Don't do libffi detection if cross-compiling for win32.

1 files changed, 8 insertions, 6 deletions

diff --git a/ext/ffi_c/extconf.rb b/ext/ffi_c/extconf.rb
index 17b6b2c..de3b4b4 100644
--- a/ext/ffi_c/extconf.rb
+++ b/ext/ffi_c/extconf.rb
@@ -3,12 +3,14 @@ require 'mkmf'
 require 'rbconfig'
 dir_config("ffi_c")
 
-pkg_config("libffi")
-have_ffi_call = have_library("ffi", "ffi_call", [ "ffi.h" ])
-have_prep_closure = have_func("ffi_prep_closure")
-libffi_ok = have_ffi_call && have_prep_closure
-$defs << "-DHAVE_LIBFFI" if libffi_ok
-$defs << "-DHAVE_RAW_API" if have_func("ffi_raw_call") && have_func("ffi_prep_raw_closure")
+unless Config::CONFIG['host_os'] =~ /mswin32|mingw32/
+  pkg_config("libffi")
+  have_ffi_call = have_library("ffi", "ffi_call", [ "ffi.h" ])
+  have_prep_closure = have_func("ffi_prep_closure")
+  libffi_ok = have_ffi_call && have_prep_closure
+  $defs << "-DHAVE_LIBFFI" if libffi_ok
+  $defs << "-DHAVE_RAW_API" if have_func("ffi_raw_call") && have_func("ffi_prep_raw_closure")
+end
 have_func('rb_thread_blocking_region')
 
 $defs << "-DHAVE_EXTCONF_H" if $defs.empty? # needed so create_header works