diff options
Diffstat (limited to 'gnulib/m4/usleep.m4')
| m--------- | gnulib | 0 | ||||
| -rw-r--r-- | gnulib/m4/usleep.m4 | 35 |
2 files changed, 35 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/usleep.m4 b/gnulib/m4/usleep.m4 new file mode 100644 index 0000000..3e96a16 --- /dev/null +++ b/gnulib/m4/usleep.m4 @@ -0,0 +1,35 @@ +# usleep.m4 serial 2 +dnl Copyright (C) 2009-2011 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_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 $ac_cv_func_usleep = no; then + HAVE_USLEEP=0 + else + dnl POSIX allows implementations to reject arguments larger than + dnl 999999, but GNU guarantees it will work. + AC_CACHE_CHECK([whether usleep allows large arguments], + [gl_cv_func_usleep_works], + [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ +#include <unistd.h> +]], [[return !!usleep (1000000);]])], + [gl_cv_func_usleep_works=yes], [gl_cv_func_usleep_works=no], + [gl_cv_func_usleep_works="guessing no"])]) + if test "$gl_cv_func_usleep_works" != yes; then + REPLACE_USLEEP=1 + fi + fi +]) |