mdw@git.distorted.org.uk Git - mLib/blob - utils/compiler.3

   1 .\" -*-nroff-*-
   2 .TH compiler 3 "26 May 2018" "Straylight/Edgeware" "mLib utilities library"
   3 .SH NAME
   4 compiler \- detect compiler version
   5 .\" @GCC_VERSION_P
   6 .\" @CLANG_VERSION_P
   7 .SH SYNOPSIS
   8 .nf
   9 .B "#include <mLib/compiler.h>"
  10
  11 .BI "int GCC_VERSION_P(" maj ", " min ");"
  12 .BI "int CLANG_VERSION_P(" maj ", " min ");"
  13 .fi
  14 .SH DESCRIPTION
  15 The macro invocation
  16 .BI GCC_VERSION_P( maj ", " min )
  17 expands to a compile-time constant nonzero value if the present compiler
  18 is GCC version
  19 .IR maj . min
  20 or better, or claims compatibility with it.
  21 This is frequently imperfect, as many compilers claim compatibility
  22 without implementing all of the necessary features, but it works
  23 adequately if one takes care.
  24 .PP
  25 The macro invocation
  26 .BI CLANG_VERSION_P( maj ", " min )
  27 expands to a compile-time constant nonzero value if the present compiler
  28 is Clang version
  29 .IR maj . min
  30 or better (or claims compatibility with it, but this is less likely
  31 than for GCC.
  32 .SH "SEE ALSO"
  33 .BR mLib (3).
  34 .SH "AUTHOR"
  35 Mark Wooding, <mdw@distorted.org.uk>