HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 005de2e8 | 1 | # ceil.m4 serial 9 |
| 5e69ceb7 | 2 | dnl Copyright (C) 2007, 2009-2014 Free Software Foundation, Inc. |
| b81eb646 LC |
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_CEIL], | |
| 8 | [ | |
| 9 | m4_divert_text([DEFAULTS], [gl_ceil_required=plain]) | |
| 10 | AC_REQUIRE([gl_MATH_H_DEFAULTS]) | |
| 11 | dnl Test whether ceil() can be used without libm. | |
| 12 | gl_FUNC_CEIL_LIBS | |
| 13 | if test "$CEIL_LIBM" = "?"; then | |
| 14 | CEIL_LIBM= | |
| 15 | fi | |
| 16 | m4_ifdef([gl_FUNC_CEIL_IEEE], [ | |
| 17 | if test $gl_ceil_required = ieee && test $REPLACE_CEIL = 0; then | |
| 005de2e8 | 18 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| b81eb646 LC |
19 | AC_CACHE_CHECK([whether ceil works according to ISO C 99 with IEC 60559], |
| 20 | [gl_cv_func_ceil_ieee], | |
| 21 | [ | |
| 22 | save_LIBS="$LIBS" | |
| 23 | LIBS="$LIBS $CEIL_LIBM" | |
| 24 | AC_RUN_IFELSE( | |
| 25 | [AC_LANG_SOURCE([[ | |
| 26 | #ifndef __NO_MATH_INLINES | |
| 27 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 28 | #endif | |
| 29 | #include <math.h> | |
| 30 | ]gl_DOUBLE_MINUS_ZERO_CODE[ | |
| 31 | ]gl_DOUBLE_SIGNBIT_CODE[ | |
| 231c0e0e LC |
32 | static double dummy (double f) { return 0; } |
| 33 | int main (int argc, char *argv[]) | |
| b81eb646 | 34 | { |
| 231c0e0e LC |
35 | double (*my_ceil) (double) = argc ? ceil : dummy; |
| 36 | int result = 0; | |
| b81eb646 | 37 | /* Test whether ceil (-0.0) is -0.0. */ |
| 231c0e0e LC |
38 | if (signbitd (minus_zerod) && !signbitd (my_ceil (minus_zerod))) |
| 39 | result |= 1; | |
| 40 | /* Test whether ceil (-0.3) is -0.0. */ | |
| 41 | if (signbitd (-0.3) && !signbitd (my_ceil (-0.3))) | |
| 42 | result |= 2; | |
| 43 | return result; | |
| b81eb646 LC |
44 | } |
| 45 | ]])], | |
| 46 | [gl_cv_func_ceil_ieee=yes], | |
| 47 | [gl_cv_func_ceil_ieee=no], | |
| 005de2e8 LC |
48 | [case "$host_os" in |
| 49 | # Guess yes on glibc systems. | |
| 50 | *-gnu*) gl_cv_func_ceil_ieee="guessing yes" ;; | |
| 51 | # If we don't know, assume the worst. | |
| 52 | *) gl_cv_func_ceil_ieee="guessing no" ;; | |
| 53 | esac | |
| 54 | ]) | |
| b81eb646 LC |
55 | LIBS="$save_LIBS" |
| 56 | ]) | |
| 57 | case "$gl_cv_func_ceil_ieee" in | |
| 58 | *yes) ;; | |
| 59 | *) REPLACE_CEIL=1 ;; | |
| 60 | esac | |
| 61 | fi | |
| 62 | ]) | |
| 63 | if test $REPLACE_CEIL = 1; then | |
| 3d458a81 | 64 | dnl No libraries are needed to link lib/ceil.c. |
| b81eb646 LC |
65 | CEIL_LIBM= |
| 66 | fi | |
| 67 | AC_SUBST([CEIL_LIBM]) | |
| 68 | ]) | |
| 69 | ||
| 70 | # Determines the libraries needed to get the ceil() function. | |
| 71 | # Sets CEIL_LIBM. | |
| 72 | AC_DEFUN([gl_FUNC_CEIL_LIBS], | |
| 73 | [ | |
| 74 | gl_CACHE_VAL_SILENT([gl_cv_func_ceil_libm], [ | |
| 75 | gl_cv_func_ceil_libm=? | |
| 76 | AC_LINK_IFELSE( | |
| 77 | [AC_LANG_PROGRAM( | |
| 78 | [[#ifndef __NO_MATH_INLINES | |
| 79 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 80 | #endif | |
| 81 | #include <math.h> | |
| 82 | double x;]], | |
| 83 | [[x = ceil(x);]])], | |
| 84 | [gl_cv_func_ceil_libm=]) | |
| 85 | if test "$gl_cv_func_ceil_libm" = "?"; then | |
| 86 | save_LIBS="$LIBS" | |
| 87 | LIBS="$LIBS -lm" | |
| 88 | AC_LINK_IFELSE( | |
| 89 | [AC_LANG_PROGRAM( | |
| 90 | [[#ifndef __NO_MATH_INLINES | |
| 91 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 92 | #endif | |
| 93 | #include <math.h> | |
| 94 | double x;]], | |
| 95 | [[x = ceil(x);]])], | |
| 96 | [gl_cv_func_ceil_libm="-lm"]) | |
| 97 | LIBS="$save_LIBS" | |
| 98 | fi | |
| 99 | ]) | |
| 100 | CEIL_LIBM="$gl_cv_func_ceil_libm" | |
| 101 | ]) |