libgcc

   1 #!/bin/bash
   2 #---------------------------------------------------------------------
   3 ##
   4 ## @Synopsis Set of functions for dealing with the problem of having to
   5 ## @Synopsis use different version of the gcc compilers.
   6 ##
   7 ## The basic usage is as follows:
   8 ## <pre>
   9 ## - If a spell works with the latest version of gcc, do nothing.
  10 ## - To change the compiler version for a spell, add a GCC_VERSION field
  11 ##   to the spells DETAILS specifying major.minor version of gcc it needs,
  12 ##   e.g. GCC_VERSION=3.4
  13 ## - add a 'depends  gccXX' to the spell where XX == majorminor,
  14 ##   e.g. 'depends  gcc34'
  15 ## - add 'invoke_gcc' to the top of PRE_BUILD if the spell has a
  16 ##   custom PRE_BUILD file
  17 ## </pre>
  18 ##
  19 ## @Implementation These functions were added to allow the use of
  20 ## @Implementation several versions of gcc in parallel.
  21 ##
  22 ##
  23 ##  @Copyright Copyright 2005 by the Source Mage Team
  24 ##
  25 ##
  26 #---------------------------------------------------------------------
  27
  28
  29 #---------------------------------------------------------------------
  30 ## @param gcc version
  31 ## @return 0 if that gcc version is being used
  32 ## @return 1 otherwise
  33 #---------------------------------------------------------------------
  34 function use_gcc()  {
  35
  36   gcc  -dumpversion  |  grep  -q  $(esc_str $1)  >  /dev/null
  37
  38 }
  39
  40 #---------------------------------------------------------------------
  41 ## @param new path to add
  42 ## @param old path
  43 ## @Stdout new path
  44 ## Echos the old path with new path prepended, separated with a ':'
  45 #---------------------------------------------------------------------
  46 function gcc_prepend_path()  {
  47
  48   if    test  -z  $2
  49   then  echo $1
  50   else  echo $1:$2
  51   fi
  52
  53 }
  54
  55
  56 #---------------------------------------------------------------------
  57 ## @param path
  58 ##
  59 ## Alters the environment so that the gcc in the specified directory
  60 ## will be used for compiling
  61 ##
  62 #---------------------------------------------------------------------
  63 function gcc_add_paths()  {
  64
  65   export  PATH=$(  gcc_prepend_path  $1/bin  $PATH  )
  66   export  LD_LIBRARY_PATH=$(  gcc_prepend_path  $1/lib  $LD_LIBRARY_PATH  )
  67   export  LD_RUN_PATH=$(  gcc_prepend_path  $1/lib  $LD_RUN_PATH  )
  68   export  INFOPATH=$(  gcc_prepend_path  $1/info  $INFOPATH  )
  69   export  CPPFLAGS="-I $1/include  $CPPFLAGS"
  70
  71 }
  72
  73
  74 #---------------------------------------------------------------------
  75 ##
  76 ## Determines if the spell specifies a gcc version to use. If so, it
  77 ## alters the environment so that that gcc version is used for compilation.
  78 ##
  79 #---------------------------------------------------------------------
  80 function invoke_gcc()  {
  81
  82   if [[ "$GCC_VERSION" ]] && ! use_gcc $GCC_VERSION; then
  83     gcc_add_paths  /opt/gcc${GCC_VERSION//.}
  84     echo  "Overriding gcc version: `gcc -dumpversion`"
  85   fi
  86
  87 }
  88
  89
  90 #---------------------------------------------------------------------
  91 ##
  92 ## This software is free software; you can redistribute it and/or modify
  93 ## it under the terms of the GNU General Public License as published by
  94 ## the Free Software Foundation; either version 2 of the License, or
  95 ## (at your option) any later version.
  96 ##
  97 ## This software is distributed in the hope that it will be useful,
  98 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
  99 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 100 ## GNU General Public License for more details.
 101 ##
 102 ## You should have received a copy of the GNU General Public License
 103 ## along with this software; if not, write to the Free Software
 104 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 105 ##
 106 #---------------------------------------------------------------------