README.md

Demo for http://stackoverflow.com/q/16092520/827263

As you can see, g++ 4.7.2 reports the missing semicolon error in c.c, not in foo.h

bar.h

// ;

build.sh

#!/bin/sh

echo "% g++ --version"
g++ --version

echo "% head foo.h bar.h c.cpp"
head foo.h bar.h c.cpp

echo "% g++ -c c.cpp"
g++ -c c.cpp

build.sh.log

% g++ --version
g++ (Ubuntu/Linaro 4.7.2-2ubuntu1) 4.7.2
Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

% head foo.h bar.h c.cpp
==> foo.h <==
extern void func()

==> bar.h <==
// ;

==> c.cpp <==
#include "foo.h"
#include "bar.h"
int main() {
    func();
}
% g++ -c c.cpp
c.cpp:3:1: error: expected initializer before ‘int’

c.cpp

#include "foo.h"
#include "bar.h"
int main() {
    func();
}

foo.h

extern void func()