~drizzle-trunk/drizzle/development

dnl  Copyright (C) 2009 Sun Microsystems

dnl This file is free software; Sun Microsystems

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([_PANDORA_TRY_GCC],[

  pushdef([Name],[translit([$1],[./-], [___])])

  pushdef([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],

                                [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])

  AC_CHECK_PROGS([CC]NAME,[gcc$1])

  AC_CHECK_PROGS([CXX]NAME,[g++$1])

  AS_IF([test "x${CC]NAME[}" != "x" -a "x${ac_cv_env_CC_set}" = "x"],

    [CC="${CC]NAME[}"])

  AS_IF([test "x${CXX]NAME[}" != "x" -a "x${ac_cv_env_CCX_set}" = "x"],

    [CXX="${CXX]NAME[}"])

  AS_IF([test "x${CC]NAME[}" != "x" -a "x${ac_cv_env_CPP_set}" = "x"],

    [CPP="${CC]NAME[} -E"])

])

dnl If the user is on a Mac and didn't ask for a specific compiler

dnl You're gonna get 4.2.

AC_DEFUN([PANDORA_MAC_GCC42],

  [AS_IF([test "$GCC" = "yes"],[

    AS_IF([test "$host_vendor" = "apple" -a "x${ac_cv_env_CC_set}" = "x"],[

      host_os_version=`echo ${host_os} | perl -ple 's/^\D+//g;s,\..*,,'`

      AS_IF([test "$host_os_version" -lt 10],[

        _PANDORA_TRY_GCC([-4.2])

      ])

    ])

  ])

])

dnl If the user is on CentOS or RHEL and didn't ask for a specific compiler

dnl You're gonna get 4.4 (forward compatible with 4.5)

AC_DEFUN([PANDORA_RH_GCC44],

  [AS_IF([test "$GCC" = "yes"],[

    AS_IF([test "x${ac_cv_env_CC_set}" = "x"],[

      _PANDORA_TRY_GCC([44])

      _PANDORA_TRY_GCC([45])

    ])

  ])

])

dnl 

AC_DEFUN([PANDORA_ENSURE_GCC_VERSION],[

  AC_REQUIRE([PANDORA_MAC_GCC42])

  AC_REQUIRE([PANDORA_RH_GCC44])

  AS_IF([test "$GCC" = "yes"],[

    AC_CACHE_CHECK([if GCC is recent enough], [ac_cv_gcc_recent],

      [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

#if !defined(__GNUC__) || (__GNUC__ < 4) || ((__GNUC__ >= 4) && (__GNUC_MINOR__ < 2))

# error GCC is Too Old!

#endif

        ]])],

        [ac_cv_gcc_recent=yes],

        [ac_cv_gcc_recent=no])])

    AS_IF([test "$ac_cv_gcc_recent" = "no" -a "$host_vendor" = "apple"],

      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]))

    AS_IF([test "$ac_cv_gcc_recent" = "no"],

      AC_MSG_ERROR([Your version of GCC is too old. At least version 4.2 is required. On RHEL/CentOS systems this is found in the gcc44 and gcc44-c++ packages.]))

  ])

])