From 5b4e652b26f58abdae2e3021bcf69f5c21226100 Mon Sep 17 00:00:00 2001
From: Christian Kandeler <christian.kandeler@qt.io>
Date: Mon, 4 Jan 2021 16:54:33 +0100
Subject: [PATCH] ProParser: Do not open a write channel for processes invoked
 for system()

If a process invoked via one of qmake's system() functions attempts to
read from stdin, it will currently hang Qt Creator. Prevent that.

Task-number: QTCREATORBUG-25194
Change-Id: I9c6411bcb2fb8e0d2705252cc6d27900472906a1
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
---
 src/shared/proparser/qmakebuiltins.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/shared/proparser/qmakebuiltins.cpp b/src/shared/proparser/qmakebuiltins.cpp
index 724bd9624b1..fe12f2d32e5 100644
--- a/src/shared/proparser/qmakebuiltins.cpp
+++ b/src/shared/proparser/qmakebuiltins.cpp
@@ -458,6 +458,7 @@ QMakeEvaluator::writeFile(const QString &ctx, const QString &fn, QIODevice::Open
 void QMakeEvaluator::runProcess(QProcess *proc, const QString &command) const
 {
     proc->setWorkingDirectory(currentDirectory());
+    proc->setStandardInputFile(QProcess::nullDevice());
 # ifdef PROEVALUATOR_SETENV
     if (!m_option->environment.isEmpty()) {
         QProcessEnvironment env = m_option->environment;