1*f6217f89SApple OSS Distributions# 2*f6217f89SApple OSS Distributions# Subtle combination of files and libraries make up the C++ runtime system for 3*f6217f89SApple OSS Distributions# kernel modules. We are dependant on the KernelModule kmod.make and 4*f6217f89SApple OSS Distributions# CreateKModInfo.perl scripts to be exactly instep with both this library 5*f6217f89SApple OSS Distributions# module and the libkmod module as well. 6*f6217f89SApple OSS Distributions# 7*f6217f89SApple OSS Distributions# If you do any maintenance on any of the following files make sure great 8*f6217f89SApple OSS Distributions# care is taken to keep them in Sync. 9*f6217f89SApple OSS Distributions# extenTools/KernelModule.bproj/kmod.make 10*f6217f89SApple OSS Distributions# extenTools/KernelModule.bproj/CreateKModInfo.perl 11*f6217f89SApple OSS Distributions# IOKitUser/kmodc++/pure.c 12*f6217f89SApple OSS Distributions# IOKitUser/kmodc++/cplus_start.c 13*f6217f89SApple OSS Distributions# IOKitUser/kmodc++/cplus_start.c 14*f6217f89SApple OSS Distributions# IOKitUser/kmodc/c_start.c 15*f6217f89SApple OSS Distributions# IOKitUser/kmodc/c_stop.c 16*f6217f89SApple OSS Distributions# 17*f6217f89SApple OSS Distributions# The trick is that the linkline links all of the developers modules. 18*f6217f89SApple OSS Distributions# If any static constructors are used .constructors_used will be left as 19*f6217f89SApple OSS Distributions# an undefined symbol. This symbol is exported by the cplus_start.c routine 20*f6217f89SApple OSS Distributions# which automatically brings in the appropriate C++ _start routine. However 21*f6217f89SApple OSS Distributions# the actual _start symbol is only required by the kmod_info structure that 22*f6217f89SApple OSS Distributions# is created and initialized by the CreateKModInfo.perl script. If no C++ 23*f6217f89SApple OSS Distributions# was used the _start will be an undefined symbol that is finally satisfied 24*f6217f89SApple OSS Distributions# by the c_start module in the kmod library. 25*f6217f89SApple OSS Distributions# 26*f6217f89SApple OSS Distributions# The linkline must look like this. 27*f6217f89SApple OSS Distributions# *.o -lkmodc++ kmod_info.o -lkmod 28*f6217f89SApple OSS Distributions# 29