Added llvm.core.load_library_permanently() (Issue #12).

git-svn-id: http://llvm-py.googlecode.com/svn/trunk@46 8d1e9007-1d4e-0410-b67e-1979fd6579aa

llvm/extra.cpp

@@ -21,6 +21,7 @@
 #include "llvm/IntrinsicInst.h"
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Assembly/Parser.h"
+#include "llvm/System/DynamicLibrary.h"
 // +includes for passes
 #include "llvm/PassManager.h"
 #include "llvm/Analysis/LoopPass.h"
@@ -198,6 +199,20 @@ unsigned char *LLVMGetBitcodeFromModule(LLVMModuleRef M, unsigned *Len)
     return bytes;
 }
 
+/* Return 0 on failure (with ErrMsg filled in), 1 on success. */
+unsigned LLVMLoadLibraryPermanently(const char* filename, char **ErrMsg)
+{
+    std::string msg;
+ 
+    /* Note: the LLVM API returns true on failure. Don't ask why. */
+    if (sys::DynamicLibrary::LoadLibraryPermanently(filename, &msg)) {
+        *ErrMsg = strdup(msg.c_str());
+        return 0;
+    }
+
+    return 1;
+}
+
 /* passes */
 
 #define define_pass(P)                              \