From 14be14f3374cae9cd5aa734af491afdaa9d66aca Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Thu, 1 May 2025 19:45:19 +0900
Subject: [PATCH] aot_create_comp_context: disable small data section

I observed errors like the following when trying to upgrade our
LLVM from 15 to 19.

```
AOT module load failed: resolve symbol .srodata.cst8 failed
```

The concept itself has been available since LLVM 9.
I don't know what exactly happened to trigger the use of it.

cf. https://reviews.llvm.org/D57493
---
 core/iwasm/compilation/aot_llvm.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/core/iwasm/compilation/aot_llvm.c b/core/iwasm/compilation/aot_llvm.c
index c1708e3f9..9fa415a6d 100644
--- a/core/iwasm/compilation/aot_llvm.c
+++ b/core/iwasm/compilation/aot_llvm.c
@@ -2617,6 +2617,15 @@ aot_create_comp_context(const AOTCompData *comp_data, aot_comp_option_t option)
         goto fail;
     }
 
+#if LLVM_VERSION_MAJOR >= 9
+    /* Disable small data section as our emitter/loader doesn't support it.
+     * https://reviews.llvm.org/D57493 */
+    LLVMAddModuleFlag(
+        comp_ctx->module, LLVMModuleFlagBehaviorWarning, "SmallDataLimit",
+        strlen("SmallDataLimit"),
+        LLVMValueAsMetadata(LLVMConstInt(LLVMInt32Type(), 0, false)));
+#endif
+
 #if WASM_ENABLE_DEBUG_AOT != 0
     if (!(comp_ctx->debug_builder = LLVMCreateDIBuilder(comp_ctx->module))) {
         aot_set_last_error("create LLVM Debug Infor builder failed.");