diff --git a/README.md b/README.md index 37d3f622f..5f5cc5cb1 100644 --- a/README.md +++ b/README.md @@ -169,9 +169,10 @@ As mentioned above, this is currently a two-step process: Updating tzdata --------------- -This is fully automated: +This is fully automated (and these days handled by the libcore team, because +they own icu, and that needs to be updated in sync with bionic): - 1. Run update-tzdata.py. + 1. Run update-tzdata.py in external/icu/tools/. Verifying changes @@ -268,18 +269,22 @@ However, this also makes it difficult to run the tests under GDB. To prevent each test from being forked, run the tests with the flag `--no-isolate`. -LP32 ABI bugs -------------- +32-bit ABI bugs +--------------- This probably belongs in the NDK documentation rather than here, but these -are the known ABI bugs in LP32: +are the known ABI bugs in the 32-bit ABI: - * `time_t` is 32-bit. + * `time_t` is 32-bit. . In the 64-bit ABI, time_t is + 64-bit. - * `off_t` is 32-bit. There is `off64_t`, but no `_FILE_OFFSET_BITS` support. - Many of the `off64_t` functions are missing in older releases, and - stdio uses 32-bit offsets, so there's no way to fully implement - `_FILE_OFFSET_BITS`. + * `off_t` is 32-bit. There is `off64_t`, and in newer releases there is + almost-complete support for `_FILE_OFFSET_BITS`. Unfortunately our stdio + implementation uses 32-bit offsets and -- worse -- function pointers to + functions that use 32-bit offsets, so there's no good way to implement + the last few pieces . In the 64-bit ABI, off_t is + off64_t. * `sigset_t` is too small on ARM and x86 (but correct on MIPS), so support - for real-time signals is broken. + for real-time signals is broken. In the 64-bit ABI, + `sigset_t` is the correct size for every architecture.