configure.ac

# configure.ac
# Copyright (C) 1999 Robert Bihlmeyer <robbe@orcus.priv.at>
# Copyright (C) 2001, 2002, 2003, 2004, 2007, 2015, 2016 g10 Code GmbH
#
# This file is part of PINENTRY.
#
# PINENTRY is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# PINENTRY is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses/>.
# SPDX-License-Identifier: GPL-2.0+

# (Process this file with autoconf to produce a configure script.)
AC_PREREQ([2.69])
min_automake_version="1.14"

# To build a release you need to create a tag with the version number
# (git tag -s pinentry-n.m.k) and run "./autogen.sh --force".  Please
# bump the version number immediately after the release and do another
# commit and push so that the git magic is able to work.
m4_define([mym4_package],[pinentry])
m4_define([mym4_major], [1])
m4_define([mym4_minor], [3])
m4_define([mym4_micro], [2])

# Below is m4 magic to extract and compute the git revision number,
# the decimalized short revision number, a beta version string and a
# flag indicating a development version (mym4_isbeta).  Note that the
# m4 processing is done by autoconf and not during the configure run.
m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \
                           mym4_package mym4_major mym4_minor mym4_micro),[:]))
m4_define([mym4_isbeta],       m4_argn(2, mym4_verslist))
m4_define([mym4_version],      m4_argn(4, mym4_verslist))
m4_define([mym4_revision],     m4_argn(7, mym4_verslist))
m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))
m4_esyscmd([echo ]mym4_version[>VERSION])

AC_INIT([mym4_package],[mym4_version],[https://bugs.gnupg.org])

AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_SRCDIR(pinentry/pinentry.h)
AM_INIT_AUTOMAKE([serial-tests dist-bzip2 no-dist-gzip])

AC_USE_SYSTEM_EXTENSIONS

AM_MAINTAINER_MODE

AC_CANONICAL_HOST

AH_TOP([
#ifndef PINENTRY_CONFIG_H_INCLUDED
#define PINENTRY_CONFIG_H_INCLUDED

/* Enable gpg-error's strerror macro under W32CE.  */
#define GPG_ERR_ENABLE_ERRNO_MACROS 1
])

AH_BOTTOM([
#endif /*PINENTRY_CONFIG_H_INCLUDED*/
])


dnl Checks for programs.
AC_PROG_MAKE_SET
AM_SANITY_CHECK
missing_dir=`cd $ac_aux_dir && pwd`
AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
AC_PROG_CC
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_RANLIB
# We need to check for cplusplus here because we may not do the test
# for Qt and autoconf does does not allow that.
AC_PROG_CXX
AC_PROG_LN_S
PKG_PROG_PKG_CONFIG
AC_CHECK_TOOL(WINDRES, windres, :)
AC_CHECK_PROGS(GITLOG_TO_CHANGELOG, gitlog-to-changelog,
               [build-aux/gitlog-to-changelog])


have_dosish_system=no
have_w32_system=no
have_w32ce_system=no
case "${host}" in
    *-mingw32*)
        AC_DEFINE(USE_ONLY_8DOT3,1,
                  [Set this to limit filenames to the 8.3 format])
        have_dosish_system=yes
        have_w32_system=yes
        case "${host}" in
          *-mingw32ce*)
            have_w32ce_system=yes
            ;;
          *)
            AC_DEFINE(HAVE_DRIVE_LETTERS,1,
                      [Defined if the OS supports drive letters.])
            ;;
        esac
        ;;
    i?86-emx-os2 | i?86-*-os2*emx )
        # OS/2 with the EMX environment
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        have_dosish_system=yes
        ;;

    i?86-*-msdosdjgpp*)
        # DOS with the DJGPP environment
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        have_dosish_system=yes
        ;;
esac

if test "$have_dosish_system" = yes; then
   AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
             [Defined if we run on some of the PCDOS like systems
              (DOS, Windoze. OS/2) with special properties like
              no file modes])
fi
AM_CONDITIONAL(HAVE_DOSISH_SYSTEM, test "$have_dosish_system" = yes)

if test "$have_w32_system" = yes; then
   AC_DEFINE(HAVE_W32_SYSTEM,1, [Defined if we run on a W32 API based system])
fi
AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)




dnl Checks for compiler features.
if test "$GCC" = yes; then
    # Check whether gcc does not emit a diagnositc for unknown -Wno-*
    # options.  This is the case for gcc >= 4.6
    AC_MSG_CHECKING([if gcc ignores unknown -Wno-* options])
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6 )
#kickerror
#endif]],[])],[_gcc_silent_wno=yes],[_gcc_silent_wno=no])
    AC_MSG_RESULT($_gcc_silent_wno)

    if test "$USE_MAINTAINER_MODE" = "yes"; then
        CFLAGS="$CFLAGS -Wall -Wcast-align -Wshadow -Wstrict-prototypes"
        CFLAGS="$CFLAGS -Wformat -Wno-format-y2k -Wformat-security"

        if test x"$_gcc_silent_wno" = xyes ; then
          _gcc_warn=yes
        else
          AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers])
          _gcc_cflags_save=$CFLAGS
          CFLAGS="-Wno-missing-field-initializers"
          AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
                            [_gcc_warn=yes],[_gcc_warn=no])
          AC_MSG_RESULT($_gcc_warn)
          CFLAGS=$_gcc_cflags_save;
        fi
        if test x"$_gcc_warn" = xyes ; then
          CFLAGS="$CFLAGS -W -Wno-sign-compare -Wno-missing-field-initializers"
        fi

        AC_MSG_CHECKING([if gcc supports -Wdeclaration-after-statement])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wdeclaration-after-statement"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_warn=yes,_gcc_warn=no)
        AC_MSG_RESULT($_gcc_warn)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_warn" = xyes ; then
          CFLAGS="$CFLAGS -Wdeclaration-after-statement"
        fi

        CPPFLAGS="$CPPFLAGS -Wundef"
    else
        # Not in maintainer mode: Use standard warnings.
        CFLAGS="$CFLAGS -Wall"
    fi

    CPPFLAGS="$CPPFLAGS -Wall"

    if test x"$_gcc_silent_wno" = xyes ; then
      _gcc_warn=yes
    else
      AC_MSG_CHECKING([if gcc supports -Wno-pointer-sign])
      _gcc_cflags_save=$CFLAGS
      CFLAGS="-Wno-pointer-sign"
      AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[_gcc_warn=yes],[_gcc_warn=no])
      AC_MSG_RESULT($_gcc_warn)
      CFLAGS=$_gcc_cflags_save;
    fi
    if test x"$_gcc_warn" = xyes ; then
       CFLAGS="$CFLAGS -Wno-pointer-sign"
    fi

    AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
    _gcc_cflags_save=$CFLAGS
    CFLAGS="-Wpointer-arith"
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_warn=yes,_gcc_warn=no)
    AC_MSG_RESULT($_gcc_warn)
    CFLAGS=$_gcc_cflags_save;
    if test x"$_gcc_warn" = xyes ; then
       CFLAGS="$CFLAGS -Wpointer-arith"
    fi
fi


# Checks for header files.
AC_CHECK_HEADERS(string.h unistd.h langinfo.h termio.h locale.h utime.h wchar.h)

dnl Checks for library functions.
AC_CHECK_FUNCS(seteuid stpcpy mmap stat)
GNUPG_CHECK_MLOCK

dnl Checks for standard types.
AC_TYPE_UINT32_T

# Common libraries and cflags.
COMMON_CFLAGS=
COMMON_LIBS=
AC_SUBST(COMMON_CFLAGS)
AC_SUBST(COMMON_LIBS)

dnl Checks for libgpg-error
#
# libgpg-error is a library with error codes shared between GnuPG
# related projects.
#
NEED_GPG_ERROR_VERSION=1.16
have_gpg_error=no

AM_PATH_GPG_ERROR("$NEED_GPG_ERROR_VERSION",
                  have_gpg_error=yes,have_gpg_error=no)
COMMON_CFLAGS="$GPG_ERROR_CFLAGS $COMMON_CFLAGS"
COMMON_LIBS="$GPG_ERROR_LIBS $COMMON_LIBS"

AC_DEFINE_UNQUOTED(GPG_ERR_ENABLE_GETTEXT_MACROS, 1,
                   [Under Windows we use the gettext code from libgpg-error])


dnl Checks for libassuan.
#
# libassuan is used for IPC
#
NEED_LIBASSUAN_API=2
NEED_LIBASSUAN_VERSION=2.1.0
have_libassuan=no
AM_PATH_LIBASSUAN("$NEED_LIBASSUAN_API:$NEED_LIBASSUAN_VERSION",
                  have_libassuan=yes,have_libassuan=no)
if test "$have_libassuan" = "yes"; then
  AC_DEFINE_UNQUOTED(GNUPG_LIBASSUAN_VERSION, "$libassuan_version",
                     [version of the libassuan library])
fi

COMMON_CFLAGS="$LIBASSUAN_CFLAGS $COMMON_CFLAGS"
COMMON_LIBS="$LIBASSUAN_LIBS $COMMON_LIBS"


dnl Checks for libsecmem.
AC_CHECK_TYPES([byte, ulong, u64])

dnl
dnl Check for curses pinentry program.
dnl
AC_ARG_ENABLE(pinentry-curses,
            AS_HELP_STRING([--enable-pinentry-curses],[build curses pinentry]),
            pinentry_curses=$enableval, pinentry_curses=maybe)
AC_ARG_ENABLE(fallback-curses,
            AS_HELP_STRING([--enable-fallback-curses],[include curses fallback]),
            fallback_curses=$enableval, fallback_curses=maybe)

dnl
dnl Checks for curses libraries.  Deal correctly with $pinentry_curses = maybe
dnl and $fallback_curses = maybe.
dnl
if test "$pinentry_curses" != "no" -o "$fallback_curses" != "no"; then
  IU_LIB_CURSES
fi
if test "$LIBCURSES"; then
  if test "$pinentry_curses" != "no"; then
    pinentry_curses=yes
  fi
  if test "$fallback_curses" != "no"; then
    fallback_curses=yes
    AC_DEFINE(FALLBACK_CURSES, 1,
     [The GUI pinentries should fall back to curses if X is not available.])
  fi
else
  if test "$pinentry_curses" = "yes" -o "$fallback_curses" = "yes"; then
    AC_MSG_ERROR([[
***
*** The curses library is required. The latest version of
*** ncurses is always available from ftp://ftp.gnu.org/gnu/ncurses/.
***]])
  fi
  pinentry_curses=no
  fallback_curses=no
fi
AM_CONDITIONAL(BUILD_LIBPINENTRY_CURSES,
              test "$pinentry_curses" = "yes" -o "$fallback_curses" = "yes")
AM_CONDITIONAL(BUILD_PINENTRY_CURSES, test "$pinentry_curses" = "yes")
AM_CONDITIONAL(FALLBACK_CURSES, test "$fallback_curses" = "yes")

if test "$pinentry_curses" = "yes"; then
  AC_DEFINE(PINENTRY_CURSES, 1,
           [The Curses version of Pinentry is to be build])
fi


dnl
dnl Check for tty pinentry program.
dnl
AC_ARG_ENABLE(pinentry-tty,
            AS_HELP_STRING([--enable-pinentry-tty],[build tty pinentry]),
            pinentry_tty=$enableval, pinentry_tty=maybe)
AM_CONDITIONAL(BUILD_PINENTRY_TTY, test "$pinentry_tty" = "yes")

if test "$pinentry_tty" = "yes"; then
  AC_DEFINE(PINENTRY_TTY, 1,
           [The TTY version of Pinentry is to be build])
fi


dnl
dnl Additional checks pinentry Curses.
dnl
if test "$pinentry_curses" = "yes" \
        -o "$fallback_curses" = "yes" ; then
  AM_ICONV
  if test "$am_cv_func_iconv" != "yes"; then
    AC_MSG_ERROR([[
***
*** The iconv function is required.  You can specify its location
*** using the --with-libiconv-prefix=PREFIX option to configure.
***]])
  fi
fi

dnl
dnl Check for emacs pinentry program.
dnl
AC_ARG_ENABLE(pinentry-emacs,
            AS_HELP_STRING([--enable-pinentry-emacs],[build emacs pinentry]),
            pinentry_emacs=$enableval, pinentry_emacs=no)
AC_ARG_ENABLE(inside-emacs,
            AS_HELP_STRING([--enable-inside-emacs],[include emacs hack]),
            inside_emacs=$enableval, inside_emacs=maybe)

if test "$pinentry_emacs" != "no" -o "$inside_emacs" != "no"; then
  AC_MSG_CHECKING([if Unix domain socket is supported])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/socket.h>
#include <sys/un.h>
]], [[int s = socket (AF_UNIX, SOCK_STREAM, 0);]])],[_unixsock_works=yes],[_unixsock_works=no])
  AC_MSG_RESULT($_unixsock_works)
  if test "$_unixsock_works" = "yes"; then
    if test "$pinentry_emacs" != "no"; then
      pinentry_emacs=yes
    fi
    if test "$inside_emacs" != "no"; then
      inside_emacs=yes
      AC_DEFINE(INSIDE_EMACS, 1,
                [The GUI pinentries should respect INSIDE_EMACS envvar.])
    fi
  else
    if test "$pinentry_emacs" = "yes" -o "$inside_emacs" = "yes"; then
      AC_MSG_ERROR([[
***
*** Support for Unix domain sockets is required.
***]])
    fi
    pinentry_emacs=no
    inside_emacs=no
  fi
fi

AM_CONDITIONAL(BUILD_LIBPINENTRY_EMACS,
              test "$pinentry_emacs" = "yes" -o "$inside_emacs" = "yes")
AM_CONDITIONAL(BUILD_PINENTRY_EMACS, test "$pinentry_emacs" = "yes")
AM_CONDITIONAL(INSIDE_EMACS, test "$inside_emacs" = "yes")

if test "$pinentry_emacs" = "yes"; then
  AC_DEFINE(PINENTRY_EMACS, 1,
            [The Emacs version of Pinentry is to be build])
  AC_MSG_WARN([pinentry-emacs is obsolete; Emacs version 26 or later never uses it.])
fi



dnl
dnl Check for EFL pinentry programs.
dnl
AC_ARG_ENABLE(pinentry-efl,
            AS_HELP_STRING([--enable-pinentry-efl],[build EFL pinentry]),
            pinentry_efl=$enableval, pinentry_efl=maybe)

if test "$pinentry_efl" != "no"; then
	PKG_CHECK_MODULES(
		EFL,
		[elementary >= 1.18,ecore-x],
		[
			pinentry_efl=yes
		],
		[
			if test "$pinentry_efl" = "yes"; then
			        AC_MSG_ERROR([[
***
*** efl (elementary >= 1.18, ecore-x) is required for pinentry-efl.
***]])
			else
				AC_MSG_WARN([pkg-config could not find the modules elementary or ecore-x])
			fi
                        pinentry_efl=no
		]
	)
fi
AM_CONDITIONAL(BUILD_PINENTRY_EFL, test "$pinentry_efl" = "yes")

dnl
dnl Check for GTK+-2 / GNOME3 pinentry programs.
dnl
AC_ARG_ENABLE(pinentry-gtk2,
            AS_HELP_STRING([--enable-pinentry-gtk2],[build GTK+-2 pinentry]),
            pinentry_gtk_2=$enableval, pinentry_gtk_2=maybe)

AC_ARG_ENABLE(pinentry-gnome3,
            AS_HELP_STRING([--enable-pinentry-gnome3],[build GNOME 3 pinentry]),
            pinentry_gnome_3=$enableval, pinentry_gnome_3=maybe)

dnl check if the module gtk+-2.0 exists
if test "$pinentry_gtk_2" != "no"; then
	PKG_CHECK_MODULES(
		GTK2,
		[gtk+-2.0 >= 2.12.0],
		[
			test "$pinentry_gtk_2" != "no" && pinentry_gtk_2=yes
			test "$pinentry_gnome_3" != "no" && pinentry_gnome_3=yes
		],
		[
			AC_MSG_WARN([pkg-config could not find the module gtk+-2.0])
			pinentry_gtk_2=no
		]
	)
fi
AM_CONDITIONAL(BUILD_PINENTRY_GTK_2, test "$pinentry_gtk_2" = "yes")

if test "$pinentry_gnome_3" != "no"; then
	PKG_CHECK_MODULES(
		GNOME3,
		[gcr-4],
		[
			pinentry_gnome_3=yes
			AC_DEFINE(GCR_API_SUBJECT_TO_CHANGE, 1, [Nod nod])
			AC_DEFINE(GCR_API_4, 1, [GCR API version])
		],
		[PKG_CHECK_MODULES(
			GNOME3,
			[gcr-base-3],
			[
				pinentry_gnome_3=yes
				AC_DEFINE(GCR_API_SUBJECT_TO_CHANGE, 1, [Nod nod])
			],
			[
				AC_MSG_WARN([pkg-config could not find the module gcr-4 or gcr-base-3])
				pinentry_gnome_3=no
			]
		)]
	)
fi

AM_CONDITIONAL(BUILD_PINENTRY_GNOME_3, test "$pinentry_gnome_3" = "yes")

dnl
dnl Check for libsecret.
dnl
AC_ARG_ENABLE(libsecret,
            AS_HELP_STRING([--enable-libsecret],
            [optionally cache passphrases using libsecret]),
            libsecret=$enableval, libsecret=maybe)

dnl check if the module libsecret exists
if test "$libsecret" != "no"; then
	PKG_CHECK_MODULES(
		LIBSECRET,
		[libsecret-1],
		[libsecret=yes],
		[
			AC_MSG_WARN([pkg-config could not find the module libsecret-1])
			libsecret=no
		]
	)
fi
AM_CONDITIONAL(BUILD_WITH_LIBSECRET, test "$libsecret" = "yes")
if test "$libsecret" = "yes"; then
  AC_DEFINE(HAVE_LIBSECRET, 1,
    [The pinentries should optionally cache the passphrase using libsecret.])

  COMMON_CFLAGS="$LIBSECRET_CFLAGS $COMMON_CFLAGS"
  COMMON_LIBS="$LIBSECRET_LIBS $COMMON_LIBS"
fi

dnl
dnl Check for libX11 library
dnl
have_x11=no
if test "$have_w32_system" != "yes"; then
	PKG_CHECK_MODULES(
		LIBX11,
		[x11],
		[have_x11=yes],
		[
			AC_MSG_WARN([pkg-config could not find the module x11])
			have_x11=no
		]
	)

	if test "$have_x11" = "yes"; then
		AC_DEFINE(HAVE_X11, 1,
			[The pinentries can optionally use x11.])
	fi
fi

dnl
dnl Check for KF5WaylandClient library
dnl
have_kf5waylandclient=no
if test "$have_w32_system" != "yes"; then
	PKG_CHECK_MODULES(
		KF5WAYLANDCLIENT,
		[KF5WaylandClient >= 5.60],
		[have_kf5waylandclient=yes],
		[
			AC_MSG_WARN([pkg-config could not find the module KF5WaylandClient])
			have_kf5waylandclient=no
		]
	)
fi

dnl
dnl Check for KF6GuiAddons library
dnl
have_kf6guiaddons=no
if test "$have_w32_system" != "yes"; then
	PKG_CHECK_MODULES(
		KF6GUIADDONS,
		[KF6GuiAddons >= 5.240],
		[have_kf6guiaddons=yes],
		[
			AC_MSG_WARN([pkg-config could not find the module KF6GuiAddons])
			have_kf6guiaddons=no
		]
	)
fi

dnl
dnl Check for Qt5 pinentry program.
dnl
AC_ARG_ENABLE(pinentry-qt5,
            AS_HELP_STRING([--enable-pinentry-qt5],[build Qt5 pinentry]),
            pinentry_qt5=$enableval, pinentry_qt5=maybe)


dnl
dnl Checks for qt libraries.  Deal correctly with $pinentry_qt5 = maybe.
dnl Tries to find Qt5
dnl
if test "$pinentry_qt5" != "no"; then
  FIND_QT5
  if test "$have_qt5_libs" != "yes"; then
    if test "$pinentry_qt5" = "yes"; then
        AC_MSG_ERROR([[
    ***
    *** Qt5 (Qt5Core, Qt5Gui, Qt5Widgets) is required.
    ***]])
    else
        pinentry_qt5=no
    fi
  fi
fi

AC_SUBST(PINENTRY_QT5_CFLAGS)
AC_SUBST(PINENTRY_QT5_LIBS)
AC_SUBST(PINENTRY_QT5_LDFLAGS)
AC_SUBST(MOC5)

dnl If we have come so far, qt5 pinentry can be build.
if test "$pinentry_qt5" != "no"; then
    pinentry_qt5=yes
fi
AM_CONDITIONAL(BUILD_PINENTRY_QT5, test "$pinentry_qt5" = "yes")
if test "$have_qt5_x11extras" = "yes"; then
  AC_DEFINE(PINENTRY_QT5_X11, 1, [pinentry-qt5 should use x11.])
else
  AC_DEFINE(PINENTRY_QT5_X11, 0, [pinentry-qt5 shouldn't use x11.])
fi
if test "$have_kf5waylandclient" = "yes"; then
  PINENTRY_QT5_CFLAGS="$KF5WAYLANDCLIENT_CFLAGS $PINENTRY_QT5_CFLAGS -fpic"
  PINENTRY_QT5_LIBS="$KF5WAYLANDCLIENT_LIBS $PINENTRY_QT5_LIBS"
  AC_DEFINE(PINENTRY_QT5_WAYLAND, 1, [pinentry-qt5 should use KF5WaylandClient.])
else
  if test "$have_w32_system" != "yes"; then
    AC_MSG_WARN([pinentry-qt5 will be built without Caps Lock warning on Wayland])
  fi
  AC_DEFINE(PINENTRY_QT5_WAYLAND, 0, [pinentry-qt5 shouldn't use KF5WaylandClient.])
fi

dnl
dnl Check for Qt6 pinentry program.
dnl
AC_ARG_ENABLE(pinentry-qt,
            AS_HELP_STRING([--enable-pinentry-qt],[build Qt6 pinentry]),
            pinentry_qt6=$enableval, pinentry_qt6=maybe)


dnl
dnl Checks for qt libraries.  Deal correctly with $pinentry_qt6 = maybe.
dnl Tries to find Qt6
dnl
if test "$pinentry_qt6" != "no"; then
  FIND_QT6
  if test "$have_qt6_libs" != "yes"; then
    if test "$pinentry_qt6" = "yes"; then
        AC_MSG_ERROR([[
    ***
    *** Qt6 (Qt6Core, Qt6Gui, Qt6Widgets) is required.
    ***]])
    else
        pinentry_qt6=no
    fi
  fi
fi

AC_SUBST(PINENTRY_QT6_CFLAGS)
AC_SUBST(PINENTRY_QT6_LIBS)
AC_SUBST(PINENTRY_QT6_LDFLAGS)
AC_SUBST(MOC6)

dnl If we have come so far, qt pinentry can be build.
if test "$pinentry_qt6" != "no"; then
    pinentry_qt6=yes
fi
AM_CONDITIONAL(BUILD_PINENTRY_QT6, test "$pinentry_qt6" = "yes")
if test "$have_kf6guiaddons" = "yes"; then
  PINENTRY_QT6_CFLAGS="$KF6GUIADDONS_CFLAGS $PINENTRY_QT6_CFLAGS"
  PINENTRY_QT6_LIBS="$KF6GUIADDONS_LIBS $PINENTRY_QT6_LIBS"
  AC_DEFINE(PINENTRY_KGUIADDONS, 1, [pinentry-qt should use KF6GuiAddons.])
else
  if test "$have_w32_system" != "yes"; then
    AC_MSG_WARN([pinentry-qt will be built without Caps Lock warning on Unix])
  fi
  AC_DEFINE(PINENTRY_KGUIADDONS, 0, [pinentry-qt shouldn't use KF6GuiAddons.])
fi

dnl
dnl Check for KF6WindowSystem library
dnl
have_kf6windowsystem=no
if test "$have_w32_system" != "yes" && test "$pinentry_qt6" = "yes"; then
	PKG_CHECK_MODULES(
		KF6WINDOWSYSTEM,
		[KF6WindowSystem >= 5.240],
		[have_kf6windowsystem=yes],
		[
			AC_MSG_WARN([pkg-config could not find the module KF6WindowSystem])
			have_kf6windowsystem=no
		]
	)
fi

if test "$have_kf6windowsystem" = "yes"; then
  PINENTRY_QT6_CFLAGS="$KF6WINDOWSYSTEM_CFLAGS $PINENTRY_QT6_CFLAGS"
  PINENTRY_QT6_LIBS="$KF6WINDOWSYSTEM_LIBS $PINENTRY_QT6_LIBS"
  AC_DEFINE(PINENTRY_KWINDOWSYSTEM, 1, [pinentry-qt should use KF6WindowSystem.])
else
  if test "$have_w32_system" != "yes"; then
    AC_MSG_WARN([pinentry-qt will be built without window parenting on wayland])
  fi
  AC_DEFINE(PINENTRY_KWINDOWSYSTEM, 0, [pinentry-qt shouldn't use KF6WindowSystem.])
fi

dnl
dnl Check for Qt4 pinentry program.
dnl
AC_ARG_ENABLE(pinentry-qt4,
            AS_HELP_STRING([--enable-pinentry-qt4],[build Qt4 pinentry]),
            pinentry_qt4=$enableval, pinentry_qt4=maybe)


dnl
dnl Checks for Qt4 libraries.  Deal correctly with $pinentry_qt4 = maybe.
dnl Tries to find Qt4
dnl
if test "$pinentry_qt4" != "no"; then
  FIND_QT4
  if test "$have_qt4_libs" != "yes"; then
    if test "$pinentry_qt4" = "yes"; then
        AC_MSG_ERROR([[
    ***
    *** Qt4 (QtCore, QtGui) is required.
    ***]])
    else
        pinentry_qt4=no
    fi
  fi
fi

AC_SUBST(PINENTRY_QT4_CFLAGS)
AC_SUBST(PINENTRY_QT4_LIBS)
AC_SUBST(PINENTRY_QT4_LDFLAGS)
AC_SUBST(MOC4)

dnl If we have come so far, qt4 pinentry can be build.
if test "$pinentry_qt4" != "no"; then
    pinentry_qt4=yes
fi
AM_CONDITIONAL(BUILD_PINENTRY_QT4, test "$pinentry_qt4" = "yes")

dnl
dnl Check for TQt pinentry program.
dnl
AC_ARG_ENABLE(pinentry-tqt,
	      AS_HELP_STRING([--enable-pinentry-tqt],[build tqt pinentry]),
	      pinentry_tqt=$enableval, pinentry_tqt=no)

if test "$pinentry_tqt" != "no"; then

  if test "$pinentry_qt5" = "yes" -o "$pinentry_qt4" = "yes"; then
    AC_MSG_ERROR([[
    ***
    *** Building both Qt and TQt pinentries is not supported.
    *** Use --disable-pinentry-qt and --disable-pinentry-qt4
    *** if you want the TQt pinentry.
    ***]])
  fi

  PKG_CHECK_MODULES(PINENTRY_TQT, tqt,
                    have_tqt_libs=yes,
                    [PKG_CHECK_MODULES(PINENTRY_TQT, tqt-mt,
                     have_tqt_libs=yes, have_tqt_libs=no)])

  if test "$have_tqt_libs" = "yes"; then
    AC_CHECK_TOOL([TQT_MOC], tqmoc, "no")
  fi

  if test "$have_tqt_libs" = "yes" -a "$TQT_MOC" != "no"; then
    pinentry_tqt=yes
  else
    AC_MSG_WARN([TQt is not found])
    pinentry_tqt=no
  fi

fi
AM_CONDITIONAL(BUILD_PINENTRY_TQT, test "$pinentry_tqt" = "yes")

#
# Check whether we should build the W32 pinentry.  This is actually
# the simplest check as we do this only for that platform.
#
pinentry_w32=no
test $have_w32_system = yes && pinentry_w32=yes
AM_CONDITIONAL(BUILD_PINENTRY_W32, test "$pinentry_w32" = "yes")

dnl
dnl Check for FLTK pinentry program.
dnl
AC_ARG_ENABLE(pinentry-fltk,
    AS_HELP_STRING([--enable-pinentry-fltk],[build FLTK 1.3 pinentry]),
           pinentry_fltk=$enableval, pinentry_fltk=maybe)

dnl check for fltk-config
if test "$pinentry_fltk" != "no"; then
   AC_PATH_PROG(FLTK_CONFIG, fltk-config, no)
   if test x"${FLTK_CONFIG}" = xno ; then
       AC_MSG_WARN([fltk-config is not found])
       pinentry_fltk=no
   fi
fi

dnl check for FLTK libraries and set flags
if test "$pinentry_fltk" != "no"; then
   AC_MSG_CHECKING([for FLTK 1.3])
   FLTK_VERSION=`${FLTK_CONFIG} --api-version`
   if test ${FLTK_VERSION} != "1.3" ; then
       AC_MSG_RESULT([no])
       AC_MSG_WARN([FLTK 1.3 not found (available $FLTK_VERSION)])
       pinentry_fltk=no
   else
       AC_MSG_RESULT([yes])
       FLTKCFLAGS=`${FLTK_CONFIG} --cflags`
       FLTKCXXFLAGS=`${FLTK_CONFIG} --cxxflags`
       FLTKLIBS=`${FLTK_CONFIG} --ldflags`
       AC_SUBST(FLTKCFLAGS)
       AC_SUBST(FLTKCXXFLAGS)
       AC_SUBST(FLTKLIBS)
       pinentry_fltk=yes
   fi
fi
AM_CONDITIONAL(BUILD_PINENTRY_FLTK, test "$pinentry_fltk" = "yes")

# Figure out the default pinentry.  We are very conservative here.
# Please change the order only after verifying that the preferred
# pinentry really is better (more feature-complete and more secure).

if test "$pinentry_gtk_2" = "yes"; then
  PINENTRY_DEFAULT=pinentry-gtk-2
else
  if test "$pinentry_qt6" = "yes"; then
    PINENTRY_DEFAULT=pinentry-qt
  else
    if test "$pinentry_qt5" = "yes"; then
      PINENTRY_DEFAULT=pinentry-qt5
    else
      if test "$pinentry_gnome_3" = "yes"; then
        PINENTRY_DEFAULT=pinentry-gnome3
      else
        if test "$pinentry_curses" = "yes"; then
          PINENTRY_DEFAULT=pinentry-curses
        else
          if test "$pinentry_tty" = "yes"; then
            PINENTRY_DEFAULT=pinentry-tty
          else
            if test "$pinentry_w32" = "yes"; then
              PINENTRY_DEFAULT=pinentry-w32
            else
              if test "$pinentry_fltk" = "yes"; then
                PINENTRY_DEFAULT=pinentry-fltk
              else
                if test "$pinentry_tqt" = "yes"; then
                  PINENTRY_DEFAULT=pinentry-tqt
                else
                  if test "$pinentry_efl" = "yes"; then
                    PINENTRY_DEFAULT=pinentry-efl
                  else
                    if test "$pinentry_qt4" = "yes"; then
                      PINENTRY_DEFAULT=pinentry-qt4
                    else
                      AC_MSG_ERROR([[No pinentry enabled.]])
                    fi
                  fi
                fi
              fi
            fi
          fi
        fi
      fi
    fi
  fi
fi
AC_SUBST(PINENTRY_DEFAULT)

#
# Print errors here so that they are visible all
# together and the user can acquire them all together.
#
die=no
if test "$have_gpg_error" = "no"; then
   die=yes
   AC_MSG_NOTICE([[
***
*** You need libgpg-error to build this program.
**  This library is for example available at
***   ftp://ftp.gnupg.org/gcrypt/libgpg-error
*** (at least version $NEED_GPG_ERROR_VERSION is required.)
***]])
fi

if test "$have_libassuan" = "no"; then
   die=yes
   AC_MSG_NOTICE([[
***
*** You need libassuan to build this program.
*** This library is for example available at
***   ftp://ftp.gnupg.org/gcrypt/libassuan/
*** (at least version $NEED_LIBASSUAN_VERSION (API $NEED_LIBASSUAN_API) is required).
***]])
fi

if test "$die" = "yes"; then
    AC_MSG_ERROR([[
***
*** Required libraries not found. Please consult the above messages
*** and install them before running configure again.
***]])
fi



#
# To avoid double inclusion of config.h which might happen at some
# places, we add the usual double inclusion protection at the top of
# config.h.
#
AH_TOP([
#ifndef GNUPG_CONFIG_H_INCLUDED
#define GNUPG_CONFIG_H_INCLUDED
])

#
# Stuff which goes at the bottom of config.h.
#
AH_BOTTOM([
#ifdef GPG_ERR_SOURCE_DEFAULT
# error GPG_ERR_SOURCE_DEFAULT already defined
#endif
#define GPG_ERR_SOURCE_DEFAULT  GPG_ERR_SOURCE_PINENTRY
#endif /*GNUPG_CONFIG_H_INCLUDED*/
])

build_doc=yes
AC_ARG_ENABLE([doc], AS_HELP_STRING([--disable-doc],
                                    [do not build the documentation]),
                     build_doc=$enableval, build_doc=yes)
AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno])


AC_CONFIG_FILES([
m4/Makefile
secmem/Makefile
pinentry/Makefile
curses/Makefile
tty/Makefile
efl/Makefile
emacs/Makefile
gtk+-2/Makefile
gnome3/Makefile
qt/Makefile
qt/icons/Makefile
qt5/Makefile
qt5/icons/Makefile
qt4/Makefile
tqt/Makefile
w32/Makefile
fltk/Makefile
doc/Makefile
Makefile
qt/org.gnupg.pinentry-qt.desktop
qt5/org.gnupg.pinentry-qt5.desktop
])

AC_OUTPUT

AC_MSG_NOTICE([

	Pinentry v${VERSION} has been configured as follows:

	Revision:  mym4_revision  (mym4_revision_dec)
	Platform:  $host

	Curses Pinentry ..: $pinentry_curses
	TTY Pinentry .....: $pinentry_tty
	Emacs Pinentry ...: $pinentry_emacs
	EFL Pinentry .....: $pinentry_efl
	GTK+-2 Pinentry ..: $pinentry_gtk_2
	GNOME 3 Pinentry .: $pinentry_gnome_3
	Qt6 Pinentry .....: $pinentry_qt6
	Qt5 Pinentry .....: $pinentry_qt5
	Qt4 Pinentry .....: $pinentry_qt4
	TQt Pinentry .....: $pinentry_tqt
	W32 Pinentry .....: $pinentry_w32
	FLTK Pinentry ....: $pinentry_fltk

	Fallback to Curses: $fallback_curses
	Emacs integration : $inside_emacs

	libsecret ........: $libsecret

	Default Pinentry .: $PINENTRY_DEFAULT
])