Add option 'deterministic' for reproducible builds

Add the option 'deterministic' to make it easier to
achieve reproducible builds.

This option omits the {options,...} and {source,...} tuples in
M:module_info(compile), because those options may contain absolute
paths.

The author of ERL-310 suggested that only compiler options that
may contain absolute paths (such as {i,...}) should be excluded. But I
find it confusing to keep only some options.

Alternatives considered: Always omitting this information. Since this
information has been available for a long time, that would probably
break some workflows. As an example that some people care about
{source,...}, 2d785c07fbf9 made it possible to give a compiler option
to set {source,...}.

ERL-310

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/compiler/src/beam_asm.erl b/lib/compiler/src/beam_asm.erl
index f6ca7a0afb..9c8ed2277f 100644
--- a/lib/compiler/src/beam_asm.erl
+++ b/lib/compiler/src/beam_asm.erl
@@ -233,7 +233,12 @@ build_attributes(Opts, SourceFile, Attr, MD5) ->
 	       false -> Misc0;
 	       true -> []
 	   end,
-    Compile = [{options,Opts},{version,?COMPILER_VSN}|Misc],
+    Compile = case member(deterministic, Opts) of
+		  false ->
+		      [{options,Opts},{version,?COMPILER_VSN}|Misc];
+		  true ->
+		      [{version,?COMPILER_VSN}]
+	      end,
     {term_to_binary(set_vsn_attribute(Attr, MD5)),term_to_binary(Compile)}.
 
 build_line_table(Dict) ->