[GCC-XML] Win7 + MinGW: "Compiler is not supported" error.

[petr at ohlidal.cz]

Hello GccXml team.

I'm trying to use gccxml on Win7 with MinGW compiler, but I always end 
up with this error:
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E:\Projects\gccxml\bat>gccxml --gccxml-compiler "g++" --gccxml-cxxargs 
"-iwrapper\"c:\Program Files (x86)\gccxml\share\gccxml-0.9\GCC\4.7\" 
-Ie:\Lib\OgreSDK_vc10_v1-8-1\boost 
-Ie:\Lib\OgreSDK_vc10_v1-8-1\include\OGRE" 
e:\Lib\OgreSDK_vc10_v1-8-1\include\OGRE\Ogre.h -fxml 
e:\projects\gccxml\ogre\Ogre.h.xml
error: could not identify compiler via -E preprocessing

m_GCCXML_COMPILER: g++
compilerName: g++
compilerID: ERROR_unsupported_compiler_in_gxConfiguration_GetCompilerId

Compiler "g++" is not supported by GCC_XML.
(gxConfiguration::FindFlags)
Could not determine GCCXML_FLAGS setting.
------------------------------------------

Since I wasn't sure if I'm specifying compiler params correctly, I also 
tried it this way:
------------------------------------------
E:\Projects\gccxml\bat>gccxml --gccxml-compiler "g++" 
-iwrapper"c:\Program Files (x86)\gccxml\share\gccxml-0.9\GCC\4.7" 
-I"e:\Lib\OgreSDK_vc10_v1-8-1\boost" 
-I"e:\Lib\OgreSDK_vc10_v1-8-1\include\OGRE" 
e:\Lib\OgreSDK_vc10_v1-8-1\include
------------------------------------------
Same result.

I've built gccxml from Git source a few days ago using vc10 and CMake 
2.8. In CMake, I left all values to their defaults. Then I opened 
<build_dir>/gccxml.sln, chose build configuration "Release", built 
BUILD_ALL project, then built INSTALL project. I've manually put gccxml 
to my PATH.

Prior to building gccxml, I installed MinGW 4.7.2 using mingw-get 
installer. I've manually put it in my PATH.

Following this post: 
http://www.cmake.org/pipermail/gccxml/2005-May/000618.html, I tried 
adding -iwrapper arg, even though I believe it's obsolete. No change.
The post also mentioned -D, but I didn't figure out what exactly to 
define. I tried a few macros but no luck.

I checked that g++ alone parses the same input without problems:
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E:\Projects\gccxml\bat>g++ -E -I"e:\Lib\OgreSDK_vc10_v1-8-1\boost" 
e:\Lib\OgreSDK_vc10_v1-8-1\include\OGRE\Ogre.h -o 
e:\projects\gccxml\ogre\gxx-E\Ogre.h
------------------------------------------
Worked fine.

Can you help me please? :)