add m68k support patches for all currently supported gcc versions

these are not complete/correct in that they do not account for ABI
variants (softfloat and coldfire fpu) in the dynamic linker name, but
I was unable to get gcc's configure to accept --with-float=soft on
m68k to test softfloat and begin figuring out how to do the spec
logic. at some point this needs to be figured out and completed, but
at least the default ABI is available in mcm now.

patches/gcc-5.2.0/0011-m68k.dff

@@ -0,0 +1,36 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-atomic.c gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c
+--- gcc-6.4.0/libgcc/config/m68k/linux-atomic.c	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c	2018-06-07 16:15:11.610163418 -0400
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state

patches/gcc-5.3.0/0011-m68k.dff

@@ -0,0 +1,36 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-atomic.c gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c
+--- gcc-6.4.0/libgcc/config/m68k/linux-atomic.c	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c	2018-06-07 16:15:11.610163418 -0400
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state

patches/gcc-6.2.0/0015-m68k.dff

@@ -0,0 +1,36 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-atomic.c gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c
+--- gcc-6.4.0/libgcc/config/m68k/linux-atomic.c	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c	2018-06-07 16:15:11.610163418 -0400
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state

patches/gcc-6.3.0/0015-m68k.dff

@@ -0,0 +1,36 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-atomic.c gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c
+--- gcc-6.4.0/libgcc/config/m68k/linux-atomic.c	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c	2018-06-07 16:15:11.610163418 -0400
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state

patches/gcc-6.4.0/0014-m68k.dff

@@ -0,0 +1,36 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-atomic.c gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c
+--- gcc-6.4.0/libgcc/config/m68k/linux-atomic.c	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-atomic.c	2018-06-07 16:15:11.610163418 -0400
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state

patches/gcc-7.2.0/0014-m68k.diff

@@ -0,0 +1,25 @@
+diff -ur gcc-6.4.0/gcc/config/m68k/linux.h gcc-6.4.0.new/gcc/config/m68k/linux.h
+--- gcc-6.4.0/gcc/config/m68k/linux.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/gcc/config/m68k/linux.h	2018-06-12 20:03:47.047502695 -0400
+@@ -73,6 +73,9 @@
+ 
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-m68k.so.1"
++
+ #undef LINK_SPEC
+ #define LINK_SPEC "-m m68kelf %{shared} \
+   %{!shared: \
+diff -ur gcc-6.4.0/libgcc/config/m68k/linux-unwind.h gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h
+--- gcc-6.4.0/libgcc/config/m68k/linux-unwind.h	2016-01-04 09:30:50.000000000 -0500
++++ gcc-6.4.0.new/libgcc/config/m68k/linux-unwind.h	2018-06-07 16:17:16.964591108 -0400
+@@ -37,7 +37,7 @@
+ 	stack_t		  uc_stack;
+ 	mcontext_t	  uc_mcontext;
+ 	unsigned long	  uc_filler[80];
+-	__sigset_t	  uc_sigmask;
++	sigset_t	  uc_sigmask;
+ };
+ 
+ #define MD_FALLBACK_FRAME_STATE_FOR m68k_fallback_frame_state