[ld] add --print-* for diagnostics

This adds the following for passthrough to lld:
- `--print-gc-sections`
- `--print-icf-sections`
- `--print-map`

I am not adding these to the cache manifest, since it does not change
the produced artifacts.

Tested with an example from #11398: it successfully prints the resulting
map and the GC'd sections.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/link/Elf.zig b/src/link/Elf.zig
index e63fa07187..1d49198937 100644
--- a/src/link/Elf.zig
+++ b/src/link/Elf.zig
@@ -1482,6 +1482,18 @@ fn linkWithLLD(self: *Elf, comp: *Compilation, prog_node: *std.Progress.Node) !v
             try argv.append("--gc-sections");
         }
 
+        if (self.base.options.print_gc_sections) {
+            try argv.append("--print-gc-sections");
+        }
+
+        if (self.base.options.print_icf_sections) {
+            try argv.append("--print-icf-sections");
+        }
+
+        if (self.base.options.print_map) {
+            try argv.append("--print-map");
+        }
+
         if (self.base.options.eh_frame_hdr) {
             try argv.append("--eh-frame-hdr");
         }