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

# Now you only need to update the version number in two places - below,
# and in the README

AC_INIT([libtrace],[3.0.7],[contact@wand.net.nz],[libtrace])

LIBTRACE_MAJOR=3
LIBTRACE_MID=0
LIBTRACE_MINOR=7

# OpenSolaris hides libraries like libncurses in /usr/gnu/lib, which is not
# searched by default - add it to LDFLAGS so we at least have a chance of 
# finding it
if test -d "/usr/gnu/lib"; then
	LDFLAGS+=" -L/usr/gnu/lib"
fi

AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR(lib/trace.c)
AM_INIT_AUTOMAKE
m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])

AC_DEFINE([LIBTRACE_MAJOR],${LIBTRACE_MAJOR},[libtrace major version])
AC_DEFINE([LIBTRACE_MID],${LIBTRACE_MID},[libtrace mid version])
AC_DEFINE([LIBTRACE_MINOR],${LIBTRACE_MINOR},[libtrace minor version])

AC_CONFIG_FILES([Makefile lib/Makefile docs/Makefile libpacketdump/Makefile
	tools/Makefile tools/traceanon/Makefile tools/tracepktdump/Makefile 
	tools/tracemerge/Makefile tools/tracereport/Makefile
	tools/tracertstats/Makefile tools/tracesplit/Makefile
	tools/tracestats/Makefile tools/tracetop/Makefile
	tools/tracereplay/Makefile tools/tracediff/Makefile
	examples/Makefile examples/skeleton/Makefile examples/rate/Makefile
	examples/stats/Makefile examples/tutorial/Makefile
	docs/libtrace.doxygen 
	lib/libtrace.h
	])
dnl GNU C library
dnl AC_GNU_SOURCE

AC_DEFUN([rw_PROG_CXX_WORKS],
[AC_REQUIRE([AC_PROG_CXX])dnl
AC_CACHE_CHECK([whether the C++ compiler works],
	[rw_cv_prog_cxx_works],
	[AC_LANG_PUSH([C++])
	AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
		[rw_cv_prog_cxx_works=yes],
		[rw_cv_prog_cxx_works=no])
	AC_LANG_POP([C++])])
])


AM_CONFIG_HEADER([config.h])
dnl Checks for programs.
AC_PROG_CC
AC_PROG_CXX
rw_PROG_CXX_WORKS

if test "$rw_cv_prog_cxx_works" = "no"; then
	AC_MSG_ERROR("Failed to find working C++ compiler")
fi



AC_PROG_INSTALL
dnl AC_PROG_YACC
AC_CHECK_PROGS(YACC, 'bison -y' byacc yacc) 
AM_PROG_LEX

AC_CONFIG_LIBOBJ_DIR(lib)

# Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_C_INLINE
AC_C_BIGENDIAN
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_SYS_LARGEFILE

if test "$GCC" = "yes"; then
	
	gcc_version=`gcc -dumpversion`

	# This is probably not the most reliable way to test whether our
	# compiler supports visibility, but it's better than nothing
	#
	# According to the gcc wiki - http://gcc.gnu.org/wiki/Visibility - 
	# visibility is supported in gcc 4.0 or later, so we just need to
	# check the major version number

	major=${gcc_version%\.*\.*}

	if test "$major" -lt 4; then
		vis=no
	else
		vis=yes
	fi
	
	CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -O2"
	CXXFLAGS="$CXXFLAGS -Wall -O2"
	LIBCFLAGS="$CFLAGS"
	LIBCFLAGS="$LIBCFLAGS -DLT_BUILDING_DLL=1"
	LIBCXXFLAGS="$CXXFLAGS"
	LIBCXXFLAGS="$CXXFLAGS -DLT_BUILDING_DLL=1"
	
	if test "$vis" = "yes"; then
		LIBCFLAGS="$LIBCFLAGS -Wextra -fvisibility=hidden"
		LIBCXXFLAGS="$CXXFLAGS -Wextra -fvisibility=hidden"
	fi
fi

AC_PROG_LIBTOOL

# Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_CHECK_FUNCS(socket strdup strlcpy strcasecmp strncasecmp snprintf)

AC_CHECK_SIZEOF([long int])



# Check for various broken functions
AC_FUNC_MALLOC
AC_FUNC_REALLOC

# *BSD doesn't have strndup. Currently provide our own.
AC_REPLACE_FUNCS(strndup)

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(pcap.h pcap-int.h pcap-bpf.h net/bpf.h sys/limits.h stddef.h inttypes.h limits.h net/ethernet.h sys/prctl.h)

AC_CHECK_HEADERS(ncurses.h,,[missing_ncurses=true])

if test "x$missing_ncurses" = xtrue; then
	if test -f "/usr/include/ncurses/ncurses.h"; then
		AC_DEFINE(HAVE_NCURSES_NCURSES_H,1,[Has nested ncurses header])
	fi
fi


AC_CHECK_HEADERS(netinet/in.h)
AC_CHECK_HEADERS(netpacket/packet.h,[
	libtrace_netpacket_packet_h=true
	AC_DEFINE(HAVE_NETPACKET_PACKET_H,1,[has net])
])
AC_CHECK_HEADER(net/if.h,
	AC_DEFINE(HAVE_NET_IF_H,1,[has net/if.h header]),,[
 #include <sys/types.h>
 #include <sys/socket.h>
])

AC_CHECK_HEADER(netinet/ether.h,
	AC_DEFINE(HAVE_NETINET_ETHER_H,1,[has netinet/ether.h header]),,[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <net/if.h>
])

AC_CHECK_HEADER(netinet/if_ether.h,
	AC_DEFINE(HAVE_NETINET_IF_ETHER_H,1,[has netinet/if_ether.h]),,[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <net/if.h>
])

AC_CHECK_HEADER(net/if_arp.h,
	AC_DEFINE(HAVE_NET_IF_ARP_H,1,[has net/if_arp.h]),,[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <net/if.h>
])

if test "$libtrace_netpacket_packet_h" != "true"; then
# Check for sdl_len in sockaddr_dl
	AC_CHECK_MEMBER([struct sockaddr_dl.sdl_len], 
		AC_DEFINE(HAVE_SDL_LEN,1,[Has sdl_len in sockaddr_dl]),,[
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <net/if_dl.h>
		])
fi



# Checking for the right bpf header to include
AC_CHECK_HEADER(pcap-bpf.h)
AC_CHECK_HEADER(net/bpf.h)
AC_CHECK_HEADER(gdc.h,AC_DEFINE(HAVE_LIBGDC,1,[has gdc.h]))

# Check to see if we have libdl - *BSD has built-in libdl
AC_CHECK_LIB(dl, dlopen)
# check pcap
AC_CHECK_LIB(pcap,pcap_next_ex,pcapfound=1,pcapfound=0)
#AC_CHECK_LIB(pcap,pcap_next_ex)
#AC_REPLACE_FUNCS(pcap_open_dead)
#AC_REPLACE_FUNCS(pcap_dump_flush)
#AC_REPLACE_FUNCS(pcap_next_ex)
AC_CHECK_FUNCS(pcap_inject pcap_sendpacket pcap_setnonblock)
AC_CHECK_DECLS([BIOCSETIF],,,[
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <net/bpf.h>
])

# configure time options for man pages
AC_ARG_WITH(man,
	    AS_HELP_STRING(--with-man,install man pages by default),[
	     if test "$withval" = yes
	     then
		     MANPAGES="docs/man/man3/[a-zA-Z]*.3"
	     else
		     MANPAGES=""
	     fi
])

AC_PROG_CXX

if test "$pcapfound" = 0; then
	AC_MSG_ERROR(libpcap0.8 or greater is required to compile libtrace. If you have installed it in a non-standard location please use LDFLAGS to specify the location of the library)
else
	ADD_LIBS="$ADD_LIBS -lpcap"
	AC_DEFINE([HAVE_LIBPCAP],1,[compile with libpcap support])
	AC_DEFINE([HAVE_BPF_FILTER],1,[compile with bpf filter support])
fi

# configure time options for use of DAG cards
# borrowed from libpcap!
AC_ARG_WITH(dag, 
	    AS_HELP_STRING(--with-dag[=DIR],include DAG live capture support (located in directory DIR, if supplied)),
[
        if test "$withval" = no
        then
                want_dag=no
        elif test "$withval" = yes
        then
                want_dag=yes
                dag_root=/usr/local/dag
        else
                want_dag=yes
                dag_root=$withval
        fi
],[
        #
        # Use DAG API if present, otherwise don't
        #
        want_dag=ifpresent
        dag_root=/usr/local/dag
])

# DAG 3.0 actually puts header files and shared libraries into sensible
# places now, so we should be able to do a simple CHECK_LIB to see if
# they're there!

# Addendum: It turns out DAG 2.5 does this too, so we'll match DAG2.5 in here
# also. This isn't such a bad thing, the DAG2.5 API is essentially the same as
# DAG 3.0 and libtrace will use the same format_dagXX source for both
libtrace_dag=false
libtrace_dag_version=none

if test "$with_dag" != no; then
	AC_CHECK_LIB(dag, dag_open, dag_found=1, dag_found=0)
	if test "$dag_found" = 1; then
		ADD_LIBS="$ADD_LIBS -ldag"
		AC_DEFINE(HAVE_DAG_API, 1, [define if you have the DAG API])
		AC_DEFINE(HAVE_DAG,1,[conditional for building with DAG live capture support])
		libtrace_dag=true
		
		AC_DEFINE(DAG_VERSION,25,[defines the DAG driver version])
		libtrace_dag_version=25
	fi
fi

# turn the test part of the next block into a function, so it can be 
# called multiple times for $dag_root, /root/dag, /usr/local/lib
dag_drv_v="DAG not present"

# Now check for 2.4 DAG drivers which don't install as cleanly!
if test "$with_dag" != no -a "$libtrace_dag" = false; then
        AC_MSG_CHECKING(whether we have DAG 2.4 API instead)

	if test -r "$dag_root/lib"; then
		dag_lib_dir="$dag_root/lib"
	else
		dag_lib_dir="$dag_root"
	fi
	
	if test -r "$dag_root/include"; then
		dag_tools_dir="$dag_root/tools"
                dag_include_dir="$dag_root/include"
        else
                dag_tools_dir="$dag_root"
                dag_include_dir="$dag_root"
	fi

        if test -r "$dag_include_dir/dagapi.h" -a -r "$dag_lib_dir/libdag.a"; 
	then
                ADD_INCLS="$ADD_INCLS -I $dag_include_dir"
		ADD_LIBS="$ADD_LIBS -ldag"
		ADD_LDFLAGS="$ADD_LDFLAGS -L$dag_lib_dir"
		DAG_TOOLS_DIR=$dag_tools_dir
		AC_SUBST([DAG_TOOLS_DIR])
                libtrace_dag=true
                
		AC_DEFINE(HAVE_DAG_API, 1, [define if you have the DAG API])
		AC_DEFINE(HAVE_DAG,1,[conditional for building with DAG live capture support])
		AC_DEFINE(DAG_VERSION, 24, [defines the DAG driver version])
		libtrace_dag_version=24
        else
                if test "$want_dag" = yes; then
                        AC_MSG_ERROR(DAG API not found under directory $dag_root
; use --without-dag)
                fi
                libtrace_dag=false
        fi
        AC_MSG_RESULT($libtrace_dag)

fi

# Try to determine the DAG driver version
if test x"$libtrace_dag" = xtrue; then
        dag_drv_v="Unknown"
	files=`locate /usr/*dag*/VERSION`
        file_count=0

        for i in $files; do
                if $file_count > 0; then
                        dag_drv_v="Indeterminate"
                        break
                fi
                dag_drv_v=`cat $i`
                file_count=$file_count+1
        done
fi
DAG_VERSION_NUM=$dag_drv_v

have_ncurses=yes

AC_CHECK_LIB(z, deflate)
AC_CHECK_LIB(bz2, BZ2_bzDecompressInit)
AC_CHECK_LIB(lzo2, lzo1x_1_compress)
AC_CHECK_LIB(pthread, pthread_create)
AC_SEARCH_LIBS(mvprintw, ncurses, , have_ncurses=no)
AC_SEARCH_LIBS(getservent, socket, [], [], -lnsl)		
AC_SEARCH_LIBS(inet_ntop, nsl, [], [], -lsocket)


# For now, the user has to explicitly ask for the LLVM stuff, as it's a bit
# rough around the edges :(
AC_ARG_WITH([llvm],
	[AC_HELP_STRING([--with-llvm],
		[support Just In Time compiler])],
	use_llvm="yes",
	use_llvm="no")
JIT=no

if (test "$use_llvm" != "no"); then
	AC_PATH_PROG(LLVM_CONFIG, llvm-config, no)

	# XXX Hard coding the path is REALLY bad.
	# llvm-gcc is installed in a stupid place in Debian / Ubuntu. Hard luck
	# if you've installed it somewhere custom.
	# Hopefully in future we can replace this with clang, which may or may
	# not be installed somewhere intelligent.
	AC_PATH_PROG(LLVM_GCC, llvm-gcc, no, /usr/lib/llvm/llvm/gcc-4.2/bin)

	AC_LANG_PUSH([C++])
	AC_CHECK_HEADERS([boost/lexical_cast.hpp], boost="yes", boost="no")
	AC_LANG_POP([C++])

		
	if test "$boost" = "no"; then
		AC_MSG_NOTICE([Unabled to find boost libraries.  JIT support disabled.])
		JIT=no
	elif test "$LLVM_CONFIG" = "no" ; then
		AC_MSG_NOTICE([Unable to find llvm-config.  JIT support disabled.])
		JIT=no
	elif test "$LLVM_GCC" = "no"; then
		AC_MSG_NOTICE([Unable to find llvm-gcc.  JIT support disabled.])
		JIT=no
	else
		LIBCXXFLAGS="`$LLVM_CONFIG --cxxflags` $CXXFLAGS"
		ADD_LIBS="$ADD_LIBS `$LLVM_CONFIG --libs all`";
		LDFLAGS="`$LLVM_CONFIG --ldflags` $LDFLAGS";
		JIT=yes
		AC_DEFINE(HAVE_LLVM, 1, [Set to 1 if you have LLVM installed])
	fi
fi


AM_CONDITIONAL([HAVE_BPF_CAPTURE], [test "$ac_cv_have_decl_BIOCSETIF" = yes ])
AM_CONDITIONAL([HAVE_DAG], [test "$libtrace_dag" = true])
AM_CONDITIONAL([DAG2_4], [test "$libtrace_dag_version" = 24])
AM_CONDITIONAL([DAG2_5], [test "$libtrace_dag_version" = 25])
#AM_CONDITIONAL([DAG3_0], [test "$libtrace_dag_version" = 30])
AM_CONDITIONAL([HAVE_ZLIB], [test "$ac_cv_lib_z_deflate" = yes])
AM_CONDITIONAL([HAVE_BZLIB], [test "$ac_cv_lib_bz2_BZ2_bzDecompressInit" = yes])
AM_CONDITIONAL([HAVE_LZO], [test "$ac_cv_lib_lzo2_lzo1x_1_compress" = yes])
AM_CONDITIONAL([HAVE_NETPACKET_PACKET_H], [test "$libtrace_netpacket_packet_h" = true])
AM_CONDITIONAL([HAVE_LIBGDC], [test "$ac_cv_header_gdc_h" = yes])
AM_CONDITIONAL([HAVE_LLVM], [test "x$JIT" != "xno" ])
AM_CONDITIONAL([HAVE_NCURSES], [test "x$have_ncurses" = "xyes"])

# Check for miscellaneous programs
AC_CHECK_PROG([libtrace_doxygen], [doxygen], [true], [false])

AM_CONDITIONAL(HAS_DOXYGEN, [test x"$libtrace_doxygen" = xtrue])

AC_SUBST([ADD_LIBS])
AC_SUBST([ADD_LDFLAGS])
AC_SUBST([ADD_INCLS])
AC_SUBST([LTLIBOBJS])
AC_SUBST([MANPAGES])
AC_SUBST([PACKAGE_VERSION])
AC_SUBST([LIBTRACE_MAJOR])
AC_SUBST([LIBTRACE_MID])
AC_SUBST([LIBTRACE_MINOR])
AC_SUBST([DAG_VERSION_NUM])
AC_SUBST([HAVE_BPF_CAPTURE])
AC_SUBST([HAVE_LIBGDC])
AC_SUBST([HAVE_LLVM])
AC_SUBST([HAVE_NCURSES])
AC_SUBST([LIBCFLAGS])
AC_SUBST([LIBCXXFLAGS])
dnl and finally, output our Makefiles
AC_OUTPUT

reportopt() {
	if test x"$2" = xtrue -o x"$2" = xyes; then
		AC_MSG_NOTICE([$1: Yes])
	else 
		AC_MSG_NOTICE([$1: No])
	fi
}

echo
AC_MSG_NOTICE([Libtrace version $PACKAGE_VERSION])
reportopt "Compiled with PCAP 0.8 support" $ac_cv_lib_pcap_pcap_next_ex
reportopt "Compiled with compressed trace (zlib) support" $ac_cv_lib_z_deflate
reportopt "Compiled with compressed trace (bz2) support" $ac_cv_lib_bz2_BZ2_bzDecompressInit
reportopt "Compiled with compressed trace (lzo write only) support" $ac_cv_lib_lzo2_lzo1x_1_compress
if test x"$libtrace_dag" = xtrue; then
	if test "$libtrace_dag_version" = 24; then
		AC_MSG_NOTICE([Compiled with DAG live capture support: 2.4])
	elif test "$libtrace_dag_version" = 30; then
		AC_MSG_NOTICE([Compiled with DAG live capture support: 3.0])
	else
		AC_MSG_NOTICE([Compiled with DAG live capture support: 2.5])
	fi	
else
	AC_MSG_NOTICE([Compiled with DAG live capture support: No])
fi
reportopt "Compiled with LLVM BPF JIT support" $JIT
reportopt "Building man pages/documentation" $libtrace_doxygen
reportopt "Building tracetop (requires libncurses)" $have_ncurses

echo 
ac_cv_errcount=0;
if test -z "$YACC"; then
	AC_MSG_WARN(bison or yacc not found. Please install bison before continuing)
	ac_cv_errcount=$((ac_cv_errcount + 1))
fi

if test -z "$LEXLIB"; then
	AC_MSG_WARN(flex or lex not found. Please install flex before continuing)
	ac_cv_errcount=$((ac_cv_errcount + 1))
fi

if test $ac_cv_errcount -gt 0; then
	AC_MSG_ERROR(Critical packages are missing and compilation will fail. Please install the packages listed above and rerun ./configure)
fi