bitcoin/build-aux/m4/bitcoin_qt.m4

dnl Copyright (c) 2013-2016 The Bitcoin Core developers
dnl Distributed under the MIT software license, see the accompanying
dnl file COPYING or http://www.opensource.org/licenses/mit-license.php.

dnl Helper for cases where a qt dependency is not met.
dnl Output: If qt version is auto, set bitcoin_enable_qt to false. Else, exit.
AC_DEFUN([BITCOIN_QT_FAIL],[
  if test "x$bitcoin_qt_want_version" = xauto && test "x$bitcoin_qt_force" != xyes; then
    if test "x$bitcoin_enable_qt" != xno; then
      AC_MSG_WARN([$1; bitcoin-qt frontend will not be built])
    fi
    bitcoin_enable_qt=no
    bitcoin_enable_qt_test=no
  else
    AC_MSG_ERROR([$1])
  fi
])

AC_DEFUN([BITCOIN_QT_CHECK],[
  if test "x$bitcoin_enable_qt" != xno && test "x$bitcoin_qt_want_version" != xno; then
    true
    $1
  else
    true
    $2
  fi
])

dnl BITCOIN_QT_PATH_PROGS([FOO], [foo foo2], [/path/to/search/first], [continue if missing])
dnl Helper for finding the path of programs needed for Qt.
dnl Inputs: $1: Variable to be set
dnl Inputs: $2: List of programs to search for
dnl Inputs: $3: Look for $2 here before $PATH
dnl Inputs: $4: If "yes", don't fail if $2 is not found.
dnl Output: $1 is set to the path of $2 if found. $2 are searched in order.
AC_DEFUN([BITCOIN_QT_PATH_PROGS],[
  BITCOIN_QT_CHECK([
    if test "x$3" != x; then
      AC_PATH_PROGS($1,$2,,$3)
    else
      AC_PATH_PROGS($1,$2)
    fi
    if test "x$$1" = x && test "x$4" != xyes; then
      BITCOIN_QT_FAIL([$1 not found])
    fi
  ])
])

dnl Initialize qt input.
dnl This must be called before any other BITCOIN_QT* macros to ensure that
dnl input variables are set correctly.
dnl CAUTION: Do not use this inside of a conditional.
AC_DEFUN([BITCOIN_QT_INIT],[
  dnl enable qt support
  AC_ARG_WITH([gui],
    [AS_HELP_STRING([--with-gui@<:@=no|qt5|auto@:>@],
    [build bitcoin-qt GUI (default=auto)])],
    [
     bitcoin_qt_want_version=$withval
     if test "x$bitcoin_qt_want_version" = xyes; then
       bitcoin_qt_force=yes
       bitcoin_qt_want_version=auto
     fi
    ],
    [bitcoin_qt_want_version=auto])

  AS_IF([test "x$with_gui" = xqt5_debug],
        [AS_CASE([$host],
                 [*darwin*], [qt_lib_suffix=_debug],
                 [*mingw*], [qt_lib_suffix=d],
                 [qt_lib_suffix= ]); bitcoin_qt_want_version=qt5],
        [qt_lib_suffix= ])

  AC_ARG_WITH([qt-incdir],[AS_HELP_STRING([--with-qt-incdir=INC_DIR],[specify qt include path (overridden by pkgconfig)])], [qt_include_path=$withval], [])
  AC_ARG_WITH([qt-libdir],[AS_HELP_STRING([--with-qt-libdir=LIB_DIR],[specify qt lib path (overridden by pkgconfig)])], [qt_lib_path=$withval], [])
  AC_ARG_WITH([qt-plugindir],[AS_HELP_STRING([--with-qt-plugindir=PLUGIN_DIR],[specify qt plugin path (overridden by pkgconfig)])], [qt_plugin_path=$withval], [])
  AC_ARG_WITH([qt-translationdir],[AS_HELP_STRING([--with-qt-translationdir=PLUGIN_DIR],[specify qt translation path (overridden by pkgconfig)])], [qt_translation_path=$withval], [])
  AC_ARG_WITH([qt-bindir],[AS_HELP_STRING([--with-qt-bindir=BIN_DIR],[specify qt bin path])], [qt_bin_path=$withval], [])

  AC_ARG_WITH([qtdbus],
    [AS_HELP_STRING([--with-qtdbus],
    [enable DBus support (default is yes if qt is enabled and QtDBus is found, except on Android)])],
    [use_dbus=$withval],
    [use_dbus=auto])

  dnl Android doesn't support D-Bus and certainly doesn't use it for notifications
  case $host in
    *android*)
      if test "x$use_dbus" != xyes; then
        use_dbus=no
      fi
    ;;
  esac

  AC_SUBST(QT_TRANSLATION_DIR,$qt_translation_path)
])

dnl Find Qt libraries and includes.
dnl
dnl   BITCOIN_QT_CONFIGURE([MINIMUM-VERSION])
dnl
dnl Outputs: See _BITCOIN_QT_FIND_LIBS
dnl Outputs: Sets variables for all qt-related tools.
dnl Outputs: bitcoin_enable_qt, bitcoin_enable_qt_dbus, bitcoin_enable_qt_test
AC_DEFUN([BITCOIN_QT_CONFIGURE],[
  qt_version=">= $1"
  qt_lib_prefix="Qt5"
  BITCOIN_QT_CHECK([_BITCOIN_QT_FIND_LIBS])

  dnl This is ugly and complicated. Yuck. Works as follows:
  dnl For Qt5, we can check a header to find out whether Qt is build
  dnl statically. When Qt is built statically, some plugins must be linked into
  dnl the final binary as well.
  dnl _BITCOIN_QT_CHECK_STATIC_PLUGIN does a quick link-check and appends the
  dnl results to QT_LIBS.
  BITCOIN_QT_CHECK([
  TEMP_CPPFLAGS=$CPPFLAGS
  TEMP_CXXFLAGS=$CXXFLAGS
  CPPFLAGS="$QT_INCLUDES $CPPFLAGS"
  CXXFLAGS="$PIC_FLAGS $CXXFLAGS"
  _BITCOIN_QT_IS_STATIC
  if test "x$bitcoin_cv_static_qt" = xyes; then
    _BITCOIN_QT_CHECK_STATIC_LIBS

    if test "x$qt_plugin_path" != x; then
      QT_LIBS="$QT_LIBS -L$qt_plugin_path/platforms"
      if test -d "$qt_plugin_path/accessible"; then
        QT_LIBS="$QT_LIBS -L$qt_plugin_path/accessible"
      fi
      if test -d "$qt_plugin_path/platforms/android"; then
        QT_LIBS="$QT_LIBS -L$qt_plugin_path/platforms/android -lqtfreetype -lEGL"
      fi
    fi

    AC_DEFINE(QT_STATICPLUGIN, 1, [Define this symbol if qt plugins are static])
    if test "x$TARGET_OS" != xandroid; then
      _BITCOIN_QT_CHECK_STATIC_PLUGIN([QMinimalIntegrationPlugin], [-lqminimal])
      AC_DEFINE(QT_QPA_PLATFORM_MINIMAL, 1, [Define this symbol if the minimal qt platform exists])
    fi
    if test "x$TARGET_OS" = xwindows; then
      _BITCOIN_QT_CHECK_STATIC_PLUGIN([QWindowsIntegrationPlugin], [-lqwindows])
      AC_DEFINE(QT_QPA_PLATFORM_WINDOWS, 1, [Define this symbol if the qt platform is windows])
    elif test "x$TARGET_OS" = xlinux; then
      _BITCOIN_QT_CHECK_STATIC_PLUGIN([QXcbIntegrationPlugin], [-lqxcb -lxcb-static])
      AC_DEFINE(QT_QPA_PLATFORM_XCB, 1, [Define this symbol if the qt platform is xcb])
    elif test "x$TARGET_OS" = xdarwin; then
      _BITCOIN_QT_CHECK_STATIC_PLUGIN([QCocoaIntegrationPlugin], [-lqcocoa])
      AC_DEFINE(QT_QPA_PLATFORM_COCOA, 1, [Define this symbol if the qt platform is cocoa])
    elif test "x$TARGET_OS" = xandroid; then
      QT_LIBS="-Wl,--export-dynamic,--undefined=JNI_OnLoad -lqtforandroid -ljnigraphics -landroid -lqtfreetype -lQt5EglSupport $QT_LIBS"
      AC_DEFINE(QT_QPA_PLATFORM_ANDROID, 1, [Define this symbol if the qt platform is android])
    fi
  fi
  CPPFLAGS=$TEMP_CPPFLAGS
  CXXFLAGS=$TEMP_CXXFLAGS
  ])

  if test "x$qt_bin_path" = x; then
    qt_bin_path="`$PKG_CONFIG --variable=host_bins Qt5Core 2>/dev/null`"
  fi

  if test "x$use_hardening" != xno; then
    BITCOIN_QT_CHECK([
    AC_MSG_CHECKING(whether -fPIE can be used with this Qt config)
    TEMP_CPPFLAGS=$CPPFLAGS
    TEMP_CXXFLAGS=$CXXFLAGS
    CPPFLAGS="$QT_INCLUDES $CPPFLAGS"
    CXXFLAGS="$PIE_FLAGS $CXXFLAGS"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
        #include <QtCore/qconfig.h>
        #ifndef QT_VERSION
        #  include <QtCore/qglobal.h>
        #endif
      ]],
      [[
        #if defined(QT_REDUCE_RELOCATIONS)
        choke
        #endif
      ]])],
      [ AC_MSG_RESULT(yes); QT_PIE_FLAGS=$PIE_FLAGS ],
      [ AC_MSG_RESULT(no); QT_PIE_FLAGS=$PIC_FLAGS]
    )
    CPPFLAGS=$TEMP_CPPFLAGS
    CXXFLAGS=$TEMP_CXXFLAGS
    ])
  else
    BITCOIN_QT_CHECK([
    AC_MSG_CHECKING(whether -fPIC is needed with this Qt config)
    TEMP_CPPFLAGS=$CPPFLAGS
    CPPFLAGS="$QT_INCLUDES $CPPFLAGS"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
        #include <QtCore/qconfig.h>
        #ifndef QT_VERSION
        #  include <QtCore/qglobal.h>
        #endif
      ]],
      [[
        #if defined(QT_REDUCE_RELOCATIONS)
        choke
        #endif
      ]])],
      [ AC_MSG_RESULT(no)],
      [ AC_MSG_RESULT(yes); QT_PIE_FLAGS=$PIC_FLAGS]
    )
    CPPFLAGS=$TEMP_CPPFLAGS
    ])
  fi

  BITCOIN_QT_PATH_PROGS([MOC], [moc-qt5 moc5 moc], $qt_bin_path)
  BITCOIN_QT_PATH_PROGS([UIC], [uic-qt5 uic5 uic], $qt_bin_path)
  BITCOIN_QT_PATH_PROGS([RCC], [rcc-qt5 rcc5 rcc], $qt_bin_path)
  BITCOIN_QT_PATH_PROGS([LRELEASE], [lrelease-qt5 lrelease5 lrelease], $qt_bin_path)
  BITCOIN_QT_PATH_PROGS([LUPDATE], [lupdate-qt5 lupdate5 lupdate],$qt_bin_path, yes)

  MOC_DEFS='-DHAVE_CONFIG_H -I$(srcdir)'
  case $host in
    *darwin*)
     BITCOIN_QT_CHECK([
       MOC_DEFS="${MOC_DEFS} -DQ_OS_MAC"
       base_frameworks="-framework Foundation -framework AppKit"
       AX_CHECK_LINK_FLAG([[$base_frameworks]],[QT_LIBS="$QT_LIBS $base_frameworks"],[AC_MSG_ERROR(could not find base frameworks)])
     ])
    ;;
    *mingw*)
       BITCOIN_QT_CHECK([
         AX_CHECK_LINK_FLAG([[-mwindows]],[QT_LDFLAGS="$QT_LDFLAGS -mwindows"],[AC_MSG_WARN(-mwindows linker support not detected)])
       ])
  esac


  dnl enable qt support
  AC_MSG_CHECKING([whether to build ]AC_PACKAGE_NAME[ GUI])
  BITCOIN_QT_CHECK([
    bitcoin_enable_qt=yes
    bitcoin_enable_qt_test=yes
    if test "x$have_qt_test" = xno; then
      bitcoin_enable_qt_test=no
    fi
    bitcoin_enable_qt_dbus=no
    if test "x$use_dbus" != xno && test "x$have_qt_dbus" = xyes; then
      bitcoin_enable_qt_dbus=yes
    fi
    if test "x$use_dbus" = xyes && test "x$have_qt_dbus" = xno; then
      AC_MSG_ERROR([libQtDBus not found. Install libQtDBus or remove --with-qtdbus.])
    fi
    if test "x$LUPDATE" = x; then
      AC_MSG_WARN([lupdate is required to update qt translations])
    fi
  ],[
    bitcoin_enable_qt=no
  ])
  if test x$bitcoin_enable_qt = xyes; then
    AC_MSG_RESULT([$bitcoin_enable_qt ($qt_lib_prefix)])
  else
    AC_MSG_RESULT([$bitcoin_enable_qt])
  fi

  AC_SUBST(QT_PIE_FLAGS)
  AC_SUBST(QT_INCLUDES)
  AC_SUBST(QT_LIBS)
  AC_SUBST(QT_LDFLAGS)
  AC_SUBST(QT_DBUS_INCLUDES)
  AC_SUBST(QT_DBUS_LIBS)
  AC_SUBST(QT_TEST_INCLUDES)
  AC_SUBST(QT_TEST_LIBS)
  AC_SUBST(QT_SELECT, qt5)
  AC_SUBST(MOC_DEFS)
])

dnl All macros below are internal and should _not_ be used from the main
dnl configure.ac.
dnl ----

dnl Internal. Check if the linked version of Qt was built as static libs.
dnl Requires: Qt5.
dnl Requires: INCLUDES and LIBS must be populated as necessary.
dnl Output: bitcoin_cv_static_qt=yes|no
AC_DEFUN([_BITCOIN_QT_IS_STATIC],[
  AC_CACHE_CHECK(for static Qt, bitcoin_cv_static_qt,[
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
        #include <QtCore/qconfig.h>
        #ifndef QT_VERSION
        #  include <QtCore/qglobal.h>
        #endif
      ]],
      [[
        #if !defined(QT_STATIC)
        choke
        #endif
      ]])],
      [bitcoin_cv_static_qt=yes],
      [bitcoin_cv_static_qt=no])
    ])
])

dnl Internal. Check if the link-requirements for a static plugin are met.
dnl
dnl _BITCOIN_QT_CHECK_STATIC_PLUGIN(PLUGIN, LIBRARIES)
dnl --------------------------------------------------
dnl
dnl Requires: INCLUDES and LIBS must be populated as necessary.
dnl Inputs: $1: A static plugin name.
dnl Inputs: $2: The libraries that resolve $1.
dnl Output: QT_LIBS is prepended or configure exits.
AC_DEFUN([_BITCOIN_QT_CHECK_STATIC_PLUGIN], [
  AC_MSG_CHECKING([for $1 ($2)])
  CHECK_STATIC_PLUGINS_TEMP_LIBS="$LIBS"
  LIBS="$2${qt_lib_suffix} $QT_LIBS $LIBS"
  AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <QtPlugin> Q_IMPORT_PLUGIN($1)]])],
    [AC_MSG_RESULT([yes]); QT_LIBS="$2${qt_lib_suffix} $QT_LIBS"],
    [AC_MSG_RESULT([no]); BITCOIN_QT_FAIL([$1 not found.])])
  LIBS="$CHECK_STATIC_PLUGINS_TEMP_LIBS"
])

dnl Internal. Check Qt static libs with PKG_CHECK_MODULES.
dnl
dnl _BITCOIN_QT_CHECK_STATIC_LIBS
dnl -----------------------------
dnl
dnl Inputs: no inputs.
dnl Outputs: QT_LIBS is prepended.
AC_DEFUN([_BITCOIN_QT_CHECK_STATIC_LIBS], [
  PKG_CHECK_MODULES([QTFONTDATABASE], [Qt5FontDatabaseSupport${qt_lib_suffix}], [QT_LIBS="-lQt5FontDatabaseSupport${qt_lib_suffix} $QT_LIBS"])
  PKG_CHECK_MODULES([QTEVENTDISPATCHER], [Qt5EventDispatcherSupport${qt_lib_suffix}], [QT_LIBS="-lQt5EventDispatcherSupport${qt_lib_suffix} $QT_LIBS"])
  PKG_CHECK_MODULES([QTTHEME], [Qt5ThemeSupport${qt_lib_suffix}], [QT_LIBS="-lQt5ThemeSupport${qt_lib_suffix} $QT_LIBS"])
  PKG_CHECK_MODULES([QTDEVICEDISCOVERY], [Qt5DeviceDiscoverySupport${qt_lib_suffix}], [QT_LIBS="-lQt5DeviceDiscoverySupport${qt_lib_suffix} $QT_LIBS"])
  PKG_CHECK_MODULES([QTACCESSIBILITY], [Qt5AccessibilitySupport${qt_lib_suffix}], [QT_LIBS="-lQt5AccessibilitySupport${qt_lib_suffix} $QT_LIBS"])
  PKG_CHECK_MODULES([QTFB], [Qt5FbSupport${qt_lib_suffix}], [QT_LIBS="-lQt5FbSupport${qt_lib_suffix} $QT_LIBS"])
  if test "x$TARGET_OS" = xlinux; then
    PKG_CHECK_MODULES([QTXCBQPA], [Qt5XcbQpa], [QT_LIBS="$QTXCBQPA_LIBS $QT_LIBS"])
  elif test "x$TARGET_OS" = xdarwin; then
    PKG_CHECK_MODULES([QTCLIPBOARD], [Qt5ClipboardSupport${qt_lib_suffix}], [QT_LIBS="-lQt5ClipboardSupport${qt_lib_suffix} $QT_LIBS"])
    PKG_CHECK_MODULES([QTGRAPHICS], [Qt5GraphicsSupport${qt_lib_suffix}], [QT_LIBS="-lQt5GraphicsSupport${qt_lib_suffix} $QT_LIBS"])
    PKG_CHECK_MODULES([QTCGL], [Qt5CglSupport${qt_lib_suffix}], [QT_LIBS="-lQt5CglSupport${qt_lib_suffix} $QT_LIBS"])
  fi
])

dnl Internal. Find Qt libraries using pkg-config.
dnl Outputs: All necessary QT_* variables are set.
dnl Outputs: have_qt_test and have_qt_dbus are set (if applicable) to yes|no.
AC_DEFUN([_BITCOIN_QT_FIND_LIBS],[
  BITCOIN_QT_CHECK([
    PKG_CHECK_MODULES([QT_CORE], [${qt_lib_prefix}Core${qt_lib_suffix} $qt_version], [],
                      [BITCOIN_QT_FAIL([${qt_lib_prefix}Core${qt_lib_suffix} $qt_version not found])])
  ])
  BITCOIN_QT_CHECK([
    PKG_CHECK_MODULES([QT_GUI], [${qt_lib_prefix}Gui${qt_lib_suffix} $qt_version], [],
                      [BITCOIN_QT_FAIL([${qt_lib_prefix}Gui${qt_lib_suffix} $qt_version not found])])
  ])
  BITCOIN_QT_CHECK([
    PKG_CHECK_MODULES([QT_WIDGETS], [${qt_lib_prefix}Widgets${qt_lib_suffix} $qt_version], [],
                      [BITCOIN_QT_FAIL([${qt_lib_prefix}Widgets${qt_lib_suffix} $qt_version not found])])
  ])
  BITCOIN_QT_CHECK([
    PKG_CHECK_MODULES([QT_NETWORK], [${qt_lib_prefix}Network${qt_lib_suffix} $qt_version], [],
                      [BITCOIN_QT_FAIL([${qt_lib_prefix}Network${qt_lib_suffix} $qt_version not found])])
  ])
  QT_INCLUDES="$QT_CORE_CFLAGS $QT_GUI_CFLAGS $QT_WIDGETS_CFLAGS $QT_NETWORK_CFLAGS"
  QT_LIBS="$QT_CORE_LIBS $QT_GUI_LIBS $QT_WIDGETS_LIBS $QT_NETWORK_LIBS"

  BITCOIN_QT_CHECK([
    PKG_CHECK_MODULES([QT_TEST], [${qt_lib_prefix}Test${qt_lib_suffix} $qt_version], [QT_TEST_INCLUDES="$QT_TEST_CFLAGS"; have_qt_test=yes], [have_qt_test=no])
    if test "x$use_dbus" != xno; then
      PKG_CHECK_MODULES([QT_DBUS], [${qt_lib_prefix}DBus $qt_version], [QT_DBUS_INCLUDES="$QT_DBUS_CFLAGS"; have_qt_dbus=yes], [have_qt_dbus=no])
    fi
  ])
])