AC_PREREQ(2.52)
AC_INIT(memcached, 1.3.1, brad@danga.com)
AC_CANONICAL_SYSTEM
AC_CONFIG_SRCDIR(memcached.c)
AM_INIT_AUTOMAKE(AC_PACKAGE_NAME, AC_PACKAGE_VERSION)
AM_CONFIG_HEADER(config.h)

AC_PROG_CC

dnl **********************************************************************
dnl DETECT_ICC ([ACTION-IF-YES], [ACTION-IF-NO])
dnl
dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES
dnl sets the $ICC variable to "yes" or "no"
dnl **********************************************************************
AC_DEFUN([DETECT_ICC],
[
    ICC="no"
    AC_MSG_CHECKING([for icc in use])
    if test "$GCC" = "yes"; then
       dnl check if this is icc acting as gcc in disguise
       AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER],
         AC_MSG_RESULT([no])
         [$2]
         ICC="no",
         AC_MSG_RESULT([yes])
         [$1]
         ICC="yes")
    fi
])

DETECT_ICC([], [])

if test "$ICC" = "no"; then
   AC_PROG_CC_C99
fi

AM_PROG_CC_C_O
AC_PROG_INSTALL

AC_ARG_ENABLE(dtrace,
  [AS_HELP_STRING([--enable-dtrace],[Enable dtrace probes])])
if test "x$enable_dtrace" == "xyes"; then
  AC_PATH_PROG([DTRACE], [dtrace], "no", [/usr/sbin:$PATH])
  if test "x$DTRACE" != "xno"; then
    AC_DEFINE([ENABLE_DTRACE],1,[Set to nonzero if you want to include DTRACE])
    DTRACE_HEADER=memcached_dtrace.h

    # DTrace on MacOSX does not use -G option
    $DTRACE -G -o conftest.$$ -s memcached_dtrace.d 2>/dev/zero
    if test $? -eq 0
    then
        DTRACE_OBJ=memcached_dtrace.o
        DTRACE_DEBUG_OBJ=memcached_debug_dtrace.o
        rm conftest.$$
     fi
  else
    AC_MSG_ERROR([Need dtrace binary and OS support.])
  fi
fi

AC_SUBST(DTRACE)
AC_SUBST(DTRACE_HEADER)
AC_SUBST(DTRACE_OBJ)
AC_SUBST(DTRACE_DEBUG_OBJ)
AC_SUBST(DTRACEFLAGS)
AC_SUBST(PROFILER_LDFLAGS)

if test "$ICC" = "yes"
then
   :
   dnl ICC trying to be gcc, but not well
elif test "$GCC" = "yes"
then
   AC_PATH_PROG([PROFILER], [gcov], "no", [$PATH])
   if test "x$PROFILER" != "xno"; then
      PROFILER_FLAGS="-fprofile-arcs -ftest-coverage"
      PROFILER_LDFLAGS="-lgcov"
   fi
else
   AC_RUN_IFELSE(
      [AC_LANG_PROGRAM([], [dnl
#ifdef __SUNPRO_C
   return 0;
#else
   return 1;
#endif
      ])
    ],[
       AC_PATH_PROG([PROFILER], [tcov], "no", [$PATH])
       if test "x$PROFILER" != "xno"; then
          PROFILER_FLAGS=-xprofile=tcov
       fi
    ])
fi

AC_SUBST(PROFILER_FLAGS)


AC_ARG_ENABLE(64bit,
  [AS_HELP_STRING([--enable-64bit],[build 64bit version])])
if test "x$enable_64bit" == "xyes"
then
    org_cflags=$CFLAGS
    CFLAGS=-m64
    AC_RUN_IFELSE(
      [AC_LANG_PROGRAM([], [dnl
return sizeof(void*) == 8 ? 0 : 1;
      ])
    ],[
      CFLAGS="-m64 $org_cflags"
    ],[
    AC_MSG_ERROR([Don't know how to build a 64-bit object.])
    ])
fi

trylibeventdir=""
AC_ARG_WITH(libevent,
       [  --with-libevent=PATH     Specify path to libevent installation ],
       [
                if test "x$withval" != "xno" ; then
                        trylibeventdir=$withval
                fi
       ]
)

dnl ------------------------------------------------------
dnl libevent detection.  swiped from Tor.  modified a bit.

LIBEVENT_URL=http://www.monkey.org/~provos/libevent/

AC_CACHE_CHECK([for libevent directory], ac_cv_libevent_dir, [
  saved_LIBS="$LIBS"
  saved_LDFLAGS="$LDFLAGS"
  saved_CPPFLAGS="$CPPFLAGS"
  le_found=no
  for ledir in $trylibeventdir "" $prefix /usr/local ; do
    LDFLAGS="$saved_LDFLAGS"
    LIBS="$saved_LIBS -levent"

    # Skip the directory if it isn't there.
    if test ! -z "$ledir" -a ! -d "$ledir" ; then
       continue;
    fi
    if test ! -z "$ledir" ; then
      if test -d "$ledir/lib" ; then
        LDFLAGS="-L$ledir/lib $LDFLAGS"
      else
        LDFLAGS="-L$ledir $LDFLAGS"
      fi
      if test -d "$ledir/include" ; then
        CPPFLAGS="-I$ledir/include $CPPFLAGS"
      else
        CPPFLAGS="-I$ledir $CPPFLAGS"
      fi
    fi
    # Can I compile and link it?
    AC_TRY_LINK([#include <sys/time.h>
#include <sys/types.h>
#include <event.h>], [ event_init(); ],
       [ libevent_linked=yes ], [ libevent_linked=no ])
    if test $libevent_linked = yes; then
       if test ! -z "$ledir" ; then
         ac_cv_libevent_dir=$ledir
       else
         ac_cv_libevent_dir="(system)"
       fi
       le_found=yes
       break
    fi
  done
  LIBS="$saved_LIBS"
  LDFLAGS="$saved_LDFLAGS"
  CPPFLAGS="$saved_CPPFLAGS"
  if test $le_found = no ; then
    AC_MSG_ERROR([libevent is required.  You can get it from $LIBEVENT_URL

      If it's already installed, specify its path using --with-libevent=/dir/
])
  fi
])
LIBS="$LIBS -levent"
if test $ac_cv_libevent_dir != "(system)"; then
  if test -d "$ac_cv_libevent_dir/lib" ; then
    LDFLAGS="-L$ac_cv_libevent_dir/lib $LDFLAGS"
    le_libdir="$ac_cv_libevent_dir/lib"
  else
    LDFLAGS="-L$ac_cv_libevent_dir $LDFLAGS"
    le_libdir="$ac_cv_libevent_dir"
  fi
  if test -d "$ac_cv_libevent_dir/include" ; then
    CPPFLAGS="-I$ac_cv_libevent_dir/include $CPPFLAGS"
  else
    CPPFLAGS="-I$ac_cv_libevent_dir $CPPFLAGS"
  fi
fi

dnl ----------------------------------------------------------------------------

AC_SEARCH_LIBS(socket, socket)
AC_SEARCH_LIBS(gethostbyname, nsl)
AC_SEARCH_LIBS(umem_cache_create, umem)

AC_HEADER_STDBOOL
AC_C_CONST

dnl From licq: Copyright (c) 2000 Dirk Mueller
dnl Check if the type socklen_t is defined anywhere
AC_DEFUN([AC_C_SOCKLEN_T],
[AC_CACHE_CHECK(for socklen_t, ac_cv_c_socklen_t,
[
  AC_TRY_COMPILE([
    #include <sys/types.h>
    #include <sys/socket.h>
  ],[
    socklen_t foo;
  ],[
    ac_cv_c_socklen_t=yes
  ],[
    ac_cv_c_socklen_t=no
  ])
])
if test $ac_cv_c_socklen_t = no; then
  AC_DEFINE(socklen_t, int, [define to int if socklen_t not available])
fi
])

AC_C_SOCKLEN_T

dnl Check if we're a little-endian or a big-endian system, needed by hash code
AC_DEFUN([AC_C_ENDIAN],
[AC_CACHE_CHECK(for endianness, ac_cv_c_endian,
[
  AC_RUN_IFELSE(
    [AC_LANG_PROGRAM([], [dnl
        long val = 1;
        char *c = (char *) &val;
        exit(*c == 1);
    ])
  ],[
    ac_cv_c_endian=big
  ],[
    ac_cv_c_endian=little
  ])
])
if test $ac_cv_c_endian = big; then
  AC_DEFINE(ENDIAN_BIG, 1, [machine is bigendian])
fi
if test $ac_cv_c_endian = little; then
  AC_DEFINE(ENDIAN_LITTLE, 1, [machine is littleendian])
fi
])

AC_C_ENDIAN

dnl Check whether the user's system supports pthread
AC_SEARCH_LIBS(pthread_create, pthread)
if test "x$ac_cv_search_pthread_create" != "xno"; then
  dnl Sun compilers need the -mt flag!
  AC_RUN_IFELSE(
    [AC_LANG_PROGRAM([], [dnl
#ifdef __SUNPRO_C
 return 0;
#else
 return 1;
#endif
    ])
  ],[
    CFLAGS="-mt $CFLAGS"
    SUNSTUDIO=true
  ])
else
  AC_MSG_ERROR([Can't enable threads without the POSIX thread library.])
fi

AC_CHECK_FUNCS(mlockall)
AC_CHECK_FUNCS(getpagesizes)
AC_CHECK_FUNCS(memcntl)

AC_DEFUN([AC_C_ALIGNMENT],
[AC_CACHE_CHECK(for alignment, ac_cv_c_alignment,
[
  AC_RUN_IFELSE(
    [AC_LANG_PROGRAM([
#include <stdlib.h>
#include <inttypes.h>
    ], [
       char *buf = malloc(32);
       uint64_t *ptr = (uint64_t*)(buf+2);
       *ptr = 0x1;
       return 0;
    ])
  ],[
    ac_cv_c_alignment=none
  ],[
    ac_cv_c_endian=need
  ])
])
if test $ac_cv_c_endian = need; then
  AC_DEFINE(NEED_ALIGN, 1, [Machine need alignment])
fi
])

AC_C_ALIGNMENT

dnl Let the compiler be a bit more picky. Please note that you cannot
dnl specify these flags to the compiler before AC_CHECK_FUNCS, because
dnl the test program will generate a compilation warning and hence fail
dnl to detect the function ;-)
if test "$ICC" = "yes"
then
   dnl ICC trying to be gcc.
   CFLAGS="$CFLAGS -diag-disable 187 -Wall -Werror"
elif test "$GCC" = "yes"
then
  CFLAGS="$CFLAGS -Wall -Werror -pedantic -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls"
elif test "$SUNSTUDIO" = "true"
then
  CFLAGS="$CFLAGS -errfmt=error -errwarn -errshort=tags"
fi

AC_CONFIG_FILES(Makefile doc/Makefile)
AC_OUTPUT