pkg-config.exe problem

[gedeon dot legaut at tele2 dot fr]

Hello,
I working with cygwin installed from www.cygwin.com and 
glade installed from www.gladewin32.sourceforge.net and I 
have a pb with pkg-config.exe :

*) pkg-config.exe --cflags gtk+-2.0 gives

Package gtk+-2.0 was not found in the pkg-config search 
path.
Perhaps you should add the directory containing 
`gtk+-2.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-2.0' found

*) echo $PKG_CONFIG_PATH gives

/cygdrive/f/GTK/lib/pkgconfig

*) ls `echo $PKG_CONFIG_PATH` gives

atk.pc
cairo.pc
fontconfig.pc
freetype2.pc
gdk-2.0.pc
gdk-pixbuf-2.0.pc
gdk-win32-2.0.pc
gdkglext-1.0.pc
gdkglext-win32-1.0.pc
glib-2.0.pc
gmodule-2.0.pc
gmodule-export-2.0.pc
gmodule-no-export-2.0.pc
gobject-2.0.pc
gthread-2.0.pc
gtk+-2.0.pc
gtk+-win32-2.0.pc
gtk-engines-2.pc
gtkglext-1.0.pc
gtkglext-win32-1.0.pc
libart-2.0.pc
libglade-2.0.pc
libpng.pc
libpng13.pc
libxml-2.0.pc
pango.pc
pangocairo.pc
pangoft2.pc
pangowin32.pc

an idea what's wrong ?
Thank's
Gédéon

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