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| author | Martin Liska <mliska@suse.cz> | 2018-06-05 14:10:22 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2018-06-05 12:10:22 +0000 |
| commit | 97a53d1d04d5dc36f64c0897ff0c49c78ef83ffc (patch) | |
| tree | d088d0aa4d340c24d5eedc905d9cd05b01c035ba /gcc/doc | |
| parent | 066c4268db267ef6d88498b001b143db404e495e (diff) | |
| download | gcc-97a53d1d04d5dc36f64c0897ff0c49c78ef83ffc.zip gcc-97a53d1d04d5dc36f64c0897ff0c49c78ef83ffc.tar.gz gcc-97a53d1d04d5dc36f64c0897ff0c49c78ef83ffc.tar.bz2 | |
Support variables in expansion of -fprofile-generate option (PR gcov-profile/47618).
2018-06-05 Martin Liska <mliska@suse.cz>
PR gcov-profile/47618
* doc/invoke.texi: Document how -fprofile-dir format
is extended.
2018-06-05 Martin Liska <mliska@suse.cz>
PR gcov-profile/47618
* libgcov-driver-system.c (replace_filename_variables): New
function.
(gcov_exit_open_gcda_file): Use it.
From-SVN: r261199
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 169dd44..3d767b6 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -11343,6 +11343,20 @@ and its related options. Both absolute and relative paths can be used. By default, GCC uses the current directory as @var{path}, thus the profile data file appears in the same directory as the object file. +When an executable is run in a massive parallel environment, it is recommended +to save profile to different folders. That can be done with variables +in @var{path} that are exported during run-time: + +@table @gcctabopt + +@item %p +process ID. + +@item %q@{VAR@} +value of environment variable @var{VAR} + +@end table + @item -fprofile-generate @itemx -fprofile-generate=@var{path} @opindex fprofile-generate |