[llvm-dev] LLVM fails to install with ocaml enabled
Alen Skondro via llvm-dev
I'm playing around with LLVM and stumbled upon this issue while while
performing "make install". The build itself was successful. I'm using
the latest git version.
#make install
-- Installing: /home/alesko/llvm-install/bin/llvm-mc
-- Installing: /home/alesko/llvm-install/bin/sancov
-- Installing: /home/alesko/llvm-install/bin/opt
-- Installing: /home/alesko/llvm-install/bin/llvm-split
-- Installing: /home/alesko/llvm-install/bin/llvm-cov
-- Installing: /home/alesko/llvm-install/bin/obj2yaml
CMake Error at docs/cmake_install.cmake:36 (file):
file INSTALL cannot find
"/home/alesko/repositories/build-llvm/docs/ocamldoc/html".
Call Stack (most recent call first):
cmake_install.cmake:66 (include)
Makefile:93: recipe for target 'install' failed
make: *** [install] Error 1
Without ocaml, install works fine.
What am I missing?
regards,
Alen
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Chris Bieneman via llvm-dev
The fix for this will probably involve changing the add_custom_target command at docs/CMakeLists.txt:146 to be split out into several add_custom_command calls that have output files, and making the target depend on the output files.
-Chris
Alex Wang via llvm-dev
> On Dec 9, 2015, at 1:56 PM, Chris Bieneman via llvm-dev <llvm...@lists.llvm.org> wrote:
>
> Not sure, but my guess is that the ocaml documents targets aren’t being included in the ALL target, which is resulting in them not being built before the install action.
I think you're right. Running "make ocaml_doc" then rerunning "make install" completed the build.
>
> The fix for this will probably involve changing the add_custom_target command at docs/CMakeLists.txt:146 to be split out into several add_custom_command calls that have output files, and making the target depend on the output files.
Adding "ALL" to that add_custom_command let a general "make && make install" build finish. Is that a viable fix, or would it have some other effects I'm not aware of?
-Alex
Chris Bieneman via llvm-dev
The only side-effect of that is that because the add_custom_target isn’t a custom_command with properly mapped outputs it will always re-run, so “make && make” and “make && make install” will both build the docs twice. Not sure if anyone really cares about that.
The better solution would probably be to do one or more add_custom_commands that had output files that could be timestamp compared against the inputs, but that may be more work than it is worth here.
-Chris