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

annotate m4/frexp.m4 @ 15857:6b8400199763

New module 'sqrtf'. * lib/math.in.h (sqrtf): New declaration. * lib/sqrtf.c: New file. * m4/sqrtf.m4: New file. * m4/math_h.m4 (gl_MATH_H): Test whether sqrtf is declared. (gl_MATH_H_DEFAULTS): Initialize GNULIB_SQRTF, HAVE_SQRTF. * modules/math (Makefile.am): Substitute GNULIB_SQRTF, HAVE_SQRTF. * modules/sqrtf: New file. * tests/test-math-c++.cc: Check the declaration of sqrtf. * doc/posix-functions/sqrtf.texi: Mention the new module.

author	Bruno Haible <bruno@clisp.org>
date	Sat, 08 Oct 2011 21:16:48 +0200
parents	328819af1c02
children	916745fe55a6

rev	line source
15595 328819af1c02 Support for MSVC compiler: Avoid division by a literal 0. Bruno Haible <bruno@clisp.org> parents: 15356 diff changeset	1 # frexp.m4 serial 12
14079 97fc9a21a8fb maint: update almost all copyright ranges to include 2011 Jim Meyering <meyering@redhat.com> parents: 13918 diff changeset	2 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 AC_DEFUN([gl_FUNC_FREXP],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	8 [
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
13460 54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	10 AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM])
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	11 FREXP_LIBM=
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	12 if test $gl_cv_func_frexp_no_libm = no; then
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	13 AC_CACHE_CHECK([whether frexp() can be used with libm],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	14 [gl_cv_func_frexp_in_libm],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	15 [
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	16 save_LIBS="$LIBS"
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	17 LIBS="$LIBS -lm"
13578 1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	18 AC_LINK_IFELSE(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	19 [AC_LANG_PROGRAM(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	20 [[#include <math.h>
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	21 double x;]],
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	22 [[int e; return frexp (x, &e) > 0;]])],
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	23 [gl_cv_func_frexp_in_libm=yes],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	24 [gl_cv_func_frexp_in_libm=no])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	25 LIBS="$save_LIBS"
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	26 ])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	27 if test $gl_cv_func_frexp_in_libm = yes; then
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	28 FREXP_LIBM=-lm
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	29 fi
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	30 fi
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31 if test $gl_cv_func_frexp_no_libm = yes \
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	32 \|\| test $gl_cv_func_frexp_in_libm = yes; then
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	33 save_LIBS="$LIBS"
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	34 LIBS="$LIBS $FREXP_LIBM"
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	35 gl_FUNC_FREXP_WORKS
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	36 LIBS="$save_LIBS"
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	37 case "$gl_cv_func_frexp_works" in
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	38 *yes) gl_func_frexp=yes ;;
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	39 *) gl_func_frexp=no; REPLACE_FREXP=1; FREXP_LIBM= ;;
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	40 esac
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	41 else
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	42 gl_func_frexp=no
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	43 fi
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44 if test $gl_func_frexp = yes; then
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 10418 diff changeset	45 AC_DEFINE([HAVE_FREXP], [1],
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	46 [Define if the frexp() function is available and works.])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	47 fi
8627 fd0df3b4a14d Clarify the dependencies on libm. Bruno Haible <bruno@clisp.org> parents: 8546 diff changeset	48 AC_SUBST([FREXP_LIBM])
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	49 ])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	50
9440 176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	51 AC_DEFUN([gl_FUNC_FREXP_NO_LIBM],
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	52 [
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	53 AC_REQUIRE([gl_MATH_H_DEFAULTS])
13460 54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	54 AC_REQUIRE([gl_CHECK_FREXP_NO_LIBM])
9440 176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	55 if test $gl_cv_func_frexp_no_libm = yes; then
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	56 gl_FUNC_FREXP_WORKS
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	57 case "$gl_cv_func_frexp_works" in
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	58 *yes) gl_func_frexp_no_libm=yes ;;
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	59 *) gl_func_frexp_no_libm=no; REPLACE_FREXP=1 ;;
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	60 esac
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	61 else
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	62 gl_func_frexp_no_libm=no
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	63 dnl Set REPLACE_FREXP here because the system may have frexp in libm.
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	64 REPLACE_FREXP=1
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	65 fi
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	66 if test $gl_func_frexp_no_libm = yes; then
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 10418 diff changeset	67 AC_DEFINE([HAVE_FREXP_IN_LIBC], [1],
9440 176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	68 [Define if the frexp() function is available in libc.])
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	69 fi
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	70 ])
176074d93ed1 New module 'frexp-nolibm'. Bruno Haible <bruno@clisp.org> parents: 8845 diff changeset	71
13460 54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	72 dnl Test whether frexp() can be used without linking with libm.
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	73 dnl Set gl_cv_func_frexp_no_libm to 'yes' or 'no' accordingly.
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	74 AC_DEFUN([gl_CHECK_FREXP_NO_LIBM],
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	75 [
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	76 AC_CACHE_CHECK([whether frexp() can be used without linking with libm],
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	77 [gl_cv_func_frexp_no_libm],
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	78 [
13578 1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	79 AC_LINK_IFELSE(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	80 [AC_LANG_PROGRAM(
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	81 [[#include <math.h>
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	82 double x;]],
1e26f884665f Modernize AC_TRY_LINK invocations. Bruno Haible <bruno@clisp.org> parents: 13460 diff changeset	83 [[int e; return frexp (x, &e) > 0;]])],
13460 54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	84 [gl_cv_func_frexp_no_libm=yes],
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	85 [gl_cv_func_frexp_no_libm=no])
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	86 ])
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	87 ])
54037f4be4a4 Unify tests that set gl_cv_func_frexp_no_libm. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	88
8546 d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	89 dnl Test whether frexp() works also on denormalized numbers (this fails e.g. on
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	90 dnl NetBSD 3.0), on infinite numbers (this fails e.g. on IRIX 6.5 and mingw),
15356 13f119e60592 Comments. Bruno Haible <bruno@clisp.org> parents: 14997 diff changeset	91 dnl and on negative zero (this fails e.g. on NetBSD 4.99 and mingw).
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	92 AC_DEFUN([gl_FUNC_FREXP_WORKS],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	93 [
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	94 AC_REQUIRE([AC_PROG_CC])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	95 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	96 AC_CACHE_CHECK([whether frexp works], [gl_cv_func_frexp_works],
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	97 [
13579 da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	98 AC_RUN_IFELSE(
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	99 [AC_LANG_SOURCE([[
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	100 #include <float.h>
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	101 #include <math.h>
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	102 #include <string.h>
13834 108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	103 /* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	104 ICC 10.0 has a bug when optimizing the expression -zero.
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	105 The expression -DBL_MIN * DBL_MIN does not work when cross-compiling
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	106 to PowerPC on MacOS X 10.5. */
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	107 #if defined __hpux \|\| defined __sgi \|\| defined __ICC
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	108 static double
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	109 compute_minus_zero (void)
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	110 {
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	111 return -DBL_MIN * DBL_MIN;
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	112 }
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	113 # define minus_zero compute_minus_zero ()
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	114 #else
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	115 double minus_zero = -0.0;
108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	116 #endif
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	117 int main()
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	118 {
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 13834 diff changeset	119 int result = 0;
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	120 int i;
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	121 volatile double x;
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	122 double zero = 0.0;
8546 d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	123 /* Test on denormalized numbers. */
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	124 for (i = 1, x = 1.0; i >= DBL_MIN_EXP; i--, x *= 0.5)
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	125 ;
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	126 if (x > 0.0)
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	127 {
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	128 int exp;
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	129 double y = frexp (x, &exp);
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	130 /* On machines with IEEE754 arithmetic: x = 1.11254e-308, exp = -1022.
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	131 On NetBSD: y = 0.75. Correct: y = 0.5. */
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	132 if (y != 0.5)
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 13834 diff changeset	133 result \|= 1;
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	134 }
8546 d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	135 /* Test on infinite numbers. */
15595 328819af1c02 Support for MSVC compiler: Avoid division by a literal 0. Bruno Haible <bruno@clisp.org> parents: 15356 diff changeset	136 x = 1.0 / zero;
8546 d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	137 {
d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	138 int exp;
d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	139 double y = frexp (x, &exp);
d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	140 if (y != x)
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 13834 diff changeset	141 result \|= 2;
8546 d03503ff8d69 Check against a bug of frexp() on IRIX 6.5. Bruno Haible <bruno@clisp.org> parents: 8493 diff changeset	142 }
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	143 /* Test on negative zero. */
13834 108bbfd6f03b frexp, tests: work around ICC bug with -zero Eric Blake <eblake@redhat.com> parents: 13579 diff changeset	144 x = minus_zero;
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	145 {
1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	146 int exp;
1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	147 double y = frexp (x, &exp);
1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	148 if (memcmp (&y, &x, sizeof x))
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 13834 diff changeset	149 result \|= 4;
10418 1e251b3d489c frexp: test for NetBSD failure on -0.0 Eric Blake <ebb9@byu.net> parents: 9508 diff changeset	150 }
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 13834 diff changeset	151 return result;
13579 da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	152 }]])],
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	153 [gl_cv_func_frexp_works=yes],
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	154 [gl_cv_func_frexp_works=no],
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	155 [case "$host_os" in
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	156 netbsd* \| irix* \| mingw*) gl_cv_func_frexp_works="guessing no";;
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	157 *) gl_cv_func_frexp_works="guessing yes";;
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	158 esac
da9779900713 Modernize AC_TRY_RUN invocations. Bruno Haible <bruno@clisp.org> parents: 13578 diff changeset	159 ])
8491 af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	160 ])
af98e0b44387 New module 'frexp'. Bruno Haible <bruno@clisp.org> parents: diff changeset	161 ])

Mercurial > hg > octave-kai > gnulib-hg

annotate m4/frexp.m4 @ 15857:6b8400199763