gnu: Add propeller-gcc-4.

* gnu/packages/embedded.scm (propeller-gcc-4): New variable.
* gnu/packages/patches/gcc-4.6-gnu-inline.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

gnu/local.mk

@@ -606,6 +606,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/gcc-cross-environment-variables.patch	\
   %D%/packages/patches/gcc-libvtv-runpath.patch			\
   %D%/packages/patches/gcc-strmov-store-file-names.patch	\
+  %D%/packages/patches/gcc-4.6-gnu-inline.patch			\
   %D%/packages/patches/gcc-4.9.3-mingw-gthr-default.patch	\
   %D%/packages/patches/gcc-5.0-libvtv-runpath.patch		\
   %D%/packages/patches/gcc-5-source-date-epoch-1.patch		\

gnu/packages/embedded.scm

@@ -488,6 +488,28 @@ (define-public propeller-gcc
       (home-page "https://github.com/totalspectrum/gcc-propeller")
       (synopsis "GCC for the Parallax Propeller"))))
 
+(define-public propeller-gcc-4
+  (let ((xgcc propeller-gcc)
+        (commit "f1b01001b760d691a91ff1db4830d41bb712557f")
+        (revision "1"))
+    (package (inherit xgcc)
+      (name "propeller-gcc")
+      (version (string-append "4.6.1-" revision "." (string-take commit 9)))
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/dbetz/propgcc-gcc.git")
+                      (commit commit)))
+                (file-name (string-append name "-" commit "-checkout"))
+                (sha256
+                 (base32
+                  "15mxrhk2v4vqmdkvcqy33ag1wrg9x9q20kx2w33kkw8pkrijknbi"))
+                (patches
+                 (append
+                  (origin-patches (package-source gcc-4.7))
+                  (search-patches "gcc-4.6-gnu-inline.patch")))))
+      (home-page "https://github.com/dbetz/propgcc-gcc"))))
+
 ;; There is no release, so we take the latest version as referenced from here:
 ;; https://github.com/dbetz/propeller-gcc
 (define-public proplib

gnu/packages/patches/gcc-4.6-gnu-inline.patch

@@ -0,0 +1,65 @@
+This patch was taken from https://gcc.gnu.org/ml/gcc-patches/2015-08/msg00375.html.
+It is used by propeller-gcc-4.
+
+Since the 3.0.3 release of gperf (made in May 2007), the generated func
+has had the gnu_inline attribute applied to it.  The gcc source however
+has not been updated to include that which has lead to a mismatch.
+
+In practice, this hasn't been an issue for two reasons:
+(1) Before gcc-5, the default standard was (gnu) C89, and gcc does not
+warn or throw an error in this mode.
+(2) Starting with gcc-4.8, the compiler driver used to build gcc was
+changed to C++, and g++ does not warn or throw an error in this mode.
+
+This error does show up though when using gcc-5 to build gcc-4.7 or
+older as then the default is (gnu) C11 and the C compiler driver is
+used.  That failure looks like:
+In file included from .../gcc-4.7.4/gcc/cp/except.c:990:0:
+cfns.gperf: At top level:
+cfns.gperf:101:1: error: 'gnu_inline' attribute present on 'libc_name_p'
+cfns.gperf:26:14: error: but not here
+
+Whether the compiler should always emit this error regardless of the
+active standard or compiler driver is debatable (I think it should be
+consistent -- either always do it or never do it).
+
+2015-08-06  Mike Frysinger  <vapier@gentoo.org>
+
+	* cfns.gperf [__GNUC__, __GNUC_STDC_INLINE__]: Apply the
+	__gnu_inline__ attribute.
+	* cfns.h: Regenerated.
+---
+ gcc/cp/cfns.gperf | 3 +++
+ gcc/cp/cfns.h     | 3 +++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/gcc/cp/cfns.gperf b/gcc/cp/cfns.gperf
+index 68acd3d..953262f 100644
+--- a/gcc/cp/cfns.gperf
++++ b/gcc/cp/cfns.gperf
+@@ -22,6 +22,9 @@ __inline
+ static unsigned int hash (const char *, unsigned int);
+ #ifdef __GNUC__
+ __inline
++#ifdef __GNUC_STDC_INLINE__
++__attribute__ ((__gnu_inline__))
++#endif
+ #endif
+ const char * libc_name_p (const char *, unsigned int);
+ %}
+diff --git a/gcc/cp/cfns.h b/gcc/cp/cfns.h
+index 1c6665d..6d00c0e 100644
+--- a/gcc/cp/cfns.h
++++ b/gcc/cp/cfns.h
+@@ -53,6 +53,9 @@ __inline
+ static unsigned int hash (const char *, unsigned int);
+ #ifdef __GNUC__
+ __inline
++#ifdef __GNUC_STDC_INLINE__
++__attribute__ ((__gnu_inline__))
++#endif
+ #endif
+ const char * libc_name_p (const char *, unsigned int);
+ /* maximum key range = 391, duplicates = 0 */
+-- 
+2.4.4