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30 lines
998 B
Plaintext
30 lines
998 B
Plaintext
# nonblocking.m4 serial 2
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dnl Copyright (C) 2011-2017 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Tests whether non-blocking I/O is natively supported by read(), write().
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dnl Sets gl_cv_have_nonblocking.
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dnl Also tests whether open() supports O_NONBLOCK.
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dnl Sets gl_cv_have_open_O_NONBLOCK.
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AC_DEFUN([gl_NONBLOCKING_IO],
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[
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dnl Use AC_REQUIRE here, so that the default behavior below is expanded
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dnl once only, before all statements that occur in other macros.
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AC_REQUIRE([gl_NONBLOCKING_IO_BODY])
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])
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AC_DEFUN([gl_NONBLOCKING_IO_BODY],
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[
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AC_REQUIRE([AC_CANONICAL_HOST])
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case "$host_os" in
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mingw*) gl_cv_have_nonblocking=no ;;
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*) gl_cv_have_nonblocking=yes ;;
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esac
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case "$host_os" in
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mingw*) gl_cv_have_open_O_NONBLOCK=no ;;
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*) gl_cv_have_open_O_NONBLOCK=yes ;;
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esac
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])
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