Merge pull request #1454 from rubenk/libi2c-dev-mark-as-linux-only

libi2c only exists on Linux

diff --combined configure.ac
index afb0819,f46cedb..82591e4
--- 1/configure.ac
--- 2/configure.ac
+++ b/configure.ac
@@@ -396,7 -396,7 +396,7 @@@ AC_CHECK_HEADERS(sys/sysctl.h, [], []
  AC_MSG_CHECKING([for sysctl kern.cp_times])
  if test -x /sbin/sysctl
  then
 -      /sbin/sysctl kern.cp_times 2>/dev/null
 +      /sbin/sysctl kern.cp_times >/dev/null 2>&1
        if test $? -eq 0
        then
                AC_MSG_RESULT([yes])
@@@ -3235,13 -3235,13 +3235,13 @@@ f
  
  # --with-libowcapi {{{
  with_libowcapi_cppflags=""
 -with_libowcapi_libs="-lowcapi"
 +with_libowcapi_ldflags=""
  AC_ARG_WITH(libowcapi, [AS_HELP_STRING([--with-libowcapi@<:@=PREFIX@:>@], [Path to libowcapi.])],
  [
        if test "x$withval" != "xno" && test "x$withval" != "xyes"
        then
                with_libowcapi_cppflags="-I$withval/include"
 -              with_libowcapi_libs="-L$withval/lib -lowcapi"
 +              with_libowcapi_ldflags="-L$withval/lib"
                with_libowcapi="yes"
        else
                with_libowcapi="$withval"
@@@ -3253,7 -3253,7 +3253,7 @@@
  if test "x$with_libowcapi" = "xyes"
  then
        SAVE_CPPFLAGS="$CPPFLAGS"
 -      CPPFLAGS="$with_libowcapi_cppflags"
 +      CPPFLAGS="$CPPFLAGS $with_libowcapi_cppflags"
  
        AC_CHECK_HEADERS(owcapi.h, [with_libowcapi="yes"], [with_libowcapi="no (owcapi.h not found)"])
  
@@@ -3263,7 -3263,7 +3263,7 @@@ if test "x$with_libowcapi" = "xyes
  then
        SAVE_LDFLAGS="$LDFLAGS"
        SAVE_CPPFLAGS="$CPPFLAGS"
 -      LDFLAGS="$with_libowcapi_libs"
 +      LDFLAGS="$LDFLAGS $with_libowcapi_ldflags"
        CPPFLAGS="$with_libowcapi_cppflags"
  
        AC_CHECK_LIB(owcapi, OW_get, [with_libowcapi="yes"], [with_libowcapi="no (libowcapi not found)"])
@@@ -3274,10 -3274,8 +3274,10 @@@ f
  if test "x$with_libowcapi" = "xyes"
  then
        BUILD_WITH_LIBOWCAPI_CPPFLAGS="$with_libowcapi_cppflags"
 -      BUILD_WITH_LIBOWCAPI_LIBS="$with_libowcapi_libs"
 +      BUILD_WITH_LIBOWCAPI_LDFLAGS="$with_libowcapi_ldflags"
 +      BUILD_WITH_LIBOWCAPI_LIBS="-lowcapi"
        AC_SUBST(BUILD_WITH_LIBOWCAPI_CPPFLAGS)
 +      AC_SUBST(BUILD_WITH_LIBOWCAPI_LDFLAGS)
        AC_SUBST(BUILD_WITH_LIBOWCAPI_LIBS)
  fi
  # }}}
@@@ -5127,8 -5125,11 +5127,8 @@@ AM_CONDITIONAL(BUILD_WITH_LIBATASMART, 
  
  PKG_CHECK_MODULES([LIBNOTIFY], [libnotify],
                [with_libnotify="yes"],
 -              [if test "x$LIBNOTIFY_PKG_ERRORS" = "x"; then
 -                       with_libnotify="no"
 -               else
 -                       with_libnotify="no ($LIBNOTIFY_PKG_ERRORS)"
 -               fi])
 +              [with_libnotify="no (pkg-config doesn't know libnotify)"]
 +)
  
  # Check for enabled/disabled features
  #
@@@ -5416,7 -5417,6 +5416,6 @@@ the
  fi
  
  # libi2c-dev
- with_libi2c="no"
  if test "x$ac_system" = "xLinux"
  then
  AC_CHECK_DECL(i2c_smbus_read_i2c_block_data,
@@@ -5424,6 -5424,8 +5423,8 @@@
        [with_libi2c="no (symbol i2c_smbus_read_i2c_block_data not found - have you installed libi2c-dev ?)"],
        [[#include <stdlib.h>
        #include <linux/i2c-dev.h>]])
+ else
+       with_libi2c="no (Linux only)"
  fi
  
  if test "x$with_libi2c" = "xyes"