On Tue, Feb 02, 2016 at 01:32:17PM +0100, Sandro Mani wrote:
> Hi
>
> qt-creator builds have started to fail, I've reduced the failure down to
> having "-isystem /usr/include" in the command line:
Don't use -isystem /usr/include for C++, unless you also include first all
the C++ include directories as -isystem too. Why do you need that?
-isystem /usr/include is the default, but in proper place, not prepended
before system headers.
> $ cat test.cpp
> #include <algorithm>
>
> $ g++ -isystem /usr/include -c -o test.o test.cpp
> In file included from /usr/include/c++/6.0.0/bits/stl_algo.h:59:0,
> from /usr/include/c++/6.0.0/algorithm:62,
> from test.cpp:1:
> /usr/include/c++/6.0.0/cstdlib:75:25: fatal error: stdlib.h: No such file or
> directory
> #include_next <stdlib.h>
>
>
> Without the -isystem /usr/include, it compiles.
>
> Bug in GCC?
No.
Jakub
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