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Warn the user when compiling Objective-C files (.m) that includes Qt

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Xcode project templates will by default create source files that
ends with .m (obj-c). If you try to include Qt from such files, you
will get a bunch of compile errors, since the compiler will not
understand C++ concepts, such as namespaces.

To ease mixing native iOS and OS X apps with Qt, we print a warning
to the console, so that the error messages are easier to understand
and fix, by renaming the offending file to .mm.

Change-Id: I192f460f9ca53145b7193dec1cfe7c095ae149a1
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Tor Arne Vestbø 2014-01-28 16:31:49 +01:00 committed by The Qt Project
parent 18b7015e86
commit f2b6307af2
2 changed files with 8 additions and 0 deletions
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4
src/corelib/global/qnamespace.h
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@ -44,6 +44,10 @@
#include <QtCore/qglobal.h>
#if defined(__OBJC__) && !defined(__cplusplus)
# warning "File built in Objective-C mode (.m), but using Qt requires Objective-C++ (.mm)"
#endif
QT_BEGIN_NAMESPACE

4
src/corelib/kernel/qobjectdefs.h
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@ -42,6 +42,10 @@
#ifndef QOBJECTDEFS_H
#define QOBJECTDEFS_H
#if defined(__OBJC__) && !defined(__cplusplus)
# warning "File built in Objective-C mode (.m), but using Qt requires Objective-C++ (.mm)"
#endif
#include <QtCore/qnamespace.h>
#include <QtCore/qobjectdefs_impl.h>