problem with cross-compilation i686-pc-mingw32

[#Cyrille37#]

Hello
I could not find how to setup cygwin to make cross compilation for host 
i686-pc-mingw32.

I've got packages like :
gcc                  3.4.4-3
gcc-core             3.4.4-3
gcc-g++              3.4.4-3
gcc-mingw            20040810-1
gcc-mingw-core       20050522-1
gcc-mingw-g++        20050522-1

but when running the configure for GMPlib it could not find some tools :

$ ./configure --build=core2-pc-cygwin --host=i686-pc-mingw32 
--enable-cxx --disable-static --enable-shared
checking build system type... core2-pc-cygwin
checking host system type... i686-pc-mingw32
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for i686-pc-mingw32-strip... no
checking for strip... strip
checking whether to enable maintainer-specific portions of Makefiles... no
checking ABI=32
checking compiler i686-pc-mingw32-gcc -m32 -O2 -fomit-frame-pointer ... no
checking compiler i686-pc-mingw32-gcc -O2 -fomit-frame-pointer ... no
checking compiler gcc -m32 -O2 -fomit-frame-pointer ... yes
checking compiler gcc -m32 -O2 -fomit-frame-pointer has 
sizeof(long)==4... yes
...
checking for i686-pc-mingw32-g++... no
checking for i686-pc-mingw32-c++... no
checking for i686-pc-mingw32-gpp... no
checking for i686-pc-mingw32-aCC... no
checking for i686-pc-mingw32-CC... no
checking for i686-pc-mingw32-cxx... no
checking for i686-pc-mingw32-cc++... no
checking for i686-pc-mingw32-cl... no
checking for i686-pc-mingw32-FCC... no
checking for i686-pc-mingw32-KCC... no
checking for i686-pc-mingw32-RCC... no
checking for i686-pc-mingw32-xlC_r... no
checking for i686-pc-mingw32-xlC... no
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
...

Do you know which packages are missing in my cygwin installation ?

Thanks
Cyrille


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