Packages with the clang use flag

app-doc / doxygen : Documentation system for most programming languages

  • support for sys-devel/clang assisted parsing

app-vim / youcompleteme : vim plugin: a code-completion engine for Vim

  • Enable semantic support for C-family languages using sys-devel/clang

dev-lang / moarvm : A 6model-based VM for NQP and Rakudo Perl 6

  • Use clang compiler instead of GCC

dev-lang / nqp : Not Quite Perl, a Perl 6 bootstrapping compiler

  • Toggle usage of the clang compiler in conjunction with MoarVM

dev-lang / rakudo : A compiler for the Perl 6 programming language

  • Use Clang to compile the MoarVM backend

dev-qt / qt-creator : Lightweight IDE for C++/QML development centering around Qt

  • Build clang-based plugins (code model, formatting, refactoring, static analysis)

dev-util / edi : An EFL-based IDE

  • Provide integration with sys-devel/clang for autocompletion and inline errors

dev-util / gnome-builder : An IDE for writing GNOME-based software

  • Provide integration with sys-devel/clang for best possible C/C++ autocompletion, semantic highlighting, symbol resolving, and diagnostics support

dev-util / perf : Userland tools for Linux Performance Counters

  • Enable builtin clang and LLVM support

mail-client / thunderbird : Thunderbird Mail Client

  • Use Clang compiler instead of GCC

sys-libs / compiler-rt : Compiler runtime library for clang (built-in part)

  • Force building using installed clang (rather than the default CC/CXX).

sys-libs / compiler-rt-sanitizers : Compiler runtime libraries for clang (sanitizers & xray)

  • Force building using installed clang (rather than the default CC/CXX).

www-client / firefox : Firefox Web Browser

  • Use Clang compiler instead of GCC