/usr/src/gcc-4.7/debian/patches/aarch64-multiarch.diff is in gcc-4.7-source 4.7.3-12ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | # DP: Define MULTIARCH_TUPLE for arm64.
--- a/src/gcc/config/aarch64/aarch64-linux.h
+++ b/src/gcc/config/aarch64/aarch64-linux.h
@@ -21,6 +21,14 @@
#ifndef GCC_AARCH64_LINUX_H
#define GCC_AARCH64_LINUX_H
+#define MULTIARCH_TUPLE "aarch64-linux-gnu"
+
+#undef STANDARD_STARTFILE_PREFIX_1
+#define STANDARD_STARTFILE_PREFIX_1 "/lib/" MULTIARCH_TUPLE "/"
+
+#undef STANDARD_STARTFILE_PREFIX_2
+#define STANDARD_STARTFILE_PREFIX_2 "/usr/lib/" MULTIARCH_TUPLE "/"
+
#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-aarch64.so.1"
#define LINUX_TARGET_LINK_SPEC "%{h*} \
--- a/src/gcc/config/aarch64/t-aarch64-linux
+++ b/src/gcc/config/aarch64/t-aarch64-linux
@@ -20,3 +20,5 @@
LIB1ASMSRC = aarch64/lib1funcs.asm
LIB1ASMFUNCS = _aarch64_sync_cache_range
+
+MULTIARCH_DIRNAME = $(call if_multiarch,aarch64-linux-gnu)
|