Autotools: read git commit hash at compile time

Also do as cmake to avoid full recompilation when the hash changes.

config/lyxinclude.m4

@@ -39,16 +39,6 @@ esac
 AC_SUBST(lyx_devel_version)
 ])
 
-dnl If LyX is compiled from a git clone, find the HEAD commit hash
-dnl
-dnl
-AC_DEFUN([LYX_CHECK_GIT_COMMIT], [
-AC_MSG_CHECKING([for git commit hash])
-lyxgitcommit=`cd "$srcdir" && git log -1 --pretty=format:%H 2>/dev/null || true`
-test x$lyxgitcommit = x && lyxgitcommit="none"
-AC_MSG_RESULT($lyxgitcommit)
-])
-
 
 dnl Define the option to set a LyX version on installed executables and directories
 dnl

configure.ac

@@ -35,8 +35,6 @@ AM_INIT_AUTOMAKE([foreign dist-bzip2 no-define 1.8] LYX_OBJECTS_LAYOUT)
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 PACKAGE=$save_PACKAGE
 
-LYX_CHECK_GIT_COMMIT
-
 # Allow to build some parts of the code as one big chunk
 m4_define([ALLPARTS],[boost,client,insets,mathed,core,tex2lyx,frontend_qt])
 AC_ARG_ENABLE(monolithic-build,
@@ -327,7 +325,6 @@ AC_DEFINE_UNQUOTED([PROGRAM_SUFFIX],
 	"${version_suffix}",[Program version suffix])
 
 AC_DEFINE_UNQUOTED([LYX_DATE],"$LYX_DATE",[Date of release])
-AC_DEFINE_UNQUOTED([LYX_GIT_COMMIT_HASH], "$lyxgitcommit", [Git commit])
 AC_DEFINE_UNQUOTED([VERSION_INFO],"$VERSION_INFO",[Full version info])
 AC_DEFINE_UNQUOTED([LYX_DIR_VER],"$lyx_dir_ver",[Versioned env var for system dir])
 AC_DEFINE_UNQUOTED([LYX_USERDIR_VER],"$lyx_userdir_ver",[Versioned env var for user dir])

src/Makefile.am

@@ -11,7 +11,8 @@ endif
 
 SUBDIRS = support frontends . $(CLIENT) tex2lyx
 
-EXTRA_DIST = pch.h \
+EXTRA_DIST = lyx_commit_hash.h.in \
+	pch.h \
 	CMakeLists.txt \
 	graphics/CMakeLists.txt \
 	insets/CMakeLists.txt \
@@ -302,6 +303,13 @@ HEADERFILESCORE = \
 STANDALONEFILES = \
 	Layout.cpp
 
+.PHONY: lyx_commit_hash.h
+
+lyx_commit_hash.h:
+	$(AM_V_GEN)hash=`cd "$(top_srcdir)" && git log -1 --pretty=format:%H 2>/dev/null || echo none` ; \
+        sed s/@LYX_GIT_COMMIT_HASH@/$$hash/ "$(srcdir)"/lyx_commit_hash.h.in >$@
+BUILT_SOURCES += lyx_commit_hash.h
+CLEANFILES += lyx_commit_hash.h
 
 lyxcore.cpp:
 	@echo -e '$(SOURCEFILESCORE:%=\n#include "%")\n' > $@
@@ -336,7 +344,7 @@ BUILT_SOURCES += $(MOCEDFILES)
 CLEANFILES += $(MOCEDFILES)
 
 moc_%.cpp: %.h
-	$(QT_MOC) $(MOCFLAG) -o $@ $<
+	$(AM_V_GEN)$(QT_MOC) $(MOCFLAG) -o $@ $<
 
 liblyxcore_a_DEPENDENCIES = $(MOCEDFILES)
 

src/lyx_commit_hash.h.in

@@ -0,0 +1,16 @@
+/*
+ * \file lyx_commit_hash.h
+ * This file is part of LyX, the document processor.
+ * Licence details can be found in the file COPYING.
+ *
+ * If LyX is compiled from a git clone, this should contain the HEAD
+ * commit hash.
+ */
+
+#ifndef _LYX_COMMIT_HASH_H
+#define _LYX_COMMIT_HASH_H
+
+#define LYX_GIT_COMMIT_HASH "@LYX_GIT_COMMIT_HASH@"
+
+#endif
+

src/version.cpp

@@ -10,11 +10,13 @@
  */
 
 #include <config.h>
+
 #if ! defined(LYX_DATE)
-	#include <lyx_date.h>
+#include "lyx_date.h"
 #endif
+
 #if ! defined(LYX_GIT_COMMIT_HASH)
-	#include <lyx_commit_hash.h>
+#include "lyx_commit_hash.h"
 #endif
 
 ///