https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93401
Bug ID: 93401
Summary: [9/10 regression] It is no longer possible to use
-fprofile-generate=<dir> on setups with different
instrumentation and feedback directories
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: hubicka at gcc dot gnu.org
Target Milestone: ---
https://gcc.gnu.org/git/gitweb.cgi?p=gcc.git;h=42870a86829f9d6dd326d318a3a028fbceb88d94
updated coverage.c co mangle full rather than relative names into gcov dump
file names. This solves problem with multiple files conflicting on single
dump (PR91971) but makes it impossible to read the profile when final build
directory differs from training. This is used i.e. by Firefox and HHVM.
Mark Williams suggested -ffile-prefix-map=old=new to strip away the outer dir
of build.
