SDL: cmake: check for math library functions even in the absence of libm (0d546)

SDL Commits
1 
From 0d5467a6e96985a8c68961e86df59da15a76de90 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sat, 7 Jan 2023 14:25:04 +0300
Subject: [PATCH] cmake: check for math library functions even in the absence
 of libm

(Reference issue: https://github.com/libsdl-org/SDL/issues/7011)
---
 CMakeLists.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef6e20db686f..e539ffb6d0a9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1048,7 +1048,8 @@ if(SDL_LIBC)
     check_library_exists(m pow "" HAVE_LIBM)
     if(HAVE_LIBM)
       set(CMAKE_REQUIRED_LIBRARIES m)
-      foreach(_FN
+    endif()
+    foreach(_FN
               atan atan2 atanf atan2f ceil ceilf copysign copysignf cos cosf
               exp expf fabs fabsf floor floorf fmod fmodf log logf log10 log10f
               lround lroundf pow powf round roundf scalbn scalbnf sin sinf sqrt
@@ -1056,7 +1057,8 @@ if(SDL_LIBC)
         string(TOUPPER ${_FN} _UPPER)
         set(_HAVEVAR "HAVE_${_UPPER}")
         check_symbol_exists("${_FN}" "math.h" ${_HAVEVAR})
-      endforeach()
+    endforeach()
+    if(HAVE_LIBM)
       set(CMAKE_REQUIRED_LIBRARIES)
       if(NOT VITA)
         list(APPEND EXTRA_LIBS m)