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annotate m4/ffsll.m4 @ 18070:d460ec17f09f

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author Karl Berry <karl@freefriends.org>
date Tue, 28 Jul 2015 13:57:32 -0700
parents ab58d4870664
children
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Eric Blake <eblake@redhat.com>
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1 # ffsll.m4 serial 1
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Paul Eggert <eggert@cs.ucla.edu>
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2 dnl Copyright (C) 2011-2015 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_FFSLL],
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8 [
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9 AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
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10
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11 dnl Persuade glibc <string.h> to declare ffsll().
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12 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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13
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14 AC_CHECK_FUNCS_ONCE([ffsll])
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15 if test $ac_cv_func_ffsll = no; then
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16 HAVE_FFSLL=0
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17 fi
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18 ])