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relocatable-prog: Update documentation. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes.
author Bruno Haible <bruno@clisp.org>
date Sun, 24 Feb 2019 01:49:15 +0100
parents b06060465f09
children
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1 # sinl.m4 serial 8
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2 dnl Copyright (C) 2010-2019 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_SINL],
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8 [
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9 AC_REQUIRE([gl_MATH_H_DEFAULTS])
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10 AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
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11
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12 dnl Persuade glibc <math.h> to declare sinl().
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13 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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14
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15 SINL_LIBM=
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16 AC_CACHE_CHECK([whether sinl() can be used without linking with libm],
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17 [gl_cv_func_sinl_no_libm],
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18 [
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19 AC_LINK_IFELSE(
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20 [AC_LANG_PROGRAM(
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21 [[#ifndef __NO_MATH_INLINES
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22 # define __NO_MATH_INLINES 1 /* for glibc */
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23 #endif
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24 #include <math.h>
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25 long double (*funcptr) (long double) = sinl;
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26 long double x;]],
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27 [[return funcptr (x) > 0.4
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28 || sinl (x) > 0.4;]])],
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29 [gl_cv_func_sinl_no_libm=yes],
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30 [gl_cv_func_sinl_no_libm=no])
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31 ])
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32 if test $gl_cv_func_sinl_no_libm = no; then
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33 AC_CACHE_CHECK([whether sinl() can be used with libm],
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34 [gl_cv_func_sinl_in_libm],
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35 [
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36 save_LIBS="$LIBS"
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37 LIBS="$LIBS -lm"
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38 AC_LINK_IFELSE(
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39 [AC_LANG_PROGRAM(
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40 [[#ifndef __NO_MATH_INLINES
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41 # define __NO_MATH_INLINES 1 /* for glibc */
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42 #endif
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43 #include <math.h>
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44 long double (*funcptr) (long double) = sinl;
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45 long double x;]],
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46 [[return funcptr (x) > 0.4
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47 || sinl (x) > 0.4;]])],
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48 [gl_cv_func_sinl_in_libm=yes],
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49 [gl_cv_func_sinl_in_libm=no])
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50 LIBS="$save_LIBS"
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51 ])
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52 if test $gl_cv_func_sinl_in_libm = yes; then
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53 SINL_LIBM=-lm
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54 fi
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55 fi
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56 if test $gl_cv_func_sinl_no_libm = yes \
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57 || test $gl_cv_func_sinl_in_libm = yes; then
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58 dnl Also check whether it's declared.
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59 dnl Mac OS X 10.3 has sinl() in libc but doesn't declare it in <math.h>.
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60 AC_CHECK_DECL([sinl], , [HAVE_DECL_SINL=0], [[#include <math.h>]])
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61 else
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62 HAVE_DECL_SINL=0
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63 HAVE_SINL=0
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64 dnl Find libraries needed to link lib/sinl.c, lib/sincosl.c, lib/trigl.c.
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65 if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
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66 AC_REQUIRE([gl_FUNC_SIN])
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67 SINL_LIBM="$SIN_LIBM"
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68 else
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69 AC_REQUIRE([gl_FUNC_ISNANL])
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70 AC_REQUIRE([gl_FUNC_FLOOR])
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71 AC_REQUIRE([gl_FUNC_FLOORL])
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72 dnl Append $ISNANL_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
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73 case " $SINL_LIBM " in
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74 *" $ISNANL_LIBM "*) ;;
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75 *) SINL_LIBM="$SINL_LIBM $ISNANL_LIBM" ;;
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76 esac
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77 dnl Append $FLOOR_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
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78 case " $SINL_LIBM " in
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79 *" $FLOOR_LIBM "*) ;;
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80 *) SINL_LIBM="$SINL_LIBM $FLOOR_LIBM" ;;
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81 esac
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82 dnl Append $FLOORL_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
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83 case " $SINL_LIBM " in
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84 *" $FLOORL_LIBM "*) ;;
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85 *) SINL_LIBM="$SINL_LIBM $FLOORL_LIBM" ;;
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86 esac
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87 fi
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88 fi
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89 AC_SUBST([SINL_LIBM])
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90 ])