lldb-server not generated during clang;lldb build

[thompsonbry]

After building lldb, when I try to run I get

(lldb) r
error: unable to locate lldb-server

My build was as follows. Providing all the details for context.

OS is 5.4.223-137.414.amzn2int.x86_64

#################
### lldb install
#################
#
### CMake 3.13.4 or higher is required.
# See https://cmake.org/download/ and https://cmake.org/install/
mkdir ~/cmake
cd ~/cmake
wget https://github.com/Kitware/CMake/releases/download/v3.25.1/cmake-3.25.1.tar.gz
tar xfz cmake-3.25.1.tar.gz
cd cmake-3.25.1.tar.gz
./bootstrap
make -j 48 # use #cores for your machine (parallel build)
sudo make install
#
### Install ninja (I built from source as git clone was not working)
mkdir ~/ninja
cd ~/ninja
wget https://github.com/ninja-build/ninja/archive/refs/tags/v1.11.1.tar.gz
tar xfz https://github.com/ninja-build/ninja/archive/refs/tags/v1.11.1.tar.gz
cd ninja-1.11.1
cmake -Bbuild-cmake && cmake --build build-cmake
cat README.md
cd build-cmake
sudo make install
### Install libraries that will enable additional lldb features
sudo yum install libedit-devel libxml2-devel ncurses-devel python-devel swig
### Install lldb
# See https://lldb.llvm.org/resources/build.html
mkdir ~/llvm
cd ~/llvm
git clone https://github.com/llvm/llvm-project.git
# Find a current release
cd llvm-project
git tag -l
git checkout llvmorg-15.0.6
cd ..
cmake -G Ninja -DLLVM_ENABLE_PROJECTS="clang;lldb" -DCMAKE_BUILD_TYPE=Release llvm-project/llvm
ninja lldb

find does not discover any generated binary for the lldb-server

find . -name '*lldb-server*'
./llvm-project/llvm/utils/gn/secondary/lldb/tools/lldb-server
./llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server
./llvm-project/lldb/docs/man/lldb-server.rst
./llvm-project/lldb/test/API/tools/lldb-server
./llvm-project/lldb/test/Shell/lldb-server
./llvm-project/lldb/unittests/tools/lldb-server
./llvm-project/lldb/tools/lldb-server
./llvm-project/lldb/tools/lldb-server/lldb-server.cpp
./llvm-project/lldb/tools/lldb-server/Darwin/resources/lldb-server-entitlements.plist
./llvm-project/lldb/tools/lldb-server/Darwin/resources/lldb-server-macos-entitlements.plist
./llvm-project/lldb/tools/lldb-server/Darwin/resources/lldb-server-Info.plist
./llvm-project/lldb/tools/lldb-server/Darwin/resources/lldb-server-mig.defs
./tools/lldb/unittests/tools/lldb-server
./tools/lldb/tools/lldb-server
./tools/lldb/tools/lldb-server/CMakeFiles/lldb-server.dir

This is my first time trying to build lldb. The build appeared to complete normally.

Thanks in advance.
Bryan

[llvmbot]

@llvm/issue-subscribers-lldb

[DavidSpickett]

This is because the target lldb is just lldb the client side, lldb-server is the target for the server. I'm guessing most people are just doing ninja which means they get both.

But you're right, the instructions do ninja lldb and that is misleading.

It might be because on MacOS you won't have lldb-server you'll have debugserver, so ninja lldb lldb-server wouldn't work there (?) and we tried to have instructions that would be generic. We should note the need for lldb-server is needed for non MacOS platforms.

(and debugserver itself may be a separate target too)

[thompsonbry]

Replacing

ninja lldb

with

ninja

Worked.

Thanks,
Bryan

[DavidSpickett]

https://reviews.llvm.org/D140385 to update the docs.