[yocto] [matchbox-wm][PATCH] configure.ac: add lib math for composite enabled builds

[Burton, Ross]

On 26 March 2018 at 11:26, Awais Belal <awais_belal at mentor.com> wrote:
> The composite enabled builds require lib math to be
> present on the linker command line otherwise we get
> ld: composite-engine.o: undefined reference to symbol 'exp@@GLIBC_2.2.5'
> during compilation.
>
> Signed-off-by: Awais Belal <awais_belal at mentor.com>
> ---
>  configure.ac | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index dce82cc..1bc113f 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -246,9 +246,11 @@ fi
>  dnl ------ Composite -------------------------------------------------------
>
>  if test x$enable_composite != xno; then
> -  PKG_CHECK_MODULES(COMPO, xcomposite xfixes xdamage xrender, ,
> +  PKG_CHECK_MODULES(COMPO, xcomposite xfixes xdamage xrender, have_compo_deps=yes,
>                            AC_MSG_ERROR([*** Required Composite Librays not installed ***]))
> -
> +  if test x$have_compo_deps = xyes; then
> +    COMPO_LIBS="$COMPO_LIBS -lm"
> +  fi

There's no way that test can fail as if the packages are not found,
configure aborts.  Just do the assignment without the test.

Ross