#serial 5dnl Misc lib-related macros for fileutils, sh-utils, textutils.AC_DEFUN([jm_LIB_CHECK],[  # Check for libypsec.a on Dolphin M88K machines.  AC_CHECK_LIB(ypsec, main)  # m88k running dgux 5.4 needs this  AC_CHECK_LIB(ldgc, main)  # Some programs need to link with -lm.  printf does if it uses  # lib/strtod.c which uses pow.  And seq uses the math functions,  # floor, modf, rint.  And factor uses sqrt.  And sleep uses fesetround.  # Save a copy of $LIBS and add $FLOOR_LIBM before these tests  # Check for these math functions used by seq.  ac_su_saved_lib="$LIBS"  LIBS="$LIBS -lm"  AC_CHECK_FUNCS(floor modf rint)  LIBS="$ac_su_saved_lib"  AC_SUBST(SQRT_LIBM)  AC_CHECK_FUNCS(sqrt)  if test $ac_cv_func_sqrt = no; then    AC_CHECK_LIB(m, sqrt, [SQRT_LIBM=-lm])  fi  AC_SUBST(FESETROUND_LIBM)  AC_CHECK_FUNCS(fesetround)  if test $ac_cv_func_fesetround = no; then    AC_CHECK_LIB(m, fesetround, [FESETROUND_LIBM=-lm])  fi  # The -lsun library is required for YP support on Irix-4.0.5 systems.  # m88k/svr3 DolphinOS systems using YP need -lypsec for id.  AC_SEARCH_LIBS(yp_match, [sun ypsec])  # SysV needs -lsec, older versions of Linux need -lshadow for  # shadow passwords.  UnixWare 7 needs -lgen.  AC_SEARCH_LIBS(getspnam, [shadow sec gen])  AC_CHECK_HEADERS(shadow.h)  # Requirements for su.c.  shadow_includes="\$ac_includes_default#if HAVE_SHADOW_H# include <shadow.h>#endif"  AC_CHECK_MEMBERS([struct spwd.sp_pwdp],,,[$shadow_includes])  AC_CHECK_FUNCS(getspnam)  # SCO-ODT-3.0 is reported to need -lufc for crypt.  # NetBSD needs -lcrypt for crypt.  ac_su_saved_lib="$LIBS"  AC_SEARCH_LIBS(crypt, [ufc crypt], [LIB_CRYPT="$ac_cv_search_crypt"])  LIBS="$ac_su_saved_lib"  AC_SUBST(LIB_CRYPT)])