llvm dev - May 2016 - clang dependency generation (-Mxx) with -emit-llvm

Hi All,

I'm attempting to use the above-mentioned flags together but I cannot
figure out a combination of flags that will get clang to emit the
dependency file if the emit-llvm flag is also on. I've seen examples in the
forums of people doing this, so it seems like it should work, but there
must be some small mistake I'm making.

clang++ -O2 -o build/network.ll network.cxx -std=c++11 -S -emit-llvm
-target my_target -I /depot/include -I build -v -MMD -MP -MF build/
network.ll.dep.mk -MT build/network.ll

I've tried a number of variations on the compiler -M flags to no avail. We
do have a custom target my_target that really only adds a few additional
defines into the environment. Do we need to specify something in our target
to allow dependency generation?

Thanks!
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This question is probably better addressed to the Clang mailing list.
Moving llvm-dev to BCC so replies move to cfe-dev.

On Tue, May 17, 2016 at 9:21 AM Dustyn Blasig via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi All,
>
> I'm attempting to use the above-mentioned flags together but I cannot
> figure out a combination of flags that will get clang to emit the
> dependency file if the emit-llvm flag is also on. I've seen examples in
the
> forums of people doing this, so it seems like it should work, but there
> must be some small mistake I'm making.
>
> clang++ -O2 -o build/network.ll network.cxx -std=c++11 -S -emit-llvm
> -target my_target -I /depot/include -I build -v -MMD -MP -MF build/
> network.ll.dep.mk -MT build/network.ll
>
> I've tried a number of variations on the compiler -M flags to no avail.
We
> do have a custom target my_target that really only adds a few additional
> defines into the environment. Do we need to specify something in our target
> to allow dependency generation?
>
> Thanks!
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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