Always pass -headerpad_max_install_names to the linker

We use install_name_tool pretty liberally, so we need to take steps to
ensure libraries and executables are always linked with this flag.

Closes #20233.
Fixes #17984.
Fixes #22078.

1 files changed, 6 insertions, 1 deletions

diff --git a/Library/ENV/4.3/cc b/Library/ENV/4.3/cc
index 62194c8dd..79fb57102 100755
--- a/Library/ENV/4.3/cc
+++ b/Library/ENV/4.3/cc
@@ -191,7 +191,12 @@ class Cmd
     syslibpath
   end
   def ldflags
-    libpath.to_flags('-L')
+    args = libpath.to_flags('-L')
+    case mode
+    when :ld   then args << '-headerpad_max_install_names'
+    when :ccld then args << '-Wl,-headerpad_max_install_names'
+    end
+    args
   end
   def cppflags
     sys, opt = cpath