Work around MinGW-make's magic prefixing of paths.

When building QNX on MS-Windows, make magically adds the Msys root as
prefix to variables whose values look like paths; this applies to both
environment variables and variables given values on the command-line.
When we don't actually want to install under the Msys root, this is
unwelcome "help".  So (for MinGW's make) support a magic prefix of our
own, @msyshack@, that'll make a path value for INSTALL_ROOT not look
like a path to make; we can then strip it off when we come to use it.

Change-Id: I951ad3c8fe3e5cfb49e6e361d7fff779f3a9d716
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/qmake/generators/makefile.cpp b/qmake/generators/makefile.cpp
index a54083c04d..4dfe69fbde 100644
--- a/qmake/generators/makefile.cpp
+++ b/qmake/generators/makefile.cpp
@@ -1212,7 +1212,7 @@ MakefileGenerator::writeInstalls(QTextStream &t, bool noBuild)
         }
 
         bool do_default = true;
-        const QString root = "$(INSTALL_ROOT)";
+        const QString root = installRoot();
         QString dst;
         if (installConfigValues.indexOf("no_path") == -1 &&
             installConfigValues.indexOf("dummy_install") == -1) {