| Reid Spencer | b2ed0526 | 2006-11-03 18:04:08 +0000 | [diff] [blame] | 1 | # |
| 2 | # This function determins if the the HUGE_VAL macro is compilable with the |
| 3 | # -pedantic switch or not. XCode < 2.4.1 doesn't get it right. |
| 4 | # |
| 5 | AC_DEFUN([AC_HUGE_VAL_CHECK],[ |
| 6 | AC_CACHE_CHECK([for HUGE_VAL sanity], [ac_cv_huge_val_sanity],[ |
| Reid Spencer | 6a7c0b7 | 2006-11-03 19:49:16 +0000 | [diff] [blame] | 7 | AC_LANG_PUSH([C++]) |
| 8 | CXXFLAGS=-pedantic |
| Reid Spencer | b2ed0526 | 2006-11-03 18:04:08 +0000 | [diff] [blame] | 9 | AC_RUN_IFELSE( |
| 10 | AC_LANG_PROGRAM( |
| 11 | [#include <math.h>], |
| 12 | [double x = HUGE_VAL; return x != x; ]), |
| 13 | [ac_cv_huge_val_sanity=yes],[ac_cv_huge_val_sanity=no], |
| 14 | [ac_cv_huge_val_sanity=yes]) |
| Reid Spencer | 6a7c0b7 | 2006-11-03 19:49:16 +0000 | [diff] [blame] | 15 | AC_LANG_POP([C++]) |
| Reid Spencer | b2ed0526 | 2006-11-03 18:04:08 +0000 | [diff] [blame] | 16 | ]) |
| 17 | AC_SUBST(HUGE_VAL_SANITY,$ac_cv_huge_val_sanity) |
| 18 | ]) |