dlhandle: suppress DLL errors on Windows (#2389)

Signed-off-by: Jared Van Bortel <jared@nomic.ai>

gpt4all-backend/dlhandle.cpp

@@ -1,8 +1,11 @@
 #include "dlhandle.h"
 
+#include <string>
+
 #ifndef _WIN32
 #   include <dlfcn.h>
 #else
+#   include <cassert>
 #   include <sstream>
 #   define WIN32_LEAN_AND_MEAN
 #   ifndef NOMINMAX
@@ -11,6 +14,7 @@
 #   include <windows.h>
 #endif
 
+using namespace std::string_literals;
 namespace fs = std::filesystem;
 
 
@@ -19,7 +23,7 @@ namespace fs = std::filesystem;
 Dlhandle::Dlhandle(const fs::path &fpath) {
     chandle = dlopen(fpath.c_str(), RTLD_LAZY | RTLD_LOCAL);
     if (!chandle) {
-        throw Exception("dlopen(\"" + fpath.filename().string() + "\"): " + dlerror());
+        throw Exception("dlopen: "s + dlerror());
     }
 }
 
@@ -34,13 +38,22 @@ void *Dlhandle::get_internal(const char *symbol) const {
 #else // defined(_WIN32)
 
 Dlhandle::Dlhandle(const fs::path &fpath) {
-    auto afpath = fs::absolute(fpath);
+    fs::path afpath = fs::absolute(fpath);
+
+    // Suppress the "Entry Point Not Found" dialog, caused by outdated nvcuda.dll from the GPU driver
+    UINT lastErrorMode = GetErrorMode();
+    UINT success = SetErrorMode(lastErrorMode | SEM_FAILCRITICALERRORS);
+    assert(success);
+
     chandle = LoadLibraryExW(afpath.c_str(), NULL, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS | LOAD_LIBRARY_SEARCH_DLL_LOAD_DIR);
 
+    success = SetErrorMode(lastErrorMode);
+    assert(success);
+
     if (!chandle) {
-        auto err = GetLastError();
+        DWORD err = GetLastError();
         std::ostringstream ss;
-        ss << "LoadLibraryExW(\"" << fpath.filename().string() << "\") failed with error 0x" << std::hex << err;
+        ss << "LoadLibraryExW failed with error 0x" << std::hex << err;
         throw Exception(ss.str());
     }
 }