1*699cd480SApple OSS Distributions# 2*699cd480SApple OSS Distributions# Subtle combination of files and libraries make up the C++ runtime system for 3*699cd480SApple OSS Distributions# kernel modules. We are dependant on the KernelModule kmod.make and 4*699cd480SApple OSS Distributions# CreateKModInfo.perl scripts to be exactly instep with both this library 5*699cd480SApple OSS Distributions# module and the libkmod module as well. 6*699cd480SApple OSS Distributions# 7*699cd480SApple OSS Distributions# If you do any maintenance on any of the following files make sure great 8*699cd480SApple OSS Distributions# care is taken to keep them in Sync. 9*699cd480SApple OSS Distributions# extenTools/KernelModule.bproj/kmod.make 10*699cd480SApple OSS Distributions# extenTools/KernelModule.bproj/CreateKModInfo.perl 11*699cd480SApple OSS Distributions# IOKitUser/kmodc++/pure.c 12*699cd480SApple OSS Distributions# IOKitUser/kmodc++/cplus_start.c 13*699cd480SApple OSS Distributions# IOKitUser/kmodc++/cplus_start.c 14*699cd480SApple OSS Distributions# IOKitUser/kmodc/c_start.c 15*699cd480SApple OSS Distributions# IOKitUser/kmodc/c_stop.c 16*699cd480SApple OSS Distributions# 17*699cd480SApple OSS Distributions# The trick is that the linkline links all of the developers modules. 18*699cd480SApple OSS Distributions# If any static constructors are used .constructors_used will be left as 19*699cd480SApple OSS Distributions# an undefined symbol. This symbol is exported by the cplus_start.c routine 20*699cd480SApple OSS Distributions# which automatically brings in the appropriate C++ _start routine. However 21*699cd480SApple OSS Distributions# the actual _start symbol is only required by the kmod_info structure that 22*699cd480SApple OSS Distributions# is created and initialized by the CreateKModInfo.perl script. If no C++ 23*699cd480SApple OSS Distributions# was used the _start will be an undefined symbol that is finally satisfied 24*699cd480SApple OSS Distributions# by the c_start module in the kmod library. 25*699cd480SApple OSS Distributions# 26*699cd480SApple OSS Distributions# The linkline must look like this. 27*699cd480SApple OSS Distributions# *.o -lkmodc++ kmod_info.o -lkmod 28*699cd480SApple OSS Distributions# 29