fix building with older curl

Author: ChristopherHX

ext/curl.cmake

@@ -27,6 +27,7 @@ if (DEFINED CMAKE_TOOLCHAIN_FILE)
     list(APPEND CURL_EXT_EXTRA_OPTIONS "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}")
 endif()
 
+# -DCMAKE_INSTALL_LIBDIR=lib is required to find libcurl.a on fedora, default is lib64
 if(OWN_CURL_SOURCE_DIR)
     set(CURL_EXT_PROPERTIES SOURCE_DIR ${OWN_CURL_SOURCE_DIR})
 else()
@@ -37,7 +38,6 @@ endif()
 ExternalProject_Add(
         curl_ext
         ${CURL_EXT_PROPERTIES}
-        DOWNLOAD_EXTRACT_TIMESTAMP TRUE
         INSTALL_DIR ${CMAKE_BINARY_DIR}/ext/curl
         BUILD_BYPRODUCTS "${CMAKE_BINARY_DIR}/ext/curl/lib/libcurl.a"
         CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX=${CMAKE_BINARY_DIR}/ext/curl" "-DBUILD_CURL_EXE=OFF" "-DBUILD_SHARED_LIBS=OFF" "-DCURL_STATICLIB=ON" "-DCURL_DISABLE_LDAP=ON" "-DCURL_USE_LIBSSH2=OFF" "-DCURL_USE_OPENLDAP=OFF" "-DUSE_LIBIDN2=OFF" "-DCURL_USE_LIBPSL=OFF" "-DENABLE_WEBSOCKETS=ON" "-DCMAKE_INSTALL_LIBDIR=lib" "-DCMAKE_ASM_COMPILER=${CMAKE_ASM_COMPILER}" "-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}" "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}" "-DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}" "-DCMAKE_LINK_FLAGS=${CMAKE_LINK_FLAGS}" "-DCMAKE_LIBRARY_ARCHITECTURE=${CMAKE_LIBRARY_ARCHITECTURE}" ${CURL_EXT_EXTRA_OPTIONS}