From 79d96ebdb7f75ea5ac73adca12d3f125981a1f5c Mon Sep 17 00:00:00 2001
From: Vollstrecker <werner@vollstreckernet.de>
Date: Wed, 11 Dec 2024 09:07:56 +0100
Subject: CMake: Clear variable with unset.

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ef5f46a..4fd462a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,12 +55,13 @@ if(NOT ZLIB_CONF_WRITTEN)
     set(ZLIB_CONF_WRITTEN TRUE CACHE BOOL "zconf.h.cmakein was created")
     mark_as_advanced(ZLIB_CONF_WRITTEN)
 endif(NOT ZLIB_CONF_WRITTEN)
+
 #
 # Check to see if we have large file support
 #
 set(CMAKE_REQUIRED_DEFINITIONS -D_LARGEFILE64_SOURCE=1)
 check_type_size(off64_t OFF64_T)
-set(CMAKE_REQUIRED_DEFINITIONS) # clear variable
+unset(CMAKE_REQUIRED_DEFINITIONS) # clear variable
 
 #
 # Check for fseeko
@@ -87,6 +88,7 @@ check_c_source_compiles(
     "
     HAVE___ATTR__VIS_HIDDEN)
 
+unset(CMAKE_COMPILE_FLAGS)
 set(ZLIB_PC ${zlib_BINARY_DIR}/zlib.pc)
 configure_file(${zlib_SOURCE_DIR}/zlib.pc.cmakein
                ${ZLIB_PC} @ONLY)
-- 
cgit v1.2.3-55-g6feb