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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:16:34 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:16:34 +0000 |
commit | a398d2c2b5fd6ab0545d8bb019f9a970b2309404 (patch) | |
tree | 272fc7ab226258d7ceddee12c8c682c8e711c2b0 /m4/usleep.m4 | |
parent | Initial commit. (diff) | |
download | parted-a398d2c2b5fd6ab0545d8bb019f9a970b2309404.tar.xz parted-a398d2c2b5fd6ab0545d8bb019f9a970b2309404.zip |
Adding upstream version 3.6.upstream/3.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/usleep.m4')
-rw-r--r-- | m4/usleep.m4 | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/m4/usleep.m4 b/m4/usleep.m4 new file mode 100644 index 0000000..d904224 --- /dev/null +++ b/m4/usleep.m4 @@ -0,0 +1,51 @@ +# usleep.m4 serial 8 +dnl Copyright (C) 2009-2023 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl This macro intentionally does not check for select or nanosleep; +dnl both of those modules can require external libraries. +AC_DEFUN([gl_FUNC_USLEEP], +[ + AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) + dnl usleep was required in POSIX 2001, but dropped as obsolete in + dnl POSIX 2008; therefore, it is not always exposed in headers. + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CHECK_FUNCS_ONCE([usleep]) + AC_CHECK_TYPE([useconds_t], [], + [AC_DEFINE([useconds_t], [unsigned int], [Define to an unsigned 32-bit + type if <sys/types.h> lacks this type.])]) + if test $ac_cv_func_usleep = no; then + HAVE_USLEEP=0 + else + dnl POSIX allows implementations to reject arguments larger than + dnl 999999, but GNU guarantees it will work. + AC_CACHE_CHECK([whether usleep allows large arguments], + [gl_cv_func_usleep_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <unistd.h> +]], [[return !!usleep (1000000);]])], + [gl_cv_func_usleep_works=yes], [gl_cv_func_usleep_works=no], + [case "$host_os" in + # Guess yes on glibc systems. + *-gnu* | gnu*) gl_cv_func_usleep_works="guessing yes" ;; + # Guess yes on musl systems. + *-musl*) gl_cv_func_usleep_works="guessing yes" ;; + # Guess yes on systems that emulate the Linux system calls. + midipix*) gl_cv_func_usleep_works="guessing yes" ;; + # Guess no on native Windows. + mingw*) gl_cv_func_usleep_works="guessing no" ;; + # If we don't know, obey --enable-cross-guesses. + *) gl_cv_func_usleep_works="$gl_cross_guess_normal" ;; + esac + ])]) + case "$gl_cv_func_usleep_works" in + *yes) ;; + *) + REPLACE_USLEEP=1 + ;; + esac + fi +]) |