dnl
dnl autoconf for Pacemaker
dnl
dnl License: GNU General Public License (GPL)

dnl ===============================================
dnl Bootstrap 
dnl ===============================================

dnl Initialiase, with sanity check of a unique file in the hierarchy
AC_INIT(configure.in)
AC_PREREQ(2.53)

AC_CONFIG_AUX_DIR(.)
AC_CANONICAL_HOST
AC_MSG_NOTICE(Host: $host)
AC_MSG_NOTICE(Host OS: $host_os)
AC_MSG_NOTICE(Host CPU: $host_cpu)
AC_MSG_NOTICE(Host Vendor: $host_vendor)

dnl Where #defines go (e.g. `AC_CHECK_HEADERS' below)
dnl
dnl Internal header: include/corosync/config.h
dnl   - Contains ALL defines
dnl   - include/config.h.in is generated automatically by autoheader
dnl   - NOT to be included in any header files except lha_internal.h
dnl     (which is also not to be included in any other header files)
dnl
dnl External header: include/corosync/cs_config.h
dnl   - Contains a subset of defines checked here
dnl   - Manually edit include/corosync/cs_config.h.in to have configure include
dnl     new defines
dnl   - Should not include HAVE_* defines
dnl   - Safe to include anywhere
AM_CONFIG_HEADER(include/corosync/config.h include/corosync/cs_config.h)
ALL_LINGUAS="en fr"

AC_ARG_WITH(version,
    [  --with-version=name     Override package version (if you're a packager needing to pretend) ],
    [ CS_VERSION="$withval" ],
    [ CS_VERSION="" ],
)

DTD_VERSION=1.0

if test -z "$CS_VERSION" ; then
   CS_VERSION="1.0.0"
fi

PKG_NAME=corosync
PKG_FEATURES=""
AM_INIT_AUTOMAKE($PKG_NAME, $CS_VERSION)
AC_DEFINE_UNQUOTED(CS_VERSION, "$CS_VERSION", Current pacemaker version)
AC_SUBST(PKG_NAME)


LDD=ldd
dnl Which C compiler?
dnl Defaults to GNU C compiler if available.
dnl Always tries to set the compiler to ANSI C via options (AM)
dnl Can force other with environment variable "CC".
AC_PROG_CC
AC_PROG_CC_STDC
AM_PROG_CC_C_O
AC_PROG_RANLIB

dnl ===============================================
dnl Helpers 
dnl ===============================================
cc_supports_flag() {
	  AC_MSG_CHECKING(whether $CC supports "$@")
	  Cfile=/tmp/foo${$}
	  touch ${Cfile}.c
	  $CC -c "$@" ${Cfile}.c -o ${Cfile}.o >/dev/null 2>&1
          rc=$?
	  rm -f ${Cfile}.c ${Cfile}.o
          case $rc in
            0) AC_MSG_RESULT(yes);;
            *) AC_MSG_RESULT(no);;
          esac
          return $rc
}

extract_header_define() {
	  AC_MSG_CHECKING(for $2 in $1)
	  Cfile=/tmp/extract_define.$2.${$}
	  printf "#include <stdio.h>\n" > ${Cfile}.c
	  printf "#include <%s>\n" $1 >> ${Cfile}.c
	  printf "int main(int argc, char **argv) { printf(\"%%s\", %s); return 0; }\n" $2 >> ${Cfile}.c
	  $CC $CFLAGS ${Cfile}.c -o ${Cfile}
	  value=`${Cfile}`
	  AC_MSG_RESULT($value)
	  printf $value
	  rm -f ${Cfile}.c ${Cfile}
	}

check_for_type() {
  type="$1"
  headers=""
  shift
  for arg
  do
    headers="${headers}${arg}
"
  done
  program="if ((${type} *) 0)  return 0;
    if (sizeof(${type}))  return 0; 
    return 0;"
  have="HAVE_`echo "$type" | tr ' ' '_' | dd conv=ucase 2>/dev/null`"
  varhave="heartbeat_cv_$have"

  AC_CACHE_CHECK([for type $type ],$varhave,[
    AC_TRY_COMPILE([$headers], [$program], eval $varhave=yes, eval $varhave=no
    , eval $varhave=cross)
  ])
  if test x"`eval echo '${'$varhave'}'`" = xyes; then
    return 0
  fi
  return 1
}

check_for_type_member() {
  type="$1"
  member="$2"
  headers=""
  shift
  shift
  for arg
  do
    headers="${headers}${arg}
"
  done
  program="${type} foo;
    if ((${type} *) 0)  return 0;
    if (sizeof(${type}))  return 0;
    if (sizeof(foo))  return 0;
    (void*)foo.${member};
    return 0;"
  have="HAVE_`echo "$type" | tr ' ' '_' | dd conv=ucase 2>/dev/null`"
  varhave="heartbeat_cv_$have"

  AC_CACHE_CHECK([for type $type ],$varhave,[
    AC_TRY_COMPILE([$headers], [$program], eval $varhave=yes, eval $varhave=no
    , eval $varhave=cross)
  ])
  if test x"`eval echo '${'$varhave'}'`" = xyes; then
    return 0
  fi
  return 1
}

dnl ===============================================
dnl Configure Options
dnl ===============================================

AC_ARG_ENABLE([ansi],
[  --enable-ansi force GCC to compile to ANSI/ANSI standard for older compilers.
     [default=no]])

AC_ARG_ENABLE([fatal-warnings],
[  --enable-fatal-warnings very pedantic and fatal warnings for gcc
     [default=no]])

AC_ARG_WITH(lcrso-dir, 
    [  --with-lcrso-dir=DIR   Corosync lcrso files. ],
    [ LCRSODIR="$withval" ])

AC_ARG_ENABLE(static, 
    [  --enable-static   Dont produce dynamic libraries. ],
    [ default="no" ])

AC_ARG_ENABLE(coverage, 
    [  --enable-coverage   Coverage analysis of the codebase. ],
    [ default="no" ])

dnl ===============================================
dnl General Processing
dnl ===============================================

CC_IN_CONFIGURE=yes
export CC_IN_CONFIGURE

AC_MSG_NOTICE(Sanitizing prefix: ${prefix})
case $prefix in
  NONE)	prefix=/usr;;
esac

AC_MSG_NOTICE(Sanitizing exec_prefix: ${exec_prefix})
case $exec_prefix in
  dnl For consistency with Heartbeat, map NONE->$prefix
  NONE)	  exec_prefix=$prefix;;
  prefix) exec_prefix=$prefix;;
esac

AC_MSG_NOTICE(Sanitizing ais_prefix: ${AISPREFIX})
case $AISPREFIX in
  dnl For consistency with Heartbeat, map NONE->$prefix
  NONE)	  AISPREFIX=$prefix;;
  prefix) AISPREFIX=$prefix;;
esac

AC_MSG_NOTICE(Sanitizing libdir: ${libdir})
case $libdir in
  dnl For consistency with Heartbeat, map NONE->$prefix
  prefix|NONE|*exec_prefix*)
    AC_MSG_CHECKING(which lib directory to use)
    for aDir in lib64 lib
    do
      trydir="${exec_prefix}/${aDir}"
      if
        test -d ${trydir}
      then
        libdir=${trydir}
        break
      fi
    done
    AC_MSG_RESULT($libdir);
    ;;
esac


dnl Expand autoconf variables so that we dont end up with '${prefix}' 
dnl in #defines and python scripts
dnl NOTE: Autoconf deliberately leaves them unexpanded to allow
dnl    make exec_prefix=/foo install
dnl No longer being able to do this seems like no great loss to me...

eval prefix="`eval echo ${prefix}`"
eval exec_prefix="`eval echo ${exec_prefix}`"
eval bindir="`eval echo ${bindir}`"
eval sbindir="`eval echo ${sbindir}`"
eval libexecdir="`eval echo ${libexecdir}`"
eval datadir="`eval echo ${datadir}`"
eval sysconfdir="`eval echo ${sysconfdir}`"
eval sharedstatedir="`eval echo ${sharedstatedir}`"
eval localstatedir="`eval echo ${localstatedir}`"
eval libdir="`eval echo ${libdir}`"
eval includedir="`eval echo ${includedir}`"
eval oldincludedir="`eval echo ${oldincludedir}`"
eval infodir="`eval echo ${infodir}`"
eval mandir="`eval echo ${mandir}`"
eval docdir="`eval echo ${docdir}`"

for j in prefix exec_prefix bindir sbindir libexecdir datadir sysconfdir \
    sharedstatedir localstatedir libdir includedir oldincludedir infodir \
    mandir docdir
do 
  dirname=`eval echo '${'${j}'}'`
  if
    test ! -d "$dirname"
  then
    AC_MSG_WARN([$j directory ($dirname) does not exist!])
  fi
done

dnl This OS-based decision-making is poor autotools practice;
dnl feature-based mechanisms are strongly preferred.
dnl
dnl So keep this section to a bare minimum; regard as a "necessary evil". 

ON_DARWIN=0
DYFLAGS=
case "$host_os" in
*bsd*)		LIBS="-L/usr/local/lib"
		CPPFLAGS="$CPPFLAGS -I/usr/local/include"
		AC_DEFINE_UNQUOTED(COROSYNC_BSD, 1, Compiling for BSD platform)
		DYFLAGS="$DYFLAGS -export-dynamic"
		;;
*solaris*)
		AC_DEFINE_UNQUOTED(COROSYNC_SOLARIS, 1, Compiling for Solaris platform)
		AC_DEFINE_UNQUOTED(TS_CLASS, 1, Prevent being scheduled RR)
		CFLAGS="$CFLAGS -D_REENTRANT"
		LDFLAGS="$LDFLAGS -Wl,--export-dynamic -Wl,-rpath-link=/usr/lib"
		;;
*linux*)	
		AC_DEFINE_UNQUOTED(COROSYNC_LINUX, 1, Compiling for Linux platform)
		DYFLAGS="$DYFLAGS -rdynamic"
 		;;
darwin*)	
		ON_DARWIN=1
		AC_DEFINE_UNQUOTED(COROSYNC_DARWIN, 1, Compiling for Darwin platform)
#  		LIBS="$LIBS -L${prefix}/lib"
#  		CFLAGS="$CFLAGS -I${prefix}/include"
		;;
esac
AC_SUBST(DYFLAGS)

case "$host_cpu" in
  ppc64|powerpc64)
    case $CFLAGS in
     *powerpc64*)			;;
     *)	if test "$GCC" = yes; then
	  CFLAGS="$CFLAGS -m64"
	fi				;;
    esac
esac

AC_MSG_CHECKING(which format is needed to print uint64_t)
case "$host_cpu" in
  s390x)U64T="%lu";;
  *64*) U64T="%lu";;
  *)    U64T="%llu";;
esac
AC_MSG_RESULT($U64T)
AC_DEFINE_UNQUOTED(U64T, "$U64T", Correct printf format for logging uint64_t)

dnl Variables needed for substitution

case x$LCRSODIR in
     x) LCRSODIR=$libexecdir/corosync/lcrso;;
esac
AC_DEFINE_UNQUOTED(LCRSODIR, "$LCRSODIR", Location of Corosync lcrso plugins)
AC_SUBST(LCRSODIR)


dnl *************************************************************************
PATH="$PATH:/sbin:/usr/sbin:/usr/local/sbin:/usr/local/bin"
export PATH

dnl ===============================================
dnl Program Paths - Most of these need to go away
dnl ===============================================


AC_CHECK_PROGS(MAKE, gmake make)
AC_PATH_PROGS(PKGCONFIG, pkg-config)
AC_PATH_PROGS(SSH, ssh, /usr/bin/ssh)

if test x"${MAKE}" = x""; then
   AC_MSG_ERROR(You need (g)make installed in order to build ${PKG_NAME})
fi

AC_SUBST(MAKE)
AC_SUBST(CC)

dnl ===============================================
dnl Libraries
dnl ===============================================

AC_CHECK_LIB(dl, dlopen)
AC_CHECK_LIB(nsl, t_open)
AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(c, getpeereid)
AC_CHECK_LIB(rt, sched_getscheduler)
AC_CHECK_LIB(pthread, pthread_create)

dnl if test x"${PKGCONFIG}" = x""; then
dnl    AC_MSG_ERROR(You need pkgconfig installed in order to build ${PKG_NAME})
dnl fi
dnl
dnl if test $PKGCONFIG --exists $GPKGNAME; then
dnl 	CFLAGS="$CFLAGS `$GLIBCONFIG --cflags`"
dnl 	LIBS="$LIBS `$GLIBCONFIG --libs`"
dnl fi

dnl ===============================================
dnl Functions
dnl ===============================================
AC_CHECK_FUNCS(alphasort)
AC_CHECK_FUNCS(scandir)
AC_CHECK_FUNCS(getpeerucred)

dnl ===============================================
dnl Headers
dnl ===============================================

AC_HEADER_STDC

AC_CHECK_HEADERS(sys/sockio.h)
AC_CHECK_HEADERS(sys/types.h)
AC_CHECK_HEADERS(sys/socket.h)
AC_CHECK_HEADERS(malloc.h)
AC_CHECK_HEADERS(getopt.h)

dnl ===============================================
dnl Typedefs
dnl ===============================================

dnl Check syslog.h for 'facilitynames' table
dnl
AC_CACHE_CHECK([for facilitynames in syslog.h],ac_cv_HAVE_SYSLOG_FACILITYNAMES,[
AC_TRY_COMPILE([
#define SYSLOG_NAMES
#include <stdlib.h>
#include <syslog.h>
],
[ void *fnames; fnames = facilitynames; ],
ac_cv_HAVE_SYSLOG_FACILITYNAMES=yes,ac_cv_HAVE_SYSLOG_FACILITYNAMES=no,ac_cv_HAVE_SYSLOG_FACILITYNAMES=cross)])
if test x"$ac_cv_HAVE_SYSLOG_FACILITYNAMES" = x"yes"; then
    AC_DEFINE(HAVE_SYSLOG_FACILITYNAMES,1,[ ])
fi

dnl ===============================================
dnl Compiler Characteristics
dnl ===============================================

dnl if not known on this system, #define size_t unsigned
AC_TYPE_SIZE_T
AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_C_STRINGIZE

CC_WARNINGS=""

dnl AC_CHECK_FUNCS(fcntl)

dnl
dnl Make sure that CFLAGS is not exported. If the user did
dnl not have CFLAGS in their environment then this should have
dnl no effect. However if CFLAGS was exported from the user's
dnl environment, then the new CFLAGS will also be exported
dnl to sub processes. 
dnl

if export | fgrep " CFLAGS=" > /dev/null; then
	export -n CFLAGS || true # We don't want to bomb out if this fails
fi

if test "$GCC" != yes; then
        CFLAGS="$CFLAGS -g"
else
        CFLAGS="$CFLAGS -ggdb3"

	EXTRA_WARNINGS=""
	# We had to eliminate -Wnested-externs because of libtool changes
        WARNLIST="all missing-prototypes 
		missing-declarations 
		strict-prototypes 
		declaration-after-statement
		pointer-arith 
		write-strings
		cast-qual cast-align 
		bad-function-cast 
		missing-format-attribute
		format=2
		format-security
		format-nonliteral
		no-long-long
    		unsigned-char
		gnu89-inline
		no-strict-aliasing"

	for j in $WARNLIST
	do
	  if
	    cc_supports_flag -W$j
	  then
	    EXTRA_WARNINGS="$EXTRA_WARNINGS -W$j"
	  fi
	done

dnl Add any system specific options here.

	case "$host_os" in
  	*linux*|*bsd*)
		if test "${enable_fatal_warnings}" = "unknown"; then
        		enable_fatal_warnings=yes
        	fi
          	;;
  	*solaris*)
          	;;
	esac

	if test "x${enable_coverage}" = xyes && cc_supports_flag -ftest-coverage && cc_supports_flag -fprofile-arcs ; then
	   echo "Enabling Coverage"
	   CFLAGS="$CFLAGS -O0 -g -ftest-coverage -fprofile-arcs"
	   LDFLAGS="$LDFLAGS -g -ftest-coverage -fprofile-arcs"
	   enable_static=yes
	   PKG_FEATURES="$PKG_FEATURES coverage"
	fi

	if test "x${enable_ansi}" = xyes && cc_supports_flag -std=iso9899:199409 ; then
	  echo "Enabling ANSI Compatibility"
	  ANSI="-ansi -D_GNU_SOURCE -DANSI_ONLY"
	  PKG_FEATURES="$PKG_FEATURES ansi"
	fi

	if test "x${enable_fatal_warnings}" = xyes && cc_supports_flag -Werror ; then
          echo "Enabling Fatal Warnings (-Werror)"
    	  FATAL_WARNINGS="-Werror"
	  PKG_FEATURES="$PKG_FEATURES fatal-warnings"
        fi
        
	CC_WARNINGS="$EXTRA_WARNINGS $FATAL_WARNINGS $ANSI" 
	NON_FATAL_CC_WARNINGS="$EXTRA_WARNINGS"

fi
dnl AC_SUBST(CC_WARNINGS)

NON_FATAL_CFLAGS="$CFLAGS $NON_FATAL_CC_WARNINGS"
AC_SUBST(NON_FATAL_CFLAGS)

dnl
dnl We reset CFLAGS to include our warnings *after* all function
dnl checking goes on, so that our warning flags don't keep the
dnl AC_*FUNCS() calls above from working.  In particular, -Werror will
dnl *always* cause us troubles if we set it before here.
dnl
dnl
CFLAGS="$CFLAGS $CC_WARNINGS"
AC_SUBST(CFLAGS)

dnl This is useful for use in Makefiles that need to remove one specific flag
CFLAGS_COPY="$CFLAGS"
AC_SUBST(CFLAGS_COPY)

AM_CONDITIONAL(BUILD_DARWIN, test $ON_DARWIN = 1)
AM_CONDITIONAL(BUILD_DYNAMIC, test "x${enable_static}" != xyes)

if test "x${enable_static}" != xyes; then
   PKG_FEATURES="$PKG_FEATURES static"
fi

LINT_FLAGS="-weak -unrecog +posixlib +ignoresigns -fcnuse -badflag -D__gnuc_va_list=va_list -D__attribute\(x\)="
AC_SUBST(LINT_FLAGS)

dnl ************************************************************************
AC_SUBST(LOCALE)


dnl The Makefiles and shell scripts we output
AC_CONFIG_FILES(Makefile				        \
include/Makefile						\
lib/Makefile							\
lcr/Makefile							\
exec/Makefile							\
test/Makefile							\
tools/Makefile							\
services/Makefile						\
		)

dnl Now process the entire list of files added by previous 
dnl  calls to AC_CONFIG_FILES()
AC_OUTPUT()

dnl *****************
dnl Configure summary
dnl *****************

AC_MSG_RESULT([])
AC_MSG_RESULT([$PACKAGE configuration:])
AC_MSG_RESULT([  Version                  = ${VERSION}])

AC_MSG_RESULT([  Prefix                   = ${prefix}])
AC_MSG_RESULT([  Executables              = ${sbindir}])
AC_MSG_RESULT([  Man pages                = ${mandir}])
AC_MSG_RESULT([  Libraries                = ${libdir}])
AC_MSG_RESULT([  Header files             = ${includedir}])
AC_MSG_RESULT([  Arch-independent files   = ${datadir}])
AC_MSG_RESULT([  State information        = ${localstatedir}])
AC_MSG_RESULT([  System configuration     = ${sysconfdir}])

AC_MSG_RESULT([  Features                 =${PKG_FEATURES}])

AC_MSG_RESULT([  CC_WARNINGS              = ${CC_WARNINGS}])
AC_MSG_RESULT([  Mangled CFLAGS           = ${CFLAGS}])
AC_MSG_RESULT([  Libraries                = ${LIBS}])