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Diffstat (limited to 'gl/m4/nonblocking.m4')
| -rw-r--r-- | gl/m4/nonblocking.m4 | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/gl/m4/nonblocking.m4 b/gl/m4/nonblocking.m4 new file mode 100644 index 0000000..7d885e5 --- /dev/null +++ b/gl/m4/nonblocking.m4 @@ -0,0 +1,29 @@ +# nonblocking.m4 serial 2 +dnl Copyright (C) 2011-2019 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 Tests whether non-blocking I/O is natively supported by read(), write(). +dnl Sets gl_cv_have_nonblocking. +dnl Also tests whether open() supports O_NONBLOCK. +dnl Sets gl_cv_have_open_O_NONBLOCK. +AC_DEFUN([gl_NONBLOCKING_IO], +[ + dnl Use AC_REQUIRE here, so that the default behavior below is expanded + dnl once only, before all statements that occur in other macros. + AC_REQUIRE([gl_NONBLOCKING_IO_BODY]) +]) + +AC_DEFUN([gl_NONBLOCKING_IO_BODY], +[ + AC_REQUIRE([AC_CANONICAL_HOST]) + case "$host_os" in + mingw*) gl_cv_have_nonblocking=no ;; + *) gl_cv_have_nonblocking=yes ;; + esac + case "$host_os" in + mingw*) gl_cv_have_open_O_NONBLOCK=no ;; + *) gl_cv_have_open_O_NONBLOCK=yes ;; + esac +]) |