From c6c133c637383b0a7606fe07b4fbc5d2f9b94228 Mon Sep 17 00:00:00 2001
From: Per Nilsson <per.nilsson@yubico.com>
Date: Tue, 4 Jan 2022 19:00:51 +0100
Subject: [PATCH] Show errors for dlopen and dlsym

---
 common/ecdh.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/common/ecdh.c b/common/ecdh.c
index f094b0a3..170d9174 100644
--- a/common/ecdh.c
+++ b/common/ecdh.c
@@ -1582,14 +1582,15 @@ int ecdh_load_module(const char *module, FILE *out) {
   if (strcmp(module, "-")) {
     module_handle = dlopen(module, RTLD_NOW | RTLD_GLOBAL);
     if (module_handle == 0) {
-      fprintf(out, "Can't open shared library '%s'\n", module);
+      fprintf(out, "Can't open shared library '%s': %s\n", module, dlerror());
       return CKR_ARGUMENTS_BAD;
     }
 
     CK_C_GetFunctionList fn = 0;
     *(void **) (&fn) = dlsym(module_handle, "C_GetFunctionList");
     if (fn == 0) {
-      fprintf(out, "Can't find symbol 'C_GetFunctionList' in '%s'\n", module);
+      fprintf(out, "Can't find symbol 'C_GetFunctionList' in '%s': %s\n",
+              module, dlerror());
       dlclose(module_handle);
       module_handle = 0;
       return CKR_GENERAL_ERROR;