Enable calling commands with : in argv[1] (#9963)

The solution seems hackish, but it works: for
NMake only, prepend a no-op command before each
real command that begins with ".

This is really a work-around for an NMake problem.
When a command begins with ", nmake truncates the
first argument to the command after the first :
in that arg. It has a parsing problem.

Workaround..., hackish..., but it should solve
the issue for #9963 and its related friends.

Also, modify the CustomCommand test to replicate
the problem reported in issue #9963. Before the
NMake specific code change, the test failed.
Now, it passes. Ahhhhhh.

1 files changed, 9 insertions, 2 deletions

diff --git a/Source/cmLocalUnixMakefileGenerator3.cxx b/Source/cmLocalUnixMakefileGenerator3.cxx
index 004d19a..f04d0a0 100644
--- a/Source/cmLocalUnixMakefileGenerator3.cxx
+++ b/Source/cmLocalUnixMakefileGenerator3.cxx
@@ -1062,9 +1062,16 @@ cmLocalUnixMakefileGenerator3
             }
           }
         }
-      if (useCall && launcher.empty())
+      if (launcher.empty())
         {
-        cmd = "call " + cmd;
+        if (useCall)
+          {
+          cmd = "call " + cmd;
+          }
+        else if (this->NMake && cmd[0]=='"')
+          {
+          cmd = "echo >nul && " + cmd;
+          }
         }
       commands1.push_back(cmd);
       }