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[doc] Use cmake's -S option to simplify the build instructions 

Now that llvm's minimum version is 3.13.4 anyway and `-S` is
introduced in the same version[1], let's use this little
time saving option to simplify the build instructions.

[1]: https://cgold.readthedocs.io/en/latest/glossary/-S.html

Authored-By: Ebrahim Byagowi <ebrahim@gnu.org>

Differential-Revision: https://reviews.llvm.org/D95049
This commit is contained in:
Ebrahim Byagowi 2021-02-16 14:36:56 -06:00 committed by Evandro Menezes
parent b86dbe0c23
commit 8eda10ca09
1 changed files with 2 additions and 6 deletions
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@ -50,11 +50,7 @@ This is an example work-flow and configuration to get and build the LLVM source:
* ``cd llvm-project``
* ``mkdir build``
* ``cd build``
* ``cmake -G <generator> [options] ../llvm``
* ``cmake -S llvm -B build -G <generator> [options]``
Some common build system generators are:
@ -85,7 +81,7 @@ This is an example work-flow and configuration to get and build the LLVM source:
* ``-DLLVM_ENABLE_ASSERTIONS=On`` --- Compile with assertion checks enabled
(default is Yes for Debug builds, No for all other build types).
* ``cmake --build . [-- [options] <target>]`` or your build system specified above
* ``cmake --build build [-- [options] <target>]`` or your build system specified above
directly.
* The default target (i.e. ``ninja`` or ``make``) will build all of LLVM.