bug#45934: native-comp - Dylib ID of ELN files not optimal

[akrl--- via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

[-- Attachment #1: Type: text/plain, Size: 114 bytes --]

Ciao Davide,

could you give it a try with the following blind patch? (can't test it
my-self).

Thanks

  Andrea


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: 0001-On-MacOS-set-a-unique-dylib-ID-Bug-45934.patch --]
[-- Type: text/x-diff, Size: 1130 bytes --]

From c4990edcea51e273452e13a4b9b98549aa62a508 Mon Sep 17 00:00:00 2001
From: Andrea Corallo <akrl@sdf.org>
Date: Thu, 28 Jan 2021 22:54:49 +0100
Subject: [PATCH] * On MacOS set a unique dylib ID (Bug#45934)

	* src/comp.c (Fcomp__compile_ctxt_to_file): On MacOS set a unique
	dylib ID (Bug#45934).
---
 src/comp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/comp.c b/src/comp.c
index b5adc3ed86..d959c3188c 100644
--- a/src/comp.c
+++ b/src/comp.c
@@ -4374,6 +4374,16 @@ DEFUN ("comp--compile-ctxt-to-file", Fcomp__compile_ctxt_to_file,
 				  GCC_JIT_INT_OPTION_OPTIMIZATION_LEVEL,
 				  comp.speed < 0 ? 0
 				  : (comp.speed > 3 ? 3 : comp.speed));
+
+/* On MacOS set a unique dylib ID (Bug#45934). */
+#if defined (LIBGCCJIT_HAVE_gcc_jit_context_add_driver_option) \
+  && defined (DARWIN_OS)
+  gcc_jit_context_add_driver_option (
+    comp.ctxt,
+    SSDATA (concat2 (build_string ("-install_name "),
+		     Ffile_name_nondirectory (filename))));
+#endif
+
   comp.d_default_idx =
     CALL1I (comp-data-container-idx, CALL1I (comp-ctxt-d-default, Vcomp_ctxt));
   comp.d_impure_idx =
-- 
2.20.1