From de4c7dfdd9501e286e0e525446e82ff340a628f4 Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Sun, 2 Jun 2024 09:36:20 +0800
Subject: [PATCH] fixes #22798; Duplicate libraries linker warning (i.e.,
 '-lm') on macOS (#23292)

fixes #22798

Per
https://stackoverflow.com/questions/33675638/gcc-link-the-math-library-by-default-in-c-on-mac-os-x
and
https://stackoverflow.com/questions/30694042/c-std-library-dont-appear-to-be-linked-in-object-file

> There's no separate math library on OSX. While a lot of systems ship
functions in the standard C math.h header in a separate math library,
OSX does not do that, it's part of the libSystem library, which is
always linked in.

required by https://github.com/nim-lang/Nim/pull/23290
---
 lib/pure/fenv.nim | 2 +-
 lib/pure/math.nim | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/pure/fenv.nim b/lib/pure/fenv.nim
index ddb6a1a0c3..1d96fd6be6 100644
--- a/lib/pure/fenv.nim
+++ b/lib/pure/fenv.nim
@@ -12,7 +12,7 @@
 ## The types, vars and procs are bindings for the C standard library
 ## [<fenv.h>](https://en.cppreference.com/w/c/numeric/fenv) header.
 
-when defined(posix) and not defined(genode):
+when defined(posix) and not defined(genode) and not defined(macosx):
   {.passl: "-lm".}
 
 var
diff --git a/lib/pure/math.nim b/lib/pure/math.nim
index 1ca4825a2d..73a60e9744 100644
--- a/lib/pure/math.nim
+++ b/lib/pure/math.nim
@@ -155,7 +155,7 @@ func fac*(n: int): int =
 
 {.push checks: off, line_dir: off, stack_trace: off.}
 
-when defined(posix) and not defined(genode):
+when defined(posix) and not defined(genode) and not defined(macosx):
   {.passl: "-lm".}
 
 const