gnulib: m4/printf-frexp.m4 annotate

annotate m4/printf-frexp.m4 @ 40057:b06060465f09

maint: Run 'make update-copyright'

author	Paul Eggert <eggert@cs.ucla.edu>
date	Tue, 01 Jan 2019 00:25:11 +0100
parents	10eb9086bea0
children

rev	line source
13578 1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	1 # printf-frexp.m4 serial 5
40057 b06060465f09 maint: Run 'make update-copyright' Paul Eggert <eggert@cs.ucla.edu> parents: 19484 diff changeset	2 dnl Copyright (C) 2007, 2009-2019 Free Software Foundation, Inc.
8240 536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 dnl Check how to define printf_frexp() without linking with libm.
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	8
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	9 AC_DEFUN([gl_FUNC_PRINTF_FREXP],
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	10 [
13460 54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	11 AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM])
8240 536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	12 if test $gl_cv_func_frexp_no_libm = yes; then
8495 eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	13 gl_FUNC_FREXP_WORKS
eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	14 case "$gl_cv_func_frexp_works" in
eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	15 *yes)
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 8495 diff changeset	16 AC_DEFINE([HAVE_FREXP_IN_LIBC], [1],
8495 eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	17 [Define if the frexp function is available in libc.])
eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	18 ;;
eff68e94da66 Don't use the system's frexp() if it does not work (example: NetBSD 3.0). Bruno Haible <bruno@clisp.org> parents: 8240 diff changeset	19 esac
8240 536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	20 fi
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	21
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	22 AC_CACHE_CHECK([whether ldexp can be used without linking with libm],
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	23 [gl_cv_func_ldexp_no_libm],
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	24 [
13578 1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	25 AC_LINK_IFELSE(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	26 [AC_LANG_PROGRAM(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	27 [[#include <math.h>
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	28 double x;
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	29 int y;]],
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	30 [[return ldexp (x, y) < 1;]])],
8240 536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31 [gl_cv_func_ldexp_no_libm=yes],
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	32 [gl_cv_func_ldexp_no_libm=no])
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	33 ])
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	34 if test $gl_cv_func_ldexp_no_libm = yes; then
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 8495 diff changeset	35 AC_DEFINE([HAVE_LDEXP_IN_LIBC], [1],
8240 536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	36 [Define if the ldexp function is available in libc.])
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	37 fi
536315dcb204 New module 'printf-frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	38 ])

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annotate m4/printf-frexp.m4 @ 40057:b06060465f09