On Thu, 2016-07-21 at 09:00 +0200, Uros Bizjak wrote:
> Hello!
> 
> > > gcc/ChangeLog:
> > > PR c/70339
> > > * diagnostic-show-locus.c (diagnostic_show_locus): If this is
> > > the
> > > same location as last time, don't skip if we have fix-it hints.
> > > Clarify the skipping logic by converting it from one "if"
> > > clause
> > > to repeated "if" clauses.
> > > * spellcheck-tree.c: Include "cpplib.h".
> > > (find_closest_macro_cpp_cb): Move here from c/c-decl.c.
> > > (best_macro_match::best_macro_match): New constructor.
> > > * spellcheck-tree.h (struct edit_distance_traits<cpp_hashnode
> > > *>):
> > > Move here from c/c-decl.c.
> > > (class best_macro_match): Move here from c/c-decl.c, converting
> > > from a typedef to a subclass, gaining a ctor.
> 
> This part introduced bootstrap failure on CentOS 5.11:
> 
> g++ -std=gnu++98 -fno-PIE -c   -g  -DIN_GCC    -fno-strict-aliasing
> -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall
> -Wwrite-strings -Wcast-qual -Wno-format -Wmissing-format-attribute
> -Woverloaded-virtual -fno-common  -DHAVE_CONFIG_H -I. -I.
> -I../../git/gcc/gcc -I../../git/gcc/gcc/.
> -I../../git/gcc/gcc/../include -I../../git/gcc/gcc/../libcpp/include
> -I/usr/local/include -I/usr/local/include -I/usr/local/include
> -I../../git/gcc/gcc/../libdecnumber
> -I../../git/gcc/gcc/../libdecnumber/bid -I../libdecnumber
> -I../../git/gcc/gcc/../libbacktrace   -o spellcheck-tree.o -MT
> spellcheck-tree.o -MMD -MP -MF ./.deps/spellcheck-tree.TPo
> ../../git/gcc/gcc/spellcheck-tree.c
> ../../git/gcc/gcc/spellcheck-tree.c: In constructor
> ‘best_macro_match::best_macro_match(tree_node*, edit_distance_t,
> cpp_reader*)’:
> ../../git/gcc/gcc/spellcheck-tree.c:94: error: class
> ‘best_macro_match’ does not have any field named ‘best_match’
> ../../git/gcc/gcc/spellcheck-tree.c:94: error: no matching function
> for call to ‘best_match<tree_node*, cpp_hashnode*>::best_match()’
> ../../git/gcc/gcc/spellcheck.h:91: note: candidates are:
> best_match<GOAL_TYPE, CANDIDATE_TYPE>::best_match(GOAL_TYPE,
> edit_distance_t) [with GOAL_TYPE = tree_node*, CANDIDATE_TYPE =
> cpp_hashnode*]
> ../../git/gcc/gcc/spellcheck.h:81: note:
> best_match<tree_node*, cpp_hashnode*>::best_match(const
> best_match<tree_node*, cpp_hashnode*>&)
> gmake: *** [spellcheck-tree.o] Error 1
> 
> CentOS 5 has pretty old system compiler [gcc version 4.1.2 20080704
> (Red Hat 4.1.2-55)], but the build worked until the above patch was
> committed. Is it possible to work around this failure somehow?

Sorry about the breakage.

I've now built a gcc 4.1 locally, and with that I can reproduce the
issue.  Am investigating...

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