AC_PREREQ(2.58)
AC_INIT([UpdateTool], [1.0.0], [], [], [https://dl-website.tld/utool.exe])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR([src/config.h.in])
AC_CONFIG_FILES([Makefile src/Makefile])

AC_CANONICAL_BUILD
AC_CANONICAL_HOST
if test x"$cross_compiling" != x"no"; then
	HOST_PREFIX="${host_alias}-"
	HOST_SUFFIX="-$host_alias"
	if test x"${build_alias}" = x; then
		AC_MSG_ERROR([Cross compile enabled but no --build *explicitly* specified. For example: --build=$(gcc -dumpmachine)])
	fi
else
	HOST_PREFIX=
	HOST_SUFFIX=
fi

AM_SILENT_RULES([yes])
AM_INIT_AUTOMAKE
AC_PROG_CXX
AC_PROG_INSTALL
AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_CHECK_HEADER_STDBOOL
AC_FUNC_VPRINTF
AC_FUNC_STAT
AC_CHECK_FUNCS([malloc calloc realloc free memcmp memchr memcpy memmove memset putc putwc raise rand signal sprintf strchr strcmp strcoll strcpy strerror strftime strlen strncmp strncpy strpbrk strspn strstr strtol strtoul tolower toupper towlower towupper ungetc ungetwc vfprintf wcschr wcscmp wcscoll wcscpy wcspbrk wcsspn wcsstr wcstol wcstoul fopen fgets fprintf fputs fread fwrite getc fputc isalnum isalpha isupper time mktime gmtime close fclose feof exit],,
	[AC_MSG_ERROR([Missing essential std functions.])])
AX_CXX_COMPILE_STDCXX_11(, [mandatory])

utool_major_version_number=1
utool_minor_version_number=0
utool_release_number=0
UTOOL_RELEASE=${utool_major_version_number}.${utool_minor_version_number}
UTOOL_VERSION=${UTOOL_RELEASE}.${utool_release_number}

AC_ARG_ENABLE([gui],
	[AS_HELP_STRING([--disable-gui], [Build the UpdateTool with a wxWidgets based GUI instead of a simple CLI (default enabled).])],,[ut_buildgui=yes])
ut_buildgui=$(echo ${ut_buildgui})
case ${ut_buildgui} in
	1|y|yes) ut_buildgui=yes ;;
	''|0|n|no) ut_buildgui= ;;
	*) AC_MSG_ERROR([unknown option '${ut_buildgui}' for --enable-gui]) ;;
esac

AC_ARG_ENABLE([host-wxwidgets],
	[AS_HELP_STRING([--enable-host-wxwidgets], [Use the system wxWidgets library instead of our own shipped in ./wxWidgets (not recommended).])],,
	[enable_host_wxwidgets=no])
enable_host_wxwidgets=$(echo ${enable_host_wxwidgets})
case ${enable_host_wxwidgets} in
	''|1|y|yes) enable_host_wxwidgets=yes ;;
	0|n|no) enable_host_wxwidgets= ;;
	*) AC_MSG_ERROR([unknown option '${enable_host_wxwidgets}' for --enable-host-wxwidgets]) ;;
esac
if test x"${ut_buildgui}" != x"yes"; then
	enable_host_wxwidgets=
fi
AC_MSG_CHECKING([for host wxWidgets])
if test x"${enable_host_wxwidgets}" != x; then
	AC_MSG_RESULT([${enable_host_wxwidgets}])
else
	AC_MSG_RESULT([disabled])
fi

if test x"${enable_host_wxwidgets}" != x"yes"; then
	if test "${cross_compiling}" != "no"; then
		utool_wxdir="wxWidgets-${host_alias}/"
	else
		utool_wxdir="wxWidgets-host/"
	fi
	AC_MSG_CHECKING([for wxWidgets])
	if ! test -d "${utool_wxdir}lib"; then
		AC_MSG_ERROR([Missing wxWidgets builddir ${utool_wxdir}: Please run \`./build_wxwidgets.sh ${host_alias:-host}\` first.])
	fi
	AC_MSG_RESULT([yes])
else
	utool_wxdir=""
fi

ut_cflags=""
ut_libs=""
PROGRAM_EXT=
case "${host}" in
	*-*-cygwin* | *-*-mingw32* )
		PROGRAM_EXT=".exe"
		ut_use_msw=yes
		ut_cflags="${ut_cflags} -D_UNICODE=1 -municode"
		ut_libs="${ut_libs} -static -lws2_32 -dynamic"
	;;
esac

if test x"${ut_buildgui}" = x"yes"; then
	if test x"${ut_use_msw}" = x"yes" -a x"${enable_host_wxwidgets}" = x"yes"; then
		AC_MSG_ERROR([Building UpdateTool for Windows based platforms is not supported with --enable-host-wxwidgets])
	fi
	AC_MSG_CHECKING([for wxWidgets version])
	wx_version=$(${utool_wxdir}wx-config --version-full)
	AC_MSG_RESULT([${wx_version}])
	AC_MSG_CHECKING([for wxWidgets CFLAGS])
	wx_cflags=$(${utool_wxdir}wx-config --cflags)
	AC_MSG_RESULT([yes])
	AC_MSG_CHECKING([for wxWidgets LIBS])
	wx_libs=$(${utool_wxdir}wx-config --libs std)
	AC_MSG_RESULT([yes])
fi

ut_cflags="${ut_cflags} -Wall -Wno-deprecated-declarations"
if `echo $CXXFLAGS $CFLAGS | grep " -O" >/dev/null`; then
	AC_MSG_WARN([CXXFLAGS/CFLAGS already contains -O flag; ignoring -Os])
else
	ut_cflags="${ut_cflags} -Os"
fi

AM_CONDITIONAL([UT_BUILDGUI], [test x"${ut_buildgui}" = xyes])
AC_SUBST([UT_CFLAGS], [${ut_cflags}])
AC_SUBST([UT_LIBS],   [${ut_libs}])
AC_SUBST([WX_CFLAGS], [${wx_cflags}])
AC_SUBST([WX_LIBS],   [${wx_libs}])

AC_CONFIG_HEADERS([src/config.h:src/config.h.in])
AC_OUTPUT

cat << EOF

UpdateTool was configured with:

	CFLAGS/CXXFLAGS..........: ${ut_cflags}
	Build GUI................: ${ut_buildgui:-disabled}
	Build for Windows........: ${ut_use_msw:-disabled}
	Host wxWidgets...........: ${enable_host_wxwidgets:-disabled}
	wxWidgets Version........: ${wx_version:-unknown}
	wxWidgets CFLAGS/CXXFLAGS: ${wx_cflags}
	wxWidgets LDFLAGS........: ${wx_libs}

EOF