Allow for using LLVM from Homebrew and include its libc++

This commit is contained in:
Nadia Holmquist Pedersen 2021-07-23 06:31:20 +02:00
parent 66a58f7478
commit f21ae77a01
3 changed files with 22 additions and 3 deletions

View File

@ -123,8 +123,10 @@ if (ENABLE_LTO)
if (NOT LLD STREQUAL "LLD-NOTFOUND")
add_link_options(-fuse-ld=lld)
endif()
set(CMAKE_AR "llvm-ar")
set(CMAKE_RANLIB "llvm-ranlib")
if (NOT APPLE)
set(CMAKE_AR "llvm-ar")
set(CMAKE_RANLIB "llvm-ranlib")
endif()
endif()
endif()

View File

@ -0,0 +1,12 @@
# Toolchain file for building with Homebrew's LLVM on macOS
# This is useful on 10.14 where std::filesystem is not supported.
set(CMAKE_C_COMPILER /usr/local/opt/llvm/bin/clang)
set(CMAKE_CXX_COMPILER /usr/local/opt/llvm/bin/clang++)
add_link_options(-L/usr/local/opt/llvm/lib)
# LLVM in Homebrew is built with latest Xcode which has a newer linker than
# what is bundled in the default install of Xcode Command Line Tools, so we
# override it to prevent it passing flags not supported by the system's ld.
add_link_options(-mlinker-version=450)

View File

@ -56,6 +56,10 @@ def expand_load_path(lib, path)
file = $fallback_rpaths
.map { |it| File.join(it, file_name) }
.find { |it| File.exist? it }
if file == nil
path = File.join(File.dirname(lib), file_name)
file = path if File.exist? path
end
return file, :rpath if file
when "executable_path"
file = File.join(File.dirname(executable), file_name)
@ -85,7 +89,6 @@ def install_name_tool(exec, action, path1, path2 = nil)
args = ["-#{action.to_s}", path1]
args << path2 if path2 != nil
FileUtils.chmod("u+w", exec)
out, status = Open3.capture2e("install_name_tool", *args, exec)
if status != 0
puts out
@ -129,6 +132,7 @@ def fixup_libs(prog, orig_path)
next if File.exist? File.join(frameworks_dir, fwname)
expath, _ = expand_load_path(orig_path, framework)
FileUtils.cp_r(expath, frameworks_dir, preserve: true)
FileUtils.chmod_R("u+w", File.join(frameworks_dir, fwname))
fixup_libs File.join(frameworks_dir, fwname, fwlib), libpath
else
libname = File.basename(libpath)
@ -141,6 +145,7 @@ def fixup_libs(prog, orig_path)
next if File.exist? dest
expath, _ = expand_load_path(orig_path, libpath)
FileUtils.copy expath, frameworks_dir
FileUtils.chmod("u+w", dest)
fixup_libs dest, libpath
end
end