The Tcpdump Group git mirrors - tcpdump/blob - build_common.sh

   1 #!/bin/sh -e
   2
   3 # The only purpose of the above shebang is to orient shellcheck right.
   4 # To make CI scripts maintenance simpler, copies of this file in the
   5 # libpcap, tcpdump and tcpslice git repositories should be identical.
   6 # Please mind that Solaris /bin/sh before 11 does not support the $()
   7 # command substitution syntax, hence the SC2006 directives.
   8
   9 # A poor man's mktemp(1) for OSes that don't have one (e.g. AIX 7, Solaris 9).
  10 mktempdir_diy() {
  11     while true; do
  12         # /bin/sh implements $RANDOM in AIX 7, but not in Solaris before 11,
  13         # thus use dd and od instead.
  14         # shellcheck disable=SC2006
  15         mktempdir_diy_suffix=`dd if=/dev/urandom bs=1 count=4 2>/dev/null | od -t x -A n | head -1 | tr -d '\t '`
  16         [ -z "$mktempdir_diy_suffix" ] && return 1
  17         mktempdir_diy_path="${TMPDIR:-/tmp}/${1:?}.${mktempdir_diy_suffix}"
  18         # "test -e" would be more appropriate, but it is not available in
  19         # Solaris /bin/sh before 11.
  20         if [ ! -d "$mktempdir_diy_path" ]; then
  21             mkdir "$mktempdir_diy_path"
  22             chmod go= "$mktempdir_diy_path"
  23             echo "$mktempdir_diy_path"
  24             break
  25         fi
  26         # Try again (AIX /dev/urandom returns zeroes quite often).
  27     done
  28 }
  29
  30 mktempdir() {
  31     mktempdir_prefix=${1:-tmp}
  32     # shellcheck disable=SC2006
  33     case `uname -s` in
  34     Darwin|FreeBSD|NetBSD)
  35         # In these operating systems mktemp(1) always appends an implicit
  36         # ".XXXXXXXX" suffix to the requested template when creating a
  37         # temporary directory.
  38         mktemp -d -t "$mktempdir_prefix"
  39         ;;
  40     AIX)
  41         mktempdir_diy "$mktempdir_prefix"
  42         ;;
  43     SunOS)
  44         # shellcheck disable=SC2006
  45         case `uname -r` in
  46         5.10|5.11)
  47             mktemp -d -t "${mktempdir_prefix}.XXXXXXXX"
  48             ;;
  49         *)
  50             mktempdir_diy "$mktempdir_prefix"
  51             ;;
  52         esac
  53         ;;
  54     *)
  55         # At least Linux and OpenBSD implementations require explicit trailing
  56         # X'es in the template, so make it the same suffix as above.
  57         mktemp -d -t "${mktempdir_prefix}.XXXXXXXX"
  58         ;;
  59     esac
  60 }
  61
  62 print_sysinfo() {
  63     uname -a
  64     date
  65 }
  66
  67 # Try to make the current C compiler print its version information (usually
  68 # multi-line) to stdout.
  69 # shellcheck disable=SC2006
  70 print_cc_version() {
  71     case `basename "$CC"` in
  72     gcc*|egcc*|clang*)
  73         # GCC and Clang recognize --version, print to stdout and exit with 0.
  74         "$CC" --version
  75         ;;
  76     xl*)
  77         # XL C 12.1 and 13.1 recognize "-qversion", print to stdout and exit
  78         # with 0. XL C 12.1 on an unknown command-line flag displays its man
  79         # page and waits.
  80         # XL C 16.1 recognizes "-qversion" and "--version", prints to stdout
  81         # and exits with 0. Community Edition also prints a banner to stderr.
  82         "$CC" -qversion 2>/dev/null
  83         ;;
  84     sun*)
  85         # Sun compilers recognize -V, print to stderr and exit with an error.
  86         "$CC" -V 2>&1 || :
  87         ;;
  88     cc)
  89         case `uname -s` in
  90         SunOS)
  91             # Most likely Sun C.
  92             "$CC" -V 2>&1 || :
  93             ;;
  94         Darwin)
  95             # Most likely Clang.
  96             "$CC" --version
  97             ;;
  98         Linux|FreeBSD|NetBSD|OpenBSD)
  99             # Most likely Clang or GCC.
 100             "$CC" --version
 101             ;;
 102         esac
 103         ;;
 104     *)
 105         "$CC" --version || "$CC" -V || :
 106         ;;
 107     esac
 108 }
 109
 110 # For the current C compiler try to print a short and uniform identification
 111 # string (such as "gcc-9.3.0") that is convenient to use in a case statement.
 112 # shellcheck disable=SC2006
 113 cc_id() {
 114     cc_id_firstline=`print_cc_version | head -1`
 115
 116     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.*clang version \([0-9\.]*\).*$/clang-\1/'`
 117     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 118         echo "$cc_id_guessed"
 119         return
 120     fi
 121
 122     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^IBM XL C.*, V\([0-9\.]*\).*$/xlc-\1/'`
 123     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 124         echo "$cc_id_guessed"
 125         return
 126     fi
 127
 128     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.* Sun C \([0-9\.]*\) .*$/suncc-\1/'`
 129     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 130         echo "$cc_id_guessed"
 131         return
 132     fi
 133
 134     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.* (.*) \([0-9\.]*\)$/gcc-\1/'`
 135     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 136         echo "$cc_id_guessed"
 137         return
 138     fi
 139 }
 140
 141 # For the current C compiler try to print CFLAGS value that tells to treat
 142 # warnings as errors.
 143 # shellcheck disable=SC2006
 144 cc_werr_cflags() {
 145     case `cc_id` in
 146     gcc-*|clang-*)
 147         echo '-Werror'
 148         ;;
 149     xlc-*)
 150         # XL C 12.1 and 13.1 recognize "-qhalt=w". XL C 16.1 recognizes that
 151         # and "-Werror".
 152         echo '-qhalt=w'
 153         ;;
 154     suncc-*)
 155         echo '-errwarn=%all'
 156         ;;
 157     esac
 158 }
 159
 160 increment() {
 161     # No arithmetic expansion in Solaris /bin/sh before 11.
 162     echo "${1:?} + 1" | bc
 163 }
 164
 165 # Display text in magenta.
 166 echo_magenta() {
 167     # ANSI magenta, the imploded text, ANSI reset, newline.
 168     printf '\033[35;1m%s\033[0m\n' "$*"
 169 }
 170
 171 # Run a command after displaying it.
 172 run_after_echo() {
 173     : "${1:?}" # Require at least one argument.
 174     printf '$ %s\n' "$*"
 175     "$@"
 176 }
 177
 178 print_so_deps() {
 179     # shellcheck disable=SC2006
 180     case `uname -s` in
 181     Darwin)
 182         run_after_echo otool -L "${1:?}"
 183         ;;
 184     *)
 185         run_after_echo ldd "${1:?}"
 186         ;;
 187     esac
 188 }
 189
 190 # Beware that setting MATRIX_DEBUG for tcpdump or tcpslice will produce A LOT
 191 # of additional output there and in any nested libpcap builds. Multiplied by
 192 # the matrix size, the full output log size might exceed limits of some CI
 193 # systems (as it had previously happened with Travis CI). Use with caution on
 194 # a reduced matrix.
 195 handle_matrix_debug() {
 196     [ "$MATRIX_DEBUG" != yes ] && return
 197     echo '$ cat Makefile [...]'
 198     sed '/^# DO NOT DELETE THIS LINE -- mkdep uses it.$/q' <Makefile
 199     run_after_echo cat config.h
 200     [ "$CMAKE" = yes ] || run_after_echo cat config.log
 201 }
 202
 203 purge_directory() {
 204     # shellcheck disable=SC2006
 205     if [ "`uname -s`" = SunOS ] && [ "`uname -r`" = 5.11 ]; then
 206         # In Solaris 11 /bin/sh the pathname expansion of "*" always includes
 207         # "." and "..", so the straightforward rm would always fail.
 208         (
 209             cd "${1:?}"
 210             for pd_each in *; do
 211                 if [ "$pd_each" != . ] && [ "$pd_each" != .. ]; then
 212                     rm -rf "$pd_each"
 213                 fi
 214             done
 215         )
 216     else
 217         rm -rf "${1:?}"/*
 218     fi
 219 }
 220
 221 # vi: set tabstop=4 softtabstop=0 expandtab shiftwidth=4 smarttab autoindent :