build: revert libelf to master state but keep config.guess copy via &&

Author: frangarcj

CMakeLists.txt

@@ -188,14 +188,11 @@ function(toolchain_deps toolchain_deps_dir toolchain_install_dir toolchain_suffi
         )
 
     ExternalProject_add(libelf${suffix}
-        DEPENDS zlib${suffix}
         URL https://github.com/vitasdk/artifacts/releases/download/libelf-${LIBELF_VERSION}/libelf-${LIBELF_VERSION}.tar.gz
         URL_HASH ${LIBELF_HASH}
         DOWNLOAD_DIR ${DOWNLOAD_DIR}
-        DOWNLOAD_EXTRACT_TIMESTAMP TRUE
-        PATCH_COMMAND patch -d <SOURCE_DIR> -p3 -t -N < ${PROJECT_SOURCE_DIR}/patches/libelf.patch
-        COMMAND ${CMAKE_COMMAND} -E copy ${PROJECT_SOURCE_DIR}/config.guess ${PROJECT_SOURCE_DIR}/config.sub <SOURCE_DIR>/
-        CONFIGURE_COMMAND CFLAGS=-std=gnu99 CC=${cc_compiler} RANLIB=${ranlib} ${compiler_flags} ${wrapper_command} <SOURCE_DIR>/configure
+        PATCH_COMMAND patch -d <SOURCE_DIR> -p3 -t -N < ${PROJECT_SOURCE_DIR}/patches/libelf.patch && ${CMAKE_COMMAND} -E copy ${PROJECT_SOURCE_DIR}/config.guess ${PROJECT_SOURCE_DIR}/config.sub <SOURCE_DIR>/
+        CONFIGURE_COMMAND autoreconf -i <SOURCE_DIR> COMMAND CC=${cc_compiler} RANLIB=${ranlib} ${compiler_flags} ${wrapper_command} <SOURCE_DIR>/configure
         --build=${build_native}
         --host=${toolchain_host}
         --prefix=${toolchain_deps_dir}