git.m6w6.name Git - awesomized/libmemcached/blob - m4/check_gcc_version.m4

   1 AC_DEFUN([FORCE_MAC_GCC42],
   2   [AS_IF([test "$GCC" = "yes"],[
   3     dnl If you're on a Mac, and you didn't ask for a specific compiler
   4     dnl You're gonna get 4.2.
   5     AS_IF([test "$host_vendor" = "apple" -a "x${ac_cv_env_CC_set}" = "x"],[
   6       AS_IF([test -f /usr/bin/gcc-4.2],
   7         [
   8           CPP="/usr/bin/gcc-4.2 -E"
   9           CC=/usr/bin/gcc-4.2
  10           CXX=/usr/bin/g++-4.2
  11         ])
  12     ])
  13   ])
  14 ])
  15
  16 AC_DEFUN([CHECK_GCC_VERSION],[
  17   AC_REQUIRE([FORCE_MAC_GCC42])
  18   AC_CACHE_CHECK([if GCC is recent enough], [ac_cv_gcc_recent],
  19     [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  20 #if !defined(__GNUC__) || (__GNUC__ < 4) || ((__GNUC__ >= 4) && (__GNUC_MINOR__ < 1))
  21 # error GCC is Too Old!
  22 #endif
  23       ]])],
  24       [ac_cv_gcc_recent=yes],
  25       [ac_cv_gcc_recent=no])])
  26   AS_IF([test "$ac_cv_gcc_recent" = "no" -a "$host_vendor" = "apple"],
  27     AC_MSG_ERROR([Your version of GCC is too old. At least version 4.2 is required on OSX. You may need to install a version of XCode >= 3.1.2]))
  28   AS_IF([test "$drizzle_cv_gcc_recent" = "no"],
  29     AC_MSG_ERROR([Your version of GCC is too old. At least version 4.1 is required]))
  30 ])