[llvm-dev] Building LLVM Pass with in Source Tree
Jonathan Roelofs via llvm-dev
llvm-dev at lists.llvm.org
Fri Oct 23 10:50:03 PDT 2015
On 10/22/15 11:00 PM, vivek pandya wrote:
> On Fri, Oct 23, 2015 at 2:24 AM, Jonathan Roelofs
> <jonathan at codesourcery.com <mailto:jonathan at codesourcery.com>> wrote:
> 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.
> This is contradicting to compile the file with a simple “gmake”
> command in the local directory and you should get a new file
> “Debug+Asserts/lib/Hello.so” as given in tutorial
I've fixed this part of the docs in r251127. If you see any other
references to in-source builds in the docs, please let me know.
> running *../llvm/configure* followed by *make* on build directory
> will build the whole llvm again right ?
Yes. Though once you've added the new folder & makefile, and configured,
there shouldn't be a need to configure again. Running gmake from the top
level of your build directory should re-build only the parts that need it.
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded
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