[Bug c/56279] New: Unwanted directory is added to include search path when building for MingGW with --native-system-header-dir

[Bug c/56279] New: Unwanted directory is added to include search path when building for MingGW with --native-system-header-dir

[karlson2k at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56279

             Bug #: 56279
           Summary: Unwanted directory is added to include search path
                    when building for MingGW with
                    --native-system-header-dir
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: karlson2k@gmail.com
              Host: i686-pc-mingw3
            Target: i686-w64-mingw32, x86_64-w64-mingw32
             Build: i686-pc-mingw32


If gcc was build for MinGW with specific --native-system-header-dir than
'mingw/include' is still added to include search path.

Test compilation:


$ echo int main(){return 1;} | i686-w64-mingw32-gcc.exe -pipe -m32 -v -x c -

Using built-in specs.
COLLECT_GCC=i686-w64-mingw32-gcc.exe
COLLECT_LTO_WRAPPER=t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/lto-wrapper.exe
Target: i686-w64-mingw32
Configured with: ../../source/gcc-4.7.2/configure --build=i686-pc-mingw32
--host=i686-pc-mingw32 --target=i686-w64-mingw32 --disable-nls
--disable-multilib --prefix=/home/UserName/mingw-w64/mingw-w64-i686
--with-sysroot=/home/UserName/mingw-w64/mingw-w64-i686
--with-native-system-header-dir=/i686-w64-mingw32/include
--with-host-libstdcxx=/mingw/lib/gcc/mingw32/4.7.2/libstdc++.a
--disable-cloog-version-check --disable-ppl-version-check
--with-mpc=/home/UserName/mingw-w64/packages/gcc/packages/mpc/mpc-1.0.1-i686
--with-mpfr=/home/UserName/mingw-w64/packages/gcc/packages/mpfr/mpfr-3.1.1-i686
--with-gmp=/home/UserName/mingw-w64/packages/gcc/packages/gmp/gmp-5.1.0-i686
--with-ppl=/home/UserName/mingw-w64/packages/gcc/packages/ppl/ppl-1.0-i686
--with-cloog=/home/UserName/mingw-w64/packages/gcc/packages/cloog-ppl/cloog-ppl-0.15.11-i686
--enable-languages=c,c++ --enable-threads=win32 --enable-fully-dynamic-string
--disable-sjlj-exceptions --with-multilib-list=m32 --with-arch=pentium3
--enable-leading-mingw64-underscores --with-dwarf2 --enable-lto
--disable-win32-registry --with-win32-nlsapi=unicode --enable-libstdcxx-debug
Thread model: win32
gcc version 4.7.2 (GCC)
COLLECT_GCC_OPTIONS='-pipe' '-m32' '-v' '-mtune=generic' '-march=pentium3'

t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/cc1.exe
-quiet -v -iprefix
t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../lib/gcc/i686-w64-mingw32/4.7.2/
-isysroot
t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../../mingw-w64-i686
-U_REENTRANT - -quiet -dumpbase - -m32 -mtune=generic -march=pentium3 -auxbase
- -version -o - |

t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/as.exe
-v --32 -o C:\Users\UserName\AppData\Local\Temp\ccG0majQ.o
GNU assembler version 2.23.1 (i686-w64-mingw32) using BFD version (GNU
Binutils) 2.23.1
GNU C (GCC) version 4.7.2 (i686-w64-mingw32)
        compiled by GNU C version 4.7.2, GMP version 5.1.0, MPFR version
3.1.1-p2, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory
"T:/MinGW32/msys/1.0/home/UserName/mingw-w64/mingw-w64-i686/lib/gcc/../../lib/gcc/i686-w64-mingw32/4.7.2/include"
ignoring nonexistent directory
"t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../../mingw-w64-i686T:/MinGW32/msys/1.0/home/UserName/mingw-w64/mingw-w64-i686/lib/gcc/i686-w64-mingw32/4.7.2/../../../../include"
ignoring duplicate directory
"T:/MinGW32/msys/1.0/home/UserName/mingw-w64/mingw-w64-i686/lib/gcc/../../lib/gcc/i686-w64-mingw32/4.7.2/include-fixed"
ignoring duplicate directory
"T:/MinGW32/msys/1.0/home/UserName/mingw-w64/mingw-w64-i686/lib/gcc/../../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/include"
ignoring nonexistent directory
"t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../../mingw-w64-i686/mingw/include"
#include "..." search starts here:
#include <...> search starts here:

t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../lib/gcc/i686-w64-mingw32/4.7.2/include

t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../lib/gcc/i686-w64-mingw32/4.7.2/include-fixed

t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/include
End of search list.
GNU C (GCC) version 4.7.2 (i686-w64-mingw32)
        compiled by GNU C version 4.7.2, GMP version 5.1.0, MPFR version
3.1.1-p2, MPC version 1.0.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 15f70762a5e5104aa198de43826cad3c
COMPILER_PATH=t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/;t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../libexec/gcc/;t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/
LIBRARY_PATH=t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/;t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/;t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib/;t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/
COLLECT_GCC_OPTIONS='-pipe' '-m32' '-v' '-mtune=generic' '-march=pentium3'

t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/collect2.exe
--sysroot=t:\mingw32\msys\1.0\home\username\mingw-w64\mingw-w64-i686\bin\../../mingw-w64-i686
-m i386pe -Bdynamic
t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib/crt2.o
t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/crtbegin.o
-Lt:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2
-Lt:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc
-Lt:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib
-Lt:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib
C:\Users\UserName\AppData\Local\Temp\ccG0majQ.o -lmingw32 -lgcc_eh -lgcc
-lmoldname -lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32
-lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt
t:/mingw32/msys/1.0/home/username/mingw-w64/mingw-w64-i686/bin/../lib/gcc/i686-w64-mingw32/4.7.2/crtend.o

[Bug target/56279] Unwanted directory is added to include search path when building for MingGW with --native-system-header-dir

[karlson2k at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56279

--- Comment #1 from Evgeny Grin <karlson2k at gmail dot com> 2013-02-10 23:04:16 UTC ---
This unwanted dir is added by blindly overriding directory in
gcc/config/i386/mingw32.h:

#undef NATIVE_SYSTEM_HEADER_DIR
#define NATIVE_SYSTEM_HEADER_DIR "/mingw/include"

as result of fixing bug 52947. I think, it needs more improvement. At least for
MinGW this directory should be relative to GCC files, as other include dirs.
And cppdefault.c should be corrected like this:

#ifdef NATIVE_SYSTEM_HEADER_DIR
    /* /usr/include comes dead last.  */
    { NATIVE_SYSTEM_HEADER_DIR, NATIVE_SYSTEM_HEADER_COMPONENT, 0, 0,
      NATIVE_SYSTEM_HEADER_DIR_ADD_SYSROOT, 0 },
#endif

similar to GPLUSPLUS_INCLUDE_DIR part in cppdefault.c.

[Bug target/56279] Unwanted directory is added to include search path when building for MingGW with --native-system-header-dir

[karlson2k at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56279

Evgeny Grin <karlson2k at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|i686-w64-mingw32,           |i686-pc-mingw32,
                   |x86_64-w64-mingw32          |i686-w64-mingw32,
                   |                            |x86_64-w64-mingw32

--- Comment #2 from Evgeny Grin <karlson2k at gmail dot com> 2013-02-10 23:47:59 UTC ---
Result on MinGW32 compiler (tried from mingw site or compiled from sources -
results are the same):

$ echo int main(){return 1;} | gcc.exe -v -E -x c -
Using built-in specs.                                                          
                                                                               
                               COLLECT_GCC=gcc.exe
Target: mingw32
Configured with: ../gcc-4.7.2/configure
--enable-languages=c,c++,ada,fortran,objc,obj-c++ --disable-sjlj-exceptions
--with-dwarf2 --enable-shared --enable-libgomp --disable-win32-registry
--enable-libstdcxx-debug --disable-build-poststage1-with-cxx
--enable-version-specific-runtime-libs --build=mingw32 --prefix=/mingw
Thread model: win32
gcc version 4.7.2 (GCC)
COLLECT_GCC_OPTIONS='-v' '-E' '-mtune=i386' '-march=i386'
 t:/mingw32/bin/../libexec/gcc/mingw32/4.7.2/cc1.exe -E -quiet -v -iprefix
t:\mingw32\bin\../lib/gcc/mingw32/4.7.2/ - -mtune=i386 -march=i386
ignoring nonexistent directory
"t:\mingw32\bin\../lib/gcc/mingw32/4.7.2/../../../../mingw32/include"
ignoring duplicate directory
"t:/mingw32/lib/gcc/../../lib/gcc/mingw32/4.7.2/include"
ignoring nonexistent directory "/mingw/include"
ignoring duplicate directory "t:/mingw32/lib/gcc/../../include"
ignoring duplicate directory
"t:/mingw32/lib/gcc/../../lib/gcc/mingw32/4.7.2/include-fixed"
ignoring nonexistent directory
"t:/mingw32/lib/gcc/../../lib/gcc/mingw32/4.7.2/../../../../mingw32/include"
ignoring nonexistent directory "/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 t:\mingw32\bin\../lib/gcc/mingw32/4.7.2/include
 t:\mingw32\bin\../lib/gcc/mingw32/4.7.2/../../../../include
 t:\mingw32\bin\../lib/gcc/mingw32/4.7.2/include-fixed
End of search list.
# 1 "<stdin>"
# 1 "<command-line>"
# 1 "<stdin>"
int main(){return 1;}
COMPILER_PATH=t:/mingw32/bin/../libexec/gcc/mingw32/4.7.2/;t:/mingw32/bin/../libexec/gcc/;t:/mingw32/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/bin/
LIBRARY_PATH=t:/mingw32/bin/../lib/gcc/mingw32/4.7.2/;t:/mingw32/bin/../lib/gcc/;t:/mingw32/bin/../lib/gcc/mingw32/4.7.2/../../../../mingw32/lib/;t:/mingw32/bin/../lib/gcc/mingw32/4.7.2/../../../
COLLECT_GCC_OPTIONS='-v' '-E' '-mtune=i386' '-march=i386'

Two "/mingw/include" in Posix format in GCC! In practice GCC try to use
/mingw/include directory on current drive (in my case on drive T: ), but I may
have a different MinGW version installed there.