From c54a3463d4b8c32a19a6cd9adc4beff95429ab2d Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Wed, 29 Jan 2014 22:54:17 -0500
Subject: [PATCH] Define GIT_SHA1 in header file.

---
 .gitignore         |  1 +
 src/CMakeLists.txt | 19 ++++++++++++++++++-
 src/output.F90     |  1 +
 3 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 9f720f9894..bc3678cc38 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.mod
 *.log
 *.out
+git_sha1.h
 
 # Compiler python objects
 *.pyc
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 95cda112af..453a87c89b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -137,6 +137,24 @@ if(petsc)
   set(libraries "${PETSC_PACKAGE_LIBS};${libpetsc};${libraries}")
 endif()
 
+#===============================================================================
+# git SHA1 hash
+#===============================================================================
+
+execute_process(COMMAND git log -1
+                COMMAND head -n 1
+                COMMAND cut -c8-
+                WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                RESULT_VARIABLE GIT_SHA1_SUCCESS
+                OUTPUT_VARIABLE GIT_SHA1
+                ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+if(GIT_SHA1_SUCCESS EQUAL 0)
+  file(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/git_sha1.h
+    "#define GIT_SHA1 \"${GIT_SHA1}\"")
+else()
+  file(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/git_sha1.h "")
+endif()
+  
 #===============================================================================
 # FoX Fortran XML Library
 #===============================================================================
@@ -154,7 +172,6 @@ add_executable(${program} ${source})
 target_link_libraries(${program} ${libraries} fox)
 set_target_properties(${program} PROPERTIES
   COMPILE_FLAGS "${f90flags}"
-  COMPILE_DEFINITIONS "${definitions}"
   LINK_FLAGS "${ldflags}")
 
 #===============================================================================
diff --git a/src/output.F90 b/src/output.F90
index ee0a8391c2..061500734d 100644
--- a/src/output.F90
+++ b/src/output.F90
@@ -55,6 +55,7 @@ contains
          '     License:        http://mit-crpg.github.io/openmc/license.html'
     write(UNIT=OUTPUT_UNIT, FMT='(6X,"Version:",8X,I1,".",I1,".",I1)') &
          VERSION_MAJOR, VERSION_MINOR, VERSION_RELEASE
+#include "git_sha1.h"
 #ifdef GIT_SHA1
     write(UNIT=OUTPUT_UNIT, FMT='(6X,"Git SHA1:",7X,A)') GIT_SHA1
 #endif