From 12cfd10e6a3638195b4c69c1b251327e338964cb Mon Sep 17 00:00:00 2001
From: Samuel Longchamps <memophysic@gmail.com>
Date: Fri, 25 Dec 2020 13:34:49 -0800
Subject: [PATCH] Fix network path output in ninja backend on Windows

---
 mesonbuild/backend/ninjabackend.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/mesonbuild/backend/ninjabackend.py b/mesonbuild/backend/ninjabackend.py
index 40d4ae3e5..b9be80ff4 100644
--- a/mesonbuild/backend/ninjabackend.py
+++ b/mesonbuild/backend/ninjabackend.py
@@ -374,6 +374,13 @@ class NinjaBuildElement:
         # do not require quoting, unless explicitly specified, which is necessary for
         # the csc compiler.
         line = line.replace('\\', '/')
+        if mesonlib.is_windows():
+            # Support network paths as backslash, otherwise they are interpreted as
+            # arguments for compile/link commands when using MSVC
+            line = ' '.join(
+                (l.replace('//', '\\\\', 1) if l.startswith('//') else l)
+                for l in line.split(' ')
+            )
         outfile.write(line)
 
         if use_rspfile: