git.m6w6.name Git - m6w6/libmemcached/blob - m4/pandora_ensure_gcc_version.m4

   1 dnl  Copyright (C) 2009 Sun Microsystems
   2 dnl This file is free software; Sun Microsystems
   3 dnl gives unlimited permission to copy and/or distribute it,
   4 dnl with or without modifications, as long as this notice is preserved.
   5
   6 dnl If the user is on a Mac and didn't ask for a specific compiler
   7 dnl You're gonna get 4.2.
   8 AC_DEFUN([PANDORA_MAC_GCC42],
   9   [AS_IF([test "$GCC" = "yes"],[
  10     AS_IF([test "$host_vendor" = "apple" -a "x${ac_cv_env_CC_set}" = "x"],[
  11       host_os_version=`echo ${host_os} | perl -ple 's/^\D+//g;s,\..*,,'`
  12       AS_IF([test "$host_os_version" -lt 10],[
  13         AS_IF([test -f /usr/bin/gcc-4.2],
  14         [
  15           CPP="/usr/bin/gcc-4.2 -E"
  16           CC=/usr/bin/gcc-4.2
  17           CXX=/usr/bin/g++-4.2
  18         ])
  19       ])
  20     ])
  21   ])
  22 ])
  23
  24 dnl
  25 AC_DEFUN([PANDORA_ENSURE_GCC_VERSION],[
  26   AC_REQUIRE([PANDORA_MAC_GCC42])
  27   AC_CACHE_CHECK([if GCC is recent enough], [ac_cv_gcc_recent],
  28     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  29 #if !defined(__GNUC__) || (__GNUC__ < 4) || ((__GNUC__ >= 4) && (__GNUC_MINOR__ < 1))
  30 # error GCC is Too Old!
  31 #endif
  32       ]])],
  33       [ac_cv_gcc_recent=yes],
  34       [ac_cv_gcc_recent=no])])
  35   AS_IF([test "$ac_cv_gcc_recent" = "no" -a "$host_vendor" = "apple"],
  36     AC_MSG_ERROR([Your version of GCC is too old. At least version 4.2 is required on OSX. You may need to install a version of XCode >= 3.1.2]))
  37   AS_IF([test "$ac_cv_gcc_recent" = "no"],
  38     AC_MSG_ERROR([Your version of GCC is too old. At least version 4.1 is required]))
  39 ])