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-rwxr-xr-xscripts/recordmcount.pl41
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;
}