ceph/src/dpdk/scripts/auto-config-h.sh

   1 #!/bin/sh
   2 #
   3 #   BSD LICENSE
   4 #
   5 #   Copyright 2014-2015 6WIND S.A.
   6 #
   7 #   Redistribution and use in source and binary forms, with or without
   8 #   modification, are permitted provided that the following conditions
   9 #   are met:
  10 #
  11 #     * Redistributions of source code must retain the above copyright
  12 #       notice, this list of conditions and the following disclaimer.
  13 #     * Redistributions in binary form must reproduce the above copyright
  14 #       notice, this list of conditions and the following disclaimer in
  15 #       the documentation and/or other materials provided with the
  16 #       distribution.
  17 #     * Neither the name of 6WIND S.A. nor the names of its
  18 #       contributors may be used to endorse or promote products derived
  19 #       from this software without specific prior written permission.
  20 #
  21 #   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22 #   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23 #   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24 #   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25 #   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26 #   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27 #   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28 #   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29 #   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30 #   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31 #   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32 #
  33 # Crude script to detect whether particular types, macros and functions are
  34 # defined by trying to compile a file with a given header. Can be used to
  35 # perform cross-platform checks since the resulting object file is not
  36 # executed.
  37 #
  38 # Set VERBOSE=1 in the environment to display compiler output and errors.
  39 #
  40 # CC, CPPFLAGS, CFLAGS, EXTRA_CPPFLAGS and EXTRA_CFLAGS are taken from the
  41 # environment.
  42 #
  43 # AUTO_CONFIG_CFLAGS may append additional CFLAGS without modifying the
  44 # above variables.
  45
  46 file=${1:?output file name required (config.h)}
  47 macro=${2:?output macro name required (HAVE_*)}
  48 include=${3:?include name required (foo.h)}
  49 type=${4:?object type required (define, enum, type, field, func)}
  50 name=${5:?define/type/function name required}
  51
  52 : ${CC:=cc}
  53
  54 temp=/tmp/${0##*/}.$$.c
  55
  56 case $type in
  57 define)
  58         code="\
  59 #ifndef $name
  60 #error $name not defined
  61 #endif
  62 "
  63         ;;
  64 enum)
  65         code="\
  66 long test____ = $name;
  67 "
  68         ;;
  69 type)
  70         code="\
  71 $name test____;
  72 "
  73         ;;
  74 field)
  75         code="\
  76 void test____(void)
  77 {
  78         ${name%%.*} test_____;
  79
  80         (void)test_____.${name#*.};
  81 }
  82 "
  83         ;;
  84 func)
  85         code="\
  86 void (*test____)() = (void (*)())$name;
  87 "
  88         ;;
  89 *)
  90         unset error
  91         : ${error:?unknown object type \"$type\"}
  92         exit
  93 esac
  94
  95 if [ "${VERBOSE}" = 1 ]
  96 then
  97         err=2
  98         out=1
  99         eol='
 100 '
 101 else
 102         exec 3> /dev/null ||
 103         exit
 104         err=3
 105         out=3
 106         eol=' '
 107 fi &&
 108 printf 'Looking for %s %s in %s.%s' \
 109         "${name}" "${type}" "${include}" "${eol}" &&
 110 printf "\
 111 #include <%s>
 112
 113 %s
 114 " "$include" "$code" > "${temp}" &&
 115 if ${CC} ${CPPFLAGS} ${EXTRA_CPPFLAGS} ${CFLAGS} ${EXTRA_CFLAGS} \
 116         ${AUTO_CONFIG_CFLAGS} \
 117         -c -o /dev/null "${temp}" 1>&${out} 2>&${err}
 118 then
 119         rm -f "${temp}"
 120         printf "\
 121 #ifndef %s
 122 #define %s 1
 123 #endif /* %s */
 124
 125 " "${macro}" "${macro}" "${macro}" >> "${file}" &&
 126         printf 'Defining %s.\n' "${macro}"
 127 else
 128         rm -f "${temp}"
 129         printf "\
 130 /* %s is not defined. */
 131
 132 " "${macro}" >> "${file}" &&
 133         printf 'Not defining %s.\n' "${macro}"
 134 fi
 135
 136 exit