HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 3d458a81 | 1 | # ceil.m4 serial 6 |
| b81eb646 LC |
2 | dnl Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc. |
| 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 $REPLACE_CEIL = 0; then | |
| 18 | AC_CACHE_CHECK([whether ceil works according to ISO C 99 with IEC 60559], | |
| 19 | [gl_cv_func_ceil_ieee], | |
| 20 | [ | |
| 21 | save_LIBS="$LIBS" | |
| 22 | LIBS="$LIBS $CEIL_LIBM" | |
| 23 | AC_RUN_IFELSE( | |
| 24 | [AC_LANG_SOURCE([[ | |
| 25 | #ifndef __NO_MATH_INLINES | |
| 26 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 27 | #endif | |
| 28 | #include <math.h> | |
| 29 | ]gl_DOUBLE_MINUS_ZERO_CODE[ | |
| 30 | ]gl_DOUBLE_SIGNBIT_CODE[ | |
| 31 | int main() | |
| 32 | { | |
| 33 | /* Test whether ceil (-0.0) is -0.0. */ | |
| 34 | if (signbitd (minus_zerod) && !signbitd (ceil (minus_zerod))) | |
| 35 | return 1; | |
| 36 | return 0; | |
| 37 | } | |
| 38 | ]])], | |
| 39 | [gl_cv_func_ceil_ieee=yes], | |
| 40 | [gl_cv_func_ceil_ieee=no], | |
| 41 | [gl_cv_func_ceil_ieee="guessing no"]) | |
| 42 | LIBS="$save_LIBS" | |
| 43 | ]) | |
| 44 | case "$gl_cv_func_ceil_ieee" in | |
| 45 | *yes) ;; | |
| 46 | *) REPLACE_CEIL=1 ;; | |
| 47 | esac | |
| 48 | fi | |
| 49 | ]) | |
| 50 | if test $REPLACE_CEIL = 1; then | |
| 3d458a81 | 51 | dnl No libraries are needed to link lib/ceil.c. |
| b81eb646 LC |
52 | CEIL_LIBM= |
| 53 | fi | |
| 54 | AC_SUBST([CEIL_LIBM]) | |
| 55 | ]) | |
| 56 | ||
| 57 | # Determines the libraries needed to get the ceil() function. | |
| 58 | # Sets CEIL_LIBM. | |
| 59 | AC_DEFUN([gl_FUNC_CEIL_LIBS], | |
| 60 | [ | |
| 61 | gl_CACHE_VAL_SILENT([gl_cv_func_ceil_libm], [ | |
| 62 | gl_cv_func_ceil_libm=? | |
| 63 | AC_LINK_IFELSE( | |
| 64 | [AC_LANG_PROGRAM( | |
| 65 | [[#ifndef __NO_MATH_INLINES | |
| 66 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 67 | #endif | |
| 68 | #include <math.h> | |
| 69 | double x;]], | |
| 70 | [[x = ceil(x);]])], | |
| 71 | [gl_cv_func_ceil_libm=]) | |
| 72 | if test "$gl_cv_func_ceil_libm" = "?"; then | |
| 73 | save_LIBS="$LIBS" | |
| 74 | LIBS="$LIBS -lm" | |
| 75 | AC_LINK_IFELSE( | |
| 76 | [AC_LANG_PROGRAM( | |
| 77 | [[#ifndef __NO_MATH_INLINES | |
| 78 | # define __NO_MATH_INLINES 1 /* for glibc */ | |
| 79 | #endif | |
| 80 | #include <math.h> | |
| 81 | double x;]], | |
| 82 | [[x = ceil(x);]])], | |
| 83 | [gl_cv_func_ceil_libm="-lm"]) | |
| 84 | LIBS="$save_LIBS" | |
| 85 | fi | |
| 86 | ]) | |
| 87 | CEIL_LIBM="$gl_cv_func_ceil_libm" | |
| 88 | ]) |