diff options
| -rwxr-xr-x | scripts/recordmcount.pl | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/scripts/recordmcount.pl b/scripts/recordmcount.pl index 1891cf9743fc..ee9e12676776 100755 --- a/scripts/recordmcount.pl +++ b/scripts/recordmcount.pl @@ -187,6 +187,36 @@ my $mcount_s = $dirname . "/.tmp_mc_" . $prefix . ".s"; my $mcount_o = $dirname . "/.tmp_mc_" . $prefix . ".o"; # +# --globalize-symbols came out in 2.17, we must test the version +# of objcopy, and if it is less than 2.17, then we can not +# record local functions. +my $use_locals = 01; +my $local_warn_once = 0; +my $found_version = 0; + +open (IN, "$objcopy --version |") || die "error running $objcopy"; +while (<IN>) { + if (/objcopy.*\s(\d+)\.(\d+)/) { + my $major = $1; + my $minor = $2; + + $found_version = 1; + if ($major < 2 || + ($major == 2 && $minor < 17)) { + $use_locals = 0; + } + last; + } +} +close (IN); + +if (!$found_version) { + print STDERR "WARNING: could not find objcopy version.\n" . + "\tDisabling local function references.\n"; +} + + +# # Step 1: find all the local (static functions) and weak symbols. # 't' is local, 'w/W' is weak (we never use a weak function) # @@ -229,6 +259,17 @@ sub update_funcs # is this function static? If so, note this fact. if (defined $locals{$ref_func}) { + + # only use locals if objcopy supports globalize-symbols + if (!$use_locals) { + print STDERR + "$inputfile: WARNING: referencing local function " . + "$ref_func for mcount\n" . + "\tConsider upgrading objcopy to support the globalize-" . + "symbols option.\n" + if (!$local_warn_once++); + return; + } $convert{$ref_func} = 1; } |