gnu: Fix definitions of gcc-toolchain-4.8 and gcc-toolchain-4.9.

* gnu/packages/commencement.scm (gcc-toolchain-4.8): Use gcc-4.8,
not gcc-final.
(gcc-toolchain-4.9): Use gcc-final, not gcc-4.9.
* gnu/packages/gcc.scm (gcc): Add reminder comment for the future.

2 files changed, 4 insertions, 2 deletions

diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
index 80a83aa73b..6dfe5c9cb7 100644
--- a/gnu/packages/commencement.scm
+++ b/gnu/packages/commencement.scm
@@ -871,10 +871,10 @@ and binaries, plus debugging symbols in the 'debug' output), and Binutils.")
               ("libc-debug" ,glibc-final "debug")))))
 
 (define-public gcc-toolchain-4.8
-  (gcc-toolchain gcc-final))
+  (gcc-toolchain gcc-4.8))
 
 (define-public gcc-toolchain-4.9
-  (gcc-toolchain gcc-4.9))
+  (gcc-toolchain gcc-final))
 
 (define-public gcc-toolchain-5
   (gcc-toolchain gcc-5))
diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index 73c6d488fb..1df5150ab3 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -354,6 +354,8 @@ Go.  It also includes runtime support libraries for these languages.")
                 "1ny4smkp5bzs3cp8ss7pl6lk8yss0d9m4av1mvdp72r1x695akxq"))
               (patches (list (search-patch "gcc-5.0-libvtv-runpath.patch")))))))
 
+;; Note: When changing the default gcc version, update
+;;       the gcc-toolchain-* definitions accordingly.
 (define-public gcc gcc-4.9)
 
 (define-public (make-libstdc++ gcc)