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I have two question

  1. I have done some changes in C-backend of LLVM-2.9 source code. Now what I wanna is how can I reflect these changes in build folder?

  2. What does make update do ? When I run this command this is what happen in my terminal.

    arpit@arpit-HP-dx2480-MT-KL969AV:~/llvm1/build$ sudo make update
svn  update /home/arpit/llvm1/llvm
Skipped '/home/arpit/llvm1/llvm'
svn: warning: '/home/arpit/llvm1/llvm' is not a working copy
Skipped '.'
Arpit Sancheti
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  • 1. Make check what has changed and redoes anything that depends on it. It's the reason for it's existence. So just re-run `make` exactly as when you've initially built it. – Jan Hudec Oct 31 '13 at 07:56
  • 2. Apparently runs `svn update`. Since you didn't check out from subversion, it is of no use to you (I suppose it runs svn update across all the modules that are checked out from separate repositories). – Jan Hudec Oct 31 '13 at 07:58
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    3. Version 2.9 is _ancient_. Shouldn't you be working on current version (3.3 or even development version). – Jan Hudec Oct 31 '13 at 07:59
  • @JanHudec I rerun `make` command as you said but the change was not reflected – Arpit Sancheti Oct 31 '13 at 09:31

1 Answers1

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make update updates LLVM and Clang and other sub-projects, so it's not what you need. What you do need is just make in the build folder. If any of the source files changed, make is supposed to pick it up and re-build the relevant files.

Maybe the specific changes you made are not picked up by make, have you added a new file? You can always try to build everything anew (e.g. make -B) and see if the change is included.

Eli Bendersky
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