[FFmpeg-devel] [PATCH] configure: check if dlfcn.h is present for ladspa and frei0r, if not abort early

[James Almer]

On 12/2/2018 2:51 PM, Paul B Mahol wrote:
> Fixes #4517.
> 
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
>  configure | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/configure b/configure
> index 2af6c0d797..7c55274efa 100755
> --- a/configure
> +++ b/configure
> @@ -6065,11 +6065,11 @@ enabled chromaprint       && require chromaprint chromaprint.h chromaprint_get_v
>  enabled decklink          && { require_headers DeckLinkAPI.h &&
>                                 { test_cpp_condition DeckLinkAPIVersion.h "BLACKMAGIC_DECKLINK_API_VERSION >= 0x0a090500" || die "ERROR: Decklink API version must be >= 10.9.5."; } }
>  enabled libndi_newtek     && require_headers Processing.NDI.Lib.h
> -enabled frei0r            && require_headers frei0r.h
> +enabled frei0r            && require_headers frei0r.h && require_headers dlfcn.h
>  enabled gmp               && require gmp gmp.h mpz_export -lgmp
>  enabled gnutls            && require_pkg_config gnutls gnutls gnutls/gnutls.h gnutls_global_init
>  enabled jni               && { [ $target_os = "android" ] && check_headers jni.h && enabled pthreads || die "ERROR: jni not found"; }
> -enabled ladspa            && require_headers ladspa.h
> +enabled ladspa            && require_headers ladspa.h && require_headers dlfcn.h
>  enabled libaom            && require_pkg_config libaom "aom >= 1.0.0" aom/aom_codec.h aom_codec_version
>  enabled lv2               && require_pkg_config lv2 lilv-0 "lilv/lilv.h" lilv_world_new
>  enabled libiec61883       && require libiec61883 libiec61883/iec61883.h iec61883_cmp_connect -lraw1394 -lavc1394 -lrom1394 -liec61883
> 

Both filters already depend on libdl being present, which also implies
dlfcn.h (The check for libdl uses it). How is that not enough?