[reactos] 04/04: [UCRT] fenv.h: Fix GCC build of _Fenv1

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=de3a6706e7ea508024ccd…

commit de3a6706e7ea508024ccd63a4b7993931b4354d6
Author:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
AuthorDate: Mon Nov 4 16:28:56 2024 +0200
Commit:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
CommitDate: Thu Jan 30 11:30:32 2025 +0200

    [UCRT] fenv.h: Fix GCC build of _Fenv1
---
 sdk/include/ucrt/fenv.h | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/sdk/include/ucrt/fenv.h b/sdk/include/ucrt/fenv.h
index 6384e4697b5..37e0ecd4110 100644
--- a/sdk/include/ucrt/fenv.h
+++ b/sdk/include/ucrt/fenv.h
@@ -64,12 +64,17 @@ _ACRTIMP int __cdecl fesetround(_In_ int _Round);
         // initialized, indicating no exceptions are masked.  In the current
         // implementation (_Fenv1), the global variable is initialized with all
         // exceptions masked, which is the actual initial environment.
+        #ifdef __cplusplus
+            #define CPP_EXTERN extern
+        #else
+            #define CPP_EXTERN
+        #endif
         #if defined _M_IX86
-            __declspec(selectany) extern const fenv_t _Fenv1 = { 0x3f3f103f, 0 };
+            CPP_EXTERN __declspec(selectany) const fenv_t _Fenv1 = { 0x3f3f103f, 0 };
         #elif defined _M_X64
-            __declspec(selectany) extern const fenv_t _Fenv1 = { 0x3f00003f, 0 };
+            CPP_EXTERN __declspec(selectany) const fenv_t _Fenv1 = { 0x3f00003f, 0 };
         #else
-            __declspec(selectany) extern const fenv_t _Fenv1 = { 0x0000003f, 0 };
+            CPP_EXTERN __declspec(selectany) const fenv_t _Fenv1 = { 0x0000003f, 0 };
         #endif
     #endif