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Rework how scan-build picks the version of clang to use for static analysis. 

Unless the user specifies, the clang used for static analysis is the one
found relative to scan-build.

If the user specifies -with-analyzer, they can pick either to use
the clang bundled with Xcode (via xcrun) or they can specify
a path to clang.

llvm-svn: 162620
This commit is contained in:
Ted Kremenek 2012-08-24 23:08:08 +00:00
parent 2f65f465bf
commit 22708504f2
1 changed files with 61 additions and 40 deletions
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99
clang/tools/scan-build/scan-build
View File

@ -93,44 +93,13 @@ if (grep /^--help-checkers$/, @ARGV) {
}
##----------------------------------------------------------------------------##
# Some initial preprocessing of Clang options.
# Declaration of Clang options. Populated later.
##----------------------------------------------------------------------------##
# Find 'clang'
my $ClangSB = Cwd::realpath("$RealBin/bin/clang");
if (!defined $ClangSB || ! -x $ClangSB) {
$ClangSB = Cwd::realpath("$RealBin/clang");
}
my $Clang;
my $howFound = "from path";
if (!defined $ClangSB || ! -x $ClangSB) {
# Default to looking for 'clang' in the path, or xcrun
# on OS X.
my $xcrun = `which xcrun`;
chomp $xcrun;
if ($xcrun ne "") {
$Clang = `$xcrun -toolchain XcodeDefault -find clang`;
chomp $Clang;
if ($Clang eq "") {
DieDiag("No 'clang' executable found by 'xcrun'\n");
}
$howFound = "found using 'xcrun'";
}
else {
$Clang = `which clang`;
chomp $Clang;
if ($Clang eq "") {
DieDiag("No 'clang' executable found in path\n");
}
}
}
else {
$Clang = $ClangSB;
}
my $ClangCXX = $Clang;
$ClangCXX =~ s/\-\d+\.\d+$//;
$ClangCXX .= "++";
my $ClangVersion = HtmlEscape(`$Clang --version`);
my $ClangSB;
my $ClangCXX;
my $ClangVersion;
##----------------------------------------------------------------------------##
# GetHTMLRunDir - Construct an HTML directory name for the current sub-run.
@ -1111,6 +1080,13 @@ ADVANCED OPTIONS:
Generate internal analyzer statistics.
-with-analyzer [Xcode|path to clang]
-with-analyzer=[Xcode|path to clang]
scan-build uses the 'clang' executable relative to itself for static
analysis. One can override this behavior with this option by using the
'clang' packaged with Xcode (on OS X) or from the PATH.
CONTROLLING CHECKERS:
A default group of checkers are always run unless explicitly disabled.
@ -1291,6 +1267,7 @@ if (!@ARGV) {
my $displayHelp = 0;
my $AnalyzerDiscoveryMethod;
while (@ARGV) {
@ -1458,6 +1435,16 @@ while (@ARGV) {
push @PluginsToLoad, "-load", shift @ARGV;
next;
}
if ($arg eq "-with-analyzer") {
shift @ARGV;
$AnalyzerDiscoveryMethod = shift @ARGV;
next;
}
if ($arg =~ /^-with-analyzer=(.+)$/) {
shift @ARGV;
$AnalyzerDiscoveryMethod = $1;
next;
}
DieDiag("unrecognized option '$arg'\n") if ($arg =~ /^-/);
@ -1474,6 +1461,43 @@ if ($displayHelp) {
exit 1;
}
# Find 'clang'
if (!defined $AnalyzerDiscoveryMethod) {
$Clang = Cwd::realpath("$RealBin/bin/clang");
if (!defined $Clang || ! -x $Clang) {
$Clang = Cwd::realpath("$RealBin/clang");
}
if (!defined $Clang || ! -x $Clang) {
DieDiag("error: Cannot find an executable 'clang' relative to scan-build." .
" Consider using --with-analyzer to pick a version of 'clang' to use for static analysis.\n");
}
}
else {
if ($AnalyzerDiscoveryMethod =~ /^[X,x]code$/) {
my $xcrun = `which xcrun`;
chomp $xcrun;
if ($xcrun eq "") {
DieDiag("Cannot find 'xcrun' to find 'clang' for analysis.\n");
}
$Clang = `$xcrun -toolchain XcodeDefault -find clang`;
chomp $Clang;
if ($Clang eq "") {
DieDiag("No 'clang' executable found by 'xcrun'\n");
}
}
else {
$Clang = Cwd::realpath($AnalyzerDiscoveryMethod);
if (! -x $Clang) {
DieDiag("Cannot find an executable clang at '$Clang'\n");
}
}
}
$ClangCXX = $Clang;
$ClangCXX =~ s/\-\d+\.\d+$//;
$ClangCXX .= "++";
$ClangVersion = HtmlEscape(`$Clang --version`);
# Determine where results go.
$CmdArgs = HtmlEscape(join(' ', map(ShellEscape($_), @ARGV)));
$HtmlTitle = "${CurrentDirSuffix} - scan-build results"
@ -1497,10 +1521,7 @@ if (!defined $CmdCXX || ! -x $CmdCXX) {
DieDiag("Executable 'c++-analyzer' does not exist at '$CmdCXX'\n") if(! -x $CmdCXX);
}
if (!defined $ClangSB || ! -x $ClangSB) {
Diag("'clang' executable not found in '$RealBin/bin'.\n");
Diag("Using 'clang' $howFound: $Clang\n");
}
Diag("Using '$Clang' for static analysis\n");
SetHtmlEnv(\@ARGV, $HtmlDir);
if ($AnalyzeHeaders) { push @AnalysesToRun,"-analyzer-opt-analyze-headers"; }