CMake: fix more CMP0075 errors

Building with CMake 3.12 or newer would warn during configuration otherwise.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 133a5ddc50ac3b9c2ba8239b4af4f09c1abbc614..0d6b8f14062b807f7d95e3d8d77b46957d86f57f 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -481,6 +481,7 @@ ENDIF()
 IF(LIBLZMA_FOUND)
   SET(HAVE_LIBLZMA 1)
   SET(HAVE_LZMA_H 1)
+  CMAKE_PUSH_CHECK_STATE()
   SET(CMAKE_REQUIRED_INCLUDES ${LIBLZMA_INCLUDE_DIR})
   SET(CMAKE_REQUIRED_LIBRARIES ${LIBLZMA_LIBRARIES})
   INCLUDE_DIRECTORIES(${LIBLZMA_INCLUDE_DIRS})
@@ -494,6 +495,7 @@ IF(LIBLZMA_FOUND)
   IF(NOT WITHOUT_LZMA_API_STATIC AND LZMA_API_STATIC)
     ADD_DEFINITIONS(-DLZMA_API_STATIC)
   ENDIF(NOT WITHOUT_LZMA_API_STATIC AND LZMA_API_STATIC)
+  CMAKE_POP_CHECK_STATE()
 ELSE(LIBLZMA_FOUND)
 # LZMA not found and will not be used.
 ENDIF(LIBLZMA_FOUND)
@@ -549,9 +551,11 @@ IF(LIBB2_FOUND)
   SET(HAVE_BLAKE2_H 1)
   SET(ARCHIVE_BLAKE2 FALSE)
   LIST(APPEND ADDITIONAL_LIBS ${LIBB2_LIBRARY})
+  CMAKE_PUSH_CHECK_STATE()
   SET(CMAKE_REQUIRED_LIBRARIES ${LIBB2_LIBRARY})
   SET(CMAKE_REQUIRED_INCLUDES ${LIBB2_INCLUDE_DIR})
   CHECK_FUNCTION_EXISTS(blake2sp_init HAVE_LIBB2)
+  CMAKE_POP_CHECK_STATE()
 ELSE(LIBB2_FOUND)
   SET(ARCHIVE_BLAKE2 TRUE)
 ENDIF(LIBB2_FOUND)
@@ -606,17 +610,18 @@ IF(ZSTD_FOUND)
   SET(HAVE_ZSTD_H 1)
   INCLUDE_DIRECTORIES(${ZSTD_INCLUDE_DIR})
   LIST(APPEND ADDITIONAL_LIBS ${ZSTD_LIBRARY})
+  CMAKE_PUSH_CHECK_STATE()
   SET(CMAKE_REQUIRED_LIBRARIES ${ZSTD_LIBRARY})
   SET(CMAKE_REQUIRED_INCLUDES ${ZSTD_INCLUDE_DIR})
   CHECK_FUNCTION_EXISTS(ZSTD_compressStream HAVE_LIBZSTD)
   #
   # TODO: test for static library.
   #
+  CMAKE_POP_CHECK_STATE()
 ENDIF(ZSTD_FOUND)
 MARK_AS_ADVANCED(CLEAR ZSTD_INCLUDE_DIR)
 MARK_AS_ADVANCED(CLEAR ZSTD_LIBRARY)
 
-set(CMAKE_REQUIRED_LIBRARIES)
 
 #
 # Check headers