| dnl $Id: ac_cxx_have_sysv_math.m4,v 1.2 2004/04/23 23:41:52 opetzold Exp $ |
| dnl |
| dnl Check for compiler support for double SYSV math, if there define |
| dnl HAVE_SYSV_MATH. |
| dnl |
| |
| AC_DEFUN([AC_CXX_HAVE_SYSV_MATH], |
| [AC_CACHE_CHECK(for SYSV math library, |
| ac_cv_cxx_have_sysv_math, |
| [AC_LANG_PUSH([C++]) |
| ac_save_LIBS="$LIBS" |
| LIBS="$LIBS -lm" |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([[ |
| #ifndef _ALL_SOURCE |
| #define _ALL_SOURCE |
| #endif |
| #ifndef _XOPEN_SOURCE |
| #define _XOPEN_SOURCE |
| #endif |
| #ifndef _XOPEN_SOURCE_EXTENDED |
| #define _XOPEN_SOURCE_EXTENDED 1 |
| #endif |
| #include <cmath>]], [[double x = 1.0; double y = 1.0; |
| _class(x); |
| ilogb(x); |
| itrunc(x); |
| nearest(x); |
| rsqrt(x); |
| uitrunc(x); |
| |
| copysign(x,y); |
| drem(x,y); |
| fmod(x,y); |
| hypot(x,y); |
| nextafter(x,y); |
| remainder(x,y); |
| scalb(x,y); |
| unordered(x,y); |
| return 0;]])],[ac_cv_cxx_have_sysv_math=yes],[ac_cv_cxx_have_sysv_math=no]) |
| LIBS="$ac_save_LIBS" |
| AC_LANG_POP([C++]) |
| ]) |
| if test "$ac_cv_cxx_have_sysv_math" = yes; then |
| AC_DEFINE(HAVE_SYSV_MATH,,[Define if the compiler supports SYSV math library]) |
| fi |
| ]) |
