Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 253cab89 authored by Dan Willemsen's avatar Dan Willemsen
Browse files

Fix absolute paths in clang debug output 

As of the latest clang python wrapper, clang is being executed with an
absolute path. That means that clang-provided headers are written with
absolute paths in the debug info, making the builds non-reproducible
(especially with ccache).

So keep our current PWD=/proc/self/pwd -fdebug-prefix-map=/proc/self/cwd=,
but add a new -fdebug-prefix-map=$PWD/= to rewrite these absolute paths.

Bug: 36463318
Test: m -j libc adb; grep for path names
Test: spot check objdump -W before/after, see only expected diffs.
Change-Id: Ic2cdfca051d3c38b753fd5c1fcbeaca8bafc29ae
parent e7ee3c7b

cc/config/clang.go

+4 −0
Original line number Diff line number Diff line
@@ -91,6 +91,10 @@ func init() { 


		// http://b/29823425 Disable -Wexpansion-to-defined for Clang update to r271374

		"-Wno-expansion-to-defined",



		// http://b/36463318 Clang executes with an absolute path, so clang-provided

		// headers are now absolute.

		"-fdebug-prefix-map=$$PWD/=",

	}, " "))



	pctx.StaticVariable("ClangExtraCppflags", strings.Join([]string{