[PATCH] gnu: gcj: remove broken symlink and stump binaries.

[Ricardo Wurmus]

This patch adds a build phase to GCJ removing a broken symlink and a
couple of non-functional binaries, such as "gcc" or "g++".

In a GCJ build these binaries are useless as GCJ is a GCC built only
with Java support.  When GCJ is installed alongside gcc-toolchain, for
example, there would be conflicts with GCJ's "gcc" stump binary
shadowing the usable "gcc" binary from gcc-toolchain.

Removing these binaries should be harmless as users of GCJ are unlikely
to use "gcc" but "gcj" directly.

>From 99b56cf4b17b1dbed7977dbce6e3c81fa4115aa7 Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <address@hidden>
Date: Thu, 30 Apr 2015 17:11:39 +0200
Subject: [PATCH] gnu: gcj: Remove broken symlink and conflicting files.

* gnu/packages/gcc.scm (gcj)[arguments]: Add a build phase to remove a broken
  symlink and generic stump binaries.
---
 gnu/packages/gcc.scm | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index e712e43..3ea65a9 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -435,7 +435,29 @@ Go.  It also includes runtime support libraries for these 
languages.")
                   (string-append jvm "/lib/tools.jar")))
                (chmod target #o755)
                #t))
-           ,phases))))))
+           (alist-cons-after
+            'install 'remove-broken-or-conflicting-files
+            (lambda _
+              (let ((out (assoc-ref %outputs "out")))
+                (for-each delete-file
+                          (map (cut string-append out <>)
+                               '("/lib/jvm/jre/lib/amd64/libjawt.so"
+                                 "/bin/c++"
+                                 "/bin/cpp"
+                                 "/bin/g++"
+                                 "/bin/gcc"
+                                 "/bin/gcc-ar"
+                                 "/bin/gcc-nm"
+                                 "/bin/gcc-ranlib"
+                                 "/bin/x86_64-unknown-linux-gnu-c++"
+                                 "/bin/x86_64-unknown-linux-gnu-g++"
+                                 "/bin/x86_64-unknown-linux-gnu-gcc"
+                                 "/bin/x86_64-unknown-linux-gnu-gcc-4.8.4"
+                                 "/bin/x86_64-unknown-linux-gnu-gcc-ar"
+                                 "/bin/x86_64-unknown-linux-gnu-gcc-nm"
+                                 "/bin/x86_64-unknown-linux-gnu-gcc-ranlib"))))
+              #t)
+            ,phases)))))))
 
 (define ecj-bootstrap-4.8
   (origin
-- 
2.1.0