From 5910e5cd2134b20d7c7a7fb8ff6d360760463148 Mon Sep 17 00:00:00 2001
From: "liang.he" <liang.he@intel.com>
Date: Tue, 6 May 2025 06:56:06 +0800
Subject: [PATCH] Use --target to pass a triple in wamrc (#4199)

Provide a triple string in the format of <arch>-<vendor>-<os>-<abi>
via --target.
---
 core/iwasm/compilation/aot_llvm.c | 22 ++++++++++++++++++----
 wamr-compiler/main.c              |  3 +++
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/core/iwasm/compilation/aot_llvm.c b/core/iwasm/compilation/aot_llvm.c
index 9270f0efe..c1708e3f9 100644
--- a/core/iwasm/compilation/aot_llvm.c
+++ b/core/iwasm/compilation/aot_llvm.c
@@ -2742,10 +2742,23 @@ aot_create_comp_context(const AOTCompData *comp_data, aot_comp_option_t option)
     }
     else {
         /* Create LLVM target machine */
-        arch = option->target_arch;
-        abi = option->target_abi;
-        cpu = option->target_cpu;
-        features = option->cpu_features;
+        if (!option->target_arch || !strstr(option->target_arch, "-")) {
+            /* Retrieve the target triple based on user input */
+            triple = NULL;
+            arch = option->target_arch;
+            abi = option->target_abi;
+            cpu = option->target_cpu;
+            features = option->cpu_features;
+        }
+        else {
+            /* Form a target triple */
+            triple = option->target_arch;
+            arch = NULL;
+            abi = NULL;
+            cpu = NULL;
+            features = NULL;
+        }
+
         opt_level = option->opt_level;
         size_level = option->size_level;
 
@@ -2986,6 +2999,7 @@ aot_create_comp_context(const AOTCompData *comp_data, aot_comp_option_t option)
                 aot_set_last_error(buf);
                 goto fail;
             }
+            LOG_VERBOSE("triple: %s => normailized: %s", triple, triple_norm);
             if (!cpu)
                 cpu = "";
         }
diff --git a/wamr-compiler/main.c b/wamr-compiler/main.c
index 312231619..4d1a24b54 100644
--- a/wamr-compiler/main.c
+++ b/wamr-compiler/main.c
@@ -116,6 +116,9 @@ print_help()
     printf("                              Default is host arch, e.g. x86_64\n");
     printf("                            <sub> = for ex. on arm or thumb: v5, v6m, v7a, v7m, etc.\n");
     printf("                            Use --target=help to list supported targets\n");
+    printf("                            Or, provide a triple in the format of <arch>-<vendor>-<os>-<abi>.\n");
+    printf("                            By doing this, --target-abi, --cpu, and --cpu-features will be ignored.\n");
+    printf("                            The triple will only be normalized without any further verification.\n");
     printf("  --target-abi=<abi>        Set the target ABI, e.g. gnu, eabi, gnueabihf, msvc, etc.\n");
     printf("                              Default is gnu if target isn't riscv64 or riscv32\n");
     printf("                              For target riscv64 and riscv32, default is lp64d and ilp32d\n");