[oe] [PATCH] llvm: make llvm-config wrapper error message more understandable

[Ross Burton]

The llvm-config wrapper has an error message that is quite abrupt, expand it so
it helps the user.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta-oe/recipes-core/llvm/llvm-common/llvm-config | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/meta-oe/recipes-core/llvm/llvm-common/llvm-config b/meta-oe/recipes-core/llvm/llvm-common/llvm-config
index a9a416d..b0f33c8 100644
--- a/meta-oe/recipes-core/llvm/llvm-common/llvm-config
+++ b/meta-oe/recipes-core/llvm/llvm-common/llvm-config
@@ -4,7 +4,8 @@
 if [ $WANT_LLVM_RELEASE ]; then
 	exec `dirname $0`/${TARGET_PREFIX}llvm-config$WANT_LLVM_RELEASE ${@}
 else
-  echo "The variable WANT_LLVM_RELEASE is not defined and exported"
-	echo "by your build recipe. Go figure."
-  exit 1
+	echo "To use llvm-common WANT_LLVM_RELEASE needs to be exported."
+	echo "For example if this is being called through a recipe:"
+	echo "export WANT_LLVM_RELEASE=\"3.3\""
+	exit 1
 fi
-- 
2.8.0.rc3