Size of produced binaries when compiling llvm & clang sources

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1

Dear llvm developpers,
I followed the tutorial to build llvm and clang provided here:

https://clang.llvm.org/get_started.html

The sources are in sync with subversion repository, and I ended up with more than 30GB of binaries in llvm/bin as shown at the end of this message.

I assume I did something wrong, but I did not find any entry in the doc that helps me understand how to reduce the size of the binaries produced.

Is this normal ? Does any one has some hint to prevent this ?

Here are the sizes of the binaries:

1.9G clang-7
1.6G clang-check
1.2G clang-tidy
1.1G opt
1.1G bugpoint
1.1G llvm-lto
1.1G llvm-lto2
1018M llc
1015M c-index-test
992M dsymutil
992M llvm-isel-fuzzer
989M llvm-opt-fuzzer
987M llvm-dwp
937M llvm-c-test
653M clang-import-test
512M clangd
493M arcmt-test
484M lli
480M clang-query
473M clang-refactor
469M clang-move
468M global-symbol-builder
467M clang-change-namespace
464M tool-template
464M clang-rename
462M clang-reorder-fields
460M find-all-symbols
456M clang-doc
452M clang-include-fixer
444M modularize
443M clang-func-mapping
442M clang-diff
441M libToolingExample00
438M pp-trace
434M diagtool
184M llvm-cfi-verify
170M llvm-objdump
168M sancov
158M llvm-rtdyld
149M llvm-ar
148M llvm-nm
145M llvm-extract
145M llvm-link
142M llvm-dwarfdump
141M llvm-split
131M llvm-mc
127M llvm-pdbutil
126M clang-offload-bundler
122M llvm-mca
121M verify-uselistorder
121M llvm-cat
120M llvm-as
117M llvm-special-case-list-fuzzer
117M llvm-demangle-fuzzer
116M llvm-modextract
114M obj2yaml
112M llvm-xray
105M sanstats
105M llvm-symbolizer
96M llvm-readobj
93M llvm-cov
90M lli-child-target
86M llvm-cxxdump
85M llvm-objcopy
83M llvm-cvtres
82M llvm-size
76M clang-apply-replacements
75M clang-format
64M llvm-diff
59M llvm-dis
53M llvm-stress
50M llvm-tblgen
48M llvm-profdata
31M yaml2obj
17M clang-tblgen

  • regards,

Manuel

2

Dear llvm developpers,
I followed the tutorial to build llvm and clang provided here:
Clang - Getting Started

The sources are in sync with subversion repository, and I ended up with more
than 30GB of binaries in llvm/bin as shown at the end of this message.

You probably built the debug version, with debug info.
If you do not want that, you could either specify `-DCMAKE_BUILD_TYPE=Release`,
or modify/pass `CFLAGS`/`CXXFLAGS` so that no debuginfo is generated.

3

Better yet, build with -DLLVM_USE_SPLIT_DWARF=ON -DLLVM_BUILD_LLVM_DYLIB=ON.

4

Thanks a lot Roman,

It worked, it reduces the size of the binaries by 30.
It took me a bit of time to get back because I updated the code to the last version and it stopped compiling due to an error and I only compile llvm/clang at night.

  • all the best,