improve support for MSYS2 - close #120

build_tests/configure/check_d_import_d_import_path.rb

@@ -1,4 +1,5 @@
 configure do
+  check_d_compiler
   check_d_import "std.stdio", check_d_import_path: ["./usr1"]
   check_d_import "frobulous", check_d_import_path: ["./usr2"]
 end

build_tests/configure/check_d_import_success.rb

@@ -1,3 +1,4 @@
 configure do
+  check_d_compiler
   check_d_import "std.stdio"
 end

build_tests/install_running_exe/Rsconscript

@@ -1,6 +0,0 @@
-build do
-  Environment.new do |env|
-    env.Program("program.exe", "program.c")
-    env.Install("install/program.exe", "program.exe")
-  end
-end

build_tests/install_running_exe/program.c

@@ -1,8 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-
-int main(int argc, char * argv[])
-{
-    sleep(2);
-    return 0;
-}