Update squashfuse and add support for Zstd

This update allows us to remove all the patches and makes the configuration step a lot easier, too.

cmake/dependencies.cmake

@@ -36,6 +36,9 @@ set(LDFLAGS ${DEPENDENCIES_LDFLAGS})
 if (NOT LIBAPPIMAGE_SHARED_ONLY)
     import_pkgconfig_target(TARGET_NAME liblzma PKGCONFIG_TARGET liblzma)
 
+    import_pkgconfig_target(TARGET_NAME libzstd PKGCONFIG_TARGET libzstd)
+
+
     # as distros don't provide suitable squashfuse and squashfs-tools, those dependencies are bundled in, can, and should
     # be used from this repository for AppImageKit
     # for distro packaging, it can be linked to an existing package just fine
@@ -48,27 +51,16 @@ if (NOT LIBAPPIMAGE_SHARED_ONLY)
         import_pkgconfig_target(TARGET_NAME libfuse PKGCONFIG_TARGET fuse)
 
         # TODO: implement out-of-source builds for squashfuse, as for the other dependencies
-        configure_file(
-            ${CMAKE_CURRENT_SOURCE_DIR}/src/patches/patch-squashfuse.sh.in
-            ${CMAKE_CURRENT_BINARY_DIR}/patch-squashfuse.sh
-            @ONLY
-        )
 
         ExternalProject_Add(
             squashfuse-EXTERNAL
             GIT_REPOSITORY https://github.com/vasi/squashfuse/
-            GIT_TAG 1f98030
+            # release 0.5.2
+            GIT_TAG 775b4cc72ab47641637897f11ce0da15d5c1f115
             UPDATE_COMMAND ""  # make sure CMake won't try to fetch updates unnecessarily and hence rebuild the dependency every time
-            PATCH_COMMAND bash -xe ${CMAKE_CURRENT_BINARY_DIR}/patch-squashfuse.sh
-            CONFIGURE_COMMAND ${LIBTOOLIZE} --force
-            COMMAND env ACLOCAL_FLAGS="-I /usr/share/aclocal" aclocal
-            COMMAND ${AUTOHEADER}
-            COMMAND ${AUTOMAKE} --force-missing --add-missing
-            COMMAND ${AUTORECONF} -fi || true
-            COMMAND ${SED} -i "/PKG_CHECK_MODULES.*/,/,:./d" configure  # https://github.com/vasi/squashfuse/issues/12
+            CONFIGURE_COMMAND <SOURCE_DIR>/autogen.sh
             COMMAND ${SED} -i "s/typedef off_t sqfs_off_t/typedef int64_t sqfs_off_t/g" common.h  # off_t's size might differ, see https://stackoverflow.com/a/9073762
-            COMMAND CC=${CC} CXX=${CXX} CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} <SOURCE_DIR>/configure --disable-demo --disable-high-level --without-lzo --without-lz4 --prefix=<INSTALL_DIR> --libdir=<INSTALL_DIR>/lib --with-xz=${xz_PREFIX} ${EXTRA_CONFIGURE_FLAGS}
-            COMMAND ${SED} -i "s|XZ_LIBS = -llzma |XZ_LIBS = -Bstatic ${xz_LIBRARIES}/|g" Makefile
+            COMMAND CC=${CC} CXX=${CXX} CFLAGS=${CFLAGS} LDFLAGS=${LDFLAGS} <SOURCE_DIR>/configure --disable-demo --disable-high-level --without-lzo --without-lz4 --prefix=<INSTALL_DIR> --libdir=<INSTALL_DIR>/lib ${EXTRA_CONFIGURE_FLAGS}
             BUILD_COMMAND ${MAKE}
             BUILD_IN_SOURCE ON
             INSTALL_COMMAND ${MAKE} install
@@ -85,6 +77,7 @@ if (NOT LIBAPPIMAGE_SHARED_ONLY)
         target_link_libraries(
             libsquashfuse
             INTERFACE liblzma
+            INTERFACE libzstd
             INTERFACE libzlib
         )
     else()