[llvm-dev] Building LLVM Pass with in Source Tree
Jonathan Roelofs via llvm-dev
llvm-dev at lists.llvm.org
Thu Oct 22 13:54:38 PDT 2015
On 10/22/15 2:19 PM, vivek pandya via llvm-dev wrote:
> Hello ,
> I am following http://llvm.org/docs/WritingAnLLVMPass.html this to build
> a simple pass with in the source tree.
There's two meanings of "in source" here. One of them is "your new pass
lives alongside all the other passes in the source directory", and the
other is "your build directory is your source directory, i.e.
`./configure` not `../llvm/configure`)". The latter is specifically
forbidden by the message you encountered. The former is encouraged, but
not required (and there are instructions on how to build "out of source"
passes in there somewhere too).
> When I try to run make command on my pass directory. I am getting
> following error:
Make needs to be run from the top level of the _build_ directory, not
from one of the subdirs of the _source_ directory.
> ../../../Makefile.common:60: ../../../Makefile.config: No such file or
> ../../../Makefile.common:68: /Makefile.rules: No such file or directory
> make: *** No rule to make target `/Makefile.rules'. Stop.
> But I think this common as I have not run ./configure on my source tree.
> When I try to run ./configure on my LLVM source tree I am getting
> following error:
> configure: error: In-source builds are not allowed. Please configure
> from a separate build directory!
> Now I build LLVM with separate source directory and put my pass
> directory inside of my build tree. Then I run make it builds
Your pass directory should go somewhere in the source dir, not the build
> successfully. opt is able to load my pass correctly.
> But here my question is " *Is this a correct way to build the pass ?*"
> and if In-source builds are not allowed then
> http://llvm.org/docs/WritingAnLLVMPass.html needs to be updated.
Can you point me to the specific instructions there that confused you?
> Please guide !
> *Vivek Pandya*
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
jonathan at codesourcery.com
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