+ # See if linking `seq' requires -lm.
+ # It does on nearly every system. The single exception (so far) is
+ # BeOS which has all the math functions in the normal runtime library
+ # and doesn't have a separate math library.
+
+ AC_SUBST(SEQ_LIBM)
+ ac_seq_body='
+ static double x, y;
+ x = floor (x);
+ x = rint (x);
+ x = modf (x, &y);'
+ AC_TRY_LINK([#include <math.h>], $ac_seq_body, ,
+ [ac_seq_save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_TRY_LINK([#include <math.h>], $ac_seq_body, SEQ_LIBM=-lm)
+ LIBS="$ac_seq_save_LIBS"
+ ])