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[analyzer] Improve behavior if Clang not found.

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- Eliminate 'No such file or directory at scan-build line ...' error if '$RealBin/bin/clang' or '$RealBin/clang' directory does not exist.
- Eliminate 'Use of uninitialized value $Clang in concatenation (.) or string at scan-build line ...' error if help is displayed while $Clang was not found.

llvm-svn: 247466
This commit is contained in:
Anton Yartsev 2015-09-11 20:41:09 +00:00
parent 072e83500e
commit f54d6796e3
1 changed files with 31 additions and 29 deletions
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8
clang/tools/scan-build/scan-build
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@ -1258,6 +1258,7 @@ LOADING CHECKERS:
-load-plugin [plugin library]
ENDTEXT
if (defined $Clang && -x $Clang) {
# Query clang for list of checkers that are enabled.
# create a list to load the plugins via the 'Xclang' command line
@ -1290,7 +1291,7 @@ ENDTEXT
push ( @PluginLoadCommandline, "-load" );
push ( @PluginLoadCommandline, $param );
}
if (defined $Clang && -x $Clang) {
my $ExecLine = join(' ', qq/"$Clang"/, "-cc1", @PluginLoadCommandline, "-analyzer-checker-help", "2>&1", "|");
open(PS, $ExecLine);
my $foundCheckers = 0;
@ -1634,6 +1635,7 @@ if (!@ARGV) {
}
ProcessArgs(\@ARGV);
# All arguments are now shifted from @ARGV. The rest is a build command, if any.
if (!@ARGV and !$RequestDisplayHelp) {
ErrorDiag("No build command specified.\n\n");
@ -1642,9 +1644,9 @@ if (!@ARGV and !$RequestDisplayHelp) {
# Find 'clang'
if (!defined $Options{AnalyzerDiscoveryMethod}) {
$Clang = Cwd::realpath("$RealBin/bin/clang");
$Clang = Cwd::realpath("$RealBin/bin/clang") if (-d "$RealBin/bin/clang");
if (!defined $Clang || ! -x $Clang) {
$Clang = Cwd::realpath("$RealBin/clang");
$Clang = Cwd::realpath("$RealBin/clang") if (-d "$RealBin/clang");
}
if (!defined $Clang || ! -x $Clang) {
if (!$RequestDisplayHelp && !$ForceDisplayHelp) {