Add arm64 support
This patch adds `--config=arm64` and `--cpu=arm64` flags for users to
compile for the 64-bit version of the Raspberry Pi.
The existing 32-bit ARM build should still work. This patch only adds
additional 64-bit capabilities. Future patches can remove 32-bit
support.
Eigen needed some tweaks because we have `LDBL_MANT_DIG` of 113 on
arm64. None of the code paths that used the parameters `U` and `V`
actually gets compiled in. Adding `[[maybe_unused]]` fixed the error.
Signed-off-by: Philipp Schrader <philipp.schrader@gmail.com>
Change-Id: Ibf919b2964fe971769449a1c556c13e3bf1d48e9
diff --git a/tools/cpp/BUILD b/tools/cpp/BUILD
index 6ff661a..bac0c0b 100644
--- a/tools/cpp/BUILD
+++ b/tools/cpp/BUILD
@@ -7,6 +7,7 @@
toolchains = {
"k8": "@llvm_toolchain//:cc-clang-x86_64-linux",
"armv7": "@llvm_toolchain//:cc-clang-armv7-linux",
+ "arm64": "@llvm_toolchain//:cc-clang-aarch64-linux",
"roborio": ":cc-compiler-roborio",
"cortex-m4f": ":cc-compiler-cortex-m4f",
"rp2040": ":cc-compiler-rp2040",