MacOs fix

Author: markus-perl

build-ffmpeg

@@ -759,7 +759,7 @@ if build "libwebp" "1.2.1"; then
   # libwebp can fail to compile on Ubuntu if these flags were left set to CFLAGS
   CPPFLAGS=
   download "https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-1.2.1.tar.gz" "libwebp-1.2.1.tar.gz"
-  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --with-zlib-include="${WORKSPACE}"/include/ --with-zlib-lib="${WORKSPACE}"/lib
+  execute ./configure --prefix="${WORKSPACE}" --disable-shared --enable-static --disable-gif --with-zlib-include="${WORKSPACE}"/include/ --with-zlib-lib="${WORKSPACE}"/lib
   make_dir build
   cd build || exit
   execute cmake -DCMAKE_INSTALL_PREFIX="${WORKSPACE}" -DCMAKE_INSTALL_LIBDIR=lib -DCMAKE_INSTALL_BINDIR=bin -DCMAKE_INSTALL_INCLUDEDIR=include -DENABLE_SHARED=OFF -DENABLE_STATIC=ON ../