Op 30-10-12 03:47, Alexander Hansen schreef: > I've got a Qt-related question. Gnuplot-4.6.0 added Qt support (not > turned on by default) and I wanted to enable this as an option. > However, this doesn't work (on 10.8/Xcode CLI 4.5, anyway):
The problem is the C++ compiler is running in ObjC mode, yet includes headers
written for C++:
> c++ [...] -ObjC
> /sw/lib/qt4-x11/include/QtCore/qnamespace.h:1808:1: error: unknown type name
> 'class'; did you mean 'Class'?
This leads to more or less the same behaviour in g++ and clang++. The problem
can be fixed by changing -ObjC to -ObjC++; alternatively, by not giving the
flag at all if the source file does not use ObjC functionality.
Tested with the following test case:
sjors@smbp:/tmp$ cat test.cpp
#include <stdio.h>
class Foo {
public:
static void print() {
printf("foo\n");
}
};
int main(int argc, char *argv[]) {
Foo::print();
return 0;
}
sjors@smbp:/tmp$ c++ test.cpp -o test
sjors@smbp:/tmp$ ./test
foo
sjors@smbp:/tmp$ c++ -ObjC test.cpp -o test
test.cpp:3:1: error: unknown type name 'class'; did you mean 'Class'?
[...]
sjors@smbp:/tmp$ c++ -ObjC++ test.cpp -o test
sjors@smbp:/tmp$ ./test
foo
Sjors
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