fixed CMake Error given target "Sync" which does not exist

[ahaladok]

Issue Description

The CMake configuration process fails due to a non-existent target Sync being included in INSTALL_TARGETS when REALM_ENABLE_SYNC=OFF. The target Sync should only be appended to INSTALL_TARGETS if synchronization is enabled.

Repro Steps

1. Configure the build with the following options:

   cmake -B build . \
       -D CMAKE_BUILD_TYPE=Release \
       -D REALM_ENABLE_SYNC=OFF

What Happened?

The build fails with the following error:

CMake Error at src/CMakeLists.txt:159 (install):
  install TARGETS given target "Sync" which does not exist.

The target Sync is being appended to INSTALL_TARGETS unconditionally, without checking if it has been created. When REALM_ENABLE_SYNC=OFF, the Sync target is not defined, causing the error during the installation phase.

Fix Proposal

Update the src/CMakeLists.txt to conditionally append the Sync target only if it has been created. The following changes are required:

set(INSTALL_TARGETS ObjectStore Storage QueryParser)
if (REALM_ENABLE_SYNC)
    list(APPEND INSTALL_TARGETS Sync)
endif()

This ensures that the Sync target is only included when REALM_ENABLE_SYNC=ON, avoiding errors during installation when synchronization is disabled.

Version

• Realm C++ version: 2.2.0
• Installation method: CMake

Atlas Services in Use

• Local Database only

Compiler

• AppleClang 16.0.0.16000026

OS and Version

• Sequoia 15.1

Code Snippets

Relevant code snippet causing the issue:

set(INSTALL_TARGETS ObjectStore Storage QueryParser Sync)

Stacktrace of the Exception/Crash

CMake Error at src/CMakeLists.txt:159 (install):
install TARGETS given target "Sync" which does not exist.

Relevant Log Output

No additional log output provided.