From af12c25d6da4b2b1f87c44caf85f02d42262085d Mon Sep 17 00:00:00 2001
From: Don Rolih <don.rolih@gmail.com>
Date: Wed, 23 Oct 2024 17:34:55 -0400
Subject: [PATCH] [cmake] Check if fmt is already a target

---
 CMakeLists.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a26de726..745a0a5d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -197,7 +197,10 @@ CPMAddPackage(
 )
 
 # fmt
-CPMAddPackage("gh:fmtlib/fmt#11.0.2")
+# Check if fmt is already a target; important when using as an outside library in nrgljubljana_interface
+if (NOT TARGET fmt::fmt)
+  CPMAddPackage("gh:fmtlib/fmt#11.0.2")
+endif()
 
 # range-v3
 CPMAddPackage("gh:ericniebler/range-v3#0.12.0")