Fix Bison and Re2c to skip regenerating files

Using only symbolic file (non-existing on disk) regenerates parser and
lexer files on consecutive build phases.

Author: petk

cmake/cmake/modules/PHP/Bison.cmake

@@ -401,11 +401,16 @@ function(php_bison name input output)
   _php_bison_process_header_option()
   _php_bison_process_verbose_option()
 
-  # Generate name for the symbolic file for the custom command below.
-  string(MAKE_C_IDENTIFIER "${name}_${input}" symbolic_name)
+  # Generate timestamp file name for the custom command below.
+  string(MAKE_C_IDENTIFIER "${name}_${input}" id)
+  set(
+    timestamp
+    ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PHP/Bison/${id}.timestamp
+  )
+  file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PHP/Bison)
 
   if(role STREQUAL "PROJECT")
-    add_custom_target(${name} SOURCES ${input} DEPENDS ${symbolic_name})
+    add_custom_target(${name} SOURCES ${input} DEPENDS ${timestamp})
   endif()
 
   # Skip generation, if generated files are provided by the release archive.
@@ -439,7 +444,8 @@ function(php_bison name input output)
   # the same generated source file is used by multiple project
   # libraries/targets.
   add_custom_command(
-    OUTPUT ${symbolic_name}
+    OUTPUT ${timestamp}
+    COMMAND ${CMAKE_COMMAND} -E touch ${timestamp}
     ${commands}
     DEPENDS
       ${input}
@@ -450,7 +456,6 @@ function(php_bison name input output)
     COMMAND_EXPAND_LISTS
     WORKING_DIRECTORY ${parsed_WORKING_DIRECTORY}
   )
-  set_source_files_properties(${symbolic_name} PROPERTIES SYMBOLIC TRUE)
 
   add_custom_command(OUTPUT ${outputs} DEPENDS ${name} ${codegen})
 endfunction()

cmake/cmake/modules/PHP/Re2c.cmake

@@ -387,10 +387,15 @@ function(php_re2c name input output)
   _php_re2c_process_header_option()
 
   # Generate name for the symbolic file for the custom command below.
-  string(MAKE_C_IDENTIFIER "${name}_${input}" symbolic_name)
+  string(MAKE_C_IDENTIFIER "${name}_${input}" id)
+  set(
+    timestamp
+    ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PHP/Re2c/${id}.timestamp
+  )
+  file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PHP/Re2c)
 
   if(role STREQUAL "PROJECT")
-    add_custom_target(${name} SOURCES ${input} DEPENDS ${symbolic_name})
+    add_custom_target(${name} SOURCES ${input} DEPENDS ${timestamp})
   endif()
 
   # Skip generation, if generated files are provided by the release archive.
@@ -425,7 +430,8 @@ function(php_re2c name input output)
   # the same generated source file is used by multiple project
   # libraries/targets.
   add_custom_command(
-    OUTPUT ${symbolic_name}
+    OUTPUT ${timestamp}
+    COMMAND ${CMAKE_COMMAND} -E touch ${timestamp}
     ${commands}
     DEPENDS
       ${input}
@@ -437,7 +443,6 @@ function(php_re2c name input output)
     ${codegen}
     WORKING_DIRECTORY ${parsed_WORKING_DIRECTORY}
   )
-  set_source_files_properties(${symbolic_name} PROPERTIES SYMBOLIC TRUE)
 
   add_custom_command(OUTPUT ${outputs} DEPENDS ${name} ${codegen})
 endfunction()