re PR bootstrap/70704 (AIX bootstrap comparison failure)
PR bootstrap/70704
* configure.ac (--enable-stage1-checking): For --disable-checking or
implicit --enable-checking, make sure extra flag matches in between
stage1 and later checking.
* configure: Regenerated.
gcc/
* configure.ac (--enable-checking): Document extra flag, for
non-release builds default to --enable-checking=yes,extra.
If misc checking and extra checking, define CHECKING_P to 2 instead
of 1.
* common.opt (fchecking=): Add.
* doc/invoke.texi (-fchecking=): Document.
* doc/install.texi: Document --enable-checking changes.
* configure: Regenerated.
* config.in: Regenerated.
gcc/cp/
* pt.c (build_non_dependent_expr): Use flag_checking > 1 instead of
just flag_checking.