gcc does not execute - why ?

[Luca Bottura]

I have a puzzling behaviour trying to run gcc (and the other gnu 
compilers) right after installing cygwing 1.7.1 on Pentium running XP, 
and adding gcc (using the gcc installer helper for the selection of 
packages in setup). The command

gcc-3 test.c

is executed but has no effect. No object, no executable, no message. 
Checking after the command the content of $? I get an exit code 1.

echo $?
1

Asking for compilation with -pass-exit-codes I get an highest exit code 127

gcc-3 -pass-exit-codes test.c
echo $?
127

I have apparently all the programs in place, i.e.

/lib/gcc/i686-pc-cygwin/3.4.4/cc1.exe
/lib/gcc/i686-pc-cygwin/3.4.4/f771.exe (I wish to compile with g77 as well)
/lib/gcc/i686-pc-cygwin/3.4.4/collect2.exe

and /lib/gcc/i686-pc-cygwin/3.4.4/ is in the path of the programs for 
the gcc front-end (checked with -print-search-dirs).

I am at loss... Any hint of what may be wrong in the installation ?

Many thanks, Luca

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