make $$shell_{path,quote}() use correct path separator

follow suit with qmake ...

Change-Id: I0221f6c81bc770c37f501d79c31860549c0c0076
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/shared/proparser/qmakebuiltins.cpp

@@ -1009,7 +1009,7 @@ ProStringList QMakeEvaluator::evaluateExpandFunction(
             evalError(fL1S("shell_path(path) requires one argument."));
         } else {
             QString rstr = args.at(0).toQString(m_tmp1);
-            if (m_option->dir_sep.at(0) != QLatin1Char('/'))
+            if (m_dirSep.startsWith(QLatin1Char('\\')))
                 rstr.replace(QLatin1Char('/'), QLatin1Char('\\'));
             else
                 rstr.replace(QLatin1Char('\\'), QLatin1Char('/'));
@@ -1029,7 +1029,7 @@ ProStringList QMakeEvaluator::evaluateExpandFunction(
             evalError(fL1S("shell_quote(arg) requires one argument."));
         } else {
             QString rstr = args.at(0).toQString(m_tmp1);
-            if (m_option->dir_sep.at(0) != QLatin1Char('/'))
+            if (m_dirSep.startsWith(QLatin1Char('\\')))
                 rstr = IoUtils::shellQuoteWin(rstr);
             else
                 rstr = IoUtils::shellQuoteUnix(rstr);

src/shared/proparser/qmakeevaluator.cpp

@@ -201,6 +201,7 @@ void QMakeEvaluator::initFrom(const QMakeEvaluator &other)
     m_qmakespecName = other.m_qmakespecName;
     m_mkspecPaths = other.m_mkspecPaths;
     m_featureRoots = other.m_featureRoots;
+    m_dirSep = other.m_dirSep;
 }
 
 //////// Evaluator tools /////////
@@ -1105,6 +1106,8 @@ bool QMakeEvaluator::loadSpec()
     if (!evaluateFeatureFile(QLatin1String("spec_post.prf")))
         return false;
     updateFeaturePaths(); // The spec extends the feature search path, so rebuild the cache.
+    // The MinGW and x-build specs may change the separator; $$shell_{path,quote}() need it
+    m_dirSep = first(ProKey("QMAKE_DIR_SEP"));
     if (!m_conffile.isEmpty()
         && !evaluateFileDirect(m_conffile, QMakeHandler::EvalConfigFile, LoadProOnly)) {
         return false;

src/shared/proparser/qmakeevaluator.h

@@ -233,6 +233,7 @@ public:
     QStringList m_qmakefeatures;
     QStringList m_mkspecPaths;
     QStringList m_featureRoots;
+    ProString m_dirSep;
     ProFunctionDefs m_functionDefs;
     ProStringList m_returnValue;
     QStack<ProValueMap> m_valuemapStack; // VariableName must be us-ascii, the content however can be non-us-ascii.