Honour dpkg-architecture's DEB_HOST_GNU_TYPE, to fix cross-building.

[chiark-tcl.git] / Makefile

diff --git a/Makefile b/Makefile
index 56ae963c435ec04076ead3c30c0cc25397c3142c..74fc544ad13fa7a8feb90bf7288f6ff5b7803427 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,13 @@
 
 SUBDIRS=       base adns hbytes cdb crypto dgram
-# tuntap
+
+ifneq ($(wildcard /usr/include/linux/if_tun.h),)
+SUBDIRS+=      tuntap
+endif
+
+ifneq ($(wildcard /usr/include/wiringPi.h /usr/include/arm-*/wiringPi.h),)
+SUBDIRS+=      wiringpi
+endif
 
 default: all
 
@@ -9,19 +16,7 @@ clean all:
 
 # To find undefined symbols when implementing, for example:
 #
-# liberator:cdb> ld /usr/bin/tclsh8.3 ../base/chiark-tcl.so ../hbytes/chiark_tcl_hbytes.so ../cdb/chiark_tcl_cdb.so -ltcl8.3
-# ld: warning: cannot find entry symbol _start; defaulting to 00000000080486ac
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_delete'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_lookup_hb'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_open_okjunk'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdb_lookup_hb'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_lookup'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdb_close'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdb_lookup'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbtoplevel_cdb'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_update_hb'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdb_open'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbwr_update'
-# ../cdb/chiark_tcl_cdb.so: undefined reference to `cht_do_cdbtoplevel_cdb_wr'
-# Segmentation fault
-# liberator:cdb>
+# liberator:chiark-tcl> LD_LIBRARY_PATH=:adns:base:cdb:crypto:dgram:hbytes:tuntap tclsh8.3
+# % load chiark_tcl_tuntap-1.so
+# couldn't load file "chiark_tcl_tuntap-1.so": tuntap/chiark_tcl_tuntap-1.so: undefined symbol: cht_tunsocket_entries
+# %