kc3-lang/freetype/src/pcf/module.mk

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• Hash : ce33a312
  Author :
  Date : 2008-12-21T10:29:30
  

  FT_USE_MODULE declares things as:
  
    extern const FT_Module_Class
  
  (or similar for C++).  However, the actual types of the variables
  being declared are often different, e.g., FT_Driver_ClassRec or
  FT_Renderer_Class.  (Some are, indeed, FT_Module_Class.)
  
  This works with most C compilers (since those structs begin with an
  FT_Module_Class struct), but technically it's undefined behavior.
  
  To quote the ISO/IEC 9899:TC2 final committee draft, section 6.2.7
  paragraph 2:
  
    All declarations that refer to the same object or function shall
    have compatible type; otherwise, the behavior is undefined.
  
  (And they are not compatible types.)
  
  Most C compilers don't reject (or even detect!) code which has this
  issue, but the GCC LTO development branch compiler does.  (It
  outputs the types of the objects while generating .o files, along
  with a bunch of other information, then compares them when doing the
  final link-time code generation pass.)
  
  Patch from Savannah bug #25133.
  
  * src/base/ftinit.c (FT_USE_MODULE): Include variable type.
  
  * builds/amiga/include/freetype/config/ftmodule.h,
  include/freetype/config/ftmodule.h, */module.mk: Updated to declare
  pass correct types to FT_USE_MODULE.
  

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• src/pcf/module.mk

• #
  # FreeType 2 PCF module definition
  #
  
  # Copyright 2000, 2006 by
  # Francesco Zappa Nardelli
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  
  FTMODULE_H_COMMANDS += PCF_DRIVER
  
  define PCF_DRIVER
  $(OPEN_DRIVER) FT_Driver_ClassRec, pcf_driver_class $(CLOSE_DRIVER)
  $(ECHO_DRIVER)pcf       $(ECHO_DRIVER_DESC)pcf bitmap fonts$(ECHO_DRIVER_DONE)
  endef
  
  # EOF
  

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