[Bug bootstrap/52947] New: [4.7 Regression] bootstrap fails due to wrong include search path composition

[rainer@emrich-ebersheim.de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52947

             Bug #: 52947
           Summary: [4.7 Regression] bootstrap fails due to wrong include
                    search path composition
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rainer@emrich-ebersheim.de


native x86_64-w64-mingw32 bootstrap using --with-sysroot
This used to work for the 4.6 series.

../../src/gcc-4.7.0/configure
--prefix=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0
--with-gnu-as
--with-as=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/bin/as
--with-gnu-ld
--with-ld=/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/bin/ld
--build=x86_64-w64-mingw32
--enable-languages=c,ada,c++,fortran,java,lto,objc,obj-c++
--with-gmp-include=/SCRATCH/tmp.pzGXGetUXT/install/include
--with-gmp-lib=/SCRATCH/tmp.pzGXGetUXT/install/lib64
--with-mpfr-include=/SCRATCH/tmp.pzGXGetUXT/install/include
--with-mpfr-lib=/SCRATCH/tmp.pzGXGetUXT/install/lib64
--with-mpc-include=/SCRATCH/tmp.pzGXGetUXT/install/include
--with-mpc-lib=/SCRATCH/tmp.pzGXGetUXT/install/lib64
--with-ppl-include=/SCRATCH/tmp.pzGXGetUXT/install/include
--with-ppl-lib=/SCRATCH/tmp.pzGXGetUXT/install/lib64
--with-cloog-include=/SCRATCH/tmp.pzGXGetUXT/install/include
--with-cloog-lib=/SCRATCH/tmp.pzGXGetUXT/install/lib64
--with-local-prefix=/opt/devel/tec/devel/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0
--enable-libgomp --enable-fully-dynamic-string --disable-multilib
--enable-checking=release --disable-werror --with-sysroot=/x86_64-w64-trunk
--with-host-libstdcxx='-Wl,-Bstatic,-lstdc++,-Bdynamic'

gcc 4.7.0 bootstrap fails during configuration in libgcc:

checking how to run the C preprocessor... /lib/cpp
configure: error: in
`/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/x86_64-w64-mingw32/libgcc':
configure: error: C preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
gmake[2]: *** [configure-stage1-target-libgcc] Error 1
gmake[2]: Leaving directory `/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0'
gmake[1]: *** [stage1-bubble] Error 2
gmake[1]: Leaving directory `/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0'
gmake: *** [all] Error 2 


config.log in libgcc shows:

configure:3893: checking how to run the C preprocessor
configure:3924: /SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/./gcc/xgcc
-B/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/./gcc/
-L/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/lib
-L/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/mingw/lib
-isystem
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/include
-isystem
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/mingw/include
-B/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/bin/
-B/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/lib/
-isystem
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/include
-isystem
/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/sys-include
   -E  conftest.c
In file included from
D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/gcc/include-fixed/syslimits.h:7:0,
                 from
D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/gcc/include-fixed/limits.h:34,
                 from conftest.c:10:
D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/gcc/include-fixed/limits.h:169:61:
error: no include path in which to search for limits.h
configure:3924: $? = 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "GNU C Runtime Library"
| #define PACKAGE_TARNAME "libgcc"
| #define PACKAGE_VERSION "1.0"
| #define PACKAGE_STRING "GNU C Runtime Library 1.0"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL "http://www.gnu.org/software/libgcc/"
| /* end confdefs.h.  */
| #ifdef __STDC__
| # include <limits.h>
| #else
| # include <assert.h>
| #endif
|              Syntax error 


further analysis shows that the include search path composition is wrong.
For gcc-4.6.3 stage1 xgcc the search path is as follows:

nicht vorhandenes Verzeichnis
»d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.6.3/x86_64-w64-mingw32/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.6.3/mingw/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.6.3/x86_64-w64-mingw32/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.6.3/x86_64-w64-mingw32/sys-include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.6.3\gcc-4.6.3\gcc\../lib/gcc/x86_64-w64-mingw32/4.6.3/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.6.3\gcc-4.6.3\gcc\../lib/gcc/x86_64-w64-mingw32/4.6.3/include-fixed«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.6.3\gcc-4.6.3\gcc\../lib/gcc/x86_64-w64-mingw32/4.6.3/../../../../x86_64-w64-mingw32/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.6.3/gcc-4.6.3/lib/gcc/x86_64-w64-mingw32/4.6.3/include«
wird ignoriert
nicht vorhandenes Verzeichnis
»D:/x86_64-w64-trunkd:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.6.3/lib/gcc/x86_64-w64-mingw32/4.6.3/../../../../include«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.6.3/gcc-4.6.3/lib/gcc/x86_64-w64-mingw32/4.6.3/include-fixed«
wird ignoriert
nicht vorhandenes Verzeichnis
»d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.6.3/gcc-4.6.3/x86_64-w64-mingw32/include«
wird ignoriert
#include "..." - Suche beginnt hier:
#include <...> - Suche beginnt hier:
 D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.6.3/gcc-4.6.3/gcc/include
 D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.6.3/gcc-4.6.3/gcc/include-fixed
 D:/x86_64-w64-trunk/mingw/include
Ende der Suchliste.

As you see here the important search path component
D:/x86_64-w64-trunk/mingw/include is ok.
For gcc-4.7.0 in contrast I get:

ignoring nonexistent directory
"d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/include"
ignoring nonexistent directory
"d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/mingw/include"
ignoring nonexistent directory
"d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/include"
ignoring nonexistent directory
"d:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/x86_64-w64-mingw32/sys-include"
ignoring nonexistent directory
"d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.7.0\gcc-4.7.0\gcc\../lib/gcc/x86_64-w64-mingw32/4.7.0/include"
ignoring nonexistent directory
"d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.7.0\gcc-4.7.0\gcc\../lib/gcc/x86_64-w64-mingw32/4.7.0/include-fixed"
ignoring nonexistent directory
"d:\msys\scratch\tmp.pzgxgetuxt\gcc-4.7.0\gcc-4.7.0\gcc\../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory
"d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.7.0/gcc-4.7.0/lib/gcc/x86_64-w64-mingw32/4.7.0/include"
ignoring nonexistent directory
"D:/x86_64-w64-trunkd:/opt/devel/gnu/gcc/MINGW_NT/x86_64-w64-mingw32/mingw-w64-runtime-trunk-svn/gcc-4.7.0/lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../include"
ignoring nonexistent directory
"d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.7.0/gcc-4.7.0/lib/gcc/x86_64-w64-mingw32/4.7.0/include-fixed"
ignoring nonexistent directory
"d:/msys/scratch/tmp.pzgxgetuxt/gcc-4.7.0/gcc-4.7.0/x86_64-w64-mingw32/include"
ignoring nonexistent directory "D:/x86_64-w64-trunkD:/msys/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/gcc/include
 D:/msys/SCRATCH/tmp.pzGXGetUXT/gcc-4.7.0/gcc-4.7.0/gcc/include-fixed

Here the composition for the include search path gets wrong:

ignoring nonexistent directory "D:/x86_64-w64-trunkD:/msys/mingw/include"

The component /mingw/include is converted to an absolut windows path before
it's appended to the sysroot. That's palin wrong.
The library search path is ok.

Any idea how to solve this?