dnl Process this file with autoconf to produce a configure script
AC_INIT([osmo-pcap],
	m4_esyscmd([./git-version-gen .tarball-version]),
	[openbsc-devel@lists.openbsc.org])

AM_INIT_AUTOMAKE([dist-bzip2])
AC_CONFIG_TESTDIR(tests)

CFLAGS="$CFLAGS -std=gnu11"

dnl kernel style compile messages
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

dnl include release helper
RELMAKE='-include osmo-release.mk'
AC_SUBST([RELMAKE])

dnl checks for programs
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_RANLIB

dnl check for pkg-config (explained in detail in libosmocore/configure.ac)
AC_PATH_PROG(PKG_CONFIG_INSTALLED, pkg-config, no)
if test "x$PKG_CONFIG_INSTALLED" = "xno"; then
        AC_MSG_WARN([You need to install pkg-config])
fi
PKG_PROG_PKG_CONFIG([0.20])

dnl checks for header files
AC_HEADER_STDC

AC_ARG_ENABLE(sanitize,
	[AS_HELP_STRING(
		[--enable-sanitize],
		[Compile with address sanitizer enabled],
	)],
	[sanitize=$enableval], [sanitize="no"])
if test x"$sanitize" = x"yes"
then
	CFLAGS="$CFLAGS -fsanitize=address -fsanitize=undefined"
	CPPFLAGS="$CPPFLAGS -fsanitize=address -fsanitize=undefined"
fi

AC_ARG_ENABLE(werror,
	[AS_HELP_STRING(
		[--enable-werror],
		[Turn all compiler warnings into errors, with exceptions:
		 a) deprecation (allow upstream to mark deprecation without breaking builds);
		 b) "#warning" pragmas (allow to remind ourselves of errors without breaking builds)
		]
	)],
	[werror=$enableval], [werror="no"])
if test x"$werror" = x"yes"
then
	WERROR_FLAGS="-Werror"
	WERROR_FLAGS+=" -Wno-error=deprecated -Wno-error=deprecated-declarations"
	WERROR_FLAGS+=" -Wno-error=cpp" # "#warning"
	CFLAGS="$CFLAGS $WERROR_FLAGS"
	CPPFLAGS="$CPPFLAGS $WERROR_FLAGS"
fi

# https://www.freedesktop.org/software/systemd/man/daemon.html
AC_ARG_WITH([systemdsystemunitdir],
     [AS_HELP_STRING([--with-systemdsystemunitdir=DIR], [Directory for systemd service files])],,
     [with_systemdsystemunitdir=auto])
AS_IF([test "x$with_systemdsystemunitdir" = "xyes" -o "x$with_systemdsystemunitdir" = "xauto"], [
     def_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
     AS_IF([test "x$def_systemdsystemunitdir" = "x"],
   [AS_IF([test "x$with_systemdsystemunitdir" = "xyes"],
    [AC_MSG_ERROR([systemd support requested but pkg-config unable to query systemd package])])
    with_systemdsystemunitdir=no],
   [with_systemdsystemunitdir="$def_systemdsystemunitdir"])])
AS_IF([test "x$with_systemdsystemunitdir" != "xno"],
      [AC_SUBST([systemdsystemunitdir], [$with_systemdsystemunitdir])])
AM_CONDITIONAL([HAVE_SYSTEMD], [test "x$with_systemdsystemunitdir" != "xno"])

AC_ARG_ENABLE([external_tests],
		AC_HELP_STRING([--enable-external-tests],
				[Include the VTY tests in make check [default=no]]),
		[enable_ext_tests="$enableval"],[enable_ext_tests="no"])
if test "x$enable_ext_tests" = "xyes" ; then
	AM_PATH_PYTHON
	AC_CHECK_PROG(OSMOTESTEXT_CHECK,osmotestvty.py,yes)
	 if test "x$OSMOTESTEXT_CHECK" != "xyes" ; then
		AC_MSG_ERROR([Please install osmocom-python to run the VTY tests.])
	fi
fi
AC_MSG_CHECKING([whether to enable VTY tests])
AC_MSG_RESULT([$enable_ext_tests])
AM_CONDITIONAL(ENABLE_EXT_TESTS, test "x$enable_ext_tests" = "xyes")

dnl Checks for typedefs, structures and compiler characteristics
AC_ARG_WITH([pcap-config],
	AC_HELP_STRING([--with-pcap-config=FILE], [Use given pcap-config]),
	[pcapcfg="$withval" ],
	[AC_PATH_PROG([pcapcfg], [pcap-config], [])])
if test x$pcapcfg = "x"; then
	AC_MSG_ERROR([pcap-config can not be found])
fi

dnl CentOS 5 and Debian 6.0 do not ship with a pcap-config and we somehow
dnl need to support these versions. Once we drop support for these two distros
dnl the below can be simplified again.
AC_ARG_VAR([PCAP_LIBS], [PCAP library files])
AC_ARG_VAR([PCAP_CFLAGS], [PCAP C compiler flags])

if test "x$ac_cv_env_PCAP_LIBS_set" != "xset"; then
	PCAP_LIBS=`$pcapcfg --libs`
fi

if test "x$ac_cv_env_PCAP_CFLAGS_set" != "xset"; then
	PCAP_CFLAGS=`$pcapcfg --cflags`
fi
AC_SUBST([PCAP_LIBS])
AC_SUBST([PCAP_CFLAGS])

dnl checks for libraries
PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.5.0)
PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.5.0)
PKG_CHECK_MODULES(LIBOSMOVTY, libosmovty >= 1.5.0)
PKG_CHECK_MODULES(LIBZMQ, libzmq >= 3.2.2)
PKG_CHECK_MODULES(LIBGNUTLS, gnutls)


# Coverage build taken from WebKit's configure.in
AC_MSG_CHECKING([whether to enable code coverage support])
AC_ARG_ENABLE(coverage,
              AC_HELP_STRING([--enable-coverage],
                             [enable code coverage support [default=no]]),
              [],[enable_coverage="no"])
AC_MSG_RESULT([$enable_coverage])
if test "$enable_coverage" = "yes"; then
   COVERAGE_CFLAGS="-ftest-coverage -fprofile-arcs"
   COVERAGE_LDFLAGS="-ftest-coverage -fprofile-arcs"
   AC_SUBST([COVERAGE_CFLAGS])
   AC_SUBST([COVERAGE_LDFLAGS])
fi

AM_CONFIG_HEADER(osmopcapconfig.h)

dnl Generate the output
AC_OUTPUT(
    include/Makefile
    include/osmo-pcap/Makefile
    src/Makefile
    contrib/Makefile
    contrib/systemd/Makefile
    contrib/osmo-pcap.spec
    doc/Makefile
    doc/examples/Makefile
    tests/Makefile
    Makefile)