https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64081
--- Comment #34 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to David Edelsohn from comment #32) > How far are you going back in the bisection effort? You may be earlier than > the point at which GCC on AIX generated stab strings continuation lines. At > worst you manually can apply the continuation code from gcc/xcoffout.h > > /* XCOFF32 maximum length is 64K; XLC limits to 16K. */ > #define DBX_CONTIN_LENGTH 16384 > > /* XLC uses '?' as continuation character. */ > #define DBX_CONTIN_CHAR '?' David, thanks for your input here, BTW. Same problem, even if I add your above two lines to rs6000.h. I am starting with r219827 as suggested here: https://gcc.gnu.org/ml/gcc-patches/2016-02/msg00451.html The aforementioned revision gets us around January 18, 2015, which is around the time y'all were discussing the bootstrap failure. My tree contains: 1. The rtl patch being discussed 2. A patch for r233572 to get GCC 6.x to build GCC 5.x (see BZ#69959). 3. Your suggested changes for xcoff continuation. I am attaching the changes to r219827 that still exhibit STABSTRING ERROR problems while bootstrapping. These are in comment 33. Any tips greatly appareciated.