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         "$CC" --version
  75         ;;
  76     xl*)
  77         # XL C for AIX recognizes -qversion, prints to stdout and exits with 0,
  78         # but on an unknown command-line flag displays its man page and waits.
  79         "$CC" -qversion
  80         ;;
  81     sun*)
  82         # Sun compilers recognize -V, print to stderr and exit with an error.
  83         "$CC" -V 2>&1 || :
  84         ;;
  85     cc)
  86         case `uname -s` in
  87         SunOS)
  88             # Most likely Sun C.
  89             "$CC" -V 2>&1 || :
  90             ;;
  91         Darwin)
  92             # Most likely Clang.
  93             "$CC" --version
  94             ;;
  95         Linux|FreeBSD|NetBSD|OpenBSD)
  96             # Most likely Clang or GCC.
  97             "$CC" --version
  98             ;;
  99         esac
 100         ;;
 101     *)
 102         "$CC" --version || "$CC" -V || :
 103         ;;
 104     esac
 105 }
 106
 107 # For the current C compiler try to print a short and uniform identification
 108 # string (such as "gcc-9.3.0") that is convenient to use in a case statement.
 109 # shellcheck disable=SC2006
 110 cc_id() {
 111     cc_id_firstline=`print_cc_version | head -1`
 112
 113     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.*clang version \([0-9\.]*\).*$/clang-\1/'`
 114     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 115         echo "$cc_id_guessed"
 116         return
 117     fi
 118
 119     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^IBM XL C.* for AIX, V\([0-9\.]*\).*$/xlc-\1/'`
 120     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 121         echo "$cc_id_guessed"
 122         return
 123     fi
 124
 125     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.* Sun C \([0-9\.]*\) .*$/suncc-\1/'`
 126     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 127         echo "$cc_id_guessed"
 128         return
 129     fi
 130
 131     cc_id_guessed=`echo "$cc_id_firstline" | sed 's/^.* (.*) \([0-9\.]*\)$/gcc-\1/'`
 132     if [ "$cc_id_firstline" != "$cc_id_guessed" ]; then
 133         echo "$cc_id_guessed"
 134         return
 135     fi
 136 }
 137
 138 # For the current C compiler try to print CFLAGS value that tells to treat
 139 # warnings as errors.
 140 # shellcheck disable=SC2006
 141 cc_werr_cflags() {
 142     case `cc_id` in
 143     gcc-*|clang-*)
 144         echo '-Werror'
 145         ;;
 146     xlc-*)
 147         echo '-qhalt=w'
 148         ;;
 149     suncc-*)
 150         echo '-errwarn=%all'
 151         ;;
 152     esac
 153 }
 154
 155 increment() {
 156     # No arithmetic expansion in Solaris /bin/sh before 11.
 157     echo "${1:?} + 1" | bc
 158 }
 159
 160 # Display text in magenta.
 161 echo_magenta() {
 162     # ANSI magenta, the imploded text, ANSI reset, newline.
 163     printf '\033[35;1m%s\033[0m\n' "$*"
 164 }
 165
 166 # Run a command after displaying it.
 167 run_after_echo() {
 168     : "${1:?}" # Require at least one argument.
 169     printf '$ %s\n' "$*"
 170     "$@"
 171 }
 172
 173 print_so_deps() {
 174     # shellcheck disable=SC2006
 175     case `uname -s` in
 176     Darwin)
 177         run_after_echo otool -L "${1:?}"
 178         ;;
 179     *)
 180         run_after_echo ldd "${1:?}"
 181         ;;
 182     esac
 183 }
 184
 185 # Beware that setting MATRIX_DEBUG for tcpdump or tcpslice will produce A LOT
 186 # of additional output there and in any nested libpcap builds. Multiplied by
 187 # the matrix size, the full output log size might exceed limits of some CI
 188 # systems (as it had previously happened with Travis CI). Use with caution on
 189 # a reduced matrix.
 190 handle_matrix_debug() {
 191     [ "$MATRIX_DEBUG" != yes ] && return
 192     echo '$ cat Makefile [...]'
 193     sed '/^# DO NOT DELETE THIS LINE -- mkdep uses it.$/q' <Makefile
 194     run_after_echo cat config.h
 195     [ "$CMAKE" = yes ] || run_after_echo cat config.log
 196 }
 197
 198 purge_directory() {
 199     # shellcheck disable=SC2006
 200     if [ "`uname -s`" = SunOS ] && [ "`uname -r`" = 5.11 ]; then
 201         # In Solaris 11 /bin/sh the pathname expansion of "*" always includes
 202         # "." and "..", so the straightforward rm would always fail.
 203         (
 204             cd "${1:?}"
 205             for pd_each in *; do
 206                 if [ "$pd_each" != . ] && [ "$pd_each" != .. ]; then
 207                     rm -rf "$pd_each"
 208                 fi
 209             done
 210         )
 211     else
 212         rm -rf "${1:?}"/*
 213     fi
 214 }
 215
 216 # vi: set tabstop=4 softtabstop=0 expandtab shiftwidth=4 smarttab autoindent :