Dpkg::Shlibs: Remove support for GCC_TARGET environment variable

This was a temporary workaround for very old gcc toolchains.

See: #453267

debian/changelog

@@ -28,6 +28,8 @@ dpkg (1.18.0) UNRELEASED; urgency=low
     - Check perl code compilation, warnings and strictness.
   * Assume in Dpkg::Arch that the abitable is always present, and bump
     libdpkg-perl Depends on dpkg to 1.16.3, the version introducing the file.
+  * Remove support for GCC_TARGET environment variable from Dpkg::Shlibs.
+    This was a temporary workaround for very old gcc toolchains. See #453267.
 
  -- Guillem Jover <guillem@debian.org>  Tue, 09 Dec 2014 23:53:18 +0100
 

scripts/Dpkg/Shlibs.pm

@@ -80,10 +80,6 @@ sub setup_library_paths {
     my ($crossprefix, $multiarch);
 
     # Detect cross compiler builds.
-    if ($ENV{GCC_TARGET}) {
-        $crossprefix = debarch_to_gnutriplet($ENV{GCC_TARGET});
-        $multiarch = debarch_to_multiarch($ENV{GCC_TARGET});
-    }
     if ($ENV{DEB_TARGET_GNU_TYPE} and
         ($ENV{DEB_TARGET_GNU_TYPE} ne $ENV{DEB_BUILD_GNU_TYPE}))
     {