https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66246
Bug ID: 66246
Summary: PCH breaks preprocessor
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: kai-bugs at cats dot ms
Target Milestone: ---
Created attachment 35590
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35590&action=edit
Header
Test consists of:
- make sure we have no PCH
- compile the source w/o PCH
- compile the PCH
- compile the source w/PCH
As far as I can tell, the reason for the problems is that macros no longer get
expanded
If it matters, this is from the MinGW packaged with Qt 5.4.
$ cat t.sh
#! /bin/bash -x
gcc --version
rm th.hh.gch
g++ -Winvalid-pch -c -save-temps test.cc
g++ -x c++-header -c -save-temps th.hh
g++ -Winvalid-pch -c -save-temps test.cc
$ ./t.sh
+ gcc --version
gcc.exe (i686-posix-dwarf-rev2, Built by MinGW-W64 project) 4.9.1
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ rm th.hh.gch
+ g++ -Winvalid-pch -c -save-temps test.cc
+ g++ -x c++-header -c -save-temps th.hh
+ g++ -Winvalid-pch -c -save-temps test.cc
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw.h:13:0,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:10,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15,
from test.cc:4:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw_secapi.h:51:10: error:
redefinition of 'struct __if_array'
struct __if_array {
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw.h:13:0,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:10,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15,
from th.hh:1:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw_secapi.h:51:10: error:
previous definition of 'struct __if_array'
struct __if_array {
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:10:0,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15,
from test.cc:4:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw.h: In function 'void
__debugbreak()':
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw.h:657:101: error:
redefinition of 'void __debugbreak()'
__MINGW_INTRIN_INLINE void __cdecl __debugbreak(void)
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:10:0,
from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15,
from th.hh:1:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/_mingw.h:657:101: note: 'void
__debugbreak()' previously defined here
__MINGW_INTRIN_INLINE void __cdecl __debugbreak(void)
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15:0,
from test.cc:4:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h: At global scope:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:159:16: error:
redefinition of 'struct localeinfo_struct'
typedef struct localeinfo_struct {
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15:0,
from th.hh:1:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:159:16: error:
previous definition of 'struct localeinfo_struct'
typedef struct localeinfo_struct {
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15:0,
from test.cc:4:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:162:18: error:
invalid type in declaration before ',' token
} _locale_tstruct,*_locale_t;
^
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:162:18: error:
conflicting declaration 'typedef int _locale_tstruct'
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15:0,
from th.hh:1:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:162:3: note:
previous declaration as 'typedef struct localeinfo_struct _locale_tstruct'
} _locale_tstruct,*_locale_t;
^
In file included from
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/assert.h:15:0,
from test.cc:4:
C:/Qt/Tools/mingw491_32/i686-w64-mingw32/include/crtdefs.h:162:20: erro
