[libgda] Gracefuly handle the absence of yelp-build

[Vivien Malerba <vivien src gnome org>]

commit 9474142b46869cf9edbceb9674f795184f7b521c
Author: Vivien Malerba <malerba gnome-db org>
Date:   Thu Apr 5 18:57:50 2012 +0200

    Gracefuly handle the absence of yelp-build

 configure.ac    |    9 +++++----
 doc/Makefile.am |    6 +++++-
 2 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 220bc8d..3d2495f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -607,13 +607,14 @@ enable_vala_doc="no"
 if test "x$enable_gtk_doc" = "xyes"
 then
 dnl Find yelp-build program
-	AC_PATH_PROG(YELP_BUILD, [yelp-build], [no])
+    AC_PATH_PROG(YELP_BUILD, [yelp-build], [no])
     if test "x$YELP_BUILD" = "xno";
     then
-        AC_MSG_ERROR([Vala documentation requested but yelp-build not found])
+        AC_MSG_RESULT([Vala documentation not build because yelp-build has not been found])
+    else
+        AC_SUBST(YELP_BUILD)
+        enable_vala_doc="yes"
     fi
-	AC_SUBST(YELP_BUILD)
-    enable_vala_doc="yes"
 fi
 AM_CONDITIONAL(ENABLE_VALA_DOC, [test "$enable_vala_doc" = "yes"])
 
diff --git a/doc/Makefile.am b/doc/Makefile.am
index 421c599..2d3c84e 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -1,3 +1,7 @@
-SUBDIRS = C mallard
+if ENABLE_VALA_DOC
+MALLARD_DOC_DIR=mallard
+endif
+
+SUBDIRS = C $(MALLARD_DOC_DIR)
 
 DOC_LINGUAS = el es gl