lwip.py: Remove usage of YAML

YAML is not supported in base Python installs and so is not safe to
blindly assume is available. This swaps existing usage to JSON to be
more compatible.

4 files changed, 251 insertions, 249 deletions

diff --git a/file-import.json b/file-import.json
new file mode 100644
index 0000000..da30616
--- /dev/null
+++ b/file-import.json
@@ -0,0 +1,246 @@
+{
+  "files-to-import" : [
+    "src/core/altcp_alloc.c",
+    "src/core/def.c",
+    "src/core/mem.c",
+    "src/core/altcp.c",
+    "src/core/altcp_tcp.c",
+    "src/core/raw.c",
+    "src/core/tcp_out.c",
+    "src/core/pbuf.c",
+    "src/core/ip.c",
+    "src/core/init.c",
+    "src/core/timeouts.c",
+    "src/core/inet_chksum.c",
+    "src/core/sys.c",
+    "src/core/memp.c",
+    "src/core/dns.c",
+    "src/core/tcp.c",
+    "src/core/udp.c",
+    "src/core/netif.c",
+    "src/core/stats.c",
+    "src/core/tcp_in.c",
+    "src/core/ipv6/mld6.c",
+    "src/core/ipv6/dhcp6.c",
+    "src/core/ipv6/nd6.c",
+    "src/core/ipv6/inet6.c",
+    "src/core/ipv6/ip6_frag.c",
+    "src/core/ipv6/ip6_addr.c",
+    "src/core/ipv6/icmp6.c",
+    "src/core/ipv6/ethip6.c",
+    "src/core/ipv6/ip6.c",
+    "src/core/ipv4/icmp.c",
+    "src/core/ipv4/autoip.c",
+    "src/core/ipv4/ip4_addr.c",
+    "src/core/ipv4/ip4_frag.c",
+    "src/core/ipv4/ip4.c",
+    "src/core/ipv4/igmp.c",
+    "src/core/ipv4/etharp.c",
+    "src/core/ipv4/dhcp.c",
+    "src/api/sockets.c",
+    "src/api/netdb.c",
+    "src/api/netbuf.c",
+    "src/api/api_lib.c",
+    "src/api/api_msg.c",
+    "src/api/tcpip.c",
+    "src/api/netifapi.c",
+    "src/api/if_api.c",
+    "src/api/err.c",
+    "src/netif/ethernet.c",
+    "src/netif/bridgeif_fdb.c",
+    "src/netif/lowpan6.c",
+    "src/netif/slipif.c",
+    "src/netif/lowpan6_ble.c",
+    "src/netif/zepif.c",
+    "src/netif/lowpan6_common.c",
+    "src/netif/bridgeif.c",
+    "src/netif/ppp/pppol2tp.c",
+    "src/netif/ppp/magic.c",
+    "src/netif/ppp/ppp.c",
+    "src/netif/ppp/utils.c",
+    "src/netif/ppp/ipcp.c",
+    "src/netif/ppp/pppoe.c",
+    "src/netif/ppp/eui64.c",
+    "src/netif/ppp/vj.c",
+    "src/netif/ppp/pppapi.c",
+    "src/netif/ppp/lcp.c",
+    "src/netif/ppp/demand.c",
+    "src/netif/ppp/upap.c",
+    "src/netif/ppp/chap_ms.c",
+    "src/netif/ppp/eap.c",
+    "src/netif/ppp/multilink.c",
+    "src/netif/ppp/pppos.c",
+    "src/netif/ppp/auth.c",
+    "src/netif/ppp/fsm.c",
+    "src/netif/ppp/mppe.c",
+    "src/netif/ppp/chap-new.c",
+    "src/netif/ppp/ecp.c",
+    "src/netif/ppp/ipv6cp.c",
+    "src/netif/ppp/ccp.c",
+    "src/netif/ppp/chap-md5.c",
+    "src/netif/ppp/pppcrypt.c",
+    "src/netif/ppp/polarssl/sha1.c",
+    "src/netif/ppp/polarssl/md5.c",
+    "src/netif/ppp/polarssl/des.c",
+    "src/netif/ppp/polarssl/arc4.c",
+    "src/netif/ppp/polarssl/md4.c",
+    "src/include/compat/posix/netdb.h",
+    "src/include/compat/posix/sys/socket.h",
+    "src/include/compat/posix/arpa/inet.h",
+    "src/include/compat/posix/net/if.h",
+    "src/include/compat/stdc/errno.h",
+    "src/include/lwip/mld6.h",
+    "src/include/lwip/tcpbase.h",
+    "src/include/lwip/inet_chksum.h",
+    "src/include/lwip/sys.h",
+    "src/include/lwip/def.h",
+    "src/include/lwip/init.h.cmake.in",
+    "src/include/lwip/netifapi.h",
+    "src/include/lwip/errno.h",
+    "src/include/lwip/memp.h",
+    "src/include/lwip/err.h",
+    "src/include/lwip/dhcp6.h",
+    "src/include/lwip/netif.h",
+    "src/include/lwip/arch.h",
+    "src/include/lwip/mem.h",
+    "src/include/lwip/snmp.h",
+    "src/include/lwip/sockets.h",
+    "src/include/lwip/icmp.h",
+    "src/include/lwip/dhcp.h",
+    "src/include/lwip/if_api.h",
+    "src/include/lwip/ip_addr.h",
+    "src/include/lwip/ip6_addr.h",
+    "src/include/lwip/ethip6.h",
+    "src/include/lwip/udp.h",
+    "src/include/lwip/netbuf.h",
+    "src/include/lwip/ip6.h",
+    "src/include/lwip/altcp.h",
+    "src/include/lwip/etharp.h",
+    "src/include/lwip/altcp_tls.h",
+    "src/include/lwip/opt.h",
+    "src/include/lwip/stats.h",
+    "src/include/lwip/api.h",
+    "src/include/lwip/ip4_frag.h",
+    "src/include/lwip/sio.h",
+    "src/include/lwip/inet.h",
+    "src/include/lwip/ip6_frag.h",
+    "src/include/lwip/ip6_zone.h",
+    "src/include/lwip/tcpip.h",
+    "src/include/lwip/autoip.h",
+    "src/include/lwip/dns.h",
+    "src/include/lwip/igmp.h",
+    "src/include/lwip/timeouts.h",
+    "src/include/lwip/icmp6.h",
+    "src/include/lwip/pbuf.h",
+    "src/include/lwip/ip4.h",
+    "src/include/lwip/nd6.h",
+    "src/include/lwip/altcp_tcp.h",
+    "src/include/lwip/tcp.h",
+    "src/include/lwip/debug.h",
+    "src/include/lwip/raw.h",
+    "src/include/lwip/init.h",
+    "src/include/lwip/ip.h",
+    "src/include/lwip/netdb.h",
+    "src/include/lwip/ip4_addr.h",
+    "src/include/lwip/priv/api_msg.h",
+    "src/include/lwip/priv/tcpip_priv.h",
+    "src/include/lwip/priv/raw_priv.h",
+    "src/include/lwip/priv/nd6_priv.h",
+    "src/include/lwip/priv/altcp_priv.h",
+    "src/include/lwip/priv/sockets_priv.h",
+    "src/include/lwip/priv/memp_priv.h",
+    "src/include/lwip/priv/memp_std.h",
+    "src/include/lwip/priv/tcp_priv.h",
+    "src/include/lwip/priv/mem_priv.h",
+    "src/include/lwip/prot/mld6.h",
+    "src/include/lwip/prot/dhcp6.h",
+    "src/include/lwip/prot/ethernet.h",
+    "src/include/lwip/prot/ieee.h",
+    "src/include/lwip/prot/icmp.h",
+    "src/include/lwip/prot/dhcp.h",
+    "src/include/lwip/prot/iana.h",
+    "src/include/lwip/prot/udp.h",
+    "src/include/lwip/prot/ip6.h",
+    "src/include/lwip/prot/etharp.h",
+    "src/include/lwip/prot/autoip.h",
+    "src/include/lwip/prot/dns.h",
+    "src/include/lwip/prot/igmp.h",
+    "src/include/lwip/prot/icmp6.h",
+    "src/include/lwip/prot/ip4.h",
+    "src/include/lwip/prot/nd6.h",
+    "src/include/lwip/prot/tcp.h",
+    "src/include/lwip/prot/ip.h",
+    "src/include/lwip/apps/FILES",
+    "src/include/lwip/apps/mqtt_opts.h",
+    "src/include/lwip/apps/lwiperf.h",
+    "src/include/lwip/apps/snmp_snmpv2_usm.h",
+    "src/include/lwip/apps/httpd.h",
+    "src/include/lwip/apps/snmp_table.h",
+    "src/include/lwip/apps/snmp_scalar.h",
+    "src/include/lwip/apps/altcp_tls_mbedtls_opts.h",
+    "src/include/lwip/apps/snmp.h",
+    "src/include/lwip/apps/snmp_opts.h",
+    "src/include/lwip/apps/mdns.h",
+    "src/include/lwip/apps/fs.h",
+    "src/include/lwip/apps/tftp_opts.h",
+    "src/include/lwip/apps/mqtt_priv.h",
+    "src/include/lwip/apps/snmp_threadsync.h",
+    "src/include/lwip/apps/mdns_priv.h",
+    "src/include/lwip/apps/smtp.h",
+    "src/include/lwip/apps/netbiosns.h",
+    "src/include/lwip/apps/altcp_proxyconnect.h",
+    "src/include/lwip/apps/netbiosns_opts.h",
+    "src/include/lwip/apps/sntp.h",
+    "src/include/lwip/apps/snmp_snmpv2_framework.h",
+    "src/include/lwip/apps/tftp_server.h",
+    "src/include/lwip/apps/sntp_opts.h",
+    "src/include/lwip/apps/smtp_opts.h",
+    "src/include/lwip/apps/snmpv3.h",
+    "src/include/lwip/apps/mdns_opts.h",
+    "src/include/lwip/apps/snmp_core.h",
+    "src/include/lwip/apps/snmp_mib2.h",
+    "src/include/lwip/apps/http_client.h",
+    "src/include/lwip/apps/httpd_opts.h",
+    "src/include/lwip/apps/mqtt.h",
+    "src/include/netif/ethernet.h",
+    "src/include/netif/zepif.h",
+    "src/include/netif/lowpan6_common.h",
+    "src/include/netif/slipif.h",
+    "src/include/netif/bridgeif.h",
+    "src/include/netif/etharp.h",
+    "src/include/netif/bridgeif_opts.h",
+    "src/include/netif/lowpan6.h",
+    "src/include/netif/ieee802154.h",
+    "src/include/netif/lowpan6_opts.h",
+    "src/include/netif/lowpan6_ble.h",
+    "src/include/netif/ppp/magic.h",
+    "src/include/netif/ppp/pppapi.h",
+    "src/include/netif/ppp/ecp.h",
+    "src/include/netif/ppp/mppe.h",
+    "src/include/netif/ppp/pppoe.h",
+    "src/include/netif/ppp/ppp.h",
+    "src/include/netif/ppp/vj.h",
+    "src/include/netif/ppp/upap.h",
+    "src/include/netif/ppp/ipcp.h",
+    "src/include/netif/ppp/pppol2tp.h",
+    "src/include/netif/ppp/chap_ms.h",
+    "src/include/netif/ppp/chap-md5.h",
+    "src/include/netif/ppp/eui64.h",
+    "src/include/netif/ppp/eap.h",
+    "src/include/netif/ppp/lcp.h",
+    "src/include/netif/ppp/pppcrypt.h",
+    "src/include/netif/ppp/ppp_opts.h",
+    "src/include/netif/ppp/pppos.h",
+    "src/include/netif/ppp/ccp.h",
+    "src/include/netif/ppp/chap-new.h",
+    "src/include/netif/ppp/ppp_impl.h",
+    "src/include/netif/ppp/pppdebug.h",
+    "src/include/netif/ppp/ipv6cp.h",
+    "src/include/netif/ppp/fsm.h",
+    "src/include/netif/ppp/polarssl/arc4.h",
+    "src/include/netif/ppp/polarssl/sha1.h",
+    "src/include/netif/ppp/polarssl/md4.h",
+    "src/include/netif/ppp/polarssl/des.h",
+    "src/include/netif/ppp/polarssl/md5.h"
+  ]
+}
diff --git a/file-import.yaml b/file-import.yaml
deleted file mode 100644
index 9e362bf..0000000
--- a/file-import.yaml
+++ /dev/null
@@ -1,243 +0,0 @@
-files-to-import:
-    - src/core/altcp_alloc.c
-    - src/core/def.c
-    - src/core/mem.c
-    - src/core/altcp.c
-    - src/core/altcp_tcp.c
-    - src/core/raw.c
-    - src/core/tcp_out.c
-    - src/core/pbuf.c
-    - src/core/ip.c
-    - src/core/init.c
-    - src/core/timeouts.c
-    - src/core/inet_chksum.c
-    - src/core/sys.c
-    - src/core/memp.c
-    - src/core/dns.c
-    - src/core/tcp.c
-    - src/core/udp.c
-    - src/core/netif.c
-    - src/core/stats.c
-    - src/core/tcp_in.c
-    - src/core/ipv6/mld6.c
-    - src/core/ipv6/dhcp6.c
-    - src/core/ipv6/nd6.c
-    - src/core/ipv6/inet6.c
-    - src/core/ipv6/ip6_frag.c
-    - src/core/ipv6/ip6_addr.c
-    - src/core/ipv6/icmp6.c
-    - src/core/ipv6/ethip6.c
-    - src/core/ipv6/ip6.c
-    - src/core/ipv4/icmp.c
-    - src/core/ipv4/autoip.c
-    - src/core/ipv4/ip4_addr.c
-    - src/core/ipv4/ip4_frag.c
-    - src/core/ipv4/ip4.c
-    - src/core/ipv4/igmp.c
-    - src/core/ipv4/etharp.c
-    - src/core/ipv4/dhcp.c
-    - src/api/sockets.c
-    - src/api/netdb.c
-    - src/api/netbuf.c
-    - src/api/api_lib.c
-    - src/api/api_msg.c
-    - src/api/tcpip.c
-    - src/api/netifapi.c
-    - src/api/if_api.c
-    - src/api/err.c
-    - src/netif/ethernet.c
-    - src/netif/bridgeif_fdb.c
-    - src/netif/lowpan6.c
-    - src/netif/slipif.c
-    - src/netif/lowpan6_ble.c
-    - src/netif/zepif.c
-    - src/netif/lowpan6_common.c
-    - src/netif/bridgeif.c
-    - src/netif/ppp/pppol2tp.c
-    - src/netif/ppp/magic.c
-    - src/netif/ppp/ppp.c
-    - src/netif/ppp/utils.c
-    - src/netif/ppp/ipcp.c
-    - src/netif/ppp/pppoe.c
-    - src/netif/ppp/eui64.c
-    - src/netif/ppp/vj.c
-    - src/netif/ppp/pppapi.c
-    - src/netif/ppp/lcp.c
-    - src/netif/ppp/demand.c
-    - src/netif/ppp/upap.c
-    - src/netif/ppp/chap_ms.c
-    - src/netif/ppp/eap.c
-    - src/netif/ppp/multilink.c
-    - src/netif/ppp/pppos.c
-    - src/netif/ppp/auth.c
-    - src/netif/ppp/fsm.c
-    - src/netif/ppp/mppe.c
-    - src/netif/ppp/chap-new.c
-    - src/netif/ppp/ecp.c
-    - src/netif/ppp/ipv6cp.c
-    - src/netif/ppp/ccp.c
-    - src/netif/ppp/chap-md5.c
-    - src/netif/ppp/pppcrypt.c
-    - src/netif/ppp/polarssl/sha1.c
-    - src/netif/ppp/polarssl/md5.c
-    - src/netif/ppp/polarssl/des.c
-    - src/netif/ppp/polarssl/arc4.c
-    - src/netif/ppp/polarssl/md4.c
-    - src/include/compat/posix/netdb.h
-    - src/include/compat/posix/sys/socket.h
-    - src/include/compat/posix/arpa/inet.h
-    - src/include/compat/posix/net/if.h
-    - src/include/compat/stdc/errno.h
-    - src/include/lwip/mld6.h
-    - src/include/lwip/tcpbase.h
-    - src/include/lwip/inet_chksum.h
-    - src/include/lwip/sys.h
-    - src/include/lwip/def.h
-    - src/include/lwip/init.h.cmake.in
-    - src/include/lwip/netifapi.h
-    - src/include/lwip/errno.h
-    - src/include/lwip/memp.h
-    - src/include/lwip/err.h
-    - src/include/lwip/dhcp6.h
-    - src/include/lwip/netif.h
-    - src/include/lwip/arch.h
-    - src/include/lwip/mem.h
-    - src/include/lwip/snmp.h
-    - src/include/lwip/sockets.h
-    - src/include/lwip/icmp.h
-    - src/include/lwip/dhcp.h
-    - src/include/lwip/if_api.h
-    - src/include/lwip/ip_addr.h
-    - src/include/lwip/ip6_addr.h
-    - src/include/lwip/ethip6.h
-    - src/include/lwip/udp.h
-    - src/include/lwip/netbuf.h
-    - src/include/lwip/ip6.h
-    - src/include/lwip/altcp.h
-    - src/include/lwip/etharp.h
-    - src/include/lwip/altcp_tls.h
-    - src/include/lwip/opt.h
-    - src/include/lwip/stats.h
-    - src/include/lwip/api.h
-    - src/include/lwip/ip4_frag.h
-    - src/include/lwip/sio.h
-    - src/include/lwip/inet.h
-    - src/include/lwip/ip6_frag.h
-    - src/include/lwip/ip6_zone.h
-    - src/include/lwip/tcpip.h
-    - src/include/lwip/autoip.h
-    - src/include/lwip/dns.h
-    - src/include/lwip/igmp.h
-    - src/include/lwip/timeouts.h
-    - src/include/lwip/icmp6.h
-    - src/include/lwip/pbuf.h
-    - src/include/lwip/ip4.h
-    - src/include/lwip/nd6.h
-    - src/include/lwip/altcp_tcp.h
-    - src/include/lwip/tcp.h
-    - src/include/lwip/debug.h
-    - src/include/lwip/raw.h
-    - src/include/lwip/init.h
-    - src/include/lwip/ip.h
-    - src/include/lwip/netdb.h
-    - src/include/lwip/ip4_addr.h
-    - src/include/lwip/priv/api_msg.h
-    - src/include/lwip/priv/tcpip_priv.h
-    - src/include/lwip/priv/raw_priv.h
-    - src/include/lwip/priv/nd6_priv.h
-    - src/include/lwip/priv/altcp_priv.h
-    - src/include/lwip/priv/sockets_priv.h
-    - src/include/lwip/priv/memp_priv.h
-    - src/include/lwip/priv/memp_std.h
-    - src/include/lwip/priv/tcp_priv.h
-    - src/include/lwip/priv/mem_priv.h
-    - src/include/lwip/prot/mld6.h
-    - src/include/lwip/prot/dhcp6.h
-    - src/include/lwip/prot/ethernet.h
-    - src/include/lwip/prot/ieee.h
-    - src/include/lwip/prot/icmp.h
-    - src/include/lwip/prot/dhcp.h
-    - src/include/lwip/prot/iana.h
-    - src/include/lwip/prot/udp.h
-    - src/include/lwip/prot/ip6.h
-    - src/include/lwip/prot/etharp.h
-    - src/include/lwip/prot/autoip.h
-    - src/include/lwip/prot/dns.h
-    - src/include/lwip/prot/igmp.h
-    - src/include/lwip/prot/icmp6.h
-    - src/include/lwip/prot/ip4.h
-    - src/include/lwip/prot/nd6.h
-    - src/include/lwip/prot/tcp.h
-    - src/include/lwip/prot/ip.h
-    - src/include/lwip/apps/FILES
-    - src/include/lwip/apps/mqtt_opts.h
-    - src/include/lwip/apps/lwiperf.h
-    - src/include/lwip/apps/snmp_snmpv2_usm.h
-    - src/include/lwip/apps/httpd.h
-    - src/include/lwip/apps/snmp_table.h
-    - src/include/lwip/apps/snmp_scalar.h
-    - src/include/lwip/apps/altcp_tls_mbedtls_opts.h
-    - src/include/lwip/apps/snmp.h
-    - src/include/lwip/apps/snmp_opts.h
-    - src/include/lwip/apps/mdns.h
-    - src/include/lwip/apps/fs.h
-    - src/include/lwip/apps/tftp_opts.h
-    - src/include/lwip/apps/mqtt_priv.h
-    - src/include/lwip/apps/snmp_threadsync.h
-    - src/include/lwip/apps/mdns_priv.h
-    - src/include/lwip/apps/smtp.h
-    - src/include/lwip/apps/netbiosns.h
-    - src/include/lwip/apps/altcp_proxyconnect.h
-    - src/include/lwip/apps/netbiosns_opts.h
-    - src/include/lwip/apps/sntp.h
-    - src/include/lwip/apps/snmp_snmpv2_framework.h
-    - src/include/lwip/apps/tftp_server.h
-    - src/include/lwip/apps/sntp_opts.h
-    - src/include/lwip/apps/smtp_opts.h
-    - src/include/lwip/apps/snmpv3.h
-    - src/include/lwip/apps/mdns_opts.h
-    - src/include/lwip/apps/snmp_core.h
-    - src/include/lwip/apps/snmp_mib2.h
-    - src/include/lwip/apps/http_client.h
-    - src/include/lwip/apps/httpd_opts.h
-    - src/include/lwip/apps/mqtt.h
-    - src/include/netif/ethernet.h
-    - src/include/netif/zepif.h
-    - src/include/netif/lowpan6_common.h
-    - src/include/netif/slipif.h
-    - src/include/netif/bridgeif.h
-    - src/include/netif/etharp.h
-    - src/include/netif/bridgeif_opts.h
-    - src/include/netif/lowpan6.h
-    - src/include/netif/ieee802154.h
-    - src/include/netif/lowpan6_opts.h
-    - src/include/netif/lowpan6_ble.h
-    - src/include/netif/ppp/magic.h
-    - src/include/netif/ppp/pppapi.h
-    - src/include/netif/ppp/ecp.h
-    - src/include/netif/ppp/mppe.h
-    - src/include/netif/ppp/pppoe.h
-    - src/include/netif/ppp/ppp.h
-    - src/include/netif/ppp/vj.h
-    - src/include/netif/ppp/upap.h
-    - src/include/netif/ppp/ipcp.h
-    - src/include/netif/ppp/pppol2tp.h
-    - src/include/netif/ppp/chap_ms.h
-    - src/include/netif/ppp/chap-md5.h
-    - src/include/netif/ppp/eui64.h
-    - src/include/netif/ppp/eap.h
-    - src/include/netif/ppp/lcp.h
-    - src/include/netif/ppp/pppcrypt.h
-    - src/include/netif/ppp/ppp_opts.h
-    - src/include/netif/ppp/pppos.h
-    - src/include/netif/ppp/ccp.h
-    - src/include/netif/ppp/chap-new.h
-    - src/include/netif/ppp/ppp_impl.h
-    - src/include/netif/ppp/pppdebug.h
-    - src/include/netif/ppp/ipv6cp.h
-    - src/include/netif/ppp/fsm.h
-    - src/include/netif/ppp/polarssl/arc4.h
-    - src/include/netif/ppp/polarssl/sha1.h
-    - src/include/netif/ppp/polarssl/md4.h
-    - src/include/netif/ppp/polarssl/des.h
-    - src/include/netif/ppp/polarssl/md5.h
diff --git a/lwip-to-rtems.py b/lwip-to-rtems.py
index c6776db..acd6922 100755
--- a/lwip-to-rtems.py
+++ b/lwip-to-rtems.py
@@ -28,7 +28,7 @@ from __future__ import print_function
 import os
 import sys
 import getopt
-import yaml
+import json
 from shutil import copyfile
 from pathlib import Path
 
@@ -87,8 +87,7 @@ print("Direction:                   %s" % (("reverse", "forward")[isForward]))
 
 def copyFiles(isforward):
     if (isforward):
-        config_file = open('file-import.yaml', 'r').read()
-        files = yaml.full_load(config_file)
+        files = json.load(open('file-import.json', 'r'))
         src_dir = os.path.abspath(LWIP_UPSTREAM_DIR)
         print("Files Imported:")
         for f in files['files-to-import']:
diff --git a/lwip.py b/lwip.py
index b97d273..e63f4e6 100644
--- a/lwip.py
+++ b/lwip.py
@@ -26,7 +26,7 @@
 #  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 from rtems_waf import rtems
-import yaml
+import json
 import os
 
 xilinx_drv_incl = ''
@@ -66,8 +66,8 @@ def build(bld):
 
     arch_lib_path = rtems.arch_bsp_lib_path(bld.env.RTEMS_VERSION,
                                             bld.env.RTEMS_ARCH_BSP)
-    with open('file-import.yaml', 'r') as cf:
-        files = yaml.full_load(cf.read())
+    with open('file-import.json', 'r') as cf:
+        files = json.load(cf)
         for f in files['files-to-import']:
             if f[-2:] == '.c':
                 source_files.append(os.path.join('./lwip', f))