From 710a0bb52fa0b30874917e1a785448deb64ba3dc Mon Sep 17 00:00:00 2001
From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com>
Date: Sun, 15 Dec 2024 15:54:35 +0000
Subject: [PATCH] cmake: De-duplicate libraries on link lines opportunistically

This change resolves "ignoring duplicate libraries" linker warnings on
macOS.
---
 src/test/CMakeLists.txt      | 6 ++++++
 src/test/fuzz/CMakeLists.txt | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/src/test/CMakeLists.txt b/src/test/CMakeLists.txt
index ed73e449015..da671d9606d 100644
--- a/src/test/CMakeLists.txt
+++ b/src/test/CMakeLists.txt
@@ -14,6 +14,12 @@ generate_header_from_json(data/tx_invalid.json)
 generate_header_from_json(data/tx_valid.json)
 generate_header_from_raw(data/asmap.raw test::data)
 
+if(POLICY CMP0156)
+  # De-duplicate libraries on link lines based on linker capabilities.
+  # See: https://cmake.org/cmake/help/latest/policy/CMP0156.html
+  cmake_policy(SET CMP0156 NEW)
+endif()
+
 # Do not use generator expressions in test sources because the
 # SOURCES property is processed to gather test suite macros.
 add_executable(test_bitcoin
diff --git a/src/test/fuzz/CMakeLists.txt b/src/test/fuzz/CMakeLists.txt
index f65ed62b2d0..5353aa68904 100644
--- a/src/test/fuzz/CMakeLists.txt
+++ b/src/test/fuzz/CMakeLists.txt
@@ -4,6 +4,12 @@
 
 add_subdirectory(util)
 
+if(POLICY CMP0156)
+  # De-duplicate libraries on link lines based on linker capabilities.
+  # See: https://cmake.org/cmake/help/latest/policy/CMP0156.html
+  cmake_policy(SET CMP0156 NEW)
+endif()
+
 add_executable(fuzz
   addition_overflow.cpp
   addrman.cpp