Windows install problem

[bryn]

Any idea on what's causing the following error?

---

C:\Documents and Settings\acme>gem install SystemTimer
Building native extensions. This could take a while...
ERROR: Error installing SystemTimer:
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 -c system_timer_native.c
system_timer_native.c: In function install_first_timer_and_save_original_configuration': system_timer_native.c:39: error: storage size of 'timer_interval' isn't known system_timer_native.c:48: error:SIG_BLOCK' undeclared (first use in this function)
system_timer_native.c:48: error: (Each undeclared identifier is reported only once
system_timer_native.c:48: error: for each function it appears in.)
system_timer_native.c:59: error: invalid use of undefined type struct sigaction' system_timer_native.c:60: error:SIGALRM' undeclared (first use in this function)
system_timer_native.c:77: error: ITIMER_REAL' undeclared (first use in this function) system_timer_native.c:91: error:SIG_UNBLOCK' undeclared (first use in this function)
system_timer_native.c: In function install_next_timer': system_timer_native.c:104: error: storage size of 'timer_interval' isn't known system_timer_native.c:114: error:SIG_BLOCK' undeclared (first use in this function)
system_timer_native.c:125: error: ITIMER_REAL' undeclared (first use in this function) system_timer_native.c:138: error:SIG_UNBLOCK' undeclared (first use in this function)
system_timer_native.c: In function restore_original_configuration': system_timer_native.c:152: error:SIG_BLOCK' undeclared (first use in this function)
system_timer_native.c:163: error: invalid use of undefined type struct sigaction' system_timer_native.c:165: error:SIGALRM' undeclared (first use in this function)
system_timer_native.c:170: error: invalid use of undefined type struct sigaction' system_timer_native.c: In functionrestore_original_timer_interval':
system_timer_native.c:185: error: ITIMER_REAL' undeclared (first use in this function) system_timer_native.c: In functionrestore_sigalrm_mask':
system_timer_native.c:193: error: SIGALRM' undeclared (first use in this function) system_timer_native.c:194: error:SIG_UNBLOCK' undeclared (first use in this function)
system_timer_native.c: In function init_sigalarm_mask': system_timer_native.c:268: error:SIGALRM' undeclared (first use in this function)
system_timer_native.c: In function set_itimerval': system_timer_native.c:288: error: dereferencing pointer to incomplete type system_timer_native.c:289: error: dereferencing pointer to incomplete type system_timer_native.c:290: error: dereferencing pointer to incomplete type system_timer_native.c:291: error: dereferencing pointer to incomplete type system_timer_native.c:291: error: dereferencing pointer to incomplete type system_timer_native.c:294: error: dereferencing pointer to incomplete type system_timer_native.c:295: error: dereferencing pointer to incomplete type system_timer_native.c: At top level: system_timer_native.c:21: error: storage size oforiginal_signal_handler' isn't known
system_timer_native.c:22: error: storage size of `original_timer_interval' isn't known
make: *** [system_timer_native.o] Error 1

[banta]

I'm also having the same problem, but will figure it out