diff options
Diffstat (limited to 'tvmet-1.7.1/config/ac_cxx_have_sysv_math.m4')
| -rw-r--r-- | tvmet-1.7.1/config/ac_cxx_have_sysv_math.m4 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/tvmet-1.7.1/config/ac_cxx_have_sysv_math.m4 b/tvmet-1.7.1/config/ac_cxx_have_sysv_math.m4 new file mode 100644 index 000000000..0d9364c2c --- /dev/null +++ b/tvmet-1.7.1/config/ac_cxx_have_sysv_math.m4 @@ -0,0 +1,46 @@ +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 +]) |