Apple tools use arm64-* in their triples to indicate an aarch64 CPU.
E.g. macOS 11.0 on aarch64 is `arm64-apple-darwin20.0.0`. That said,
these tools do accept the `aarch64-*` just fine as well (LLVM
normalizes internally). For config.sub, I think it makes sense to
normalize arm64-* to aarch64-*, since the latter is the established
way to refer to this architecture and likely what various configure
scripts, etc. are checking for. I tried this change on a few
autotools-based projects with `--build=arm64-apple-darwin` and
the builds seemed to go through well.
---
ChangeLog | 4 ++++
config.sub | 3 +++
testsuite/config-sub.data | 2 ++
3 files changed, 9 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index c787ce9..f995b31 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2020-07-09 Keno Fischer <k...@juliacomputing.com>
+
+ * config.sub: Normalize arm64-* to aarch64-*
+
2020-06-28 John Ericson <john.ericson@obsidian.systems>
* config.sub: Properly parse the KERNEL-OS case.
diff --git a/config.sub b/config.sub
index ce89d5c..0634942 100755
--- a/config.sub
+++ b/config.sub
@@ -1104,6 +1104,9 @@ case $cpu-$vendor in
xscale-* | xscalee[bl]-*)
cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
;;
+ arm64-*)
+ cpu=aarch64
+ ;;
# Recognize the canonical CPU Types that limit and/or modify the
# company names they are paired with.
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index d9639bc..197fffc 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -103,6 +103,8 @@ armv8a
armv8a-unknown-none
armv8b-linux-gnueabi armv8b-unknown-linux-gnueabi
armv8m armv8m-unknown-none
armv8r armv8r-unknown-none
+arm64-apple-darwin20.0.0 aarch64-apple-darwin20.0.0
+arm64-apple-ios aarch64-apple-ios
aros i386-pc-aros
asmjs asmjs-unknown-none
asmjs-emscripten asmjs-unknown-emscripten
--
2.25.1
