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cmd/compile: record original and absolute file names for line directives

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Also, with this change, error locations don't print absolute positions
in [] brackets following positions relative to line directives. To get
the absolute positions as well, specify the -L flag.

Fixes #22660.

Change-Id: I9ecfa254f053defba9c802222874155fa12fee2c
Reviewed-on: https://go-review.googlesource.com/77090
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
griesemer 2017-11-10 11:38:51 -08:00 • committed by Robert Griesemer
parent 2c00dea18b
commit ca2a886cba
12 changed files with 83 additions and 27 deletions
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1
src/cmd/compile/internal/gc/main.go
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@ -192,6 +192,7 @@ func Main(archInit func(*Arch)) {
objabi.Flagcount("E", "debug symbol export", &Debug['E'])
objabi.Flagfn1("I", "add `directory` to import search path", addidir)
objabi.Flagcount("K", "debug missing line numbers", &Debug['K'])
objabi.Flagcount("L", "show full file names in error messages", &Debug['L'])
objabi.Flagcount("N", "disable optimizations", &Debug['N'])
flag.BoolVar(&Debug_asm, "S", false, "print assembly listing")
objabi.AddVersionFlag() // -V