List of changes between GCC cpp and sdcpp

This page was last updated in 2012 by Borut in the old wiki, when sdcpp was based on cpp from GCC 4. It might not reflect the current situation (sdcpp based on cpp from GCC 12).

The purpose of this document is to make synchronization of sdcc with GCC cpp easier. The following files has sdcpp specific changes:

• support/cpp/libcpp/files.c:
  specific code
• support/cpp/libcpp/init.c:
  ifdefed NLS support (don't include localedir.h)
  deps_add_default_target(): first parameter is pfile instead pfile->deps
• support/cpp/libcpp/internal.h:
  SDCC asm specific: _asm and __endasm handling
  _cpp_process_line_notes() returns int instead void
• support/cpp/libcpp/lex.c:
  include assert.h
  added global veriable in_asm
  definition of _cpp_process_line_notes() returns int
  added SDCC _asm specific function _sdcpp_skip_asm_block()
  added sdcpp specific function pedantic_lex_number()
  added sdcpp specific function copy_text_chars()
  added SDCC _asm specific function _sdcpp_save_asm ()
  cpp_get_comments() calls copy_text_chars()
  _cpp_lex_direct() calls sdcpp specific function pedantic_lex_number(), SDCC _asm specific _asm _endasm handling
  support/cpp/libcpp/macro.c:
  macro_real_token_count() returns 0 after abort() to make the compiler happy
  create_iso_definition(): sdcpp specific naked hash handling, added "%s" to cpp_error() to make the compiler happy
• support/cpp/libcpp/mkdeps.c:
  include internal.h
  deps_add_default_target(): first parameter is cpp_reader * insted struct deps *; object file extension handling
• support/cpp/libcpp/system.h:
  Mac OS X specifics
  include sdcpp.h
• support/cpp/libcpp/include/cpplib.h:
  SDCC _asm specific endasm handling
  added IN_ASM and PREV_NL flags for the cpp_token structure
  struct cpp_options: added allow_naked_hash, preproc_asm, obj_ext and pedantic_parse_number members
• support/cpp/libcpp/include/mkdeps.h:
  declaration of struct cpp_reader
  declaration of deps_add_default_target(): first parameter is pfile instead pfile->deps
• support/cpp/libcpp/include/symtab.h:
  Mac OS X specifics: include libiberty/obstack.h instead obstack.h