From 0d845e4a071f67de40e1151cafb419c7aba87050 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Mon, 16 Mar 2026 11:35:06 -0700
Subject: merge revision(s) 361644c0cce3235e9cc6724994c6b5711deb10b8: [Backport
 #21917]

	[PATCH] [Bug #21917] Fix build on AIX
---
 dln.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/dln.c b/dln.c
index 2549f03183..d43735fec9 100644
--- a/dln.c
+++ b/dln.c
@@ -348,6 +348,7 @@ dln_open(const char *file)
     void *handle;
 
 #if defined(_WIN32)
+# define DLN_DEFINED
     char message[1024];
 
     /* Convert the file path to wide char */
@@ -374,6 +375,7 @@ dln_open(const char *file)
 # endif
 
 #elif defined(USE_DLN_DLOPEN)
+# define DLN_DEFINED
 
 # ifndef RTLD_LAZY
 #  define RTLD_LAZY 1
@@ -505,7 +507,7 @@ abi_check_enabled_p(void)
 static void *
 dln_load_and_init(const char *file, const char *init_fct_name)
 {
-#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
+#if defined(DLN_DEFINED)
     void *handle = dln_open(file);
 
 #ifdef RUBY_DLN_CHECK_ABI
@@ -523,6 +525,7 @@ dln_load_and_init(const char *file, const char *init_fct_name)
     return handle;
 
 #elif defined(_AIX)
+# define DLN_DEFINED
     {
         void (*init_fct)(void);
 
@@ -560,7 +563,7 @@ dln_load(const char *file)
 void *
 dln_load_feature(const char *file, const char *fname)
 {
-#if defined(_WIN32) || defined(USE_DLN_DLOPEN)
+#if defined(DLN_DEFINED)
     char *init_fct_name;
     init_funcname(&init_fct_name, fname);
     return dln_load_and_init(file, init_fct_name);
-- 
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