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Free Pascal => General => Topic started by: glorfin on November 12, 2019, 09:48:28 pm

Title: [Solved]Conditional compilation depending of fpc version?
Post by: glorfin on November 12, 2019, 09:48:28 pm
Is it possible to create a file with conditional compilation depending on a compiler version, to write code which implements newest possibilities when compiled by a new fpc, but is compatible with older ones?
Title: Re: Conditional compilation depending of fpc version?
Post by: valdir.marcos on November 13, 2019, 01:57:28 am
Quote from: glorfin on November 12, 2019, 09:48:28 pm
Is it possible to create a file with conditional compilation depending on a compiler version, to write code which implements newest possibilities when compiled by a new fpc, but is compatible with older ones?
Quote from: Paulo França Lacerda on November 17, 2016, 09:23:48 pm
Code: Pascal  [Select][+][-]
  1. const
  2.   lcl_version =  // note: 48 = Ord('0')
  3.     {$ifdef ConditionalExpressions} {$if Declared(lcl_major) and (lcl_major >= 10)}
  4.      Chr (48+(lcl_major div 10)) + {$ifend} {$endif}
  5.      Chr (48+(lcl_major mod 10)) +'.'+
  6.  
  7.     {$ifdef ConditionalExpressions} {$if Declared(lcl_minor) and (lcl_minor >= 10)}
  8.      Chr (48+(lcl_minor div 10)) + {$ifend} {$endif}
  9.      Chr (48+(lcl_minor mod 10)) +'.'+
  10.  
  11.     {$ifdef ConditionalExpressions} {$if Declared(lcl_release) and (lcl_release >= 10)}
  12.      Chr (48+(lcl_release div 10)) + {$ifend} {$endif}
  13.      Chr (48+(lcl_release mod 10)) +'.'+
  14.  
  15.     {$ifdef ConditionalExpressions} {$if Declared(lcl_patch) and (lcl_patch >= 10)}
  16.      Chr (48+(lcl_patch div 10)) + {$ifend} {$endif}
  17.      Chr (48+(lcl_patch mod 10));
https://lazarus-ccr.sourceforge.io/docs/lcl/lclversion/index.html

Directive, conditional or macro for LCL version?
https://forum.lazarus.freepascal.org/index.php/topic,22674.0.html
https://lazarus-ccr.sourceforge.io/docs/lcl/lclversion/index.html

lcl_version as constant expression
https://forum.lazarus.freepascal.org/index.php/topic,34831.0.html

Compiler definiton for lcl like {$IF LCL_VERSION>2} ?
https://forum.lazarus.freepascal.org/index.php/topic,45144.msg321468.html#msg321468

Get LCL revision or version via ifdef
http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Get-LCL-revision-or-version-via-ifdef-td3383720.html

https://wiki.freepascal.org/Conditional_compilation
https://www.freepascal.org/docs-html/prog/progch1.html
https://www.freepascal.org/docs-html/current/prog/progch2.html
https://wiki.freepascal.org/Conditional_Compiler_Options
https://wiki.freepascal.org/Macros_and_Conditionals
https://wiki.freepascal.org/local_compiler_directives
https://wiki.freepascal.org/index.php?title=local_compiler_directives&printable=yes
Title: Re: Conditional compilation depending of fpc version?
Post by: glorfin on November 13, 2019, 01:59:52 am
Thank you. It is better than nothing, but a library which I am supporting does not use LCL. Theoretically, it may be complied without lazarus. Are there LCL-independent solutions? If not, it would be nice to introduce them  ::)
Title: Re: Conditional compilation depending of fpc version?
Post by: Cyrax on November 13, 2019, 02:08:20 am
Code: Pascal  [Select][+][-]
  1. {$IF FPC_FULLVERSION >= 33000} ... ${ENDIF}
Title: Re: Conditional compilation depending of fpc version?
Post by: glorfin on November 13, 2019, 02:11:35 am
Oh, thank you, Cyrax! This is what I needed!
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