octave-kai/gnulib-hg: m4/logf.m4 annotate

annotate m4/logf.m4 @ 17476:6057744acd2c default tip master

autoupdate

author	Karl Berry <karl@freefriends.org>
date	Fri, 16 Aug 2013 06:32:22 -0700
parents	e542fd46ad6f
children

rev	line source
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	1 # logf.m4 serial 6
17249 e542fd46ad6f maint: update all copyright year number ranges Eric Blake <eblake@redhat.com> parents: 16811 diff changeset	2 dnl Copyright (C) 2011-2013 Free Software Foundation, Inc.
15863 c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 AC_DEFUN([gl_FUNC_LOGF],
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	8 [
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	9 m4_divert_text([DEFAULTS], [gl_logf_required=plain])
15863 c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	10 AC_REQUIRE([gl_MATH_H_DEFAULTS])
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	11 AC_REQUIRE([gl_FUNC_LOG])
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	12
16580 fdbe3125f81a math: Ensure declarations of math functions. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	13 dnl Persuade glibc <math.h> to declare logf().
fdbe3125f81a math: Ensure declarations of math functions. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	14 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
fdbe3125f81a math: Ensure declarations of math functions. Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	15
15863 c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	16 dnl Test whether logf() exists. Assume that logf(), if it exists, is
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	17 dnl defined in the same library as log().
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	18 save_LIBS="$LIBS"
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	19 LIBS="$LIBS $LOG_LIBM"
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	20 AC_CHECK_FUNCS([logf])
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	21 LIBS="$save_LIBS"
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	22 if test $ac_cv_func_logf = yes; then
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	23 LOGF_LIBM="$LOG_LIBM"
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	24
16632 2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	25 save_LIBS="$LIBS"
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	26 LIBS="$LIBS $LOGF_LIBM"
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	27 gl_FUNC_LOGF_WORKS
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	28 LIBS="$save_LIBS"
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	29 case "$gl_cv_func_logf_works" in
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	30 *yes) ;;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	31 *) REPLACE_LOGF=1 ;;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	32 esac
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	33
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	34 m4_ifdef([gl_FUNC_LOGF_IEEE], [
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	35 if test $gl_logf_required = ieee && test $REPLACE_LOGF = 0; then
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	36 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	37 AC_CACHE_CHECK([whether logf works according to ISO C 99 with IEC 60559],
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	38 [gl_cv_func_logf_ieee],
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	39 [
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	40 save_LIBS="$LIBS"
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	41 LIBS="$LIBS $LOGF_LIBM"
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	42 AC_RUN_IFELSE(
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	43 [AC_LANG_SOURCE([[
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	44 #ifndef __NO_MATH_INLINES
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	45 # define __NO_MATH_INLINES 1 /* for glibc */
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	46 #endif
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	47 #include <math.h>
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	48 /* Compare two numbers with ==.
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	49 This is a separate function because IRIX 6.5 "cc -O" miscompiles an
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	50 'x == x' test. */
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	51 static int
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	52 numeric_equal (float x, float y)
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	53 {
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	54 return x == y;
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	55 }
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	56 static float dummy (float x) { return 0; }
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	57 int main (int argc, char *argv[])
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	58 {
16749 2c1499f688aa logf-ieee: Fix test whether logf works. Bruno Haible <bruno@clisp.org> parents: 16645 diff changeset	59 float (*my_logf) (float) = argc ? logf : dummy;
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	60 /* Test logf(negative).
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	61 This test fails on NetBSD 5.1. */
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	62 float y = my_logf (-1.0f);
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	63 if (numeric_equal (y, y))
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	64 return 1;
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	65 return 0;
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	66 }
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	67 ]])],
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	68 [gl_cv_func_logf_ieee=yes],
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	69 [gl_cv_func_logf_ieee=no],
16811 b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	70 [case "$host_os" in
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	71 # Guess yes on glibc systems.
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	72 -gnu) gl_cv_func_logf_ieee="guessing yes" ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	73 # If we don't know, assume the worst.
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	74 *) gl_cv_func_logf_ieee="guessing no" ;;
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	75 esac
b187fc49964b Avoid "guessing no" guesses when cross-compiling to glibc systems. Bruno Haible <bruno@clisp.org> parents: 16749 diff changeset	76 ])
16645 d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	77 LIBS="$save_LIBS"
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	78 ])
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	79 case "$gl_cv_func_logf_ieee" in
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	80 *yes) ;;
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	81 *) REPLACE_LOGF=1 ;;
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	82 esac
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	83 fi
d7a6433b4967 logf-ieee: Work around test failure on NetBSD 5.1. Bruno Haible <bruno@clisp.org> parents: 16632 diff changeset	84 ])
15863 c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	85 else
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	86 HAVE_LOGF=0
16632 2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	87 fi
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	88 if test $HAVE_LOGF = 0 \|\| test $REPLACE_LOGF = 1; then
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	89 dnl Find libraries needed to link lib/logf.c.
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	90 if test $HAVE_LOGF = 0; then
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	91 LOGF_LIBM="$LOG_LIBM"
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	92 fi
15863 c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	93 fi
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	94 AC_SUBST([LOGF_LIBM])
c2fa2febdb1f New module 'logf'. Bruno Haible <bruno@clisp.org> parents: diff changeset	95 ])
16632 2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	96
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	97 dnl Test whether logf() works.
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	98 dnl On OSF/1 5.1, logf(-0.0f) is NaN.
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	99 AC_DEFUN([gl_FUNC_LOGF_WORKS],
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	100 [
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	101 AC_REQUIRE([AC_PROG_CC])
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	102 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	103 AC_CACHE_CHECK([whether logf works], [gl_cv_func_logf_works],
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	104 [
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	105 AC_RUN_IFELSE(
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	106 [AC_LANG_SOURCE([[
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	107 #include <math.h>
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	108 volatile float x;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	109 float y;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	110 int main ()
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	111 {
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	112 x = -0.0f;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	113 y = logf (x);
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	114 if (!(y + y == y))
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	115 return 1;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	116 return 0;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	117 }
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	118 ]])],
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	119 [gl_cv_func_logf_works=yes],
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	120 [gl_cv_func_logf_works=no],
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	121 [case "$host_os" in
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	122 osf*) gl_cv_func_logf_works="guessing no";;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	123 *) gl_cv_func_logf_works="guessing yes";;
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	124 esac
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	125 ])
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	126 ])
2450f24b2cbc logf: Work around OSF/1 5.1 bug. Bruno Haible <bruno@clisp.org> parents: 16580 diff changeset	127 ])

Mercurial > hg > octave-kai > gnulib-hg

annotate m4/logf.m4 @ 17476:6057744acd2c default tip master