	$(F90) $(F90FLAGS) -Ixml-fortran -Ixml-fortran/templates -c $<
+	$(F90) $(F90FLAGS) -DGIT_SHA1="\"$(GIT_SHA1)\"" -Ixml-fortran -Ixml-fortran/templates -c $<
 
 #===============================================================================
 # Dependencies
diff --git a/src/output.F90 b/src/output.F90
index 920d9643f7..c389fab8d1 100644
--- a/src/output.F90
+++ b/src/output.F90
@@ -50,6 +50,9 @@ contains
          '     Developed At:  Massachusetts Institute of Technology'
     write(UNIT=OUTPUT_UNIT, FMT='(6X,"Version:",7X,I1,".",I1,".",I1)') &
          VERSION_MAJOR, VERSION_MINOR, VERSION_RELEASE
+#ifdef GIT_SHA1
+    write(UNIT=OUTPUT_UNIT, FMT='(6X,"Git SHA1:",6X,A)') GIT_SHA1
+#endif
 
     ! Write the date and time
     call get_today(today_date, today_time)