Allow different ways to manipulate environment for XP vs 64-bit

Commit fa147bd 'Use putenv to implement unsetenv/clearenv' allowed
BusyBox to run on ReactOS but broke it on Windows XP so it was
reverted.

It turns out that the same change is required on 64-bit Windows.
Reinstate the 'safe' environment manipulation code but make it a
configuration option.  Add a config file for 64-bit Windows that
does the right thing.

1 files changed, 8 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index a32d78ad0..fa760342b 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -192,13 +192,21 @@ int mingw_system(const char *cmd);
 
 int clearenv(void);
 char *mingw_getenv(const char *name);
+int mingw_putenv(const char *env);
 char *mingw_mktemp(char *template);
 int mkstemp(char *template);
 char *realpath(const char *path, char *resolved_path);
 int setenv(const char *name, const char *value, int replace);
+#if ENABLE_SAFE_ENV
+int unsetenv(const char *env);
+#else
 void unsetenv(const char *env);
+#endif
 
 #define getenv mingw_getenv
+#if ENABLE_SAFE_ENV
+#define putenv mingw_putenv
+#endif
 #define mktemp mingw_mktemp
 
 /*