gcc build process not finding gcc/config/i386

[Jonathan Wilson]

I am building with these settings:
sh ../gcc/configure --srcdir=../gcc --with-gcc --with-gnu-ld --with-gnu-as 
--host=mingw32 --build=mingw32 --target=mingw32 --prefix=/mingw 
--enable-threads --disable-nls --enable-languages=c,c++,objc,f77 
--disable-win32-registry --disable-shared --enable-sjlj-exceptions 
--disable-libstdcxx-pch --enable-threads=win32
build enviroment is msys + msysdtk + mingw32
source is in c:\gcc
objdir is c:\gccobj
build fails with "cant find <some header file thats in gcc/config/i386>"
symlinking c:\gcc\gcc\config\i386 to c:\gccobj\gcc\config\i386 worked and 
enabled the build to continue but I would like to know what could be 
causing the problem in the first place...

IIRC, it was libgcc2 that complained...