[Mesa-stable] [PATCH 5/7] configure.ac: add llvm_add_optional_component helper

[Emil Velikov]

From: Emil Velikov <emil.velikov at collabora.com>

We want to add "optional" components, which have been added with later
LLVM versions.

One such in-tree example is inteljitevents. Others are to follow
shortly.

Cc: mesa-stable at lists.freedesktop.org
Cc: Tobias Droste <tdroste at gmx.de>
Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
---
Tobias, any preference if we keep this separate helperor fold it with
llvm_add_component?

Should we fold the llvm_add_default_components usecase here, or keep it
separate patch.
---
 configure.ac | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index dbaa6569e4e..56cbf26c778 100644
--- a/configure.ac
+++ b/configure.ac
@@ -955,6 +955,14 @@ llvm_add_component() {
     fi
 }
 
+llvm_add_optional_component() {
+    new_llvm_component=$1
+    driver_name=$2
+
+    if $LLVM_CONFIG --components | grep -iqw $new_llvm_component ; then
+        LLVM_COMPONENTS="${LLVM_COMPONENTS} ${new_llvm_component}"
+    fi
+}
 llvm_add_default_components() {
     driver_name=$1
 
@@ -965,9 +973,7 @@ llvm_add_default_components() {
     llvm_add_component "mcjit" $driver_name
 
     # Optional default components
-    if $LLVM_CONFIG --components | grep -iqw inteljitevents ; then
-        LLVM_COMPONENTS="$LLVM_COMPONENTS inteljitevents"
-    fi
+    llvm_add_component "inteljitevents" $driver_name
 }
 
 llvm_add_target() {
-- 
2.14.1