CMake: Updates for CMake 3.25 and later on Windows.

https://cmake.org/cmake/help/latest/release/3.25.html says:

"On Windows, when targeting the MSVC ABI, the find_library() command now
accepts .a file names after first considering .lib. This is symmetric
with existing behavior when targeting the GNU ABI, in which the command
accepts .lib file names after first considering .a."

If "MSVC" is defined, only search for libsmi-2. This keeps us from finding
libsmi.a. Set NO_SYSTEM_ENVIRONMENT_PATH when we're searching for zlib. This
keeps us from finding Strawberry Perl's version.

Some SpanDSP builds link with LibTIFF, but our Windows version doesn't.

cmake/modules/.editorconfig

@@ -5,3 +5,11 @@ indent_size = 4
 [FindSinsp.cmake]
 indent_style = space
 indent_size = 2
+
+[FindSMI.cmake]
+indent_style = space
+indent_size = 2
+
+[FindSPANDSP.cmake]
+indent_style = space
+indent_size = 2

cmake/modules/FindSMI.cmake

@@ -20,7 +20,11 @@ FindWSWinLibs("libsmi-.*" "SMI_HINTS")
 
 FIND_PATH(SMI_INCLUDE_DIR smi.h HINTS "${SMI_HINTS}/include" )
 
-SET(SMI_NAMES smi libsmi-2)
+IF(MSVC)
+  SET(SMI_NAMES libsmi-2)
+ELSE()
+  SET(SMI_NAMES smi libsmi-2)
+ENDIF()
 FIND_LIBRARY(SMI_LIBRARY NAMES ${SMI_NAMES} HINTS "${SMI_HINTS}/lib" )
 
 # handle the QUIETLY and REQUIRED arguments and set SMI_FOUND to TRUE if

cmake/modules/FindSPANDSP.cmake

@@ -12,10 +12,11 @@ FindWSWinLibs( "spandsp-.*" "SPANDSP_HINTS" )
 if( NOT WIN32)
   find_package(PkgConfig)
   pkg_search_module(SPANDSP spandsp)
+
+  # spandsp.h might include tiffio.h.
+  find_package(TIFF QUIET)
 endif()
 
-# spandsp.h includes tiffio.h.
-find_package(TIFF QUIET)
 
 find_path( SPANDSP_INCLUDE_DIR
   NAMES spandsp.h

cmake/modules/FindZLIB.cmake

@@ -39,6 +39,11 @@ include( FindWSWinLibs )
 # Zlib is included with GLib2
 FindWSWinLibs( "vcpkg-export-*" "ZLIB_HINTS" )
 
+if(MSVC)
+    # else we'll find Strawberry Perl's version
+    set (_zlib_sys_env_option NO_SYSTEM_ENVIRONMENT_PATH)
+endif()
+
 if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY)
     if (NOT WIN32) # else we'll find Strawberry Perl's pkgconfig
         find_package(PkgConfig)
@@ -54,6 +59,7 @@ if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY)
             ${ZLIB_HINTS}
         PATHS
             "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/include"
+	${_zlib_sys_env_option}
     )
 
     SET(ZLIB_NAMES z zlib zdll zlib1 zlibd zlibd1)
@@ -66,8 +72,10 @@ if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY)
             ${ZLIB_HINTS}
         PATHS
             "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/lib"
+	${_zlib_sys_env_option}
     )
 endif()
+unset(_zlib_sys_env_option)
 MARK_AS_ADVANCED(ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
 
 # handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if