SDL: cmake: check for math library functions even in the absence of libm

From ca541789eaaf480f19667def4a3bd1e504f1e598 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 aff778358b79..19a134970af2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1041,7 +1041,8 @@ if(SDL_LIBC)
     if(HAVE_LIBM)
       cmake_push_check_state()
       list(APPEND 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
@@ -1050,7 +1051,8 @@ if(SDL_LIBC)
         set(LIBC_HASVAR "LIBC_HAS_${_UPPER}")
         check_symbol_exists("${_FN}" "math.h" ${LIBC_HASVAR})
         set(HAVE_${_UPPER} ${${LIBC_HASVAR}})
-      endforeach()
+    endforeach()
+    if(HAVE_LIBM)
       cmake_pop_check_state()
       if(NOT VITA)
         list(APPEND EXTRA_LIBS m)