Case sensitivity issue with gtk+2-2.14.3-1

(OS 10.5.5)
I'll quote the line before the error for context:

gcc -dynamiclib ${wl}-undefined ${wl}dynamic_lookup -o .libs/libgdk- 
x11-2.0.0.1400.3.dylib  .libs/gdk.o .libs/gdkapplaunchcontext.o .libs/ 
gdkcairo.o .libs/gdkcolor.o .libs/gdkcursor.o .libs/gdkdisplay.o .libs/ 
gdkdisplaymanager.o .libs/gdkdnd.o .libs/gdkdraw.o .libs/ 
gdkevents.o .libs/gdkfont.o .libs/gdkgc.o .libs/gdkglobals.o .libs/ 
gdkimage.o .libs/gdkkeys.o .libs/gdkkeyuni.o .libs/gdkpango.o .libs/ 
gdkpixbuf-drawable.o .libs/gdkpixbuf-render.o .libs/gdkpixmap.o .libs/ 
gdkpolyreg-generic.o .libs/gdkrectangle.o .libs/gdkregion- 
generic.o .libs/gdkrgb.o .libs/gdkscreen.o .libs/gdkselection.o .libs/ 
gdkvisual.o .libs/gdkwindow.o .libs/gdkwindowimpl.o .libs/ 
gdkenumtypes.o  .libs/libgdk-x11-2.0.lax/libgdk-x11.a/ 
gdkapplaunchcontext-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/ 
gdkasync.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkcolor-x11.o .libs/ 
libgdk-x11-2.0.lax/libgdk-x11.a/gdkcursor-x11.o .libs/libgdk- 
x11-2.0.lax/libgdk-x11.a/gdkdisplay-x11.o .libs/libgdk-x11-2.0.lax/ 
libgdk-x11.a/gdkdnd-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/ 
gdkdrawable-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkevents- 
x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkfont-x11.o .libs/libgdk- 
x11-2.0.lax/libgdk-x11.a/gdkgc-x11.o .libs/libgdk-x11-2.0.lax/libgdk- 
x11.a/gdkgeometry-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/ 
gdkglobals-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkim- 
x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkimage-x11.o .libs/ 
libgdk-x11-2.0.lax/libgdk-x11.a/gdkinput-none.o .libs/libgdk- 
x11-2.0.lax/libgdk-x11.a/gdkinput.o .libs/libgdk-x11-2.0.lax/libgdk- 
x11.a/gdkkeys-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkmain- 
x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkpixmap-x11.o .libs/ 
libgdk-x11-2.0.lax/libgdk-x11.a/gdkproperty-x11.o .libs/libgdk- 
x11-2.0.lax/libgdk-x11.a/gdkscreen-x11.o .libs/libgdk-x11-2.0.lax/ 
libgdk-x11.a/gdkselection-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/ 
gdkspawn-x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdktestutils- 
x11.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/gdkvisual-x11.o .libs/ 
libgdk-x11-2.0.lax/libgdk-x11.a/gdkwindow-x11.o .libs/libgdk- 
x11-2.0.lax/libgdk-x11.a/gdkxftdefaults.o .libs/libgdk-x11-2.0.lax/ 
libgdk-x11.a/gdkxid.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/xsettings- 
client.o .libs/libgdk-x11-2.0.lax/libgdk-x11.a/xsettings-common.o   -L/ 
sw/lib/fontconfig2/lib -L/sw/lib -lXRender -L/sw/lib/pango-ft219/lib - 
L/usr/X11/lib /sw/lib/pango-ft219/lib/libpangocairo-1.0.dylib -L/sw/ 
lib/freetype219/lib -L/usr/lib /sw/lib/pango-ft219/lib/ 
libpango-1.0.dylib /sw/lib/libcairo.dylib /sw/lib/libgio-2.0.dylib /sw/ 
lib/libgobject-2.0.dylib /sw/lib/libgmodule-2.0.dylib /sw/lib/ 
libglib-2.0.dylib /sw/lib/libintl.dylib /sw/lib/fontconfig2/lib/ 
libfontconfig.dylib /usr/X11/lib/libXext.6.4.0.dylib /usr/X11/lib/ 
libXrender.1.3.0.dylib /usr/X11/lib/libX11.6.2.0.dylib /usr/X11/lib/ 
libXinerama.1.0.0.dylib /usr/X11/lib/libXrandr.2.1.0.dylib /usr/X11/ 
lib/libXcursor.1.0.2.dylib /usr/X11/lib/libXcomposite.1.0.0.dylib /usr/ 
X11/lib/libXdamage.1.1.0.dylib /usr/X11/lib/libXfixes.3.1.0.dylib - 
lm ../gdk-pixbuf/.libs/libgdk_pixbuf-2.0.dylib  -install_name  /sw/lib/ 
libgdk-x11-2.0.0.dylib -compatibility_version 1401 -current_version  
1401.3 -Wl,-single_module -Wl,-exported_symbols_list,.libs/libgdk- 
x11-2.0-symbols.expsym
ld: library not found for -lXRender

And indeed, I have no libXRender.dylib, but rather libXrender.dylib .

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