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## Check for math library. Taken from libtool.m4.
## Defines:
## LIBM
## LIBS (adds library when needed)
AC_DEFUN([ye_CHECK_LIBM],
[AC_REQUIRE([AC_CANONICAL_HOST])dnl
case "$target" in
NONE) yeti_libm_target="$host" ;;
*) yeti_libm_target="$target" ;;
esac
LIBM=
case "$yeti_libm_target" in
*-*-beos* | *-*-cygwin*)
# These system don't have libm
;;
*-ncr-sysv4.3*)
AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
AC_CHECK_LIB(m, sqrt, LIBM="$LIBM -lm")
;;
*)
AC_CHECK_LIB(m, sqrt, LIBM="-lm")
;;
esac
AC_SUBST(LIBM)
LIBS="$LIBS $LIBM"])
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