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packaging: cross-compile for the FP6's own cores

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The phone is one SoC, 4x Cortex-A520 + 4x Cortex-A720, and the package is
built for nothing else, so build for it: -march=armv8.6-a+fp16fml+aes+sha3+sm4
-mtune=cortex-a720 instead of the generic Armv8 baseline, for the daemon, the
agent and libqcomtee alike. That is gcc's own -march=native expansion on the
phone, re-based on armv8.6-a so clang can express the same set; 8.6 is the
highest level whose mandatory set the phone exposes (8.7 would assume WFxT,
9.x SVE2 - neither is in its hwcaps, and SVE2 code would SIGILL). Same string
as the fp6-img aports and kernel.
This commit is contained in:
Jorijn van der Graaf 2026-09-05 23:06:57 +02:00
commit 7a0a86a7f0
2 changed files with 9 additions and 4 deletions
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4
README.md
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@ -19,8 +19,8 @@ Cross-compiling for the phone:
```sh
packaging/make-sysroot.sh
crafter-build -- --target=aarch64-alpine-linux-musl --sysroot=~/.cache/fingerprintd/sysroot-aarch64-alpine --march=armv8-a --mtune=generic
crafter-build test --target=aarch64-alpine-linux-musl --sysroot=~/.cache/fingerprintd/sysroot-aarch64-alpine --march=armv8-a --mtune=generic
crafter-build -- --target=aarch64-alpine-linux-musl --sysroot=~/.cache/fingerprintd/sysroot-aarch64-alpine --march=armv8.6-a+fp16fml+aes+sha3+sm4 --mtune=cortex-a720
crafter-build test --target=aarch64-alpine-linux-musl --sysroot=~/.cache/fingerprintd/sysroot-aarch64-alpine --march=armv8.6-a+fp16fml+aes+sha3+sm4 --mtune=cortex-a720
```
Verified on the device: all five suites pass cross-built and run on the phone

9
packaging/build-package.sh
View file

@ -76,13 +76,18 @@ retry "make sysroot" "$SRC/packaging/make-sysroot.sh" "$SYSROOT"
# under ~/.cache/fingerprintd/libqcomtee-<target>, which is this script's
# default output dir. Needs git, installed above.
retry "make libqcomtee" "$SRC/packaging/make-libqcomtee.sh" \
--target=aarch64-alpine-linux-musl --sysroot="$SYSROOT" --march=armv8-a
--target=aarch64-alpine-linux-musl --sysroot="$SYSROOT" --march=armv8.6-a+fp16fml+aes+sha3+sm4
# --- cross-compile the daemon; run the suites natively. The core is portable
# by construction (no GLib, no libqcomtee, no system headers), which is what
# lets the wire formats and state machines be tested on the build host at all.
cd "$SRC"
XTARGET="--target=aarch64-alpine-linux-musl --sysroot=$SYSROOT --march=armv8-a --mtune=generic"
# The phone is one SoC, 4x Cortex-A520 + 4x Cortex-A720, so build for it (the
# same -march goes to libqcomtee above). armv8.6-a is the highest level whose
# mandatory set it exposes (8.7 would assume WFxT, 9.x SVE2 - neither is in
# its hwcaps); +fp16fml+aes+sha3+sm4 are the optional extensions it has. Same
# string as the fp6-img aports.
XTARGET="--target=aarch64-alpine-linux-musl --sysroot=$SYSROOT --march=armv8.6-a+fp16fml+aes+sha3+sm4 --mtune=cortex-a720"
crafter-build -- $XTARGET
crafter-build -- --product=agent $XTARGET
crafter-build test