Mercurial > gnulib
annotate m4/remainder.m4 @ 39194:a84ae461a2f6
Add cross-compilation results for GNU/Hurd.
* m4/calloc.m4: Add GNU/Hurd guess.
* m4/cbrtl.m4: Likewise.
* m4/ceil.m4: Likewise.
* m4/ceilf.m4: Likewise.
* m4/ceill.m4: Likewise.
* m4/chown.m4: Likewise.
* m4/duplocale.m4: Likewise.
* m4/exp2l.m4: Likewise.
* m4/expm1.m4: Likewise.
* m4/fchdir.m4: Likewise.
* m4/floor.m4: Likewise.
* m4/floorf.m4: Likewise.
* m4/fmod.m4: Likewise.
* m4/fmodf.m4: Likewise.
* m4/fmodl.m4: Likewise.
* m4/getcwd.m4: Likewise.
* m4/getgroups.m4: Likewise.
* m4/gettimeofday.m4: Likewise.
* m4/hypot.m4: Likewise.
* m4/hypotf.m4: Likewise.
* m4/hypotl.m4: Likewise.
* m4/link-follow.m4: Likewise.
* m4/link.m4: Likewise.
* m4/linkat.m4: Likewise.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/log10f.m4: Likewise.
* m4/log1p.m4: Likewise.
* m4/log1pf.m4: Likewise.
* m4/log1pl.m4: Likewise.
* m4/log2.m4: Likewise.
* m4/log2f.m4: Likewise.
* m4/logf.m4: Likewise.
* m4/lstat.m4: Likewise.
* m4/malloc.m4: Likewise.
* m4/mbrlen.m4: Likewise.
* m4/mbrtowc.m4: Likewise.
* m4/mkdir.m4: Likewise.
* m4/mkfifo.m4: Likewise.
* m4/mknod.m4: Likewise.
* m4/mkstemp.m4: Likewise.
* m4/modf.m4: Likewise.
* m4/modff.m4: Likewise.
* m4/modfl.m4: Likewise.
* m4/printf.m4: Likewise.
* m4/pselect.m4: Likewise.
* m4/ptsname.m4: Likewise.
* m4/putenv.m4: Likewise.
* m4/readlink.m4: Likewise.
* m4/realloc.m4: Likewise.
* m4/remainder.m4: Likewise.
* m4/remainderf.m4: Likewise.
* m4/remainderl.m4: Likewise.
* m4/rmdir.m4: Likewise.
* m4/round.m4: Likewise.
* m4/roundf.m4: Likewise.
* m4/roundl.m4: Likewise.
* m4/select.m4: Likewise.
* m4/setenv.m4: Likewise.
* m4/signbit.m4: Likewise.
* m4/sleep.m4: Likewise.
* m4/stat.m4: Likewise.
* m4/strerror.m4: Likewise.
* m4/strtok_r.m4: Likewise.
* m4/symlink.m4: Likewise.
* m4/symlinkat.m4: Likewise.
* m4/trunc.m4: Likewise.
* m4/truncf.m4: Likewise.
* m4/truncl.m4: Likewise.
* m4/tzset.m4: Likewise.
* m4/ungetc.m4: Likewise.
* m4/usleep.m4: Likewise.
* m4/wcwidth.m4: Likewise.
| author | Samuel Thibault <samuel.thibault@gnu.org> |
|---|---|
| date | Fri, 29 Dec 2017 17:30:07 +0100 |
| parents | 5c951c71f25c |
| children | 10eb9086bea0 |
| rev | line source |
|---|---|
|
39194
a84ae461a2f6
Add cross-compilation results for GNU/Hurd.
Samuel Thibault <samuel.thibault@gnu.org>
parents:
38672
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|
1 # remainder.m4 serial 6 |
| 38305 | 2 dnl Copyright (C) 2012-2017 Free Software Foundation, Inc. |
| 36103 | 3 dnl This file is free software; the Free Software Foundation |
| 4 dnl gives unlimited permission to copy and/or distribute it, | |
| 5 dnl with or without modifications, as long as this notice is preserved. | |
| 6 | |
| 7 AC_DEFUN([gl_FUNC_REMAINDER], | |
| 8 [ | |
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9 m4_divert_text([DEFAULTS], [gl_remainder_required=plain]) |
| 36103 | 10 AC_REQUIRE([gl_MATH_H_DEFAULTS]) |
| 11 | |
| 12 dnl Test whether remainder() is declared. On IRIX 5.3 it is not declared. | |
| 13 AC_CHECK_DECL([remainder], , [HAVE_DECL_REMAINDER=0], [[#include <math.h>]]) | |
| 14 | |
| 15 REMAINDER_LIBM= | |
| 16 AC_CACHE_CHECK([whether remainder() can be used without linking with libm], | |
| 17 [gl_cv_func_remainder_no_libm], | |
| 18 [ | |
| 19 AC_LINK_IFELSE( | |
| 20 [AC_LANG_PROGRAM( | |
| 21 [[#ifndef __NO_MATH_INLINES | |
| 22 # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 23 #endif | |
| 24 #include <math.h> | |
| 25 double x; | |
| 26 double y;]], | |
| 27 [[return remainder (x, y) > 1;]])], | |
| 28 [gl_cv_func_remainder_no_libm=yes], | |
| 29 [gl_cv_func_remainder_no_libm=no]) | |
| 30 ]) | |
| 31 if test $gl_cv_func_remainder_no_libm = no; then | |
| 32 AC_CACHE_CHECK([whether remainder() can be used with libm], | |
| 33 [gl_cv_func_remainder_in_libm], | |
| 34 [ | |
| 35 save_LIBS="$LIBS" | |
| 36 LIBS="$LIBS -lm" | |
| 37 AC_LINK_IFELSE( | |
| 38 [AC_LANG_PROGRAM( | |
| 39 [[#ifndef __NO_MATH_INLINES | |
| 40 # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 41 #endif | |
| 42 #include <math.h> | |
| 43 double x; | |
| 44 double y;]], | |
| 45 [[return remainder (x, y) > 1;]])], | |
| 46 [gl_cv_func_remainder_in_libm=yes], | |
| 47 [gl_cv_func_remainder_in_libm=no]) | |
| 48 LIBS="$save_LIBS" | |
| 49 ]) | |
| 50 if test $gl_cv_func_remainder_in_libm = yes; then | |
| 51 REMAINDER_LIBM=-lm | |
| 52 fi | |
| 53 fi | |
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54 if test $gl_cv_func_remainder_no_libm = yes \ |
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55 || test $gl_cv_func_remainder_in_libm = yes; then |
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56 : |
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57 m4_ifdef([gl_FUNC_REMAINDER_IEEE], [ |
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58 if test $gl_remainder_required = ieee && test $REPLACE_REMAINDER = 0; then |
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59 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
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60 AC_CACHE_CHECK([whether remainder works according to ISO C 99 with IEC 60559], |
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61 [gl_cv_func_remainder_ieee], |
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62 [ |
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63 save_LIBS="$LIBS" |
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64 LIBS="$LIBS $REMAINDER_LIBM" |
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65 AC_RUN_IFELSE( |
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66 [AC_LANG_SOURCE([[ |
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67 #ifndef __NO_MATH_INLINES |
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68 # define __NO_MATH_INLINES 1 /* for glibc */ |
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69 #endif |
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70 #include <math.h> |
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71 /* Compare two numbers with ==. |
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72 This is a separate function because IRIX 6.5 "cc -O" miscompiles an |
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73 'x == x' test. */ |
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74 static int |
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75 numeric_equal (double x, double y) |
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76 { |
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77 return x == y; |
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78 } |
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79 static double dummy (double x, double y) { return 0; } |
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80 int main (int argc, char *argv[]) |
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81 { |
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82 double (*my_remainder) (double, double) = argc ? remainder : dummy; |
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83 double f; |
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84 /* Test remainder(...,0.0). |
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85 This test fails on OSF/1 5.1. */ |
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86 f = my_remainder (2.0, 0.0); |
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87 if (numeric_equal (f, f)) |
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88 return 1; |
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89 return 0; |
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90 } |
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91 ]])], |
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92 [gl_cv_func_remainder_ieee=yes], |
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93 [gl_cv_func_remainder_ieee=no], |
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94 [case "$host_os" in |
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95 # Guess yes on glibc systems. |
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96 *-gnu* | gnu*) gl_cv_func_remainder_ieee="guessing yes" ;; |
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97 # Guess yes on native Windows. |
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98 mingw*) gl_cv_func_remainder_ieee="guessing yes" ;; |
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99 # If we don't know, assume the worst. |
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100 *) gl_cv_func_remainder_ieee="guessing no" ;; |
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101 esac |
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102 ]) |
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103 LIBS="$save_LIBS" |
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104 ]) |
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105 case "$gl_cv_func_remainder_ieee" in |
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106 *yes) ;; |
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107 *) REPLACE_REMAINDER=1 ;; |
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108 esac |
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109 fi |
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110 ]) |
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111 else |
| 36103 | 112 HAVE_REMAINDER=0 |
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113 fi |
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114 if test $HAVE_REMAINDER = 0 || test $REPLACE_REMAINDER = 1; then |
| 36103 | 115 dnl Find libraries needed to link lib/remainder.c. |
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116 AC_REQUIRE([gl_FUNC_FABS]) |
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117 AC_REQUIRE([gl_FUNC_FMOD]) |
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118 AC_REQUIRE([gl_FUNC_ISNAND]) |
| 36103 | 119 REMAINDER_LIBM= |
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120 dnl Append $FABS_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. |
| 36103 | 121 case " $REMAINDER_LIBM " in |
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122 *" $FABS_LIBM "*) ;; |
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123 *) REMAINDER_LIBM="$REMAINDER_LIBM $FABS_LIBM" ;; |
| 36103 | 124 esac |
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125 dnl Append $FMOD_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. |
| 36103 | 126 case " $REMAINDER_LIBM " in |
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127 *" $FMOD_LIBM "*) ;; |
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128 *) REMAINDER_LIBM="$REMAINDER_LIBM $FMOD_LIBM" ;; |
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129 esac |
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130 dnl Append $ISNAND_LIBM to REMAINDER_LIBM, avoiding gratuitous duplicates. |
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131 case " $REMAINDER_LIBM " in |
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5d42cf3681cf
remainder, remainderf, remainderl: Fix computation for large quotients.
Bruno Haible <bruno@clisp.org>
parents:
36214
diff
changeset
|
132 *" $ISNAND_LIBM "*) ;; |
|
5d42cf3681cf
remainder, remainderf, remainderl: Fix computation for large quotients.
Bruno Haible <bruno@clisp.org>
parents:
36214
diff
changeset
|
133 *) REMAINDER_LIBM="$REMAINDER_LIBM $ISNAND_LIBM" ;; |
| 36103 | 134 esac |
| 135 fi | |
| 136 AC_SUBST([REMAINDER_LIBM]) | |
| 137 ]) |