AC_PREREQ([2.69])
AC_INIT([net-tools], [0.0.1], [])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIRS([m4])
AM_INIT_AUTOMAKE([foreign -Wall subdir-objects])

# Compiler: prefer clang
AC_PROG_CC
if test "x$GCC" = "xyes" && test "x$CC" = "xgcc"; then
	AC_CHECK_PROG([CLANG], [clang], [clang])
	if test -n "$CLANG"; then
		CC="clang"
		AC_MSG_NOTICE([Using clang])
	fi
fi
AM_PROG_AR
LT_PREREQ([2.2])
LT_INIT

# Strict flags — always enabled, not optional
STRICT_CFLAGS="-Wall -Wextra -Werror -Wpedantic -Wconversion -Wshadow"
AC_SUBST([STRICT_CFLAGS])

# libcli: Autotools submodule — configure automatically
AC_CONFIG_SUBDIRS([libcli])

# --enable-tests
AC_ARG_ENABLE([tests],
	[AS_HELP_STRING([--enable-tests], [Build Criterion unit tests (default: no)])],
	[enable_tests=$enableval],
	[enable_tests=no])
AM_CONDITIONAL([BUILD_TESTS], [test "x$enable_tests" = "xyes"])
AS_IF([test "x$enable_tests" = "xyes"], [
	PKG_CHECK_MODULES([CRITERION], [criterion], [], [
		AC_MSG_NOTICE([pkg-config could not find criterion -- trying manual detection])
		AC_CHECK_HEADER([criterion/criterion.h], [], [
			AC_MSG_ERROR([criterion/criterion.h not found])])
		AC_CHECK_LIB([criterion], [main],
			[CRITERION_LIBS="-lcriterion"],
			[AC_MSG_ERROR([libcriterion not found])])
	])
])

# --enable-debug
AC_ARG_ENABLE([debug],
	[AS_HELP_STRING([--enable-debug], [Enable debug build: -g -O0 (default: no)])],
	[enable_debug=$enableval],
	[enable_debug=no])
AM_CONDITIONAL([ENABLE_DEBUG], [test "x$enable_debug" = "xyes"])

# --enable-sanitizers
AC_ARG_ENABLE([sanitizers],
	[AS_HELP_STRING([--enable-sanitizers],
		[Enable AddressSanitizer and UndefinedBehaviorSanitizer (default: no)])],
	[enable_sanitizers=$enableval],
	[enable_sanitizers=no])
AM_CONDITIONAL([ENABLE_SANITIZERS], [test "x$enable_sanitizers" = "xyes"])

AC_CONFIG_FILES([
	Makefile
	src/Makefile
	src/ping/Makefile
	src/traceroute/Makefile
	tests/Makefile
])
AC_OUTPUT

AC_MSG_NOTICE([

	net-tools $VERSION
	------------------
	CC          : $CC
	CFLAGS      : $STRICT_CFLAGS
	tests       : $enable_tests
	debug       : $enable_debug
	sanitizers  : $enable_sanitizers
])