llvm dev - Mar 2019 - Generating object files more efficiently

Currently I compile my C code in 2 steps in order to generate .o files

clang -emit-llvm -c foo.c -o foo.bc
llc -march=XYZ foo.bc -filetype=obj

Is there a way to generate either .o or .elf files in just 1 command?

Thanks.

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I would have guessed:

object:
clang -c foo.c -o foo.o -march=XYZ

shared library:
clang -shared foo.c -o foo.so -march=XYZ

executable:
clang foo.c -o foo -march=XYZ


On 03/23, J S via llvm-dev wrote:
> Currently I compile my C code in 2 steps in order to generate .o files
> 
> clang -emit-llvm -c foo.c -o foo.bc
> llc -march=XYZ foo.bc -filetype=obj
> 
> Is there a way to generate either .o or .elf files in just 1 command?
> 
> Thanks.
> 
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

-- 

Johannes Doerfert
Researcher

Argonne National Laboratory
Lemont, IL 60439, USA

jdoerfert at anl.gov
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Johannes,


I tried the last one and it gave me this:


error: unknown target CPU 'XYZ'
note: valid target CPU values are: nocona, core2, penryn, bonnell, atom,
      silvermont, slm, goldmont, goldmont-plus, tremont, nehalem, corei7,
      westmere, sandybridge, corei7-avx, ivybridge, core-avx-i, haswell,
      core-avx2, broadwell, skylake, skylake-avx512, skx, cascadelake,
      cannonlake, icelake-client, icelake-server, knl, knm, k8, athlon64,
      athlon-fx, opteron, k8-sse3, athlon64-sse3, opteron-sse3, amdfam10,
      barcelona, btver1, btver2, bdver1, bdver2, bdver3, bdver4, znver1, znver2,
      x86-64


________________________________
From: Doerfert, Johannes <jdoerfert at anl.gov>
Sent: Saturday, March 23, 2019 1:15 PM
To: J S
Cc: via llvm-dev
Subject: Re: [llvm-dev] Generating object files more efficiently

I would have guessed:

object:
clang -c foo.c -o foo.o -march=XYZ

shared library:
clang -shared foo.c -o foo.so -march=XYZ

executable:
clang foo.c -o foo -march=XYZ


On 03/23, J S via llvm-dev wrote:
> Currently I compile my C code in 2 steps in order to generate .o files
>
> clang -emit-llvm -c foo.c -o foo.bc
> llc -march=XYZ foo.bc -filetype=obj
>
> Is there a way to generate either .o or .elf files in just 1 command?
>
> Thanks.
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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--

Johannes Doerfert
Researcher

Argonne National Laboratory
Lemont, IL 60439, USA

jdoerfert at anl.gov
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