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deps: the libavr pin advances, and the tiny85 image grows 24 B

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The growth is not this bump's. It entered at libavr 32f8167, where the
software master started clocking the rate it is told: the phase padding has to
cover the shortest bit of a byte, and paying for it costs `shift_out` and
`read_acked` twelve bytes each on the tiny85. Those two symbols are the whole
of the move - an avr-nm diff across the two images names them and nothing else.

So the claim went unheld through two pin bumps. 1246 B was last measured at
libavr e697920; the tiny85 preset has read 1270 since 32f8167, which both
5a042a9 and f2205a7 pinned past without re-recording it. The number is stated
in test/CMakeLists.txt and in README.md, and this is what keeps them one fact -
a check that only ever ran on one of the two chips keeps neither.

The suite also stops depending on its host: libavr's launcher and skip marker
register every check everywhere, and one this machine cannot run reads as
Skipped rather than going missing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
BlackMark
2026-09-02 18:00:31 +02:00
parent f2205a7c53
commit d778383d88
3 changed files with 9 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
README.md
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@@ -27,7 +27,7 @@ cmake --build --preset attiny85-generated
Presets cover attiny85/atmega328p in both libavr modes (generated and Presets cover attiny85/atmega328p in both libavr modes (generated and
reflect); `ctest` runs the consteval battery over the BCD, the hours reflect); `ctest` runs the consteval battery over the BCD, the hours
register's two formats, the weekday and the alarm rate encodings, and holds register's two formats, the weekday and the alarm rate encodings, and holds
the example to its stated size — **1480 B** on the mega328P and **1246 B** the example to its stated size — **1480 B** on the mega328P and **1270 B**
on the tiny85, byte-identical across the two modes. The legacy on the tiny85, byte-identical across the two modes. The legacy
yazoalfa-based driver lives on the `master` branch. yazoalfa-based driver lives on the `master` branch.

2
libavr

Submodule libavr updated: b62d6b5b30...8521f48a33

8
test/CMakeLists.txt
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@@ -5,7 +5,7 @@ libavr_format_test()
if(LIBAVR_MCU STREQUAL "atmega328p") if(LIBAVR_MCU STREQUAL "atmega328p")
libavr_size_claim_test(clock 1480) libavr_size_claim_test(clock 1480)
elseif(LIBAVR_MCU STREQUAL "attiny85") elseif(LIBAVR_MCU STREQUAL "attiny85")
libavr_size_claim_test(clock 1246) libavr_size_claim_test(clock 1270)
endif() endif()
# The README says the two modes emit the same image, and only a tree with # The README says the two modes emit the same image, and only a tree with
@@ -19,3 +19,9 @@ target_link_libraries(consteval_tests PRIVATE ds3231)
add_test(NAME ds3231.consteval add_test(NAME ds3231.consteval
COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target consteval_tests) COMMAND ${CMAKE_COMMAND} --build ${CMAKE_BINARY_DIR} --target consteval_tests)
# A check this host cannot run reads as Skipped rather than Failed: the marker
# a stubbed launcher prints, over every test registered here. Nothing in this
# suite is host-gated today, and this is what keeps that a property of the
# suite rather than of whoever adds the next check.
libavr_skip_unverified()