LLVM-CONFIG(1)

🌸 NAME 🌸

llvm-config — print LLVM compilation options. Bestie, welcome to the LLVM-CONFIG(1) page from the LLVM manual; this tool is lowkey the build-info queen. 💅

✨ SYNOPSIS ✨

llvm-config option [components...]

💖 DESCRIPTION 💖

llvm-config makes it easier to build applications that use LLVM. It can print the compiler flags, linker flags and object libraries needed to link against LLVM. It’s giving “personal assistant for your build system,” no cap. 🫶

🫶 EXAMPLES 🫶

Wanna link against the JIT? Periodt, here’s the vibe:

g++ `llvm-config --cxxflags` -o HowToUseJIT.o -c HowToUseJIT.cpp
g++ `llvm-config --ldflags` -o HowToUseJIT HowToUseJIT.o \
    `llvm-config --libs engine bcreader scalaropts`

👑 OPTIONS 👑

• --assertion-mode — prints the assertion mode used when LLVM was built (ON or OFF). A literal vibe check for assertions. ✨
• --bindir — prints the installation directory for LLVM binaries.
• --build-mode — prints the build mode used when LLVM was built (e.g. Debug or Release).
• --build-system — prints the build system used to build LLVM (e.g. cmake or gn).
• --cflags — prints the C compiler flags needed to use LLVM headers.
• --cmakedir — prints the installation directory for LLVM CMake modules.
• --components — prints all valid component names. It’s the full menu, bestie. 🍓
• --cppflags — prints the C preprocessor flags needed to use LLVM headers.
• --cxxflags — prints the C++ compiler flags needed to use LLVM headers.
• --has-rtti — prints whether or not LLVM was built with rtti (YES or NO).
• --help — prints a summary of llvm-config arguments. When in doubt, ask for help, queen. 👑
• --host-target — prints the target triple used to configure LLVM.
• --ignore-libllvm — ignore libLLVM and link component libraries instead.
• --includedir — prints the installation directory for LLVM headers.
• --ldflags — prints the flags needed to link against LLVM libraries.
• --libdir — prints the installation directory for LLVM libraries.
• --libfiles — similar to --libs, but prints the full path to each library file. This is useful when creating makefile dependencies, to ensure that a tool is relinked if any library it uses changes. Very “keep it fresh” of it. 🔥
• --libnames — similar to --libs, but prints the bare filenames of the libraries without -l or pathnames. Useful for linking against a not-yet-installed copy of LLVM.
• --libs — prints all the libraries needed to link against the specified LLVM components, including any dependencies.
• --link-shared — link the components as shared libraries.
• --link-static — link the component libraries statically.
• --obj-root — prints the object root used to build LLVM.
• --prefix — prints the installation prefix for LLVM.
• --shared-mode — prints how the provided components can be collectively linked (shared or static).
• --system-libs — prints all the system libraries needed to link against the specified LLVM components, including any dependencies.
• --targets-built — prints the component names for all targets supported by this copy of LLVM.
• --version — prints the version number of LLVM.

🧚 COMPONENTS 🧚

To print a list of all available components, run llvm-config --components. In most cases, components correspond directly to LLVM libraries. Useful “virtual” components include:

• all — includes all LLVM libraries. The default if no components are specified.
• backend — includes either a native backend or the C backend.
• engine — includes either a native JIT or the bitcode interpreter.

🌈 EXIT STATUS 🌈

If llvm-config succeeds, it will exit with 0. Otherwise, if an error occurs, it will exit with a non-zero value. So 0 is the slay, and non-zero is the “something’s off, bestie” moment. 😭

💜 Author 💜

Maintained by the LLVM Team (https://llvm.org/). They’re the main characters behind this whole thing. 👑

🎀 Copyright 🎀

2003-2026, LLVM Project — iconic run, honestly. 🎀

Cute sign-off: this page is from LLVM 15, dated 2026-09-09, and it’s the LLVM-CONFIG(1) manual. Byeee 💅