Undefine ABS; some POSIX systems define it as 1.

From-SVN: r3445

Undefine ABS; some POSIX systems define it as 1.
From-SVN: r3445
ac889e46 · Richard Kenner · d79f08e0 · ac889e46
Commit ac889e46 authored Feb 09, 1993 by Richard Kenner
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gcc/rtl.h
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--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -22,6 +22,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

 #undef FFS  /* Some systems predefine this symbol; don't let it interfere.  */
 #undef FLOAT /* Likewise.  */
+#undef ABS /* Likewise.  */

 /* Register Transfer Language EXPRESSIONS CODES */