shiboken6: Determine the target platform

Store the target triple from the clang options of the command line to
be able to set up compiler options for clang parsing accordingly.
While parsing, update by the value obtained from clang and the pointer
size.

Pick-to: 6.9
Task-number: PYSIDE-3105
Change-Id: I33c60e14418b10c3f3cfa1603b29ed2a06b1589a
Reviewed-by: Cristian Maureira-Fredes <[email protected]>

4 files changed, 52 insertions, 0 deletions

diff --git a/sources/shiboken6/ApiExtractor/apiextractor.cpp b/sources/shiboken6/ApiExtractor/apiextractor.cpp
index 90f4f5dd9..38dedfd14 100644
--- a/sources/shiboken6/ApiExtractor/apiextractor.cpp
+++ b/sources/shiboken6/ApiExtractor/apiextractor.cpp
@@ -370,6 +370,7 @@ bool ApiExtractorPrivate::runHelper(ApiExtractorFlags flags)
 
     bool addCompilerSupportArguments = true;
     if (clangOptionsSize > 0) {
+        clang::setTargetTriple(m_clangOptions);
         qsizetype i = 0;
         if (m_clangOptions.at(i) == u"-") {
             ++i;
diff --git a/sources/shiboken6/ApiExtractor/clangparser/clangparser.cpp b/sources/shiboken6/ApiExtractor/clangparser/clangparser.cpp
index 54a1a2c8b..69582af0d 100644
--- a/sources/shiboken6/ApiExtractor/clangparser/clangparser.cpp
+++ b/sources/shiboken6/ApiExtractor/clangparser/clangparser.cpp
@@ -275,6 +275,15 @@ static CXTranslationUnit createTranslationUnit(CXIndex index,
     return tu;
 }
 
+static void setupTarget(CXTranslationUnit translationUnit)
+{
+    const CXTargetInfo targetInfo = clang_getTranslationUnitTargetInfo(translationUnit);
+    const auto tripleCS = clang_TargetInfo_getTriple(targetInfo);
+    clang::setPointerSize(clang_TargetInfo_getPointerWidth(targetInfo));
+    clang::setTargetTriple(QString::fromUtf8(clang_getCString(tripleCS)));
+    clang_disposeString(tripleCS);
+}
+
 /* clangFlags are flags to clang_parseTranslationUnit2() such as
  * CXTranslationUnit_KeepGoing (from CINDEX_VERSION_MAJOR/CINDEX_VERSION_MINOR 0.35)
  */
@@ -295,6 +304,8 @@ bool parse(const QByteArrayList  &clangArgs, bool addCompilerSupportArguments,
     if (!translationUnit)
         return false;
 
+    setupTarget(translationUnit);
+
     CXCursor rootCursor = clang_getTranslationUnitCursor(translationUnit);
 
     clang_visitChildren(rootCursor, visitorCallback, reinterpret_cast<CXClientData>(&bv));
diff --git a/sources/shiboken6/ApiExtractor/clangparser/compilersupport.cpp b/sources/shiboken6/ApiExtractor/clangparser/compilersupport.cpp
index ed8057b62..d4edf55c0 100644
--- a/sources/shiboken6/ApiExtractor/clangparser/compilersupport.cpp
+++ b/sources/shiboken6/ApiExtractor/clangparser/compilersupport.cpp
@@ -59,6 +59,9 @@ bool setCompiler(const QString &name)
 
 QString _compilerPath; // Pre-defined compiler path (from command line)
 
+static unsigned _pointerSize = QT_POINTER_SIZE * 8;
+static QString _targetTriple;
+
 const QString &compilerPath()
 {
     return _compilerPath;
@@ -451,4 +454,33 @@ LanguageLevel languageLevelFromOption(const char *o)
     return LanguageLevel::Default;
 }
 
+unsigned pointerSize()
+{
+    return _pointerSize;
+}
+
+void setPointerSize(unsigned ps)
+{
+    _pointerSize = ps;
+}
+
+QString targetTriple()
+{
+    return _targetTriple;
+
+}
+void setTargetTriple(const QString &t)
+{
+    _targetTriple = t;
+}
+
+void setTargetTriple(const QStringList &clangOptions)
+{
+    static constexpr auto targetOption = "--target="_L1;
+    auto targetOptionPred = [](const QString &o) { return o.startsWith(targetOption); };
+    const auto it = std::find_if(clangOptions.cbegin(), clangOptions.cend(), targetOptionPred);
+    if (it != clangOptions.cend())
+        _targetTriple = it->sliced(targetOption.size());
+}
+
 } // namespace clang
diff --git a/sources/shiboken6/ApiExtractor/clangparser/compilersupport.h b/sources/shiboken6/ApiExtractor/clangparser/compilersupport.h
index 1fa980998..0e12ca137 100644
--- a/sources/shiboken6/ApiExtractor/clangparser/compilersupport.h
+++ b/sources/shiboken6/ApiExtractor/clangparser/compilersupport.h
@@ -51,6 +51,14 @@ void setCompilerPath(const QString &name);
 
 Platform platform();
 bool setPlatform(const QString &name);
+
+unsigned pointerSize(); // (bit)
+void setPointerSize(unsigned ps); // Set by parser
+
+QString targetTriple();
+void setTargetTriple(const QStringList &clangOptions); // Set from cmd line before parsing
+void setTargetTriple(const QString &t); // Updated by clang parser while parsing
+
 } // namespace clang
 
 #endif // COMPILERSUPPORT_H