Ports: Build shared libraries for ffmpeg

Author: https://github.com/gunnarbeutner
Commit: https://github.com/SerenityOS/serenity/commit/fc2ddd5843d
Pull-request: https://github.com/SerenityOS/serenity/pull/6962

Ports/ffmpeg/package.sh

@@ -2,6 +2,7 @@
 port=ffmpeg
 version=4.4
 useconfigure=true
+depends="libiconv libtiff xz bzip"
 files="https://ffmpeg.org/releases/ffmpeg-${version}.tar.gz ffmpeg-${version}.tar.gz a4abede145de22eaf233baa1726e38e137f5698d9edd61b5763cd02b883f3c7c"
 auth_type="sha256"
 installopts="INSTALL_TOP=${SERENITY_INSTALL_ROOT}/usr/local"
@@ -15,3 +16,11 @@ configure() {
         --disable-network \
         --enable-cross-compile
 }
+
+install() {
+    run make DESTDIR=${SERENITY_INSTALL_ROOT} $installopts install
+    for lib in libavcodec libavdevice libavfilter libavformat libavutil; do
+        ${CC} -shared -o ${SERENITY_INSTALL_ROOT}/usr/local/lib/${lib}.so -Wl,-soname,${lib} -Wl,--whole-archive ${SERENITY_INSTALL_ROOT}/usr/local/lib/${lib}.a -Wl,--no-whole-archive -liconv -ltiff -llzma -lbz2
+        rm -f ${SERENITY_INSTALL_ROOT}/usr/local/lib/$lib.la
+    done
+}