Add support for system based ninja

Adds system-ninja feature, which is enabled if
ninja is found in system path.

Change-Id: Icc58bc252d67a27f80c139349be28f9fd239108a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 12 insertions, 0 deletions

diff --git a/configure.pri b/configure.pri
new file mode 100644
index 000000000..dee7847b7
--- /dev/null
+++ b/configure.pri
@@ -0,0 +1,12 @@
+
+defineTest(qtConfTest_detectNinja) {
+    ninja = $$qtConfFindInPath("ninja")
+    !isEmpty(ninja) {
+        qtLog("Found ninja from path: $$ninja")
+        qtRunLoggedCommand("$$ninja --version", version)|return(false)
+        contains(version, "1.*"): return(true)
+        qtLog("Ninja version too old")
+    }
+    qtLog("Building own ninja")
+    return(false)
+}