In Ubuntu, we've applied the attached patch to achieve the following:
* debian/libgcroots0.symbols, debian/patches/aarch64.diff:
- Add AArch64 support.
We thought you might be interested in doing the same.
diff -Nru sigscheme-0.8.5/debian/libgcroots0.symbols
sigscheme-0.8.5/debian/libgcroots0.symbols
--- sigscheme-0.8.5/debian/libgcroots0.symbols 2014-04-16 14:42:14.000000000
+0200
+++ sigscheme-0.8.5/debian/libgcroots0.symbols 2015-01-26 18:05:31.000000000
+0100
@@ -5,7 +5,7 @@
GCROOTS_init@Base 0.8.5
GCROOTS_is_protected@Base 0.8.5
GCROOTS_is_protected_context@Base 0.8.5
- (arch=!mips !mipsel !mipsn32 !mipsn32el !mips64 !mips64el !s390
!s390x)GCROOTS_jmp_buf@Base 0.8.5
+ (arch=!mips !mipsel !mipsn32 !mipsn32el !mips64 !mips64el !s390 !s390x
!arm64)GCROOTS_jmp_buf@Base 0.8.5
GCROOTS_mark@Base 0.8.5
GCROOTS_noop1@Base 0.8.5
GCROOTS_push_current_stack@Base 0.8.5
diff -Nru sigscheme-0.8.5/debian/patches/aarch64.diff
sigscheme-0.8.5/debian/patches/aarch64.diff
--- sigscheme-0.8.5/debian/patches/aarch64.diff 1970-01-01 01:00:00.000000000
+0100
+++ sigscheme-0.8.5/debian/patches/aarch64.diff 2015-01-26 18:11:42.000000000
+0100
@@ -0,0 +1,76 @@
+From: Matthias Klose <d...@ubuntu.com>
+Description: Added AARCH64 support to gcconfig.h (libgcroots). It needs to get
symbols file updated, as well.
+Bug: https://groups.google.com/forum/#!topic/uim-en/fxixLmHXcq0
+Bug-Debian: http://bugs.debian.org/758710
+Origin: upstream,
https://github.com/ctyler/libgcroots/commit/da6e6884a1119e2cf6be88b4cf5eb9091c52beeb
+
+Index: b/libgcroots/include/private/gcconfig.h
+===================================================================
+--- a/libgcroots/include/private/gcconfig.h
++++ b/libgcroots/include/private/gcconfig.h
+@@ -62,6 +62,13 @@
+ # endif
+
+ /* Determine the machine type: */
++# if defined(__aarch64__)
++# define AARCH64
++# if !defined(LINUX)
++# define NOSYS
++# define mach_type_known
++# endif
++# endif
+ # if defined(__arm__) || defined(__thumb__)
+ # define ARM32
+ # if !defined(LINUX) && !defined(NETBSD)
+@@ -231,6 +238,10 @@
+ # define IA64
+ # define mach_type_known
+ # endif
++# if defined(LINUX) && defined(__aarch64__)
++# define AARCH64
++# define mach_type_known
++# endif
+ # if defined(LINUX) && defined(__arm__)
+ # define ARM32
+ # define mach_type_known
+@@ -504,6 +515,7 @@
+ /* running Amdahl UTS4 */
+ /* S390 ==> 390-like machine */
+ /* running LINUX */
++ /* AARCH64 ==> ARM AArch64 */
+ /* ARM32 ==> Intel StrongARM */
+ /* IA64 ==> Intel IPF */
+ /* (e.g. Itanium) */
+@@ -1724,6 +1736,32 @@
+ # endif
+ # endif
+
++# ifdef AARCH64
++# define CPP_WORDSZ 64
++# define MACH_TYPE "AARCH64"
++# define ALIGNMENT 8
++# ifndef HBLKSIZE
++# define HBLKSIZE 4096
++# endif
++# ifdef LINUX
++# define OS_TYPE "LINUX"
++# define LINUX_STACKBOTTOM
++# define USE_GENERIC_PUSH_REGS
++# define DYNAMIC_LOADING
++ extern int __data_start[];
++# define DATASTART ((ptr_t)__data_start)
++ extern char _end[];
++# define DATAEND ((ptr_t)(&_end))
++# endif
++# ifdef NOSYS
++ /* __data_start is usually defined in the target linker script. */
++ extern int __data_start[];
++# define DATASTART ((ptr_t)__data_start)
++ extern void *__stack_base__;
++# define STACKBOTTOM ((ptr_t)__stack_base__)
++# endif
++# endif
++
+ # ifdef ARM32
+ # define CPP_WORDSZ 32
+ # define MACH_TYPE "ARM32"
diff -Nru sigscheme-0.8.5/debian/patches/series
sigscheme-0.8.5/debian/patches/series
--- sigscheme-0.8.5/debian/patches/series 2014-04-16 14:36:19.000000000
+0200
+++ sigscheme-0.8.5/debian/patches/series 2015-01-26 18:03:57.000000000
+0100
@@ -7,3 +7,4 @@
test-gc-protect-0.8.5
add-ac-config-macro-dir-m4-0.8.5
support-automake-test-log-driver-0.8.5
+aarch64.diff
