From 03ba15aa427ab0b7a445d1fbc4fafff8f292760c Mon Sep 17 00:00:00 2001
From: Charles Bicari <bicari.charles@gmail.com>
Date: Thu, 30 Apr 2026 15:49:42 -0400
Subject: [PATCH] constants: Protect F which is defined as a macro by some
 frameworks

For instance, ESP32 platform globally defines:

    esp32/WString.h: #define F(string_literal)  (FPSTR(PSTR(string_literal)))
---
 include/boost/math/constants/constants.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/math/constants/constants.hpp b/include/boost/math/constants/constants.hpp
index bdc0a74e27..d162af7475 100644
--- a/include/boost/math/constants/constants.hpp
+++ b/include/boost/math/constants/constants.hpp
@@ -129,7 +129,7 @@ namespace boost{ namespace math
          {
             initializer()
             {
-               F();
+               (F)();
             }
             void force_instantiate()const{}
          };