diff options
Diffstat (limited to 'm4/copy-file-range.m4')
| -rw-r--r-- | m4/copy-file-range.m4 | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/m4/copy-file-range.m4 b/m4/copy-file-range.m4 index b5d7a03a03a..443e598ba55 100644 --- a/m4/copy-file-range.m4 +++ b/m4/copy-file-range.m4 @@ -1,4 +1,4 @@ -# copy-file-range.m4 +# copy-file-range.m4 serial 5 dnl Copyright 2019-2024 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -17,43 +17,42 @@ AC_DEFUN([gl_FUNC_COPY_FILE_RANGE], dnl Programs that use copy_file_range must fall back on read+write dnl anyway, and there's little point to substituting the Gnulib stub dnl for a glibc stub. - AC_CACHE_CHECK([for copy_file_range], [gl_cv_func_copy_file_range], - [AC_LINK_IFELSE( - [AC_LANG_PROGRAM( - [[#include <unistd.h> - ]], - [[ssize_t (*func) (int, off_t *, int, off_t *, size_t, unsigned) - = copy_file_range; - return func (0, 0, 0, 0, 0, 0) & 127; - ]]) - ], - [gl_cv_func_copy_file_range=yes], - [gl_cv_func_copy_file_range=no]) - ]) - + case "$host_os" in + *-gnu* | gnu*) + AC_CACHE_CHECK([for copy_file_range], [gl_cv_func_copy_file_range], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <unistd.h> + ]], + [[ssize_t (*func) (int, off_t *, int, off_t *, size_t, unsigned) + = copy_file_range; + return func (0, 0, 0, 0, 0, 0) & 127; + ]]) + ], + [gl_cv_func_copy_file_range=yes], + [gl_cv_func_copy_file_range=no]) + ]) + gl_cv_onwards_func_copy_file_range="$gl_cv_func_copy_file_range" + ;; + *) + gl_CHECK_FUNCS_ANDROID([copy_file_range], [[#include <unistd.h>]]) + gl_cv_func_copy_file_range="$ac_cv_func_copy_file_range" + ;; + esac if test "$gl_cv_func_copy_file_range" != yes; then HAVE_COPY_FILE_RANGE=0 + case "$gl_cv_onwards_func_copy_file_range" in + future*) REPLACE_COPY_FILE_RANGE=1 ;; + esac else AC_DEFINE([HAVE_COPY_FILE_RANGE], 1, [Define to 1 if the function copy_file_range exists.]) case $host_os in linux*) - AC_CACHE_CHECK([whether copy_file_range is known to work], - [gl_cv_copy_file_range_known_to_work], - [AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM( - [[#include <linux/version.h> - ]], - [[#if LINUX_VERSION_CODE < KERNEL_VERSION (5, 3, 0) - #error "copy_file_range is buggy" - #endif - ]])], - [gl_cv_copy_file_range_known_to_work=yes], - [gl_cv_copy_file_range_known_to_work=no])]) - if test "$gl_cv_copy_file_range_known_to_work" = no; then - REPLACE_COPY_FILE_RANGE=1 - fi;; + # See copy-file-range.c comment re pre-5.3 Linux kernel bugs. + # We should be able to remove this hack in 2025. + REPLACE_COPY_FILE_RANGE=1;; esac fi ]) |