Bug in gnatmake

[Nicolas BRUNOT]

It seems there is a bug in gnatmake when the link argument is too long
This can be checked on Linux Redhat 7.0, Windows cygwin and Windows mingw32
with the following command

gnatmake whatever.adb -largs -L/usr/X11R6/lib -lX11 -lX11 -lX11 -lX11 -lX11
-lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11
-lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11 -lX11

that comes probably from the Linker_Switches declared in
gcc/gcc/ada/make.ads