Alan Coopersmith wrote:
> Signed-off-by: Alan Coopersmith <alan.coopersm...@sun.com>
> ---
>  configure.ac |    9 ++++++++-
>  1 files changed, 8 insertions(+), 1 deletions(-)
> 
> diff --git a/configure.ac b/configure.ac
> index d01d0f1..f121002 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -96,7 +96,14 @@ esac
>  
>  dnl Add flags for gcc and g++
>  if test "x$GCC" = xyes; then
> -    CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math 
> -fvisibility=hidden"
> +    CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -std=c99 -ffast-math"
> +
> +    # Enable -fvisibility=hidden if using a gcc that supports it
> +    save_CFLAGS="$CFLAGS"
> +    AC_MSG_CHECKING([whether $(CC) supports -fvisibility=hidden])
> +    CFLAGS="$CFLAGS -fvisibility=hidden"
> +    AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
> +                [CFLAGS="$save_CFLAGS" ; AC_MSG_RESULT([no])]);
>  
>      # Work around aliasing bugs - developers should comment this out
>      CFLAGS="$CFLAGS -fno-strict-aliasing"

I'm not the configure guy, but this looks OK to me.

-Brian


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