1 files changed, 20 insertions, 0 deletions
diff --git a/clang/tools/scan-build/ccc-analyzer b/clang/tools/scan-build/ccc-analyzer
index 4c8f6482a15..c99328221ab 100755
--- a/clang/tools/scan-build/ccc-analyzer
+++ b/clang/tools/scan-build/ccc-analyzer
@@ -41,10 +41,14 @@ my $Clang;
 my $DefaultCCompiler;
 my $DefaultCXXCompiler;
 my $IsCXX;
+my $UseXCRUN = 0;
 
 if (`uname -a` =~ m/Darwin/) {
   $DefaultCCompiler = 'clang';
   $DefaultCXXCompiler = 'clang++';
+  if (-x "/usr/bin/xcrun") {
+    $UseXCRUN = 1;
+  }
 } else {
   $DefaultCCompiler = 'gcc';
   $DefaultCXXCompiler = 'g++';
@@ -478,6 +482,7 @@ my $HtmlDir = $ENV{'CCC_ANALYZER_HTML'};
 my %DisabledArchs = ('ppc' => 1, 'ppc64' => 1);
 my %ArchsSeen;
 my $HadArch = 0;
+my $HasSDK = 0;
 
 # Process the arguments.
 foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
@@ -500,6 +505,12 @@ foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
     next;
   }
 
+  # On OSX/iOS, record if an SDK path was specified.  This
+  # is innocuous for other platforms, so the check just happens.
+  if ($Arg =~ /^-isysroot/) {
+    $HasSDK = 1;
+  }
+
   # Options with possible arguments that should pass through to compiler.
   if (defined $CompileOptionMap{$ArgKey}) {
     my $Cnt = $CompileOptionMap{$ArgKey};
@@ -644,6 +655,15 @@ foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
   }
 }
 
+# If we are on OSX and have an installation where the
+# default SDK is inferred by xcrun use xcrun to infer
+# the SDK.
+if (not $HasSDK and $UseXCRUN) {
+  my $sdk = `/usr/bin/xcrun --show-sdk-path -sdk macosx`;
+  chomp $sdk;
+  push @CompileOpts, "-isysroot", $sdk;
+}
+
 if ($Action eq 'compile' or $Action eq 'link') {
   my @Archs = keys %ArchsSeen;
   # Skip the file if we don't support the architectures specified.