changes needed to successfully build gcc (#83)

* clang doesn't have `-nodefaultrpaths`
* try `MachO::FatFile` if `MachO:MachOFile` fails
* add explicit comments
* use `MachO.open()`
* fix fetch.ts for no src pkgs

Co-authored-by: Max Howell <mxcl@me.com>

projects/tea.xyz/gx/cc/cc.rb

@@ -11,8 +11,9 @@ $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,#$tea_prefix"
+  arg unless arg == "-Wl,-rpath,#$tea_prefix" or arg == "-nodefaultrpaths"
 end.compact
 
 # find next example of ourselves

projects/tea.xyz/gx/cc/package.yml

@@ -3,7 +3,7 @@ distributable: ~
 # FIXME we want the c version eg. c99 
 # or should that be some kind of option? so you specify you want a cc that support c99
 versions:
-  - 0.1.1
+  - 0.1.2
 
 dependencies:
   linux:

scripts/brewkit/fix-machos.rb

@@ -41,7 +41,7 @@ end
 
 class Fixer
   def initialize(file)
-    @file = MachO::MachOFile.new(file)
+    @file = MachO.open(file)
     @changed = false
   end
 

scripts/fetch.ts

@@ -53,7 +53,12 @@ export async function fetch_src(pkg: Package): Promise<[Path, Path] | undefined>
 if (import.meta.main) {
   for await (let pkg of ARGV.pkgs()) {
     pkg = await pantry.resolve(pkg)
-    const rv = await fetch_src(pkg) ?? panic()
+    const rv = await fetch_src(pkg)
-    await print(rv.join("\n") + "\n")
+    if (rv) {
+      // a package doesn’t require a source tarball
+      //FIXME is this dumb tho? In theory a package could just be a build script that generates itself
+      // in practice this is rare and pkgs could just specify some dummy tarball
+      await print(rv.join("\n") + "\n")
+    }
   }
 }