# Support for older autoconf without m4_esyscmd_s
m4_ifndef([m4_esyscmd_s], [m4_define([m4_chomp_all], [m4_format([[%.*s]], m4_bregexp(m4_translit([[$1]], [/], [/ ]), [/*$]), [$1])])])
m4_ifndef([m4_esyscmd_s], [m4_define([m4_esyscmd_s], [m4_chomp_all(m4_esyscmd([$1]))])])
AC_PREREQ([2.63])
AC_INIT([ebusd], m4_esyscmd_s([cat VERSION]), [ebusd@ebusd.eu], [ebusd], [https://github.com/john30/ebusd])

AC_CONFIG_AUX_DIR([build])
AC_CONFIG_MACRO_DIR([m4])

if test -z $CXXFLAGS; then
	CXXFLAGS="-fpic -Wall -Wno-unused-function -Wextra -g -O2"
fi
AC_PROG_CXX
AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])

AC_CHECK_HEADERS([arpa/inet.h \
		  dirent.h \
		  fcntl.h \
		  netdb.h \
		  poll.h \
		  pthread.h \
		  sys/ioctl.h \
		  sys/select.h \
		  sys/time.h \
		  time.h \
		  termios.h])

AC_CHECK_LIB([pthread], [pthread_setname_np],
	AC_DEFINE([HAVE_PTHREAD_SETNAME_NP], [1], [Defined if pthread_setname_np is available.]),
	AC_MSG_RESULT([Could not find pthread_setname_np in pthread.]))
EXTRA_LIBS=
AC_CHECK_LIB([rt], [clock_gettime], [EXTRA_LIBS+="-lrt"])
AC_SUBST(EXTRA_LIBS)

AC_CHECK_FUNC([pselect], [AC_DEFINE(HAVE_PSELECT, [1], [Defined if pselect() is available.])])
AC_CHECK_FUNC([ppoll], [AC_DEFINE(HAVE_PPOLL, [1], [Defined if ppoll() is available.])])

AC_ARG_ENABLE(coverage, AS_HELP_STRING([--enable-coverage], [enable code coverage tracking]), [CXXFLAGS+=" -coverage -O0"], [])
AC_ARG_WITH(contrib, AS_HELP_STRING([--without-contrib], [disable inclusion of contributed sources]), [], [with_contrib=yes])
if test "x$with_contrib" != "xno"; then
	AC_DEFINE_UNQUOTED(HAVE_CONTRIB, [1], [Defined if contributed sources are enabled.])
fi
AC_ARG_WITH(argp-lib, AS_HELP_STRING([--with-argp-lib=PATH], [path to argp libraries]), [LDFLAGS+="-L$with_argp_lib"])
AC_ARG_WITH(argp-include, AS_HELP_STRING([--with-argp-include=PATH], [path to argp includes]), [CXXFLAGS+="-I$with_argp_include"])
AC_CHECK_FUNC([argp_parse], [have_argp=yes], AC_CHECK_LIB([argp], [argp_parse], [have_argp=yes; LIBS="-largp $LIBS"], [have_argp=no]))
if test "x$have_argp" = "xyes"; then
	AC_CHECK_HEADER([argp.h], AC_DEFINE([HAVE_ARGP_H], [1], [Defined if argp.h is available.]), AC_MSG_ERROR([argp.h not found]))
else
	AC_MSG_ERROR([argp library not found, specify argp-standalone location in --with-argp-lib= and --with-argp-include= options.])
fi
AC_ARG_WITH(mqtt, AS_HELP_STRING([--without-mqtt], [disable support for MQTT handling]), [], [with_mqtt=yes])
if test "x$with_mqtt" != "xno"; then
	AC_CHECK_LIB([mosquitto], [mosquitto_lib_init],
		[AC_DEFINE_UNQUOTED(HAVE_MQTT, [1], [Defined if MQTT handling is enabled.])
		EXTRA_LIBS+=" -lmosquitto"],
		[AC_MSG_RESULT([Could not find mosquitto_lib_init in libmosquitto.])
		with_mqtt="no"])
fi
AM_CONDITIONAL([MQTT], [test "x$with_mqtt" != "xno"])

AC_MSG_CHECKING([for direct float format conversion])
AC_TRY_RUN(
	[
#include <stdint.h>
int main() {
	union {
		uint32_t i;
		float f;
	} test;
	test.f = 0.15;
	return test.i == 0x3e19999a ? 0 : 1;
}
	],
	[direct_float=1],
	[direct_float=],
	[direct_float=no],
)
if [[ "x$direct_float" == "x" ]]; then
AC_TRY_RUN(
	[
#include <stdint.h>
int main() {
	union {
		uint32_t i;
		float f;
	} test;
	test.f = 0.15;
	return test.i == 0x9a99193e ? 0 : 1;
}
	],
	[direct_float=2],
	[direct_float=no],
	[direct_float=no],
)
fi
if [[ "x$direct_float" == "xno" ]]; then
	AC_MSG_RESULT([no])
else
	AC_MSG_RESULT([yes])
	AC_DEFINE_UNQUOTED([HAVE_DIRECT_FLOAT_FORMAT], $direct_float, [Defined if direct conversion from float to int is available (2 for swapped byte order).])
fi

AC_CONFIG_SRCDIR([src/ebusd/main.cpp])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([Makefile
		docs/Makefile
		src/lib/utils/Makefile
		src/lib/ebus/Makefile
		src/lib/ebus/test/Makefile
		src/ebusd/Makefile
		src/tools/Makefile])
AM_CONDITIONAL([CONTRIB], [test "x$with_contrib" != "xno"])
AM_COND_IF([CONTRIB], [AC_CONFIG_FILES([
		src/lib/ebus/contrib/Makefile
		src/lib/ebus/contrib/test/Makefile
	])])

AC_DEFINE_UNQUOTED(PACKAGE_PIDFILE, LOCALSTATEDIR "/run/" PACKAGE ".pid", [The path and name of the PID file.])
AC_DEFINE_UNQUOTED(PACKAGE_LOGFILE, LOCALSTATEDIR "/log/" PACKAGE ".log", [The path and name of the log file.])
AC_DEFINE_UNQUOTED(PACKAGE_CONFIGPATH, SYSCONFDIR "/" PACKAGE, [The default path of the configuration files.])
AC_DEFINE(SCAN_VERSION, "[m4_esyscmd_s([sed -e 's#^\([0-9]*\.[0-9]*\).*#\1#' -e 's#\.\([0-9]\)$#0\1#' -e 's#\.##' VERSION])]", [The version of the package formatted for the scan result.])
AC_DEFINE(REVISION, "[m4_esyscmd_s([git describe --always 2>/dev/null || (date +p%Y%m%d)])]", [The revision of the package.])

AC_CHECK_PROGS([HAVE_DOXYGEN], [doxygen], [])
if test -z "$HAVE_DOXYGEN"; then
	AC_MSG_WARN([Doxygen not found - continuing without Doxygen support.])
fi

AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$HAVE_DOXYGEN"])
AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([docs/Doxyfile])])

AM_INIT_AUTOMAKE([1.11 -Wall -Werror foreign subdir-objects])

m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
AC_PROG_RANLIB

m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

AC_OUTPUT