[arch-general] fvwm-devel's dependencies

[大熊]

I want to install the fvwm-devel, but why it depend on gtk 1.2.10-10?

** fvwm-devel  Dependencies (7):
* fribidi
* imlib
* librsvg
* libstroke
* libxpm
* perl
* readline>=6.0.00

when I ask some ubuntu user, they say fvwm is only depended on gtk2 under
ubuntu.

libc6 (>= 2.4), libcairo2 (>= 1.2.4), libfontconfig1 (>= 2.4.0),
libfreetype6 (>= 2.2.1), libfribidi0 (>= 0.10.9), libglib2.0-0 (>=
2.12.0), libgtk2.0-0 (>= 2.17.0), libice6 (>= 1:1.0.0), libncurses5
(>= 5.6+20071006-3), libpng12-0 (>= 1.2.13-4), libreadline5 (>= 5.2),
librplay3 (>= 3.3.2-2), librsvg2-2 (>= 2.26.0), libsm6, libstroke0
(>= 0.5.1), libx11-6, libxcursor1 (> 1.1.2), libxext6, libxft2 (>
2.1.1), libxinerama1, libxpm4, libxrender1, zlib1g (>= 1:1.1.4)

what is the different from arch and ubunut's packaging?