QDoc: Fix handling of -isystem option

When qdoc is built with QDOC_PASS_ISYSTEM define, it is possible to pass
-isystem options to qdoc, and it will forward them to clang.

Commit ce895f066579f71d fixed handling of the -F option, this commit
fixes the -isystem option in a similar way.

Change-Id: I876546650354ca3ee7f6edd216fd38b3d1a17285
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/qdoc/clangcodeparser.cpp b/src/qdoc/clangcodeparser.cpp
index f39d69354..ee51e7bd4 100644
--- a/src/qdoc/clangcodeparser.cpp
+++ b/src/qdoc/clangcodeparser.cpp
@@ -1059,6 +1059,9 @@ void ClangCodeParser::initializeParser(const Config &config)
         if (p.startsWith(QLatin1String("-I")) || p.startsWith(QLatin1String("-F"))) {
             rawpath = p.mid(2).trimmed();
             option = p.left(2).toUtf8();
+        } else if (p.startsWith(QLatin1String("-isystem"))) {
+            rawpath = p.mid(8).trimmed();
+            option = "-isystem";
         } else {
             rawpath = p;
             option = "-I";