TODO: Upstream the LLVM includedir parts.
NOTE: The add_languages part is commented out as it interferes with
      which LLVM we choose in the ebuild. Might be:
      https://github.com/mesonbuild/meson/issues/13906.
--- a/libcextract/meson.build
+++ b/libcextract/meson.build
@@ -37,4 +37,4 @@ libcextract_sources = [
   'ASTUnitHack.cpp'
 ]
 
-libcextract_static = static_library('cextract', libcextract_sources)
+libcextract_static = static_library('cextract', libcextract_sources, include_directories: llvm_incdir)
--- a/meson.build
+++ b/meson.build
@@ -61,11 +61,16 @@ foreach line : gcc_output
 endforeach
 
 # Check if we got the gcc installation dir and add it to the project arguments.
-assert(gcc_install_dir != '', 'GCC headers dir not found. Check \'gcc -v\'')
-add_project_arguments('--gcc-install-dir=' + gcc_install_dir, language: 'cpp')
+#assert(gcc_install_dir != '', 'GCC headers dir not found. Check \'gcc -v\'')
+#add_project_arguments('--gcc-install-dir=' + gcc_install_dir, language: 'cpp')
 
 ########## Dependency: clang libraries ################
-llvm_libdir = dependency('llvm', version : '>=16').get_variable(cmake : 'LLVM_LIBRARY_DIR', configtool: 'libdir')
+# This is needed to lookup LLVM via CMake, per a Meson warning.
+#add_languages('c', native : false)
+llvm_dep = dependency('llvm', version : '>=16')
+llvm_bindir = llvm_dep.get_variable(cmake : 'LLVM_BINARY_DIR', configtool : 'bindir')
+llvm_incdir = llvm_dep.get_variable(cmake : 'LLVM_MAIN_INCLUDE_DIR', configtool : 'includedir')
+llvm_libdir = llvm_dep.get_variable(cmake : 'LLVM_LIBRARY_DIR', configtool : 'libdir')
 
 clang_dep = []
 clang_dep += cpp.find_library('clang-cpp', dirs : llvm_libdir)
@@ -80,15 +85,17 @@ subdir('libcextract')
 incdir = include_directories('libcextract')
 
 executable('ce-inline', 'Inline.cpp',
-  include_directories : incdir,
+  include_directories : [llvm_incdir, incdir],
   install : true,
+  install_dir : llvm_bindir,
   link_with : libcextract_static,
   dependencies : [elf_dep, zlib_dep, zstd_dep]
 )
 
 executable('clang-extract', 'Main.cpp',
-  include_directories : incdir,
+  include_directories : [llvm_incdir, incdir],
   install : true,
+  install_dir : llvm_bindir,
   link_with : libcextract_static,
   dependencies : [elf_dep, clang_dep, zlib_dep, zstd_dep]
 )