Fix paths in generator expressions

The install() command is called in the ext directory and these paths
are treated relative to the directory at the time of the generator
expression evaluation.

Author: petk

cmake/Zend/CMakeLists.txt

@@ -205,7 +205,7 @@ target_sources(
         zend_closures_arginfo.h
         zend_closures.h
         zend_compile.h
-        $<$<PLATFORM_ID:Windows>:zend_config.w32.h>
+        $<$<PLATFORM_ID:Windows>:${CMAKE_CURRENT_SOURCE_DIR}/zend_config.w32.h>
         zend_constants_arginfo.h
         zend_constants.h
         zend_cpuinfo.h

cmake/ext/mysqlnd/CMakeLists.txt

@@ -132,7 +132,7 @@ target_sources(
   PUBLIC
     FILE_SET HEADERS
       FILES
-        $<$<PLATFORM_ID:Windows>:config-win.h>
+        $<$<PLATFORM_ID:Windows>:${CMAKE_CURRENT_SOURCE_DIR}/config-win.h>
         mysql_float_to_double.h
         mysqlnd_alloc.h
         mysqlnd_auth.h

cmake/ext/sockets/CMakeLists.txt

@@ -74,7 +74,7 @@ target_sources(
     FILE_SET HEADERS
       FILES
         php_sockets.h
-        $<$<PLATFORM_ID:Windows>:windows_common.h>
+        $<$<PLATFORM_ID:Windows>:${CMAKE_CURRENT_SOURCE_DIR}/windows_common.h>
 )
 
 target_compile_definitions(

cmake/ext/standard/CMakeLists.txt

@@ -199,7 +199,7 @@ target_sources(
         url_scanner_ex.h
         url.h
         user_filters_arginfo.h
-        $<$<PLATFORM_ID:Windows>:winver.h>
+        $<$<PLATFORM_ID:Windows>:${CMAKE_CURRENT_SOURCE_DIR}/winver.h>
 )
 
 # Check for ARM64 processor on Windows.