qmake: Fix missing newlines in generated vcxproj files

A bug in the Windows C Runtime causes text mode pipes to drop newlines
sometimes. This bug was hidden because of another bug in rcc which
caused newlines to be redundantly duplicated. When the latter bug was
fixed (commit 53d5811b) the former bug was exposed, causing invalid
vcxproj files to be generated. The Windows bug is described here:
https://connect.microsoft.com/VisualStudio/feedback/details/1902345
The workaround is to avoid text mode, and do the conversion of "\r\n"
to "\n" ourselves (which we were already doing anyway).

Change-Id: I792599a4cd7822f109fa921f02207fb1b144b1d1
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

2 files changed, 9 insertions, 2 deletions

diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index 02cd8a2760..e200c7c551 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -72,9 +72,11 @@
 
 #ifdef Q_OS_WIN32
 #define QT_POPEN _popen
+#define QT_POPEN_READ "rb"
 #define QT_PCLOSE _pclose
 #else
 #define QT_POPEN popen
+#define QT_POPEN_READ "r"
 #define QT_PCLOSE pclose
 #endif
 
@@ -413,7 +415,7 @@ QByteArray QMakeEvaluator::getCommandOutput(const QString &args) const
 #else
     if (FILE *proc = QT_POPEN(QString(QLatin1String("cd ")
                                + IoUtils::shellQuote(QDir::toNativeSeparators(currentDirectory()))
-                               + QLatin1String(" && ") + args).toLocal8Bit().constData(), "r")) {
+                               + QLatin1String(" && ") + args).toLocal8Bit().constData(), QT_POPEN_READ)) {
         while (!feof(proc)) {
             char buff[10 * 1024];
             int read_in = int(fread(buff, 1, sizeof(buff), proc));
@@ -423,6 +425,9 @@ QByteArray QMakeEvaluator::getCommandOutput(const QString &args) const
         }
         QT_PCLOSE(proc);
     }
+# ifdef Q_OS_WIN
+    out.replace("\r\n", "\n");
+# endif
 #endif
     return out;
 }
diff --git a/qmake/library/qmakeglobals.cpp b/qmake/library/qmakeglobals.cpp
index 8bb5199519..9d5d5fbac5 100644
--- a/qmake/library/qmakeglobals.cpp
+++ b/qmake/library/qmakeglobals.cpp
@@ -64,9 +64,11 @@
 
 #ifdef Q_OS_WIN32
 #define QT_POPEN _popen
+#define QT_POPEN_READ "rb"
 #define QT_PCLOSE _pclose
 #else
 #define QT_POPEN popen
+#define QT_POPEN_READ "r"
 #define QT_PCLOSE pclose
 #endif
 
@@ -307,7 +309,7 @@ bool QMakeGlobals::initProperties()
     data = proc.readAll();
 #else
     if (FILE *proc = QT_POPEN(QString(QMakeInternal::IoUtils::shellQuote(qmake_abslocation)
-                                      + QLatin1String(" -query")).toLocal8Bit(), "r")) {
+                                      + QLatin1String(" -query")).toLocal8Bit(), QT_POPEN_READ)) {
         char buff[1024];
         while (!feof(proc))
             data.append(buff, int(fread(buff, 1, 1023, proc)));