From 707fccb44505eb62c3736ec47473f964df883055 Mon Sep 17 00:00:00 2001
From: N'yoma Diamond <nyoma@deepform.co.uk>
Date: Mon, 2 Feb 2026 16:44:39 +0000
Subject: [PATCH] compile-time generator expression fixes overzealous
 /permissive- compiler option usage

---
 CMakeLists.txt | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8395390..b383b7b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,13 +57,7 @@ if(FASTFLOAT_SANITIZE)
   endif()
 endif()
 
-include(CheckCXXCompilerFlag)
-unset(FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
-CHECK_CXX_COMPILER_FLAG(/permissive- FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
-
-if(FASTFLOAT_COMPILER_SUPPORTS_PERMISSIVE)
-  target_compile_options(fast_float INTERFACE /permissive-)
-endif()
+target_compile_options(fast_float INTERFACE $<$<AND:$<CXX_COMPILER_ID:MSVC>,$<VERSION_GREATER_EQUAL:$<CXX_COMPILER_VERSION>,19.10>>:/permissive->)
 
 if(FASTFLOAT_INSTALL)
   include(CMakePackageConfigHelpers)