I set up delay loading in my plugin yesterday:
#ifdef _WIN32
#pragma warning (disable : 4100) /* Disable Unreferenced parameter warning */
#include <windows.h>
#include <delayimp.h>
#endif
...
// Configuration Properties / Linker / Input / Additional Dependencies: ./lib/libcurl.lib;./lib/libxml2.lib;./lib/iconv.lib;./lib/zlib1.lib;%(AdditionalDependencies)
// Configuration Properties / Linker / Input /Delay Loaded Dlls: libcurl;libxml2;iconv;zlib1;%(DelayLoadDLLs)
#include "curl.h"
#include "HTMLparser.h"
#include "xpath.h"
#ifdef _WIN32
#pragma comment(lib, "libcurl")
#pragma comment(lib, "iconv")
#pragma comment(lib, "libxml2")
#pragma comment(lib, "zlib1")
#endif
[1]
And I'm initializing the DLLs on plugin load:
#ifdef _WIN32
SetDllDirectory(L"./plugins/ts3websitepreview/");
if (FAILED(__HrLoadAllImportsForDll("libcurl.dll"))) {
ts3Functions.logMessage("Could not load curl.", LogLevel_ERROR, "Plugin", 0);
return 1;
}
if (FAILED(__HrLoadAllImportsForDll("libxml2.dll"))) {
ts3Functions.logMessage("Could not load libxml.", LogLevel_ERROR, "Plugin", 0);
return 1;
}
if (FAILED(__HrLoadAllImportsForDll("zlib1.dll"))) {
ts3Functions.logMessage("Could not load zlib1.", LogLevel_ERROR, "Plugin", 0);
return 1;
}
if (FAILED(__HrLoadAllImportsForDll("iconv.dll"))) {
ts3Functions.logMessage("Could not load iconv.", LogLevel_ERROR, "Plugin", 0);
return 1;
}
#endif
[2]
Here is my build log after adding the pragma statements:
1>------ Build started: Project: ts3websitepreview, Configuration: Debug Win32 ------
1>Build started 2016-06-15 06:35:23 PM.
1>InitializeBuildStatus:
1> Creating "Debug\ts3websitepreview.unsuccessfulbuild" because "AlwaysCreate" was specified.
1>ClCompile:
1> plugin.c
1>ManifestResourceCompile:
1> All outputs are up-to-date.
1>Link:
1> Creating library .\ts3websitepreview.lib and object .\ts3websitepreview.exp
1>LINK : warning LNK4199: /DELAYLOAD:libcurl ignored; no imports found from libcurl
1>LINK : warning LNK4199: /DELAYLOAD:libxml2 ignored; no imports found from libxml2
1>LINK : warning LNK4199: /DELAYLOAD:iconv ignored; no imports found from iconv
1>LINK : warning LNK4199: /DELAYLOAD:zlib1 ignored; no imports found from zlib1
1>Manifest:
1> All outputs are up-to-date.
1>LinkEmbedManifest:
1> All outputs are up-to-date.
1> ts3websitepreview.vcxproj -> .\ts3websitepreview.dll
1>FinalizeBuildStatus:
1> Deleting file "Debug\ts3websitepreview.unsuccessfulbuild".
1> Touching "Debug\ts3websitepreview.lastbuildstate".
1>
1>Build succeeded.
1>
1>Time Elapsed 00:00:01.60
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
Which immediately changed to:
1>------ Build started: Project: ts3websitepreview, Configuration: Debug Win32 ------
1>Build started 2016-06-15 06:39:54 PM.
1>InitializeBuildStatus:
1> Creating "Debug\ts3websitepreview.unsuccessfulbuild" because "AlwaysCreate" was specified.
1>ClCompile:
1> plugin.c
1>ManifestResourceCompile:
1> All outputs are up-to-date.
1>Manifest:
1> All outputs are up-to-date.
1>LinkEmbedManifest:
1> All outputs are up-to-date.
1> ts3websitepreview.vcxproj -> .\ts3websitepreview.dll
1>FinalizeBuildStatus:
1> Deleting file "Debug\ts3websitepreview.unsuccessfulbuild".
1> Touching "Debug\ts3websitepreview.lastbuildstate".
1>
1>Build succeeded.
1>
1>Time Elapsed 00:00:00.71
========== Build: 1 succeeded, 0 failed, 0 up-to-date, 0 skipped ==========
After another build with no changes to the code.
But instead, it's still trying to load the DLL before the plugin even initializes, giving me a:
ts3client_win32.exe - System Error
The program can't start because libcurl.dll is missing from your computer. Try reinstalling the program to fix this problem.
I used the tutorials here and here for delayed loading. I've also read the questions here, here, here, and here but none have solved my problem.
Don't forget to include the
"*.dll"
extension. In linker option you must specify the following:libcurl.dll;libxml2.dll;zlib1.dll;iconv.dll;
If you use
#pragma comment(lib, "libcurl")
then you don't have to specify it a second time in linker option.SetDllDirectory(L"./plugins/ts3websitepreview/");
should be sufficient. You don't need__HrLoadAllImportsForDll
.If you want to call DLL's
DLL_PROCESS_ATTACH
ahead of time, then useLoadLibrary
instead.