[PATCH 0/1] MR6543: ntdll: Print error on failure to dlopen builtin shared object.

[Bernhard Übelacker (＠bernhardu)]

Currently trying to dlopen winealsa.so, without having the
matching libasound.so.2 installed, fails silently.
This should make users aware of the missing dependency.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57206

[PATCH 1/1] ntdll: Print error on failure to dlopen builtin shared object.

[Bernhard Übelacker]

From: Bernhard Übelacker

Currently trying to dlopen winealsa.so, without having the
matching libasound.so.2 installed, fails silently.
This should make users aware of the missing dependency.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=57206
---
 dlls/ntdll/unix/virtual.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/unix/virtual.c b/dlls/ntdll/unix/virtual.c
index e168eed8c37..34944c85253 100644
--- a/dlls/ntdll/unix/virtual.c
+++ b/dlls/ntdll/unix/virtual.c
@@ -650,8 +650,11 @@ static NTSTATUS get_builtin_unix_funcs( void *module, BOOL wow, const void **fun
     LIST_FOR_EACH_ENTRY( builtin, &builtin_modules, struct builtin_module, entry )
     {
         if (builtin->module != module) continue;
-        if (builtin->unix_path && !builtin->unix_handle)
+        if (builtin->unix_path && !builtin->unix_handle) {
             builtin->unix_handle = dlopen( builtin->unix_path, RTLD_NOW );
+            if (!builtin->unix_handle)
+                ERR_(module)( "failed to load %s\n", builtin->unix_path );
+        }
         if (builtin->unix_handle)
         {
             *funcs = dlsym( builtin->unix_handle, ptr_name );

[Alexandre Julliard (＠julliard)]

Like normal dlls, a load failure is not necessarily an error. This should be printed in the higher level modules in the cases where it's actually a problem.

[Bernhard Übelacker (＠bernhardu)]

On Mon Sep 23 20:32:47 2024 +0000, Alexandre Julliard wrote:
> Like normal dlls, a load failure is not necessarily an error. This
> should be printed in the higher level modules in the cases where it's
> actually a problem.

Thanks for looking into it.

I tried to identify the higher levels.

* [dlls/ntdll/unix/virtual.c](https://gitlab.winehq.org/wine/wine/-/blob/42af68b8b7cf066a1738c483e8ea1b5bf...)
* [dlls/winealsa.drv/mmdevdrv.c](https://gitlab.winehq.org/wine/wine/-/blob/42af68b8b7cf066a1738c483e8ea1b5bf...):
* [dlls/mmdevapi/main.c](https://gitlab.winehq.org/wine/wine/-/blob/42af68b8b7cf066a1738c483e8ea1b5bf...)

What about adding the ERR in mmdevapi when no driver succeeds,
and changing the ERR in `get_builtin_unix_funcs` to a WARN_(module),
and adding an additional WARN_(module) to winealsa (and pulse, oss, and coredrive)?

That way the default output should just get the additional line if no audio driver is loaded, and the user could proceed by WINEDEBUG=warn+module?