33 lines
941 B
Plaintext
33 lines
941 B
Plaintext
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# unistd_h.m4 serial 3
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dnl Copyright (C) 2006 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 Written by Simon Josefsson
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AC_DEFUN([gl_HEADER_UNISTD],
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[
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AC_CHECK_HEADERS([unistd.h], [
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UNISTD_H=''
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], [
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UNISTD_H='unistd.h'
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])
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AC_SUBST(UNISTD_H)
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dnl This module decides to build unistd.h if it is missing.
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dnl The fchdir module decides to build unistd.h if fchdir() is missing.
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dnl Therefore check for the prerequisites of lib/unistd.h always.
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gl_PREREQ_UNISTD
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])
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dnl Prerequisites of lib/unistd.h.
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AC_DEFUN([gl_PREREQ_UNISTD],
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[
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AC_CHECK_HEADERS_ONCE([unistd.h])
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if test $ac_cv_header_unistd_h = yes; then
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gl_ABSOLUTE_HEADER([unistd.h])
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ABSOLUTE_UNISTD_H=\"$gl_cv_absolute_unistd_h\"
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fi
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AC_SUBST([ABSOLUTE_UNISTD_H])
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])
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