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Describe the bug
On Linux a default build will fail because CMake selects GCC instead of Clang

To Reproduce
Steps to reproduce the behavior:

1. On linux, where both GCC and Clang are installed, run ./build.sh release

Expected behavior
When clang is available, Filament should be built.

Screenshots
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Logs
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$ ./build.sh release
Building release in out/cmake-release...
-- The C compiler identification is GNU 14.2.0
-- The CXX compiler identification is GNU 14.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at CMakeLists.txt:286 (message):
  Detected C compiler GNU is unsupported


-- Configuring incomplete, errors occurred!

Desktop (please complete the following information):

• OS: Linux
• GPU: n/a
• Backend: n/a

Smartphone (please complete the following information):

• Device: n/a
• OS: n/a

Additional context
Add any other context about the problem here.