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19 lines
531 B
Plaintext
19 lines
531 B
Plaintext
# pipe2.m4 serial 2
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dnl Copyright (C) 2009-2019 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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AC_DEFUN([gl_FUNC_PIPE2],
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[
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AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
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dnl Persuade glibc <unistd.h> to declare pipe2().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_FUNCS_ONCE([pipe2])
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if test $ac_cv_func_pipe2 != yes; then
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HAVE_PIPE2=0
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fi
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])
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