我无法在Windows XP中安装Acts As Ferret。我的开发环境是，
当我运行命令gem install acts_as_ferret时，我收到以下错误。任何线索？
C:\TEMP\test\devkit>gem install acts_as_ferret
Building native extensions. This could take a while...
ERROR: Error installing acts_as_ferret:
ERROR: Failed to build gem native extension.
C:/Ruby187/bin/ruby.exe extconf.rb
creating Makefile
make
gcc -I. -I/C/Ruby187/lib/ruby/1.8/i386-mingw32 -I/C/Ruby187/lib/ruby/1.8/i386-mingw32 - I. -g -O2 -DFD_SETSIZE=256 -W
all -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=500 -c fs_store.c
fs_store.c: In function 'fs_store_new':
fs_store.c:431:17: warning: unused variable 'stt'
gcc -I. -I/C/Ruby187/lib/ruby/1.8/i386-mingw32 -I/C/Ruby187/lib/ruby/1.8/i386-mingw32 - I. -g -O2 -DFD_SETSIZE=256 -W
all -D_FILE_OFFSET_BITS=64 -D_XOPEN_SOURCE=500 -c global.c
global.c: In function 'signal_to_string':
global.c:412:14: error: 'SIGBUS' undeclared (first use in this function)
global.c:412:14: note: each undeclared identifier is reported only once for each function it appears in
global.c: In function 'frt_init':
global.c:436:22: error: storage size of 'action' isn't known
global.c:443:5: warning: implicit declaration of function 'sigemptyset'
global.c:446:5: error: storage size of '__old' isn't known
global.c:446:5: warning: implicit declaration of function 'sigaction'
global.c:446:5: warning: unused variable '__old'
global.c:447:5: error: storage size of '__old' isn't known
global.c:447:5: warning: unused variable '__old'
global.c:448:5: error: storage size of '__old' isn't known
global.c:448:5: warning: unused variable '__old'
global.c:449:5: error: storage size of '__old' isn't known
global.c:449:5: error: 'SIGBUS' undeclared (first use in this function)
global.c:449:5: warning: unused variable '__old'
global.c:450:5: error: storage size of '__old' isn't known
global.c:450:5: warning: unused variable '__old'
global.c:436:22: warning: unused variable 'action'
make: *** [global.o] Error 1
Gem files will remain installed in C:/Ruby187/lib/ruby/gems/1.8/gems/jk-ferret-0.11.8.3 for inspection.
Results logged to C:/Ruby187/lib/ruby/gems/1.8/gems/jk-ferret-0.11.8.3/ext/gem_make.out