[vlc-devel] [PATCH] [RFC] Configure: enable LTO if present

[Steve Lhomme]

This seems to make compilation much slower. Can we only do it on
non-debug builds ?
Other than that it's probably a good idea.

On Mon, Jul 31, 2017 at 11:41 PM, Jean-Baptiste Kempf <jb at videolan.org> wrote:
> ---
>  configure.ac | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/configure.ac b/configure.ac
> index e303715514..fe7e273ea0 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -1049,6 +1049,12 @@ AS_IF([test "${enable_optimizations}" != "no"], [
>    RDC_PROG_CXX_FFLAGS([no-math-errno unsafe-math-optimizations no-rounding-math no-signaling-nans cx-limited-range])
>    AC_LANG_POP
>
> +  dnl Check for LTO
> +  RDC_PROG_CC_FFLAGS([lto])
> +  AC_LANG_PUSH(C++)
> +  RDC_PROG_CXX_FFLAGS([lto])
> +  AC_LANG_POP
> +
>  AH_BOTTOM([
>  #if defined(_MSC_VER) && !defined(__clang__)
>  # pragma fenv_access(off)
> --
> 2.13.3
>
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