config/user-libfetch.m4

   1 dnl #
   2 dnl # Check for a libfetch - either fetch(3) or libcurl.
   3 dnl #
   4 dnl # There are two configuration dimensions:
   5 dnl #   * fetch(3) vs libcurl
   6 dnl #   * static vs dynamic
   7 dnl #
   8 dnl # fetch(3) is only dynamic.
   9 dnl # We use sover 6, which first appeared in FreeBSD 8.0-RELEASE.
  10 dnl #
  11 dnl # libcurl development packages include curl-config(1) – we want:
  12 dnl #   * HTTPS support
  13 dnl #   * version at least 7.16 (October 2006), for sover 4
  14 dnl #   * to decide if it's static or not
  15 dnl #
  16 AC_DEFUN([ZFS_AC_CONFIG_USER_LIBFETCH], [
  17         AC_MSG_CHECKING([for libfetch])
  18         LIBFETCH_LIBS=
  19         LIBFETCH_IS_FETCH=0
  20         LIBFETCH_IS_LIBCURL=0
  21         LIBFETCH_DYNAMIC=0
  22         LIBFETCH_SONAME=
  23         have_libfetch=
  24
  25         saved_libs="$LIBS"
  26         LIBS="$LIBS -lfetch"
  27         AC_LINK_IFELSE([AC_LANG_PROGRAM([[
  28                 #include <sys/param.h>
  29                 #include <stdio.h>
  30                 #include <fetch.h>
  31         ]], [fetchGetURL("", "");])], [
  32                 have_libfetch=1
  33                 LIBFETCH_IS_FETCH=1
  34                 LIBFETCH_DYNAMIC=1
  35                 LIBFETCH_SONAME="libfetch.so.6"
  36                 LIBFETCH_LIBS="-ldl"
  37                 AC_MSG_RESULT([fetch(3)])
  38         ], [])
  39         LIBS="$saved_libs"
  40
  41         if test -z "$have_libfetch"; then
  42                 if curl-config --protocols 2>/dev/null | grep -q HTTPS &&
  43                     test "$(printf "%u" "0x$(curl-config --vernum)")" -ge "$(printf "%u" "0x071000")"; then
  44                         have_libfetch=1
  45                         LIBFETCH_IS_LIBCURL=1
  46                         if test "$(curl-config --built-shared)" = "yes"; then
  47                                 LIBFETCH_DYNAMIC=1
  48                                 LIBFETCH_SONAME="libcurl.so.4"
  49                                 LIBFETCH_LIBS="-ldl"
  50                                 AC_MSG_RESULT([libcurl])
  51                         else
  52                                 LIBFETCH_LIBS="$(curl-config --libs)"
  53                                 AC_MSG_RESULT([libcurl (static)])
  54                         fi
  55
  56                         CCFLAGS="$CCFLAGS $(curl-config --cflags)"
  57                 fi
  58         fi
  59
  60         if test -z "$have_libfetch"; then
  61                 AC_MSG_RESULT([none])
  62         fi
  63
  64         AC_SUBST([LIBFETCH_LIBS])
  65         AC_SUBST([LIBFETCH_DYNAMIC])
  66         AC_SUBST([LIBFETCH_SONAME])
  67         AC_DEFINE_UNQUOTED([LIBFETCH_IS_FETCH], [$LIBFETCH_IS_FETCH], [libfetch is fetch(3)])
  68         AC_DEFINE_UNQUOTED([LIBFETCH_IS_LIBCURL], [$LIBFETCH_IS_LIBCURL], [libfetch is libcurl])
  69         AC_DEFINE_UNQUOTED([LIBFETCH_DYNAMIC], [$LIBFETCH_DYNAMIC], [whether the chosen libfetch is to be loaded at run-time])
  70         AC_DEFINE_UNQUOTED([LIBFETCH_SONAME], ["$LIBFETCH_SONAME"], [soname of chosen libfetch])
  71 ])