coreutils/m4, branch master

build: fix build failure on AIX

2026-04-16T21:05:13Z

* m4/jm-macros.m4: AIX has a splice() function for TCP, so check for vmsplice() instead. * src/splice.h: Define HAVE_SPLICE if vmsplice available. Reported by Bruno Haible.

yes: use a zero-copy implementation via (vm)splice

2026-03-10T18:13:34Z

A good reference for the concepts used here is: https://mazzo.li/posts/fast-pipes.html We don't consider huge pages or busy loops here, but use vmsplice(), and splice() to get significant speedups: i7-5600U-laptop $ taskset 1 yes | taskset 2 pv > /dev/null ... [4.98GiB/s] i7-5600U-laptop $ taskset 1 src/yes | taskset 2 pv > /dev/null ... [34.1GiB/s] IBM,9043-MRX $ taskset 1 yes | taskset 2 pv > /dev/null ... [11.6GiB/s] IBM,9043-MRX $ taskset 1 src/yes | taskset 2 pv > /dev/null ... [175GiB/s] Also throughput to file (on BTRFS) was seen to increase significantly. With a Fedora 43 laptop improving from 690MiB/s to 1.1GiB/s. * bootstrap.conf: Ensure sys/uio.h is present. This was an existing transitive dependency. * m4/jm-macros.m4: Define HAVE_SPLICE appropriately. We assume vmsplice() is available if splice() is as they were introduced at the same time to Linux and glibc. * src/yes.c (repeat_pattern): A new function to efficiently duplicate a pattern in a buffer with memcpy calls that double in size. This also makes the setup for the existing write() path more efficient. (pipe_splice_size): A new function to increase the kernel pipe buffer if possible, and use an appropriately sized buffer based on that (25%). (splice_write): A new function to call vmplice() when outputting to a pipe, and also splice() if outputting to a non-pipe. * tests/misc/yes.sh: Verify the non-pipe output case, (main): Adjust to always calling write on the minimal buffer first, then trying vmsplice(), then falling back to write from bigger buffer. and the vmsplice() fallback to write() case. * NEWS: Mention the improvement.

maint: run 'make update-copyright'

2026-01-01T18:56:16Z

build: fix missing declarations on Android

2025-09-21T20:40:18Z

* configure.ac: Check for statx using gl_CHECK_FUNCS_ANDROID since it is hidden for Android API level <= 30. * m4/jm-macros.m4 (coreutils_MACROS): Check for syncfs using gl_CHECK_FUNCS_ANDROID since it is hidden for Android API level <= 28.

maint: assume long long int

2025-06-29T04:00:41Z

It’s long been safe to assume C99+ support for long long int. * .gitignore: Remove m4/longlong.m4. * bootstrap.conf (buildreq): Boost git prereq from 1.4.4 to 1.5.5, syncing with Gnulib. (bootstrap_post_import_hook): Remove m4/longlong.m4. * m4/jm-macros.m4 (gl_CHECK_ALL_TYPES): No need to require AC_TYPE_UNSIGNED_LONG_LONG_INT. * src/factor.c (DItype, UDItype): * src/od.c (main): Assume HAVE_LONG_LONG_INT. * src/od.c: (unsigned_long_long_int): Remove. All uses replaced with unsigned long long int.

maint: update all copyright year number ranges

2025-01-01T09:33:08Z

Update to latest gnulib with new copyright year. Run "make update-copyright" and then... * gnulib: Update included in this commit as copyright years are the only change from the previous gnulib commit. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Likewise. * tests/sample-test: Adjust to use the single most recent year.

build: modernize AC_CHECK_TYPE usage

2024-08-04T22:33:05Z

* m4/jm-macros.m4 (gl_CHECK_ALL_TYPES): Use current form of AC_CHECK_TYPE instead of the no-longer-documented obsolescent form.

maint: update all copyright year number ranges

2024-01-01T13:27:23Z

Update to latest gnulib with new copyright year. Run "make update-copyright" and then... * gnulib: Update included in this commit as copyright years are the only change from the previous gnulib commit. * tests/init.sh: Sync with gnulib to pick up copyright year. * bootstrap: Manually update copyright year, until we fully sync with gnulib at a later stage. * tests/sample-test: Adjust to use the single most recent year.

maint: omit some unused function tests

2023-09-23T07:28:27Z

* m4/jm-macros.m4: Do not check for ftruncate, iswspace, mkfifo, mbrlen, sysctl. Coreutils no longer uses the corresponding HAVE_* macros, typically because Gnulib handles them now. * src/wc.c (iswspace): Remove; unused.

maint: rely on Gnulib fdatasync

2023-08-31T03:32:13Z

* m4/jm-macros.m4: Remove fdatasync-related code, as Gnulib now does this. * src/dd.c (fdatasync) [!HAVE_FDATASYNC]: * src/shred.c (dosync) [!HAVE_FDATASYNC]: Rely on Gnulib fdatasync.