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

AC_INIT(rAthena)
AC_REVISION($Revision$)
AC_PREREQ([2.59])
AC_CONFIG_SRCDIR([src/common/cbasetypes.h])
AC_CONFIG_FILES([Makefile src/common/Makefile])
AC_CONFIG_FILES([3rdparty/mt19937ar/Makefile])
AC_CONFIG_FILES([src/char/Makefile src/login/Makefile])
AC_CONFIG_FILES([src/map/Makefile src/plugins/Makefile src/tool/Makefile])


#
# Memory managers
#
AC_ARG_ENABLE(
	[manager],
	AC_HELP_STRING(
		[--enable-manager=ARG],
		[memory managers: no, builtin, memwatch, dmalloc, gcollect, bcheck (defaults to builtin)]
	),
	[
		enable_manager="$enableval"
		case $enableval in
			"no");;
			"builtin");;
			"memwatch");;
			"dmalloc");;
			"gcollect");;
			"bcheck");;
			*) AC_MSG_ERROR([[unknown memory manager '$enableval'... stopping]]);;
		esac
	],
	[enable_manager="builtin"]
)


#
# packetver
#
AC_ARG_ENABLE(
	[packetver],
	AC_HELP_STRING(
		[--enable-packetver=ARG],
		[Sets the PACKETVER define of the map-server. (see src/map/clif.h)]
	),
	[enable_packetver="$enableval"],
	[enable_packetver=""]
)


#
# debug
#
AC_ARG_ENABLE(
	[debug],
	AC_HELP_STRING(
		[--enable-debug@<:@=ARG@:>@],
		[
			Compiles extra debug code. (disabled by default)
			(available options: yes, no, gdb)
		]
	),
	[
		enable_debug="$enableval"
		case $enableval in
			"no");;
			"yes");;
			"gdb");;
			*) AC_MSG_ERROR([[invalid argument --enable-debug=$enableval... stopping]]);;
		esac
	],
	[enable_debug="no"]
)

#
# Buildbot
#
AC_ARG_ENABLE(
	[buildbot],
	AC_HELP_STRING(
		[--enable-buildbot@<:@=ARG@:>@],
		[(available options: yes, no)]
	),
	[
		enable_buildbot="$enableval"
		case $enableval in
			"no");;
			"yes");;
			*) AC_MSG_ERROR([[invalid argument --enable-buildbot=$enableval... stopping]]);;
		esac
	],
	[enable_buildbot="no"]
)

#
# RDTSC as Tick Source 
#
AC_ARG_ENABLE(
	[rdtsc],
	AC_HELP_STRING(
		[--enable-rdtsc],
		[
			Uses rdtsc as timing source (disabled by default)
			Enable it when you've timing issues.

			(For example:  in conjunction with XEN or Other Virtualization mechanisms)
		
			Note:
				Please ensure that you've disabled dynamic CPU-Frequencys, such as power saving options.
				(On the most modern Dedicated Servers cpufreq is preconfigured, see your distribution's manual
				 how to disable it)
		]
	),
	[
		enable_rdtsc=1
	],
	[enable_rdtsc=0]
)

#
# Profiler
#
AC_ARG_ENABLE(
	[profiler],
	AC_HELP_STRING(
		[--enable-profiler=ARG],
		[Profilers: no, gprof (disabled by default)]
	),
	[
		enable_profiler="$enableval"
		case $enableval in
			"no");;
			"gprof");;
			*) AC_MSG_ERROR([[invalid argument --enable-profiler=$enableval... stopping]]);;
		esac
	],
	[enable_profiler="no"]
)


#
# 64bit
#
AC_ARG_ENABLE(
	[64bit],
	AC_HELP_STRING(
		[--enable-64bit],
		[
			Don't force 32 bit. (disabled by default)
			64bit support is still being tested, not recommended for production servers.
		]
	),
	[
		enable_64bit="$enableval"
		case $enableval in
			"no");;
			"yes");;
			*) AC_MSG_ERROR([[invalid argument --enable-64bit=$enableval... stopping]]);;
		esac
	],
	[enable_64bit="no"]
)


#
# Optionally specify the path to mysql_config
#
AC_ARG_WITH(
	[mysql],
	AC_HELP_STRING(
		[--with-mysql@<:@=ARG@:>@],
		[optionally specify the path to the mysql_config executable]
	),
	[
		if test "$withval" != "no" ; then
			if test ! -x "$withval" ; then
				AC_MSG_ERROR([$withval is not an executable file])
			fi
			MYSQL_CONFIG_HOME="$withval"
		fi
	]
)


#
# Manual MYSQL_CFLAGS (optional)
#
AC_ARG_WITH(
	[MYSQL_CFLAGS],
	AC_HELP_STRING(
		[--with-MYSQL_CFLAGS=ARG],
		[specify MYSQL_CFLAGS manually (instead of using "mysql_config --include")]
	),
	[
		manual_MYSQL_CFLAGS="yes"
		MYSQL_CFLAGS="$withval"
	],
	[manual_MYSQL_CFLAGS="no"]
)


#
# Manual MYSQL_LIBS (optional)
#
AC_ARG_WITH(
	[MYSQL_LIBS],
	AC_HELP_STRING(
		[--with-MYSQL_LIBS=ARG],
		[specify MYSQL_LIBS manually (instead of using "mysql_config --libs")]
	),
	[
		manual_MYSQL_LIBS="yes"
		MYSQL_LIBS="$withval"
	],
	[manual_MYSQL_LIBS="no"]
)


#
# Enable/disable PCRE and optionally specify the path (optional library)
#
AC_ARG_WITH(
	[pcre],
	AC_HELP_STRING(
		[--with-pcre@<:@=ARG@:>@],
		[use PCRE library, optionally specify the full path of pcre installation directory (by default pcre is used if found)]
	),
	[
		if test "$withval" = "no" ; then
			want_pcre="no"
		else
			want_pcre="yes"
			require_pcre="yes"
			if test "$withval" != "yes" ; then
				if test ! -d "$withval" ; then
					AC_MSG_ERROR([$withval is not a directoy])
				fi
				PCRE_HOME="$withval"
			fi
		fi
	],
	[want_pcre="yes" require_pcre="no"]
)


#
# Specify the path of the zlib library (required library)
#
AC_ARG_WITH(
	[zlib],
	AC_HELP_STRING(
		[--with-zlib=DIR],
		[root directory path of zlib installation (defaults to /usr/local or /usr if not found in /usr/local).
		 Assumes that the header files are in DIR/include and the library files are in DIR/lib]
	),
	[
		test -n "$withval" && ZLIB_HOME="$withval"
	],
	[
		ZLIB_HOME=/usr/local
		test ! -f "${ZLIB_HOME}/include/zlib.h" && ZLIB_HOME=/usr
	]
)



###############################################################################
# Check for programs and types.
#



AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP
AC_LANG([C])


CFLAGS="$CFLAGS -pipe -ffast-math -Wall -Wno-sign-compare"
CPPFLAGS="$CPPFLAGS -I../common"


AC_C_BIGENDIAN(
	[AC_MSG_ERROR([[bigendian is not supported... stopping]])],
	,
	[AC_MSG_WARN([[unable to determine endianess, only little endian is supported]])]
)


if test "$enable_64bit" = "no" ; then
	AC_MSG_CHECKING([whether pointers can be stored in ints (old code)])
	pointers_fit_in_ints="no"
	AC_COMPILE_IFELSE(
		[AC_LANG_PROGRAM([[static int test_array[((long int)sizeof(int)) == ((long int)sizeof(void*)) ? 1 : -1];]])],
		[pointers_fit_in_ints="yes"],
		[]
	)
	if test "$pointers_fit_in_ints" = "no" ; then
		CFLAGS="$CFLAGS -m32"
		LDFLAGS="$LDFLAGS -m32"
		AC_COMPILE_IFELSE(
			[AC_LANG_PROGRAM([[static int test_array[((long int)sizeof(int)) == ((long int)sizeof(void *)) ? 1 : -1];]])],
			[pointers_fit_in_ints="yes (with -m32)"],
			[]
		)
	fi
	AC_MSG_RESULT($pointers_fit_in_ints)
	if test "$pointers_fit_in_ints" = "no" ; then
		AC_MSG_ERROR([pointers cannot be stored in ints, required for old code... stopping])
	fi
fi


AC_MSG_CHECKING([whether $CC supports -Wno-unused-parameter])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-unused-parameter"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


AC_MSG_CHECKING([whether $CC supports -Wno-pointer-sign])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-pointer-sign"
AC_COMPILE_IFELSE(
	[int foo;],
	[
		AC_MSG_RESULT([yes])
		AC_MSG_CHECKING([whether $CC can actually use -Wno-pointer-sign])
		# This option causes warnings in C++ mode
		# Note: -Werror must be before -Wno-pointer-sign, otherwise it does not do anything
		CFLAGS="$OLD_CFLAGS -Werror -Wno-pointer-sign"
		AC_COMPILE_IFELSE(
			[int foo;],
			[
				AC_MSG_RESULT([yes])
				CFLAGS="$OLD_CFLAGS -Wno-pointer-sign"
			],
			[
				AC_MSG_RESULT([no])
				CFLAGS="$OLD_CFLAGS"
			]
		)
	],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


AC_MSG_CHECKING([whether $CC supports -Wno-switch])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wno-switch"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


AC_MSG_CHECKING([whether $CC supports -fPIC])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fPIC"
AC_COMPILE_IFELSE(
	[int foo;],
	[
		AC_MSG_RESULT([yes])
		compiler_supports_pic="yes"
	],
	[
		AC_MSG_RESULT([no])
		compiler_supports_pic="no"
	]
)
CFLAGS="$OLD_CFLAGS"


#
# -shared needs position independent code; some platforms emit it
# always, others need -fPIC
#
AC_MSG_CHECKING([whether $CC needs -fPIC for shared objects])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -shared"
WITH_PLUGINS="yes"
AC_LINK_IFELSE(
	[
		int foo(void)
		{
			return 0;
		}
	],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	],
	[
		if test "$compiler_supports_pic" = "yes" ; then
			# Verify if -shared really fails due to lack of -fPIC or something else
			CFLAGS="$CFLAGS -fPIC"
			AC_LINK_IFELSE(
				[
					int foo(void)
					{
						return 0;
					}
				],
				[
					AC_MSG_RESULT([yes])
					CFLAGS="$OLD_CFLAGS -fPIC"
				],
				[
					AC_MSG_RESULT([no, but fails for another reason])
					AC_MSG_ERROR([compiler is unable to compile shared objects for an unhandled reason, please report this with attached config.log... stopping])
				]
			)
		else
			# Disable compilation of plugins (optional), so 'make all' does not fail
			AC_MSG_RESULT([yes, but unsupported])
			AC_MSG_NOTICE([compiler is unable to generate position independent code, disabled plugins (optional)])
			WITH_PLUGINS="no"
		fi
	]
)
AC_SUBST([WITH_PLUGINS])


#
# -O2 implies -fstrict-aliasing, but the code is not safe for that
#
AC_MSG_CHECKING([whether $CC supports -fno-strict-aliasing])
OLD_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -fno-strict-aliasing"
AC_COMPILE_IFELSE(
	[int foo;],
	[AC_MSG_RESULT([yes])],
	[
		AC_MSG_RESULT([no])
		CFLAGS="$OLD_CFLAGS"
	]
)


###############################################################################
# Check for libraries and header files.
#


#
# setrlimit - used to set the socket limit
#
AC_CHECK_FUNC([setrlimit],[CFLAGS="$CFLAGS -DHAVE_SETRLIMIT"])


#
# strnlen - string length with upper scan bound
#
AC_CHECK_FUNC([strnlen],[CFLAGS="$CFLAGS -DHAVE_STRNLEN"])


#
# Memory manager
#
case $enable_manager in
	"no")
		CFLAGS="$CFLAGS -DNO_MEMMGR"
		;;
	"builtin")
		# enabled by default
		;;
	"memwatch")
		CFLAGS="$CFLAGS -DMEMWATCH"
		AC_CHECK_HEADER([memwatch.h], , [AC_MSG_ERROR([memwatch header not found... stopping])])
		;;
	"dmalloc")
		CFLAGS="$CFLAGS -DDMALLOC -DDMALLOC_FUNC_CHECK"
		LIBS="$LIBS -ldmalloc"
		AC_CHECK_HEADER([dmalloc.h], , [AC_MSG_ERROR([dmalloc header not found... stopping])])
		;;
	"gcollect")
		CFLAGS="$CFLAGS -DGCOLLECT"
		LIBS="$LIBS -lgc"
		AC_CHECK_HEADER([gc.h], , [AC_MSG_ERROR([gcollect header not found... stopping])])
		;;
	"bcheck")
		CFLAGS="$CFLAGS -DBCHECK"
		;;
esac


#
# Packetver
#
if test -n "$enable_packetver" ; then
	CFLAGS="$CFLAGS -DPACKETVER=$enable_packetver"
fi


#
# Debug
#
case $enable_debug in
	"no")
		# default value
		CFLAGS="$CFLAGS -Wno-unused -Wno-parentheses"
		;;
	"yes")
		CFLAGS="$CFLAGS -g -DDEBUG"
		;;
	"gdb")
		CFLAGS="$CFLAGS -ggdb -DDEBUG"
		;;
esac

#
# Buildbot
#
case $enable_buildbot in
	"no")
		# default value
		;;
	"yes")
		CFLAGS="$CFLAGS -DBUILDBOT"
		;;
esac

#
# RDTSC
#
case $enable_rdtsc in
	0)
		#default value
		;;
	1)
		CFLAGS="$CFLAGS -DENABLE_RDTSC"
		;;
esac


#
# Profiler
#
case $enable_profiler in
	"no")
		# default value
		;;
	"gprof")
		CFLAGS="$CFLAGS -pg"
		LDFLAGS="$LDFLAGS -pg"
		;;
esac


#
# zlib library (required)
#
if test -n "${ZLIB_HOME}" ; then
	LDFLAGS="$LDFLAGS -L${ZLIB_HOME}/lib"
	CPPFLAGS="$CPPFLAGS -I${ZLIB_HOME}/include"
fi
AC_CHECK_LIB([z], [inflateEnd], [],[AC_MSG_ERROR([zlib library not found or incompatible, please specify the correct path with --with-zlib=DIR... stopping])])
AC_CHECK_HEADER([zlib.h], [], [AC_MSG_ERROR([zlib header not found, please specify the correct path with --with-zlib=DIR... stopping])])


#
# math library (required)
#
AC_SEARCH_LIBS([sqrt], [m], [], [AC_MSG_ERROR([math library not found... stopping])])


#
# clock_gettime (optional, rt on Debian)
#
AC_SEARCH_LIBS([clock_gettime], [rt])


#
# CLOCK_MONOTONIC clock for clock_gettime
# Normally defines _POSIX_TIMERS > 0 and _POSIX_MONOTONIC_CLOCK (for posix
# compliant systems) and __FreeBSD_cc_version >= 500005 (for FreeBSD
# >= 5.1.0, which does not have the posix defines (ref. r11983)) would be
# checked but some systems define them even when they do not support it
# (ref. bugreport:1003).
#
if test "$ac_cv_search_clock_gettime" != "no" ; then
	AC_MSG_CHECKING([whether CLOCK_MONOTONIC is supported and works])
	AC_RUN_IFELSE(
		[
			#include <sys/time.h>
			#include <time.h>
			#include <unistd.h>
			
			int main(int argc, char** argv)
			{
				struct timespec tval;
				return clock_gettime(CLOCK_MONOTONIC, &tval);
			}
		],
		[
			AC_MSG_RESULT([yes])
			CFLAGS="$CFLAGS -DHAVE_MONOTONIC_CLOCK"
		],
		[
			# either it failed to compile (CLOCK_MONOTONIC undefined)
			# or clock_gettime has returned a non-zero value
			AC_MSG_RESULT([no])
		],
		[
			AC_MSG_RESULT([guessing no])
		]
	)
fi


#
# MySQL library
#

if test -z "$MYSQL_CONFIG_HOME"; then
	AC_PATH_PROG([MYSQL_CONFIG_HOME], [mysql_config], [no])
fi

if test "$MYSQL_CONFIG_HOME" != "no" ; then
	MYSQL_VERSION="`$MYSQL_CONFIG_HOME --version`"
	if test "$manual_MYSQL_CFLAGS" = "no" ; then
		MYSQL_CFLAGS="`$MYSQL_CONFIG_HOME --include`"
	fi
	if test "$manual_MYSQL_LIBS" = "no" ; then
		MYSQL_LIBS="`$MYSQL_CONFIG_HOME --libs`"
	fi
else
	MYSQL_VERSION="unknown"
fi

MYSQL_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS $MYSQL_LIBS"
MYSQL_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS $MYSQL_CFLAGS"
AC_CHECK_LIB([mysqlclient], [mysql_init], [HAVE_MYSQL="yes"], [])
AC_CHECK_HEADER([mysql.h], [], [HAVE_MYSQL=""])
CPPFLAGS="$MYSQL_OLD_CPPFLAGS"
LDFLAGS="$MYSQL_OLD_LDFLAGS"

AC_MSG_CHECKING([MySQL library (required)])
if test "$HAVE_MYSQL" = "yes" ; then
	AC_MSG_RESULT([yes ($MYSQL_VERSION)])
else
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([MySQL not found or incompatible])
fi

AC_SUBST([HAVE_MYSQL])
AC_SUBST([MYSQL_VERSION])
AC_SUBST([MYSQL_CFLAGS])
AC_SUBST([MYSQL_LIBS])


#
# PCRE library (optional)
#
##TODO PCRE version
PCRE_LIBS=""
PCRE_CFLAGS=""

if test "$want_pcre" = "no" ; then
	AC_MSG_NOTICE([ignoring PCRE (optional)])
else
	if test -z "$PCRE_HOME" ; then
		AC_CHECK_LIB([pcre], [pcre_study], [HAVE_PCRE="yes"], [])
		if test "$HAVE_PCRE" = "yes" ; then
			PCRE_LIBS="-lpcre"
		fi
	else
		PCRE_OLD_LDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS -L$PCRE_HOME/lib"
		PCRE_OLD_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS -I$PCRE_HOME/include"
		AC_CHECK_LIB(pcre, pcre_compile, [HAVE_PCRE="yes"], [])
		CPPFLAGS="$PCRE_OLD_CPPFLAGS"
		LDFLAGS="$PCRE_OLD_LDFLAGS"
		if test "$HAVE_PCRE" = "yes" ; then
			PCRE_LIBS="-L$PCRE_HOME/lib -lpcre"
			test -d "$PCRE_HOME/include" && PCRE_CFLAGS="-I$PCRE_HOME/include"
		fi
	fi
	AC_MSG_CHECKING([PCRE library (optional)])
	if test "$HAVE_PCRE" = "yes" ; then
		AC_MSG_RESULT([yes])
	else
		AC_MSG_RESULT([no])
		if test "$require_pcre" = "yes" ; then
			AC_MSG_ERROR([PCRE not found or incompatible (requested)])
		else
			AC_MSG_NOTICE([disabling PCRE (optional)])
		fi
	fi
fi

AC_SUBST([HAVE_PCRE])
AC_SUBST([PCRE_LIBS])
AC_SUBST([PCRE_CFLAGS])


#
# Host specific stuff
#
AC_MSG_CHECKING([host OS])
host_os="`uname`"
AC_MSG_RESULT([$host_os])
fd_setsize=""
DLLEXT=".so"
case $host_os in
Solaris* )
	LIBS="$LIBS -lsocket -lnsl -ldl"
	;;
Linux* )
	LIBS="$LIBS -ldl"
	;;
FreeBSD*)
	CPPFLAGS="$CPPFLAGS -D__FREEBSD__"
	;;
NetBSD*)
	CPPFLAGS="$CPPFLAGS -D__NETBSD__"
	;;
CYGWIN*)
	CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=4096 -DCYGWIN"
	fd_setsize="done"
	DLLEXT=".dll"
	;;
esac
AC_SUBST([DLLEXT])

AC_MSG_CHECKING([for MinGW])
if test -n "`$CC --version | grep -i mingw`" ; then
	AC_MSG_RESULT([yes])
	CPPFLAGS="$CPPFLAGS -DMINGW"
	if test -z "$fd_setsize" ; then
		CPPFLAGS="$CPPFLAGS -DFD_SETSIZE=4096"
	fi
	LIBS="$LIBS -lws2_32"
else
	AC_MSG_RESULT([no])
fi



###############################################################################
AC_OUTPUT
