* c-typeck.c (check_modify_expr): New function.
(build_modify_expr): Call it if warn_sequence_point.
* c-decl.c (warn_sequence_point): New variable.
(c_decode_option): Handle -Wsequence-point and
-Wno-sequence-point. Enable -Wsequence-point as part of -Wall.
* c-tree.h (warn_sequence_point): Declare.
* invoke.texi (-Wsequence-point): Document.
* toplev.c (documented_lang_options): Add -Wsequence-point and
-Wno-sequence-point.
Original work by Michael Meeks, 16 Jun 1998.
testsuite:
* gcc.dg/sequence-pt-1.c: New test.
From-SVN: r36840
