#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

# bootstrap / init
AC_PREREQ([2.61])

AC_INIT([corosync], [trunk], [openais@lists.osdl.org])
AM_INIT_AUTOMAKE

AC_CONFIG_SRCDIR([lib/coroipcc.c])
AC_CONFIG_HEADER([include/corosync/config.h include/corosync/cs_config.h])

AC_CANONICAL_HOST

AC_LANG([C])

# Checks for programs.

# check stolen from gnulib/m4/gnu-make.m4
if ! ${MAKE-make} --version /cannot/make/this >/dev/null 2>&1; then
	AC_MSG_ERROR([you don't seem to have GNU make; it is required])
fi

AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_CHECK_PROGS([GROFF], [groff])

# Checks for libraries.
AC_CHECK_LIB([dl], [dlopen])
AC_CHECK_LIB([pthread], [pthread_create])
AC_CHECK_LIB([c], [getpeereid])
AC_CHECK_LIB([socket], [socket])
AC_CHECK_LIB([nsl], [t_open])
AC_CHECK_LIB([rt], [sched_getscheduler])

# Checks for header files.
AC_FUNC_ALLOCA
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS([arpa/inet.h fcntl.h limits.h netdb.h netinet/in.h stdint.h \
		  stdlib.h string.h sys/ioctl.h sys/param.h sys/socket.h \
		  sys/time.h syslog.h unistd.h sys/types.h getopt.h malloc.h \
		  sys/sockio.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_UID_T
AC_C_INLINE
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_INT64_T
AC_TYPE_INT8_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_HEADER_TIME
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT64_T
AC_TYPE_UINT8_T
AC_C_VOLATILE

# Checks for library functions.
AC_FUNC_CLOSEDIR_VOID
AC_FUNC_ERROR_AT_LINE
AC_REPLACE_FNMATCH
AC_FUNC_FORK
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MALLOC
AC_FUNC_MEMCMP
AC_FUNC_REALLOC
AC_FUNC_SELECT_ARGTYPES
AC_TYPE_SIGNAL
AC_FUNC_STRFTIME
AC_FUNC_VPRINTF
AC_CHECK_FUNCS([alarm alphasort atexit bzero dup2 endgrent endpwent fcntl \
		getcwd getpeerucred gettimeofday inet_ntoa memmove memset \
		mkdir scandir select socket strcasecmp strchr strdup \
		strerror strrchr strspn strstr pthread_spin_lock \
		pthread_spin_unlock])

# add man and init dirs?
AC_CONFIG_FILES([Makefile
                 exec/Makefile
                 include/Makefile
                 lcr/Makefile
                 lib/Makefile
                 man/Makefile
                 pkgconfig/Makefile
                 services/Makefile
                 test/Makefile
                 tools/Makefile])

### Local business

# ===============================================
# Helpers
# ===============================================

## helper for CC stuff
cc_supports_flag() {
	local CFLAGS="$@"
	AC_MSG_CHECKING([whether $CC supports "$@"])
	AC_COMPILE_IFELSE([int main(){return 0;}] ,
			  [RC=0; AC_MSG_RESULT([yes])],
			  [RC=1; AC_MSG_RESULT([no])])
	return $RC
}

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

## local defines
PKG_FEATURES=""

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

# libraries SONAME
SOMAJOR="3"
SOMINOR="0"
SOMICRO="0"
SONAME="${SOMAJOR}.${SOMINOR}.${SOMICRO}"

# local options
AC_ARG_ENABLE([ansi],
	[  --enable-ansi           : force to build with ANSI standards. ],
	[ default="no" ])

AC_ARG_ENABLE([fatal-warnings],
	[  --enable-fatal-warnings : enable fatal warnings. ],
	[ default="no" ])

AC_ARG_ENABLE([debug],
	[ --enable-debug          : enable debug build. ],
	[ default="no" ])

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

AC_ARG_WITH([lcrso-dir],
	[  --with-lcrso-dir=DIR    : corosync lcrso files. ],
	[ LCRSODIR="$withval" ],
	[ LCRSODIR="$libexecdir/lcrso" ])

AC_ARG_WITH([socket-dir],
	[  --with-socket-dir=DIR   : corosync socket dir. ],
	[ SOCKETDIR="$withval" ],
	[ SOCKETDIR="$localstatedir/run" ])

# OS detection
# THIS SECTION MUST DIE!

case "$host_os" in
	*linux*)
		AC_DEFINE_UNQUOTED([COROSYNC_LINUX], [1],
				   [Compiling for Linux platform])
		OS_CFLAGS=""
		OS_CPPFLAGS=""
		OS_LDFLAGS=""
		OS_DYFLAGS="-rdynamic"
		DARWIN_OPTS=""
	;;
	darwin*)
		AC_DEFINE_UNQUOTED([COROSYNC_DARWIN], [1],
				   [Compiling for Darwin platform])
		OS_CFLAGS=""
		OS_CPPFLAGS=""
		OS_LDFLAGS=""
		OS_DYFLAGS=""
		DARWIN_OPTS="-dynamiclib -bind_at_load \
			     -current_version ${SONAME} \
			     -compatibility_version ${SONAME}"
	;;
	*bsd*)
		AC_DEFINE_UNQUOTED([COROSYNC_BSD], [1],
				   [Compiling for BSD platform])
		OS_CFLAGS=""
		OS_CPPFLAGS="-I/usr/local/include"
		OS_LDFLAGS="-L/usr/local/lib"
		OS_DYFLAGS="-export-dynamic"
		DARWIN_OPTS=""
	;;
	*solaris*)
		AC_DEFINE_UNQUOTED([COROSYNC_SOLARIS], [1],
				   [Compiling for Solaris platform])
		AC_DEFINE_UNQUOTED([TS_CLASS], [1],
				   [Prevent being scheduled RR])
		OS_CFLAGS=""
		OS_CPPFLAGS="-D_REENTRANT"
		OS_LDFLAGS="-Wl,-rpath-link=/usr/lib"
		OS_DYFLAGS="-Wl,--export-dynamic"
		DARWIN_OPTS=""
	;;
	*)
		AC_MSG_ERROR([Unsupported OS? hmmmm])
	;;
esac

# *FLAGS handling goes here

ENV_CFLAGS="$CFLAGS"
ENV_CPPFLAGS="$CPPFLAGS"
ENV_LDFLAGS="$LDFLAGS"

# debug build stuff
if test "x${enable_debug}" = xyes; then
	AC_DEFINE_UNQUOTED([DEBUG], [1], [Compiling Debugging code])
	OPT_CFLAGS="-O0"
	PKG_FEATURES="$PKG_FEATURES debug"
else
	OPT_CFLAGS="-O3"
fi

# gdb flags
if test "x${GCC}" = xyes; then
	GDB_FLAGS="-ggdb3"
else
	GDB_FLAGS="-g"
fi

# extra warnings
EXTRA_WARNINGS=""

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

if test "x${enable_coverage}" = xyes && \
		cc_supports_flag -ftest-coverage && \
		cc_supports_flag -fprofile-arcs ; then
	AC_MSG_NOTICE([Enabling Coverage (enable -O0 by default)])
	OPT_CFLAGS="-O0"
	COVERAGE_CFLAGS="-ftest-coverage -fprofile-arcs"
	COVERAGE_LDFLAGS="-ftest-coverage -fprofile-arcs"
	PKG_FEATURES="$PKG_FEATURES coverage"
else
	COVERAGE_CFLAGS=""
	COVERAGE_LDFLAGS=""
fi

if test "x${enable_ansi}" = xyes && \
		cc_supports_flag -std=iso9899:199409 ; then
	AC_MSG_NOTICE([Enabling ANSI Compatibility])
	ANSI_CPPFLAGS="-ansi -D_GNU_SOURCE -DANSI_ONLY"
	PKG_FEATURES="$PKG_FEATURES ansi"
else
	ANSI_CPPFLAGS=""
fi

if test "x${enable_fatal_warnings}" = xyes && \
		cc_supports_flag -Werror ; then
	AC_MSG_NOTICE([Enabling Fatal Warnings (-Werror)])
	WERROR_CFLAGS="-Werror"
	PKG_FEATURES="$PKG_FEATURES fatal-warnings"
else
	WERROR_CFLAGS=""
fi

# final build of *FLAGS
CFLAGS="$ENV_CFLAGS $OPT_CFLAGS $GDB_FLAGS $OS_CFLAGS \
	$COVERAGE_CFLAGS $EXTRA_WARNINGS $WERROR_CFLAGS"
CPPFLAGS="$ENV_CPPFLAGS $ANSI_CPPFLAGS $OS_CPPFLAGS"
LDFLAGS="$ENV_LDFLAGS $COVERAGE_LDFLAGS $OS_LDFLAGS"

# substitute what we need:
AC_SUBST([LCRSODIR])
AC_SUBST([SOCKETDIR])

AC_SUBST([SOMAJOR])
AC_SUBST([SOMINOR])
AC_SUBST([SOMICRO])
AC_SUBST([SONAME])

AC_SUBST([OS_DYFLAGS])

AM_CONDITIONAL(BUILD_DARWIN, test -n "${DARWIN_OPTS}")
AC_SUBST([DARWIN_OPTS])

AM_CONDITIONAL(BUILD_HTML_DOCS, test -n "${GROFF}")

AC_SUBST([LINT_FLAGS])

AC_DEFINE_UNQUOTED([LCRSODIR], "$(eval echo ${LCRSODIR})", [LCRSO directory])
AC_DEFINE_UNQUOTED([SOCKETDIR], "$(eval echo ${SOCKETDIR})", [Socket directory])
AC_DEFINE_UNQUOTED([LOCALSTATEDIR], "$(eval echo ${localstatedir})", [localstate directory])
AC_DEFINE_UNQUOTED([SYSCONFDIR], "$(eval echo ${sysconfdir})", [sysconfig directory])

AC_OUTPUT

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([  Doc dir                  = ${docdir}])
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([  LCRSO                    = ${LCRSODIR}])
AC_MSG_RESULT([  SOCKETDIR                = ${SOCKETDIR}])
AC_MSG_RESULT([  Features                 =${PKG_FEATURES}])
AC_MSG_RESULT([])
AC_MSG_RESULT([$PACKAGE build info:])
AC_MSG_RESULT([  Library SONAME           = ${SONAME}])
AC_MSG_RESULT([  Default optimization     = ${OPT_CFLAGS}])
AC_MSG_RESULT([  Default debug options    = ${GDB_CFLAGS}])
AC_MSG_RESULT([  Extra compiler warnings  = ${EXTRA_WARNING}])
AC_MSG_RESULT([  Env. defined CFLAG       = ${ENV_CFLAGS}])
AC_MSG_RESULT([  Env. defined CPPFLAGS    = ${ENV_CPPFLAGS}])
AC_MSG_RESULT([  Env. defined LDFLAGS     = ${ENV_LDFLAGS}])
AC_MSG_RESULT([  OS   defined CFLAGS      = ${OS_CFLAGS}])
AC_MSG_RESULT([  OS   defined CPPFLAGS    = ${OS_CPPFLAGS}])
AC_MSG_RESULT([  OS   defined LDFLAGS     = ${OS_LDFLAGS}])
AC_MSG_RESULT([  OS   defined DYFLAGS     = ${OS_DYFLAGS}])
AC_MSG_RESULT([  ANSI defined CPPFLAGS    = ${ANSI_CPPFLAGS}])
AC_MSG_RESULT([  Coverage     CFLAGS      = ${COVERAGE_CFLAGS}])
AC_MSG_RESULT([  Coverage     LDFLAGS     = ${COVERAGE_LDFLAGS}])
AC_MSG_RESULT([  Fatal War.   CFLAGS      = ${WERROR_CFLAGS}])
AC_MSG_RESULT([  Final        CFLAGS      = ${CFLAGS}])
AC_MSG_RESULT([  Final        CPPFLAGS    = ${CPPFLAGS}])
AC_MSG_RESULT([  Final        LDFLAGS     = ${LDFLAGS}])