Correct iOS GN hermetic support.

build/toolchain/mac/linker_driver.py

Index: build/toolchain/mac/linker_driver.py
diff --git a/build/toolchain/mac/linker_driver.py b/build/toolchain/mac/linker_driver.py
index a6024f5ae2a39463968b59f4ef38ba08064f9a7d..d7804b1e71eb8e7f0af0498de26e77fa90d4f274 100755
--- a/build/toolchain/mac/linker_driver.py
+++ b/build/toolchain/mac/linker_driver.py
@@ -52,6 +52,11 @@ def Main(args):
   if len(args) < 2:
     raise RuntimeError("Usage: linker_driver.py [linker-invocation]")
 
+  if args[1] == "--developer_dir":
+    os.environ['DEVELOPER_DIR'] = args[2]
+    del args[2]

[justincohen, 2016/10/26 00:36:48]

I didn't want to change linker_driver to something like argparse.  What do you
think here?

[sdefresne, 2016/10/26 15:33:07]

Can you instead iterate over the arguments then?

for i in xrange(len(args)):
  if args[i] != '--developer_dir':
    continue
  os.environ['DEVELOPER_DIR'] = args[i + 1]
  del args[i:i+2]
  break

[justincohen, 2016/10/27 13:36:39]

Done.

+    del args[1]
+
   # Collect arguments to the linker driver (this script) and remove them from
   # the arguments being passed to the compiler driver.
   linker_driver_actions = {}