From: Eric Haszlakiewicz <erh+git@nimenees.com>
Date: Fri, 6 Dec 2019 05:15:14 +0000 (-0500)
Subject: Set cmake policy CMP0075, to have check_include_file use the value of CMAKE_REQUIRED_... 
X-Git-Tag: json-c-0.14-20200419~68
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=6c55f65d07a972dbd2d1668aab2e0056ccdd52fc;p=json-c

Set cmake policy CMP0075, to have check_include_file use the value of CMAKE_REQUIRED_LIBRARIES (currently, adds -lm).  See issue #510.
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 569462f..0008cbb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -19,6 +19,12 @@ if(POLICY CMP0054)
     cmake_policy(SET CMP0054 NEW)
 endif()
 
+# Include file check macros honor CMAKE_REQUIRED_LIBRARIES
+# i.e. the check_include_file() calls will include -lm when checking.
+if(POLICY CMP0075)
+	cmake_policy(SET CMP0075 NEW)
+endif()
+
 include(CTest)
 
 if (CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING AND