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authorBjörn Gustavsson <[email protected]>2016-12-07 15:40:45 +0100
committerBjörn Gustavsson <[email protected]>2016-12-07 16:21:14 +0100
commit8b0aff6608c42bf3c04381697b9ab57ffbd93456 (patch)
tree373b3543b4b17ccf053a136f8677eeab39ad25c4 /lib/compiler/src/beam_asm.erl
parentab2c71054a4c71c60ac433168048b8742408cd09 (diff)
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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
Diffstat (limited to 'lib/compiler/src/beam_asm.erl')
-rw-r--r--lib/compiler/src/beam_asm.erl7
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) ->