[cairo] [PATCH v2 3/3] configure.ac: Fix broken build for Qt backend

[Uli Schlachter]

On 10.07.2014 09:19, Bryce W. Harrington wrote:
> When --enable-qt is specified, the build will break due to missing
> libstdc++:
>
>    CCLD     cairo-test-suite
> /usr/bin/ld: ../boilerplate/.libs/libcairoboilerplate.a(libcairoboilerplate_cxx_la-cairo-boilerplate-qt.o): undefined reference to symbol '__gxx_personality_v0@@CXXABI_1.3'
> //usr/lib/x86_64-linux-gnu/libstdc++.so.6: error adding symbols: DSO missing from command line
> collect2: error: ld returned 1 exit status
>
> When using g++ to compile and link code, g++ automatically links
> libstdc++.  However, in cairo we're using g++ only to compile, so need
> to explicitly link against libstdc++ for backends that need iostream,
> stl, or other stdc++ features.
>
> Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=59038
> Signed-off-by: Bryce Harrington <b.harrington at samsung.com>

Reviewed-by: Uli Schlachter <psychon at znc.in>

> ---
>   configure.ac | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/configure.ac b/configure.ac
> index 9f38d30..02106f3 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -191,6 +191,7 @@ CAIRO_ENABLE_SURFACE_BACKEND(qt, Qt, no, [
>   		    [qt_REQUIRES=""
>   		     use_qt="no (requires Qt4 development libraries)"
>   		     ])
> +  qt_NONPKGCONFIG_LIBS="-lstdc++"
>   ])
>
>   dnl ===========================================================================
>