--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -2470,12 +2470,9 @@
     #--------------------------------------------------------------------
     # On a few very rare systems, all of the libm.a stuff is
     # already in libc.a.  Set compiler flags accordingly.
-    # Also, Linux requires the "ieee" library for math to work
-    # right (and it must appear before "-lm").
     #--------------------------------------------------------------------
 
     AC_CHECK_FUNC(sin, MATH_LIBS="", MATH_LIBS="-lm")
-    AC_CHECK_LIB(ieee, main, [MATH_LIBS="-lieee $MATH_LIBS"])
 
     #--------------------------------------------------------------------
     # Interactive UNIX requires -linet instead of -lsocket, plus it