File CMakeLists.txt of Package failed_rem

```cmake
cmake_minimum_required(VERSION 3.5)

# Define the project and specify only C language
project(rem LANGUAGES C)

# Find dependencies
find_package(RE REQUIRED)

# Add executable or library
add_executable(rem main.c)

# Link libraries
target_link_libraries(rem PRIVATE RE)
```

#### Summary of Changes
1. Added `gcc-c++` to the `BuildRequires` section in `rem.spec`.
2. Optionally modified `CMakeLists.txt` to disable C++ if not required.

These changes ensure that the build environment has the necessary tools and configurations to successfully compile the package. If additional issues arise, please provide further logs or details for analysis.