while make install firefox get libglib-2.0.so.400 not found

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../../dist/bin/xpidl -m header -w -I. -I../../dist/idl -o _xpidlgen/nsIConsoleLi
stener nsIConsoleListener.idl
/libexec/ld-elf.so.1: Shared object "libglib-2.0.so.400" not found, required by
"libIDL-2.so.0"
gmake[3]: *** [_xpidlgen/nsIConsoleListener.h] Error 1
gmake[3]: Leaving directory `/usr/ports/www/firefox/work/mozilla/xpcom/base'
gmake[2]: *** [export] Error 2
gmake[2]: Leaving directory `/usr/ports/www/firefox/work/mozilla/xpcom'
gmake[1]: *** [tier_2] Error 2
gmake[1]: Leaving directory `/usr/ports/www/firefox/work/mozilla'
gmake: *** [default] Error 2
*** Error code 2

Stop in /usr/ports/www/firefox.