Fix T38370: Ubuntu 14.04 opencolorio segfaults blender on parsing colormanagement/config.ocio

Ubuntu hack: add a --libyaml-cpp-ver parameter, to try to force installing a given version of this lib...
(only for DEB-like distro, I dare hope Trusty (!) is the only affected distro.
Not happy at all to have such things here, this is actually an Ubuntu bug, but will have to live with it I guess.

build_files/build_environment/install_deps.sh

@@ -28,7 +28,7 @@ getopt \
 --long source:,install:,tmp:,threads:,help,with-all,with-opencollada,force-all,\
 force-python,force-numpy,force-boost,force-ocio,force-oiio,force-llvm,force-osl,force-opencollada,\
 force-ffmpeg,skip-python,skip-numpy,skip-boost,skip-ocio,skip-oiio,skip-llvm,skip-osl,skip-ffmpeg,\
-skip-opencollada,required-numpy \
+skip-opencollada,required-numpy,libyaml-cpp-ver: \
 -- "$@" \
 )
 
@@ -161,7 +161,11 @@ ARGUMENTS_INFO="\"COMMAND LINE ARGUMENTS:
 
     --required-numpy
         Use this in case your distro features a valid python package, but no matching Numpy one.
-        It will force compilation of both python 3.3 and numpy 1.7.\""
+        It will force compilation of both python 3.3 and numpy 1.7.
+
+    --libyaml-cpp-ver=<ver>
+        Ubuntu hack: you may have to force installation of a non-defaut version of libyaml-cpp
+        (e.g. ocio in trusty uses 0.3, while default version is 0.5... *sigh*)\""
 
 ##### Main Vars #####
 
@@ -190,6 +194,8 @@ OCIO_SOURCE="https://github.com/imageworks/OpenColorIO/tarball/v$OCIO_VERSION"
 OCIO_VERSION_MIN="1.0"
 OCIO_FORCE_REBUILD=false
 OCIO_SKIP=false
+LIBYAML_CPP_VER_DEFINED=false
+LIBYAML_CPP_VER="0.0"
 
 OPENEXR_VERSION="2.1.0"
 OPENEXR_VERSION_MIN="2.0.1"
@@ -423,6 +429,9 @@ while true; do
     --required-numpy)
       NUMPY_REQUIRED=true; shift; continue
     ;;
+    --libyaml-cpp-ver)
+      LIBYAML_CPP_VER_DEFINED=true; LIBYAML_CPP_VER="$2"; shift; shift; continue
+    ;;
     --)
       # no more arguments to parse
       break
@@ -1648,6 +1657,10 @@ install_DEB() {
   PRINT ""
   INFO "Installing dependencies for DEB-based distribution"
   PRINT ""
+  WARNING "Ubuntu users: Beware of Trusty!!!"
+  PRINT "Ubuntu 14.4 comes with a default libyaml-cpp in 0.5 version, while their ocio package still uses the 0.3 version"
+  PRINT "You have to use '--libyaml-cpp-ver=0.3' option (else Blender will builds with 0.5, and break when using packaged ocio)..."
+  PRINT ""
   PRINT "`eval _echo "$COMMON_INFO"`"
   PRINT ""
 
@@ -1697,10 +1710,23 @@ install_DEB() {
   OGG_USE=true
   THEORA_USE=true
 
+  PRINT "$LIBYAML_CPP_VER"
   # Some not-so-old distro (ubuntu 12.4) do not have it, do not fail in this case, just warn.
   YAMLCPP_DEV="libyaml-cpp-dev"
   check_package_DEB $YAMLCPP_DEV
   if [ $? -eq 0 ]; then
+    # Another Ubuntu hack - in 14.4, ocio uses (old) 0.3, while default is now 0.5... grrrrr.
+    if $LIBYAML_CPP_VER_DEFINED; then
+      YAMLCPP_VER_DEV="libyaml-cpp$LIBYAML_CPP_VER-dev"
+      check_package_DEB $YAMLCPP_VER_DEV
+      if [ $? -eq 0 ]; then
+        YAMLCPP_DEV=$YAMLCPP_VER_DEV
+      else
+        PRINT ""
+        WARNING "libyaml-cpp$LIBYAML_CPP_VER-dev not found!"
+        PRINT ""
+      fi
+    fi
     _packages="$_packages $YAMLCPP_DEV"
   else
     PRINT ""