From d8b05d12d52ba390b1b8dceca784f35a13f42934 Mon Sep 17 00:00:00 2001
From: Andrey Akhmichin <15944199+nekonomicon@users.noreply.github.com>
Date: Thu, 16 Jun 2022 11:54:55 +0500
Subject: [PATCH] cmake: better tgmath.h check.

---
 CMakeLists.txt        | 11 +++++++++++
 cl_dll/CMakeLists.txt |  6 ------
 dlls/CMakeLists.txt   |  6 ------
 3 files changed, 11 insertions(+), 12 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 123cd838..0a8c657c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,6 +29,8 @@ endif()
 # Install custom module path
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake/")
 
+include(CheckIncludeFile)
+include(CheckCSourceCompiles)
 include(VSForceXPToolchain) # Force XP toolchain for Visual Studio
 
 project (HLSDK-XASH3D)
@@ -111,6 +113,15 @@ else()
 	add_definitions(-D_CRT_SILENCE_NONCONFORMING_TGMATH_H)
 endif()
 
+check_include_file("tgmath.h" HAVE_TGMATH_H)
+if(HAVE_TGMATH_H)
+	check_c_source_compiles("#include <tgmath.h>
+	const float val = 2, val2 = 3;
+	int main(){ return (int)(-asin(val) + cos(val2));" HAVE_VALID_TGMATH_H )
+	if(${HAVE_VALID_TGMATH_H})
+		add_definitions(-DHAVE_TGMATH_H)
+	endif()
+endif()
 
 if(BUILD_CLIENT)
 	add_subdirectory(cl_dll)
diff --git a/cl_dll/CMakeLists.txt b/cl_dll/CMakeLists.txt
index 0869467d..ae4a47cc 100644
--- a/cl_dll/CMakeLists.txt
+++ b/cl_dll/CMakeLists.txt
@@ -25,12 +25,6 @@ project (CLDLL)
 
 set (CLDLL_LIBRARY client)
 
-include(CheckIncludeFile)
-check_include_file("tgmath.h" HAVE_TGMATH_H)
-if(HAVE_TGMATH_H)
-	add_definitions(-DHAVE_TGMATH_H)
-endif()
-
 add_definitions(-DCLIENT_WEAPONS -DCLIENT_DLL)
 
 if(NOT MSVC)
diff --git a/dlls/CMakeLists.txt b/dlls/CMakeLists.txt
index 77cd47e6..ba828008 100644
--- a/dlls/CMakeLists.txt
+++ b/dlls/CMakeLists.txt
@@ -25,12 +25,6 @@ project (SVDLL)
 
 set (SVDLL_LIBRARY server)
 
-include(CheckIncludeFile)
-check_include_file("tgmath.h" HAVE_TGMATH_H)
-if(HAVE_TGMATH_H)
-	add_definitions(-DHAVE_TGMATH_H)
-endif()
-
 add_definitions(-DCLIENT_WEAPONS)
 
 if(NOT MSVC)