scripts/gcc-plugin.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 srctree=$(dirname "$0")
   4
   5 SHOW_ERROR=
   6 if [ "$1" = "--show-error" ] ; then
   7         SHOW_ERROR=1
   8         shift || true
   9 fi
  10
  11 gccplugins_dir=$($3 -print-file-name=plugin)
  12 plugincc=$($1 -E -x c++ - -o /dev/null -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
  13 #include "gcc-common.h"
  14 #if BUILDING_GCC_VERSION >= 4008 || defined(ENABLE_BUILD_WITH_CXX)
  15 #warning $2 CXX
  16 #else
  17 #warning $1 CC
  18 #endif
  19 EOF
  20 )
  21
  22 if [ $? -ne 0 ]
  23 then
  24         if [ -n "$SHOW_ERROR" ] ; then
  25                 echo "${plugincc}" >&2
  26         fi
  27         exit 1
  28 fi
  29
  30 case "$plugincc" in
  31         *"$1 CC"*)
  32                 echo "$1"
  33                 exit 0
  34                 ;;
  35
  36         *"$2 CXX"*)
  37                 # the c++ compiler needs another test, see below
  38                 ;;
  39
  40         *)
  41                 exit 1
  42                 ;;
  43 esac
  44
  45 # we need a c++ compiler that supports the designated initializer GNU extension
  46 plugincc=$($2 -c -x c++ -std=gnu++98 - -fsyntax-only -I"${srctree}"/gcc-plugins -I"${gccplugins_dir}"/include 2>&1 <<EOF
  47 #include "gcc-common.h"
  48 class test {
  49 public:
  50         int test;
  51 } test = {
  52         .test = 1
  53 };
  54 EOF
  55 )
  56
  57 if [ $? -eq 0 ]
  58 then
  59         echo "$2"
  60         exit 0
  61 fi
  62
  63 if [ -n "$SHOW_ERROR" ] ; then
  64         echo "${plugincc}" >&2
  65 fi
  66 exit 1