From 20bcc7dfab7dd434e233e3a3c7c9d8945d087a65 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 29 Oct 2024 14:23:24 +0100
Subject: [PATCH] Print dlopen error on stderr

Otherwise a package that happens to try to load opencl to get
information (e.g. hwloc-calc) would spuriously emit output that disturbs
further processing, e.g.:

$ N=$(hwloc-calc all -N node)
$ echo "$N"
dlerror: libamd_comgr.so.2: cannot open shared object file: No such file or directory
2
---
 opencl/khronos/icd/loader/linux/icd_linux.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/opencl/khronos/icd/loader/linux/icd_linux.c b/opencl/khronos/icd/loader/linux/icd_linux.c
index 11693ecfd0..7dfcfec5be 100644
--- a/opencl/khronos/icd/loader/linux/icd_linux.c
+++ b/opencl/khronos/icd/loader/linux/icd_linux.c
@@ -175,7 +175,7 @@ void *khrIcdOsLibraryLoad(const char *libraryName)
     void *retVal = dlopen (libraryName, RTLD_NOW);
 
     if (NULL == retVal) {
-        printf("dlerror: %s\n", dlerror());
+        fprintf(stderr, "dlerror: %s\n", dlerror());
     }
 
     return retVal;