From e63c653889f0a90d1ac894eed50249017aeb7933 Mon Sep 17 00:00:00 2001
From: Matthieu Gautier <mgautier@kymeria.fr>
Date: Mon, 12 Aug 2024 18:01:33 +0200
Subject: [PATCH] Define _USE_MATH_DEFINES even when using mingw

---
 xapian-core/config.h.meson | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/xapian-core/config.h.meson b/xapian-core/config.h.meson
index ac3246cb34..fa2477d8e7 100644
--- a/xapian-core/config.h.meson
+++ b/xapian-core/config.h.meson
@@ -432,13 +432,15 @@
  */
 # define _WINSOCK_DEPRECATED_NO_WARNINGS
 
-/* Tell MSVC we want M_PI, etc defined. */
-# define _USE_MATH_DEFINES
-
 /* Tell MSVC we don't want max() and min() macros defined. */
 # define NOMINMAX
 #endif
 
+#if defined _MSC_VER || defined __MINGW32__
+/* Tell MSVC we want M_PI, etc defined. */
+# define _USE_MATH_DEFINES
+#endif
+
 /* Make the POSIX-like functions support large files.  MSVC needs this;
  * current mingw32 does too; mingw64 supports _FILE_OFFSET_BITS, which
  * AC_SYS_LARGEFILE should discover and enable automatically.