http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55399
Bug #: 55399
Summary: pch tests fail on mips-mti-linux-gnu target
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: pch
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: s...@gcc.gnu.org
CC: jos...@codesourcery.com
Starting with r192715 a large number (almost all) of the pch tests started
failing on the mips-mti-linux-gnu target. I have verified that they pass using
r192714.
I think the problem has something to do with when/where/if pch_cpp_save_state()
is called but I am not sure. I noticed that done_preinclude is an
uninitialized
global variable, but explicitly initializing it to false did not fix the
problem.
I have no idea why this would not be affecting other targets as I don't see any
MIPS specific changes in this patch but I have not seen it on other targets.
The patch that caused the regression is mostly in libcpp:
2012-10-23 Joseph Myers <jos...@codesourcery.com>
* files.c (struct _cpp_file): Add implicit_preinclude.
(pch_open_file): Allow a previously opened implicitly included
file.
(_cpp_find_file): Add implicit_preinclude argument. Free file and
do not call open_file_failed if implicit_preinclude. Store
implicit_preinclude value.
(_cpp_stack_include, _cpp_fake_include, _cpp_compare_file_date):
Update calls to _cpp_find_file.
(_cpp_stack_include): Handle IT_DEFAULT.
(cpp_push_default_include): New.
* include/cpplib.h (cpp_push_default_include): Declare.
* init.c (cpp_read_main_file): Update call to _cpp_find_file.
* internal.h (enum include_type): Add IT_DEFAULT.
(_cpp_find_file): Update prototype.
