sbcl: build with ecl on musl.

The patches were taken from Alpine Linux.

srcpkgs/sbcl/patches/fix-arm-build-ecl.patch

@@ -0,0 +1,36 @@
+#2020/01/30 Patch has not yet been accepted upstream
+From f4de7a2a21acf1a205b725b4bb5596e1475bad26 Mon Sep 17 00:00:00 2001
+From: Eric Timmons <etimmons@mit.edu>
+Date: Sun, 8 Dec 2019 14:00:01 -0500
+Subject: [PATCH] Fix ARM build using ECL host
+
+ECL appears to not like ~T nested in ~<, even when it's the first argument. So
+replace the ~9T that gets triggered during build with spaces.
+---
+ src/compiler/checkgen.lisp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/compiler/checkgen.lisp b/src/compiler/checkgen.lisp
+index a49a0a1fc..026782327 100644
+--- src/compiler/checkgen.lisp
++++ src/compiler/checkgen.lisp
+@@ -518,14 +518,14 @@ (defun cast-check-uses (cast)
+         (cond ((and (ref-p use) (constant-p (ref-leaf use)))
+                (warn condition
+                      :format-control "~:[This~;~:*~A~] is not a ~
+-                       ~<~%~9T~:;~/sb-impl:print-type/:~>~% ~S"
++                       ~<~%        ~:;~/sb-impl:print-type/:~>~% ~S"
+                      :format-arguments
+                      (list what atype (constant-value (ref-leaf use)))))
+               (t
+                (warn condition
+                      :format-control
+                       "~:[Result~;~:*~A~] is a ~/sb-impl:print-type/, ~
+-                       ~<~%~9T~:;not a ~/sb-impl:print-type/.~>"
++                       ~<~%        ~:;not a ~/sb-impl:print-type/.~>"
+                      :format-arguments (list what dtype atype)))))))
+   (values))
+ 
+-- 
+2.24.0
+

srcpkgs/sbcl/patches/only-use-memcpy-version-on-glibc.patch

@@ -0,0 +1,27 @@
+#2020/01/30 Patch has not yet been accepted upstream
+From 5d7395cbd4eb952d4a988c4ee7ee3f5111a9f5a7 Mon Sep 17 00:00:00 2001
+From: Eric Timmons <etimmons@mit.edu>
+Date: Sat, 1 Feb 2020 17:34:10 -0500
+Subject: [PATCH 4/5] Only include old memcpy version on glibc
+
+---
+ src/runtime/memcpy.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/src/runtime/memcpy.h b/src/runtime/memcpy.h
+index a99c5fb7e..e3d104e3a 100644
+--- src/runtime/memcpy.h
++++ src/runtime/memcpy.h
+@@ -1,3 +1,4 @@
++#ifdef __GLIBC__
+ #ifdef __linux__
+ #ifdef __amd64__
+ #ifdef __ASSEMBLER__
+@@ -14,3 +15,4 @@ __asm__(".symver memcpy,memcpy@GLIBC_2.0");
+ #endif
+ #endif
+ #endif
++#endif
+-- 
+2.25.0
+

srcpkgs/sbcl/template

@@ -38,8 +38,8 @@ x86_64-musl)
 	broken="https://build.voidlinux.org/builders/x86_64-musl_builder/builds/31173/steps/shell_3/logs/stdio"
 	;;
 *-musl)
-	makedepends+=" ccl"
-	_bootstrap_lisp="ccl --batch --quiet --no-init"
+	makedepends+=" ecl"
+	_bootstrap_lisp="ecl"
 	;;
 esac