matchbox-desktop segmentation fault

Hi!
    We try to port matchbox into an ARM evm, but we got "Segmentation 
fault" while executing matchbox-desktop.  Here is a backtrace while we 
got SIGSEGV signal.

#0  0x403b0880 in _int_free () from /lib/libc.so.6
#1  0x403af49c in free () from /lib/libc.so.6
#2  0x4018e0a0 in FcStrFree () from /usr/lib/libfontconfig.so.1
#3  0x4018dc90 in FcConfigParseAndLoad () from /usr/lib/libfontconfig.so.1
#4  0x401999ec in FcInitLoadConfig () from /usr/lib/libfontconfig.so.1
#5  0x40199a38 in FcInitLoadConfigAndFonts () from 
/usr/lib/libfontconfig.so.1
#6  0x40199ad0 in FcInit () from /usr/lib/libfontconfig.so.1
#7  0x40060460 in XftInit (config=0x4046be8c "\001") at xftinit.c:35
#8  0x4005d364 in XftFontMatch (dpy=0x1b1b0, screen=0, pattern=0x1fde8,
    result=0xbefffa84) at xftfont.c:36
#9  0x4005d500 in XftFontOpen (dpy=0x1b1b0, screen=0) at xftfont.c:89
#10 0x40031bfc in _mb_font_load (font=0x1fd90) at mbexp.c:343
Cannot access memory at address 0xb4

Can anyone kindly tell us what happen and how to resolve ?

Thanks!

Regard,
Jeffery Huang