From 8b0aff6608c42bf3c04381697b9ab57ffbd93456 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Wed, 7 Dec 2016 15:40:45 +0100 Subject: 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 --- lib/compiler/src/beam_asm.erl | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'lib/compiler/src/beam_asm.erl') 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) -> -- cgit v1.2.3