dnl
dnl Configuration script for the ESP Package Manager (EPM).
dnl
dnl Copyright © 1999-2020 by Michael R Sweet
dnl Copyright © 1999-2007 by Easy Software Products, all rights reserved.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 2, or (at your option)
dnl any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
dnl

AC_INIT([EPM],[4.5.1],[https://github.com/michaelrsweet/epm/issues],[epm],[https://www.msweet.org/epm])
AC_CONFIG_HEADER(config.h)

dnl Version number...
VERSION="AC_PACKAGE_VERSION"
VERNUMBER=450
AC_SUBST(VERSION)
AC_SUBST(VERNUMBER)
AC_DEFINE_UNQUOTED(EPM_VERSION, "ESP Package Manager v$VERSION")

dnl Get the build and host platforms and split the host_os value
AC_CANONICAL_BUILD
AC_CANONICAL_HOST

[host_os_name=`echo $host_os | sed -e '1,$s/[0-9.]*$//g'`]


dnl Clear default debugging options and set normal optimization by
dnl default unless the user asks for debugging specifically.

CFLAGS="${CFLAGS:=}"
CXXFLAGS="${CXXFLAGS:=}"
LDFLAGS="${LDFLAGS:=}"
AC_SUBST(LDFLAGS)

AC_ARG_WITH(archflags, [  --with-archflags=flags  specify architecture flags [[default=none]]],
	ARCHFLAGS="$withval",
	ARCHFLAGS="${ARCHFLAGS:=}")
AC_SUBST(ARCHFLAGS)

AC_ARG_ENABLE(debug, [  --enable-debug          turn on debugging, default=no])
AC_ARG_ENABLE(sanitizer, [  --enable-sanitizer      build with AddressSanitizer, default=no])

if test "x$enable_debug" = xyes; then
 	OPTIM="-g"
 	CSFLAGS=""
else
	OPTIM="-Os -g"
	CSFLAGS="-o runtime"
fi

AC_SUBST(CSFLAGS)
AC_SUBST(OPTIM)

AC_ARG_ENABLE(gui, [  --enable-gui            turn on GUI utilities, default=auto])

AC_ARG_WITH(docdir, [  --with-docdir=/dir      set directory for documentation
                          [[default=${datadir}/doc/epm]]],
	docdir="$withval",
	docdir="\${datadir}/doc/epm")

AC_SUBST(docdir)

AC_ARG_WITH(softwaredir, [  --with-softwaredir=/dir set directory for EPM uninstall files and init scripts
                          [[default=/etc/software]]],
	softwaredir="$withval",
	softwaredir="")

dnl Checks for programs...
AC_PROG_CC(clang cc gcc)
AC_PROG_CXX(clang++ c++ g++)
AC_PROG_RANLIB
AC_PATH_PROG(AR,ar)
AC_PATH_PROG(CHMOD,chmod)
AC_PATH_PROGS(CODE_SIGN, codesign true)
AC_PATH_PROG(CP,cp)
AC_PATH_PROG(GZIP,gzip)
if test x$GZIP = x; then
	AC_MSG_ERROR([GNU zip not found but required.])
fi
AC_PATH_PROGS(HTMLDOC, htmldoc echo)
AC_PROG_INSTALL
if test "$INSTALL" = "$ac_install_sh"; then
        # Use full path to install-sh script...
        INSTALL="`pwd`/install-sh -c"
fi
AC_PATH_PROG(MKDIR,mkdir)
AC_PATH_PROG(RM,rm)
AC_PATH_PROG(RPM,rpm)
AC_PATH_PROG(RPMBUILD,rpmbuild)
AC_PATH_PROG(STRIP,strip)

dnl Architecture checks...
AC_C_CONST
AC_C_CHAR_UNSIGNED

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_DIRENT
AC_CHECK_HEADER(strings.h,AC_DEFINE(HAVE_STRINGS_H))
AC_CHECK_HEADER(sys/mount.h,AC_DEFINE(HAVE_SYS_MOUNT_H))
AC_CHECK_HEADER(sys/param.h,AC_DEFINE(HAVE_SYS_PARAM_H))
AC_CHECK_HEADER(sys/statfs.h,AC_DEFINE(HAVE_SYS_STATFS_H))
AC_CHECK_HEADER(sys/vfs.h,AC_DEFINE(HAVE_SYS_VFS_H))

dnl Checks for string functions.
AC_CHECK_FUNCS(strcasecmp strdup strlcat strlcpy strncasecmp)
AC_CHECK_FUNCS(snprintf vsnprintf)
AC_SEARCH_LIBS(gethostname, socket)

if test "x$enable_gui" != xno; then
	AC_PATH_PROG(FLTKCONFIG,fltk-config)
else
	FLTKCONFIG=""
fi

if test "x$FLTKCONFIG" = x; then
	GUIS=""
	GUILIBS=""
	INSTALL_GUIS=""
	INSTALL_OSX=""

	AC_MSG_WARN([Sorry, setup GUI requires FLTK 1.1.x or later.])
else
	CXXFLAGS="`$FLTKCONFIG --cflags` ${CXXFLAGS}"
	GUIS="setup uninst"
	GUILIBS="`$FLTKCONFIG --use-images --ldstaticflags`"
	INSTALL_GUIS="install-guis"

	if test "$host_os_name" = darwin; then
		GUILIBS="$GUILIBS -framework Security"
		INSTALL_OSX="install-macos"
	else
		INSTALL_OSX=""
	fi
fi

AC_SUBST(INSTALL_GUIS)
AC_SUBST(INSTALL_OSX)
AC_SUBST(GUIS)
AC_SUBST(GUILIBS)

dnl Set the default compression value...
case "$host_os_name" in
	darwin* | *bsd* | linux* | sunos*)
		# macOS, *BSD, Linux, and Solaris come with gzip standard
		AC_DEFINE(EPM_COMPRESS, 1)
		;;

	*)
		# All other OS's do not.
		AC_DEFINE(EPM_COMPRESS, 0)
		;;
esac

dnl Update compiler options...
if test -n "$GCC"; then
	if test x$enable_sanitizer = xyes; then
		# Use -fsanitize=address with debugging...
		OPTIM="-g -fsanitize=address"
	else
		# Otherwise use the Fortify enhancements to catch any unbounded
		# string operations...
		CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
		CXXFLAGS="$CXXFLAGS -D_FORTIFY_SOURCE=2"
	fi

	# Add useful warning options...
	CFLAGS="-Wall -Wformat -Wno-format-y2k -Wunused $CFLAGS"
	CXXFLAGS="-Wall -Wformat -Wno-format-y2k -Wunused $CXXFLAGS"

	# See if GCC supports -Wno-format-truncation...
	AC_MSG_CHECKING(if GCC supports -Wno-format-truncation)
	OLDCFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Werror -Wno-format-truncation"
	AC_TRY_COMPILE(,,[
		CFLAGS="$OLDCFLAGS -Wno-format-truncation"
		CXXFLAGS="$CXXFLAGS -Wno-format-truncation"
		AC_MSG_RESULT(yes)],[
		AC_MSG_RESULT(no)
		CFLAGS="$OLDCFLAGS"])

	# See if GCC supports -fno-rtti...
	AC_MSG_CHECKING(if GCC supports -fno-rtti)
	OLDCFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -fno-rtti"
	AC_TRY_COMPILE(,,
		CXXFLAGS="$CXXFLAGS -fno-rtti"
		AC_MSG_RESULT(yes),
		AC_MSG_RESULT(no))
	CFLAGS="$OLDCFLAGS"

	# See if GCC supports -fno-exceptions...
	AC_MSG_CHECKING(if GCC supports -fno-exceptions)
	OLDCFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -fno-exceptions"
	AC_TRY_COMPILE(,,
		CXXFLAGS="$CXXFLAGS -fno-exceptions"
		AC_MSG_RESULT(yes),
		AC_MSG_RESULT(no))
	CFLAGS="$OLDCFLAGS"
fi

dnl Flags for "ar" command...
case $host_os_name in
        darwin* | *bsd*)
                ARFLAGS="-rc"
                ;;
        *)
                ARFLAGS="crs"
                ;;
esac

AC_SUBST(ARFLAGS)

dnl Fix "prefix" variable if it hasn't been specified...
if test "$prefix" = "NONE"; then
	prefix="/usr/local"
fi

dnl Fix "exec_prefix" variable if it hasn't been specified...
if test "$exec_prefix" = "NONE"; then
	exec_prefix="$prefix"
fi

dnl Fix "libdir" variable if it hasn't been specified...
if test "$libdir" = "\${exec_prefix}/lib"; then
	libdir="$exec_prefix/lib"
fi

dnl Fix "datarootdir" variable if it hasn't been specified...
if test "$datarootdir" = "\${prefix}/share"; then
	if test "$prefix" = "/"; then
		datarootdir="/usr/share"
	else
		datarootdir="$prefix/share"
	fi
fi

dnl Fix "datadir" variable if it hasn't been specified...
if test "$datadir" = "\${prefix}/share"; then
	if test "$prefix" = "/"; then
		datadir="/usr/share"
	else
		datadir="$prefix/share"
	fi
elif test "$datadir" = "\${datarootdir}"; then
	datadir="$datarootdir"
fi

dnl EPM_SOFTWARE needs special attention for the default location...
if test x$softwaredir = x; then
	EPM_SOFTWARE="/etc/software"
else
	EPM_SOFTWARE="$softwaredir"
fi

AC_DEFINE_UNQUOTED(EPM_SOFTWARE, "$EPM_SOFTWARE")
AC_SUBST(EPM_SOFTWARE)

AC_DEFINE_UNQUOTED(EPM_GZIP, "$GZIP")
AC_SUBST(EPM_GZIP)

AC_DEFINE_UNQUOTED(EPM_STRIP, "$STRIP")
AC_SUBST(EPM_STRIP)

AC_DEFINE_UNQUOTED(EPM_BINDIR, "$exec_prefix/bin")
AC_SUBST(EPM_BINDIR)

AC_DEFINE_UNQUOTED(EPM_LIBDIR, "$libdir/epm")
AC_SUBST(EPM_LIBDIR)

AC_DEFINE_UNQUOTED(EPM_DATADIR, "$datadir/epm")
AC_SUBST(EPM_DATADIR)

dnl Figure out the right option to use for the RPM build architecture...
if test "x$RPM" != x; then
	# It would be nice if Red Hat could make up its mind...
	rpmversion="`$RPM --version | awk '{print $3}' | awk -F. '{print $1 * 10000 + $2 * 100 + $3}'`"

	if test $rpmversion -lt 30000; then
		AC_DEFINE_UNQUOTED(EPM_RPMARCH, "--buildarch ")
	else
		if test $rpmversion -ge 40003; then
			AC_DEFINE_UNQUOTED(EPM_RPMARCH, "--target ")
		else
			AC_DEFINE_UNQUOTED(EPM_RPMARCH, "--target=")
		fi
	fi
fi

if test "x$RPMBUILD" != x; then
	AC_DEFINE_UNQUOTED(EPM_RPMBUILD, "$RPMBUILD")
	AC_DEFINE(EPM_RPMTOPDIR)
else
	if test "x$RPM" != x; then
		AC_DEFINE_UNQUOTED(EPM_RPMBUILD, "$RPM")
	else
		AC_DEFINE_UNQUOTED(EPM_RPMBUILD, "rpm")
	fi
fi

dnl Output the makefile, list file, and config header...
AC_OUTPUT(Makefile epm.list doc/Makefile)