pantry/projects/tea.xyz/gx/cc/cc.rb
2023-06-12 14:49:52 -04:00

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#!/usr/bin/ruby
# - we inject our rpath to ensure our libs our found
# - for bottles we replace that in fix-machos.rb with a relocatable prefix
# - in general usage we dont, so if the user needs to distribute their artifacts,
# they will need to fix them first, but that's typical anyway.
# - for tea-envs the user probably wont use tea.xyz/gx/cc even though they *should*
# and thus we set LDFLAGS in the hope that they will be picked up and the rpath set
$tea_prefix = ENV['TEA_PREFIX'] || `tea --prefix`.chomp
exe = File.basename($0)
# remove duplicates since this in fact embeds the rpath multiple times
# and omit -nodefaultrpaths since it is not a valid flag for clang
args = ARGV.map do |arg|
arg unless arg == "-Wl,-rpath,#$tea_prefix" or arg == "-nodefaultrpaths"
end.compact
def is_tea? path
path = File.realpath path while File.symlink? path
return File.basename(path) == "tea"
end
# find next example of ourselves
# this will either pick the Apple provided clang or the tea one
exe_path = ENV['PATH'].split(":").filter { |path|
if path == File.dirname(__FILE__)
false
elsif path == File.join($tea_prefix, ".local/bin")
false
elsif is_tea?(path)
false
else
true
end
}.map { |path|
"#{path}/#{exe}"
}.reject { |path|
# if the user created a symlink of `cc` to `tea` dont use it
File.symlink? path and File.basename(File.readlink(path)) == "tea"
}.find { |path|
File.exist?(path)
}
abort "couldnt find #{exe} in `PATH`" unless exe_path
for arg in args do
# figuring out what “mode” we are operating in is hard
# we dont want to add this linker command always because it causes a warning to be
# output if we are not outputing executables/dylibs and this warning can break
# configure scripts, however the below is not fully encompassing
# we aren't sure what the rules are TBH, possibly it is as simple as if the output (`-o`)
# is a .o then we dont add the rpath
if arg.start_with? '-l' or arg.end_with? '.dylib'
exec exe_path, *args, "-Wl,-rpath,#$tea_prefix"
end
end
exec exe_path, *args