llvm 8 install size

Question

I recently compiled llvm from source since I wanted to look at 8. However, it is a whooping 56G in size once installed. That seems excessive.

How can I reduce the size of the installation?

; du -h -d 1 -c .
41M     ./include
22G     ./lib
35G     ./bin
264K    ./share
28K     ./libexec
56G     .
56G     total

Build using:

cmake3 -G Ninja  -DCMAKE_INSTALL_PREFIX=~/llvm -DLLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN=1 -DLLVM_ENABLE_PROJECTS="all" ../llvm

You never mention how you configured the project and how you built it. I'm assuming you built it with debugging symbols. My clang-8 binary (on OpenBSD) is 36.8 MB. — Kusalananda
– Kusalananda ♦, Commented Aug 12, 2019 at 10:05
@Kusalananda I build it following the instructions on the web site — Sardathrion - against SE abuse
– Sardathrion - against SE abuse, Commented Aug 12, 2019 at 10:13
But you never read llvm.org/docs/CMake.html#frequently-used-cmake-variables and did not use CMAKE_BUILD_TYPE:Release? — Kusalananda
– Kusalananda ♦, Commented Aug 12, 2019 at 10:26
@Kusalananda I foolishly assumed that debug was not the default. /sigh. — Sardathrion - against SE abuse
– Sardathrion - against SE abuse, Commented Aug 12, 2019 at 10:31

Kusalananda · Accepted Answer · 2019-08-12 11:02:41Z

1

Build LLVM in release mode by adding -DCMAKE_BUILD_TYPE=Release to cmake3 invocation.

The default is to build with debugging symbols, which will result in very large files.

Kusalananda♦

356k42 gold badges735 silver badges1.1k bronze badges

answered Aug 12, 2019 at 10:26

arrowd

8676 silver badges12 bronze badges

1 Answer 1