arm ios doesn't have elf.h, sys/procfs.h, need to avoid including them on apple systems

[jasonmolenda]

Summary

I'm getting lldb to build for ios again and had build failures with NativeRegisterContextLinux_arm.cpp and Linux/Procfs.h which assume they're building for linux when being built or aarch64/etc.

Would some patch like this be acceptable? It's not pretty, but that's always the way with the C preprocessor as we pile on conditionals. :)

[labath]

The actual changes aren't too bad, but I wonder why you need to add them at all. These files all assume they will be running on a linux host (they are a part of lldb-server), and they will not do anything useful even if you can get them to compile. I am not sure what is the state of the xcode build, but in cmake we don't even compile the whole folder on other platforms (see source/Plugins/Process/CMakeLists.txt). I wonder if you should do the same for your build system (?)

[jasonmolenda]

Good point. Let me play with the xcode project file (which I was using to do the build) tomorrow; your solution may be the correct one, we might have some files being built unnecessarily.

[jasonmolenda]

Yes, taking the source/Plugins/Process/Linux directory out of the xcodeproject file altogether makes this build on ios, I'll go with that approach.

source/Plugins/Process/Linux/NativeRegisterContextLinux_arm.cpp

 //
 //===----------------------------------------------------------------------===//
 
-#if defined(__arm__) || defined(__arm64__) || defined(__aarch64__)
+#if !defined (__APPLE__) && (defined(__arm__) || defined(__arm64__) || defined(__aarch64__))
 
 #include "NativeRegisterContextLinux_arm.h"
 

source/Plugins/Process/Linux/Procfs.h

 #endif // NT_FPREGSET
 #endif
 #else  // __ANDROID__
+#if !defined (__APPLE__)
 #include <sys/procfs.h>
+#endif // __APPLE__
 #endif // __ANDROID__