HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 35428fb6 | 1 | # float_h.m4 serial 9 |
| af07e104 | 2 | dnl Copyright (C) 2007, 2009-2013 Free Software Foundation, Inc. |
| c4b681fd 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_FLOAT_H], | |
| 8 | [ | |
| 9 | AC_REQUIRE([AC_PROG_CC]) | |
| 10 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
| 11 | FLOAT_H= | |
| 231c0e0e | 12 | REPLACE_FLOAT_LDBL=0 |
| c4b681fd | 13 | case "$host_os" in |
| 231c0e0e | 14 | aix* | beos* | openbsd* | mirbsd* | irix*) |
| c4b681fd | 15 | FLOAT_H=float.h |
| 231c0e0e LC |
16 | ;; |
| 17 | freebsd*) | |
| 18 | case "$host_cpu" in | |
| 19 | changequote(,)dnl | |
| 20 | i[34567]86 ) | |
| 21 | changequote([,])dnl | |
| 22 | FLOAT_H=float.h | |
| 23 | ;; | |
| 24 | x86_64 ) | |
| 25 | # On x86_64 systems, the C compiler may still be generating | |
| 26 | # 32-bit code. | |
| 27 | AC_EGREP_CPP([yes], | |
| 28 | [#if defined __LP64__ || defined __x86_64__ || defined __amd64__ | |
| 29 | yes | |
| 30 | #endif], | |
| 31 | [], | |
| 32 | [FLOAT_H=float.h]) | |
| 33 | ;; | |
| 34 | esac | |
| 35 | ;; | |
| 35428fb6 LC |
36 | linux*) |
| 37 | case "$host_cpu" in | |
| 38 | powerpc*) | |
| 39 | FLOAT_H=float.h | |
| 40 | ;; | |
| 41 | esac | |
| 42 | ;; | |
| 231c0e0e LC |
43 | esac |
| 44 | case "$host_os" in | |
| 35428fb6 | 45 | aix* | freebsd* | linux*) |
| 231c0e0e LC |
46 | if test -n "$FLOAT_H"; then |
| 47 | REPLACE_FLOAT_LDBL=1 | |
| 48 | fi | |
| c4b681fd LC |
49 | ;; |
| 50 | esac | |
| 35428fb6 LC |
51 | |
| 52 | dnl Test against glibc-2.7 Linux/SPARC64 bug. | |
| 53 | REPLACE_ITOLD=0 | |
| 54 | AC_CACHE_CHECK([whether conversion from 'int' to 'long double' works], | |
| 55 | [gl_cv_func_itold_works], | |
| 56 | [ | |
| 57 | AC_RUN_IFELSE( | |
| 58 | [AC_LANG_SOURCE([[ | |
| 59 | int i = -1; | |
| 60 | volatile long double ld; | |
| 61 | int main () | |
| 62 | { | |
| 63 | ld += i * 1.0L; | |
| 64 | if (ld > 0) | |
| 65 | return 1; | |
| 66 | return 0; | |
| 67 | }]])], | |
| 68 | [gl_cv_func_itold_works=yes], | |
| 69 | [gl_cv_func_itold_works=no], | |
| 70 | [case "$host" in | |
| 71 | sparc*-*-linux*) | |
| 72 | AC_EGREP_CPP([yes], | |
| 73 | [#if defined __LP64__ || defined __arch64__ | |
| 74 | yes | |
| 75 | #endif], | |
| 76 | [gl_cv_func_itold_works="guessing no"], | |
| 77 | [gl_cv_func_itold_works="guessing yes"]) | |
| 78 | ;; | |
| 79 | *) gl_cv_func_itold_works="guessing yes" ;; | |
| 80 | esac | |
| 81 | ]) | |
| 82 | ]) | |
| 83 | case "$gl_cv_func_itold_works" in | |
| 84 | *no) | |
| 85 | REPLACE_ITOLD=1 | |
| 86 | dnl We add the workaround to <float.h> but also to <math.h>, | |
| 87 | dnl to increase the chances that the fix function gets pulled in. | |
| 88 | FLOAT_H=float.h | |
| 89 | ;; | |
| 90 | esac | |
| 91 | ||
| 231c0e0e LC |
92 | if test -n "$FLOAT_H"; then |
| 93 | gl_NEXT_HEADERS([float.h]) | |
| 94 | fi | |
| c4b681fd | 95 | AC_SUBST([FLOAT_H]) |
| dd7d0148 | 96 | AM_CONDITIONAL([GL_GENERATE_FLOAT_H], [test -n "$FLOAT_H"]) |
| 35428fb6 | 97 | AC_SUBST([REPLACE_ITOLD]) |
| c4b681fd | 98 | ]) |