Use __WINDOWS__ instead of _WIN32.

This commit was SVN r8479.

test/support/components.c

@@ -130,7 +130,7 @@ static bool try_dlopen(const char *dir, const char *fw, const char *comp,
 {
     char component_name[BUFSIZ];
     char file_name[BUFSIZ];
-#ifdef WIN32
+#ifdef __WINDOWS__
     char dirsep = '\\';
 #else
     char dirsep = '/';
@@ -184,7 +184,7 @@ static char *dir_concat(const char *a, const char *b)
     name[0] = '\0';
     if (NULL != a) {
         strcat(name, a);
-#ifdef WIN32
+#ifdef __WINDOWS__
         strcat(name, "\\");
 #else
         strcat(name, "/");

test/util/opal_basename.c

@@ -44,7 +44,7 @@ int main(int argc, char* argv[])
   test("/yow.c/", "yow.c");
   test("//", "/");
 
-#ifdef WIN32
+#ifdef __WINDOWS__
   test("C:\\foo\\bar\\baz", "baz");
   test("D:foo.txt", "foo.txt");
   test("E:\\yow.c", "yow.c");

test/util/opal_os_create_dirpath.c

@@ -35,7 +35,7 @@
 #include "opal/util/os_path.h"
 #include "opal/util/os_create_dirpath.h"
 
-#ifdef WIN32
+#ifdef __WINDOWS__
 #define PATH_SEP "\\"
 #else
 #define PATH_SEP "/"

test/util/opal_os_path.c

@@ -28,7 +28,7 @@
 #include "opal/util/os_path.h"
 #include "support.h"
 
-#ifdef WIN32
+#ifdef __WINDOWS__
 #define PATH_SEP "\\"
 #else
 #define PATH_SEP "/"