On 6 January 2017 at 17:35, Wu Zhen <wuz...@jidemail.com> wrote:
> From: WuZhen <wuz...@jidemail.com>
>
> since (cf410574 gallivm: Make MCJIT a runtime optioni.), llvmpipe assume
> MCJIT is available on x86(_64). this is not the case for android prior to M.
>
Wu Zhen, what exactly is the issue you're getting - build or link-time error ?

Looking at the hunk [1] in the offending commit makes me wonder.
 - Why do we call LLVMLinkInJIT() even if one selects MCJIT via the env var.
 - Why do we always call LLVMLinkInMCJIT regardless of a) if we've
build against old LLVM and b) the env var.

Jose, shouldn't we honour the above ? One way that comes to mind is to
have USE_MCJIT always as static variable. Then we can guard the
debug_get_bool_option() override with the current LLVM_VERSION/ARCH
heuristics while preserving original invocation.

if (USE_MCJIT) // use lowercase name since it's not a macro ?
   LLVMLinkInMCJIT();
else
   LLVMLinkInJIT();


Thanks
Emil

[1]
@@ -385,18 +382,18 @@ lp_build_init(void)
   if (gallivm_initialized)
      return TRUE;

+   LLVMLinkInMCJIT();
+#if !defined(USE_MCJIT)
+   USE_MCJIT = debug_get_bool_option("GALLIVM_MCJIT", 0);
+   LLVMLinkInJIT();
+#endif
+
#ifdef DEBUG
   gallivm_debug = debug_get_option_gallivm_debug();
#endif

   lp_set_target_options();

-#if USE_MCJIT
-   LLVMLinkInMCJIT();
-#else
-   LLVMLinkInJIT();
-#endif
-
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