Fixes to assist building Rubinius under Alpine Linux (with musl).

CpuID · Yorick Peterse · commit 2920c9e09036 · 2015-10-05T01:33:39.000+02:00
Not 100% building yet, but these cover some outstanding issues
diff --git a/rakelib/platform.rake b/rakelib/platform.rake
@@ -752,7 +752,7 @@ file 'runtime/platform.conf' => deps do |task|
 
     Rubinius::FFI::Generators::Constants.new 'rbx.platform.signal' do |cg|
       cg.include 'signal.h'
-      unless BUILD_CONFIG[:windows]
+      unless BUILD_CONFIG[:windows] or RUBY_PLATFORM.match(/linux-musl$/)
         cg.include 'sys/signal.h'
       end
 
diff --git a/vm/util/logger.cpp b/vm/util/logger.cpp
@@ -10,6 +10,7 @@
 #include <time.h>
 #include <sys/param.h>
 #include <sys/stat.h>
+#include <sys/file.h>
 
 #include <zlib.h>
 
