#!/bin/sh
# Mini configure script
# 26-01-2011

echo

MT_V="3.50.13"
MT_DATE="2025-12-06"

MT_VERSION="mtPaint $MT_V"
MT_LANG=YES
MT_MAN=YES
MT_POD=NO
MT_CPICK=mtpaint
MT_FPICK=mtpaint
MT_LISTS=2
MT_ANIM=Gifsicle
ICON_SET=icons1

GTK_FILE=_conf.txt
HELP=1

OS=
MARCH=
OPTS=YES
USE_THREADS=YES
AS_NEEDED=
DEFS=
WARN=

# Path overrides
MT_BINDIR=
MT_DATAROOT=
MT_DOCDIR=
MT_LOCDIR=
MT_MANDIR=
MT_PO=
MT_HOST=

# Initialize library-tracking vars
STATICLIBS=
for A in PNG JPEG JP2 TIFF WEBP FT CMS
do
	eval "N$A="
	eval "STATIC_$A="
	STATICLIBS="$STATICLIBS \$STATIC_$A"
done
GTK=
GTKVERSION=

# Prevent nasty surprises from locale
unset LC_ALL
export LC_COLLATE=C # LC_CTYPE=C LC_NUMERIC=C

for A in "$@"
do
	case "$A" in
	"staticpng" )	STATIC_PNG=PNG;;
	"jpeg" )	NJPEG=YES;;
	"nojpeg" )	NJPEG=NO;;
	"staticjpeg" )	STATIC_JPEG=JPEG;;
	"jp2v1" )	NJP2=OpenJPEG;;
	"jp2v2" )	NJP2=OpenJPEG2;;
	"jasper" )	NJP2=JasPer;;
	"nojp2" )	NJP2=NO;;
	"staticjp2" )	STATIC_JP2=JPEG2000;;
	"tiff" )	NTIFF=YES;;
	"notiff" )	NTIFF=NO;;
	"statictiff" )	STATIC_TIFF=TIFF;;
	"webp" )	NWEBP=YES;;
	"nowebp" )	NWEBP=NO;;
	"staticwebp" )	STATIC_WEBP=WebP;;
	"noft" )	NFT=NO;;
	"staticft" )	STATIC_FT=FreeType;;
	"lcms" )	NCMS=LittleCMS;;
	"lcms2" )	NCMS=LittleCMS2;;
	"nolcms" )	NCMS=NO;;
	"staticlcms" )	STATIC_CMS=LittleCMS;;
	"gtk1" )	GTK=1;;
	"gtk"[23]* )	GTK=2
			[ "$A" != "${A#gtk3}" ] && GTK=3
			# Override minor version of installed GTK+
			GTKVERSION="`echo "$A" | sed -e 's/gtk[23]\.\{0,1\}\([0-9]*\).*/\1/'`";;
	"intl" )	MT_LANG=YES;;
	"man" )		MT_MAN=YES;;
	"pod" )		MT_POD=YES;;
	"gtkfilesel" )	MT_FPICK=gtkfilesel;;
	"gtkcolsel" )	MT_CPICK=gtkcolsel;;
	"oldlists" )	MT_LISTS=1;;
	"imagick" )	MT_ANIM=ImageMagick;;
	"icons"* )	ICON_SET=$A;;
	"win" )		OS="MinGW/MSYS"
			GTK=2;;
	"cflags" )	OPTS=CFLAGS;;
	"386" )		MARCH='-march=i386';;
	"486" )		MARCH='-march=i486';;
	"586" )		MARCH='-march=i586';;
	"686" )		MARCH='-march=i686';;
	"--cpu="* )	MARCH="-march=${A#*=}";;
	"slow" )	OPTS=NO;;
	"debug" )	OPTS=DEBUG;;
	"release" )	OPTS=RELEASE;;
	"thread" )	USE_THREADS=YES;;
	"nothread" )	USE_THREADS=NO;;
	"asneeded" )	AS_NEEDED=-Wl,--as-needed;;
	"--help" )	HELP=0;;
	"--prefix="* )	MT_PREFIX="${A#*=}";;
	"--bindir="* )	MT_BINDIR="${A#*=}";;
	"--datarootdir="* )	MT_DATAROOT="${A#*=}";;
	"--docdir="* )	MT_DOCDIR="${A#*=}";;
	"--localedir="* )	MT_LOCDIR="${A#*=}";;
	"--mandir="* )	MT_MANDIR="${A#*=}";;
	"--host="* )	MT_HOST="${A#*=}";;
	"--fakeroot"* )	FAKE_ROOT="${A#*=}"
			FAKE_LL="${A%%=*}"
			FAKE_LL="${FAKE_LL#--fakeroot}";;
	"panic" )	WARN="-Wextra -Wno-missing-field-initializers -Wno-unused-parameter";;
	"flush" )	echo Clearing out directory to original state
			echo
			make clean
			echo
			rm $GTK_FILE
			rm po/mtpaint.pot
			rm -rf src/graphics
			exit;;
	"merge" )	xgettext src/*.c src/*.h --keyword=_ --keyword=__ -o po/mtpaint.pot
			cd po
			NEW_DIR=trans_
			mkdir $NEW_DIR`date +%d-%m-%Y-%H-%M-%S`
			for file in *.po
			do
				echo New file = $file-a
				mv "$file" "$file-a"
				msgmerge -N "$file-a" mtpaint.pot > "$file"
				mv "$file-a" $NEW_DIR*
			done
			rm mtpaint.pot
			mv $NEW_DIR* ../../old_trans
			exit;;
	"newpo" )	xgettext src/*.c src/*.h --keyword=_ --keyword=__ -o po/mtpaint.pot
			exit;;
	# Override variable
	[!=]*=* )	MT_VAR=${A%%=*}
			if [ "$MT_VAR" != "${MT_VAR#*[!A-Za-z0-9_]}" ]
			then
				echo "Invalid variable: '$MT_VAR'"
			else
				eval $MT_VAR=\${A#*=}
				export $MT_VAR
			fi;;
	* )		echo "Unrecognized option '$A'"
			exit;;
	esac
done

if [ "$HELP" = 0 ]
then

cat << 'EOF' ; exit
Usage: ./configure [OPTION] ... [VAR=VALUE] ...

Options:

win .............. Configure for Windows MinGW / MSYS
gtk1 ............. Configure for GTK+1
gtk2 ............. Configure for GTK+2
gtk2.VER ......... Configure for GTK+2, minor version VER
gtk3 ............. Configure for GTK+3
gtk3.VER ......... Configure for GTK+3, minor version VER
gtkfilesel ....... Use GtkFileSelection file picker
gtkcolsel ........ Use GtkColorSelection colour picker
oldlists ......... Use GtkList and GtkCList lists
imagick .......... Use ImageMagick for GIF animation tasks

thread ........... Use multithreading
nothread ......... Don't use multithreading

cflags ........... Use CFLAGS environment variable
--cpu= ........... Target a specific CPU, e.g. athlon-xp, x86-64
686 .............. Target 686 machines
586 .............. Target 586 machines
486 .............. Target 486 machines
386 .............. Target 386 machines
slow ............. Don't use compiler optimizations
asneeded ......... Use linker optimization --as-needed
release .......... Use the set of optimizations which work best for mtPaint code
debug ............ Include debugging info in binary
--host= .......... Cross-compile with a specific toolchain, e.g. i586-mingw32

staticpng ........ Statically link PNG library
jpeg ............. Use libjpeg
nojpeg ........... Don't use libjpeg
staticjpeg ....... Statically link JPEG library
jp2v1 ............ Use libopenjpeg
jp2v2 ............ Use libopenjpeg2
jasper............ Use libjasper
nojp2 ............ Don't use libopenjpeg and libjasper
staticjp2 ........ Statically link JPEG 2000 library
tiff ............. Use libtiff
notiff ........... Don't use libtiff
statictiff ....... Statically link TIFF library
webp ............. Use libwebp
nowebp ........... Don't use libwebp
staticwebp ....... Statically link WebP library
noft ............. Don't use FreeType
staticft ......... Statically link FreeType library
lcms ............. Use LittleCMS
lcms2............. Use LittleCMS2
nolcms ........... Don't use LittleCMS
staticlcms ....... Statically link LittleCMS library

intl ............. Use internationalized po files
man .............. Install the mtPaint man page

--fakeroot=DIR ... DIR = location of library and include files to use for cross-compilation
--fakeroot64=DIR . DIR = ... when targeting a 64-bit system
icons ............ Compile with alternative icon set - see ./src/icons1/README for details

--prefix=DIR ..... DIR = prefix location of all installs, e.g. /usr or /usr/local (default)
--bindir=DIR ..... DIR = location of bin file to install, ${prefix}/bin by default
--docdir=DIR ..... DIR = location of documentation to install, ${prefix}/share/doc/mtpaint by default
--localedir=DIR .. DIR = location of locale files to install, ${prefix}/share/locale by default
--mandir=DIR ..... DIR = location of man page to install, ${prefix}/share/man/man1 by default

panic ............ Enable rarely-useful warnings - developers only

flush ............ Flush directories to initial state
newpo ............ Create ./po/mtpaint.pot
merge ............ Update all po files with new strings - developers only

Environment variables:

CC ............... C compiler (defaults to gcc)
CFLAGS ........... C compiler flags (not recommended; for enabling better optimizations use 'release' option instead)
LDFLAGS .......... linker flags, e.g. -L<libdir>
CPPFLAGS ......... C preprocessor flags, e.g. -I<includedir>
CCLD ............. "test link" command (defaults to $CC -nostartfiles)


Default settings: GNU/Linux system, O2 optimizations, English only version,
mtpaint file picker, mtpaint colour picker.
pkg-config gtk+-2.0 is checked to determine GTK+2 availability in GNU/Linux

EOF

fi

### Detect the OS

if [ -n "$OS" ] ; then
	: # Do nothing
elif [ "$OSTYPE" = "msys" ] ; then
	OS="MinGW/MSYS"
elif [ "$OSTYPE" != "${OSTYPE#darwin}" ] ; then
	OS="Darwin"
elif [ -z "$MT_HOST" ] ; then
	OS="GNU/Linux"
elif [ "$MT_HOST" != "${MT_HOST%mingw32*}" ] ; then
	OS="MinGW/GNU/Linux"
else
	OS="Other/GNU/Linux"
fi

### Prepare to use selected icon set

mkdir -p src/graphics
cp src/$ICON_SET/*.xpm src/$ICON_SET/*.xbm src/graphics

### Choose which sub-makefiles to run

MAKE_DIRS=src
[ "$MT_LANG" = YES ] && MAKE_DIRS="$MAKE_DIRS po" # translations
[ "$MT_MAN" = YES ] && MAKE_DIRS="$MAKE_DIRS doc" # man page

### Setup directories

if [ "$OS" != "${OS#MinGW/}" ]
then
	EXEEXT=".exe"
	MT_PREFIX="${MT_PREFIX-/c/Program Files/mtPaint}"
else
	MT_PREFIX="${MT_PREFIX-/usr/local}"
fi
MT_BINDIR="${MT_BINDIR:-$MT_PREFIX/bin}"
MT_DATAROOT="${MT_DATAROOT:-$MT_PREFIX/share}"
MT_DOCDIR="${MT_DOCDIR:-$MT_DATAROOT/doc/mtpaint}"
MT_MANDIR="${MT_MANDIR:-$MT_DATAROOT/man}"
if [ "$OS" != "${OS#MinGW/}" ]
then
	MT_LOCDIR="${MT_LOCDIR:-$MT_BINDIR/locale}"
	# Want package-relative path on Windows
	MT_PKGDIR=${MT_BINDIR%/bin}
	[ "$MT_PKGDIR" = "$MT_BINDIR" ] && MT_PKGDIR=${MT_BINDIR%/lib}
	MT_PKGDIR="$MT_PKGDIR/"
	MT_PO="/"
	while [ "$MT_LOCDIR" = "${MT_LOCDIR#$MT_PKGDIR}" ]
	do
		MT_PO="/..$MT_PO"
		if [ "$MT_PKGDIR" = "${MT_PKGDIR%/[!/]*/}" ]
		then # Cannot relativize path - leave it be
			MT_PO=
			break
		fi
		MT_PKGDIR="${MT_PKGDIR%/[!/]*/}/"
	done
	MT_PO="$MT_PO${MT_LOCDIR#$MT_PKGDIR}"
else
	MT_LOCDIR="${MT_LOCDIR:-$MT_DATAROOT/locale}"
	MT_PO="$MT_LOCDIR"
fi

### Setup compiler

# Only GCC and GNU toolchain are fully supported at the time
# Clang is recognized mainly to avoid mixups with GCC version checks
# No support for GNU-incompatible linkers in fakeroot mode

INCLUDES=
LIBS=
if [ "$OS" != "${OS%GNU/Linux}" ] || [ "$OS" = "Darwin" ]
then
	CC=${CC:-`which ${MT_HOST:+$MT_HOST-}gcc`}
	PKG_CONFIG=${PKG_CONFIG:-${MT_HOST:+$MT_HOST-}pkg-config}
fi
CC=${CC:-gcc}
# Use compiler as linker in tests - this way, both accept "-Wl," in LDFLAGS
CCLD=${CCLD:-$CC -nostartfiles}
# Get compiler type
CCNAME=gcc # by default
$CC -v 2>&1 | grep -q "clang version" && CCNAME=clang
# Get compiler version
CCVER=`$CC -dumpfullversion -dumpversion`
# Get target architecture
CCARCH=`$CC -dumpmachine`
# For eternally misconfigured, Windows-hosted MinGW
[ "$CCARCH" != "${CCARCH#mingw32}" ] && CCARCH=i586-mingw32
# For any properly built toolchain
ARCH=${ARCH:-${CCARCH%%-*}}

if [ -n "$FAKE_ROOT" ] # A way to replace just some libraries, leaving others be
then
	PKGCONFIG () # Check both locations in turn
	{
		PKG_CONFIG_PATH= PKG_CONFIG_LIBDIR="$FAKE_ROOT/lib$FAKE_LL/pkgconfig" \
			pkg-config --define-variable=prefix="$FAKE_ROOT" "$@" \
			2> /dev/null || "$PKG_CONFIG" "$@"
	}
	MT_TESTLINK="$CCLD -L$FAKE_ROOT/lib$FAKE_LL -Wl,--unresolved-symbols=ignore-in-shared-libs $LDFLAGS"
	MT_TESTCOMP="$CC -std=c89 -fno-builtin -isystem $FAKE_ROOT/include $CPPFLAGS ${MT_TESTLINK#$CCLD}"
else
	PKGCONFIG ()
	{
		"$PKG_CONFIG" "$@"
	}
	MT_TESTLINK="$CCLD $LDFLAGS"
	MT_TESTCOMP="$CC -std=c89 -fno-builtin $CPPFLAGS $LDFLAGS"
fi

if [ "$OS" != "${OS%/MSYS}" ]
then
	MT_TESTLINK="redir -e /dev/null $MT_TESTLINK -L/lib"
	MT_TESTCOMP="redir -e /dev/null $MT_TESTCOMP -L/lib"
	INCLUDES="-I/include"
	LIBS="-L/lib"
fi
IS_LIB()
{
	$MT_TESTLINK -$1 -o _conf.tmp > /dev/null 2>&1
}
CAN_DO()
{
	echo "main() { $1; }" > _conf.c
	$MT_TESTCOMP _conf.c -o _conf.tmp > /dev/null 2>&1
}
HAVE_FUNC()
{
	CAN_DO "$1()"
}

FOLLOW_C_STD()
{
	echo "
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ > $1)"'
#error "Incompatible C language version"
#endif
int main(void) { return 0; }
' > _conf.c
	${MT_TESTCOMP%% -std=c89*}${MT_TESTCOMP#* -std=c89} _conf.c -o _conf.tmp > /dev/null 2>&1
}

HAVE_CC_VER()
{
	# First 2 parts of GCC or Clang version
	MT_VN0=${CCVER%%.*}
	MT_VN1=${CCVER#$MT_VN0}
	MT_VN0=${MT_VN0%%[!0-9]*}
	MT_VN1=${MT_VN1#.}
	MT_VN1=${MT_VN1%%[!0-9]*}

	# Compare them to given version
	[ ${1%%.*} -eq "$MT_VN0" ] && [ ${1#*.} -le "$MT_VN1" ] || \
		[ ${1%%.*} -lt "$MT_VN0" ]
}

HAVE_GCC_VER()
{
	[ "$CCNAME" = gcc ] && HAVE_CC_VER $1
}

HAVE_CLANG()
{
	[ "$CCNAME" = clang ]
}

HAVE_CLANG_VER()
{
	[ "$CCNAME" = clang ] && HAVE_CC_VER $1
}

### Detect libraries and functions

if CAN_DO "volatile int v, z; z = __sync_fetch_and_add(&v, 1)"
then
	DEFS="$DEFS -DHAVE__SFA"
fi

if HAVE_FUNC "mkdtemp"
then
	DEFS="$DEFS -DHAVE_MKDTEMP"
fi

if IS_LIB "ljpeg"
then
	NJPEG=${NJPEG:-YES}
fi
NJPEG=${NJPEG:-NO}

if IS_LIB "lopenjp2"
then
	NJP2=${NJP2:-OpenJPEG2}
fi
if IS_LIB "lm -lopenjpeg"
then
	NJP2=${NJP2:-OpenJPEG}
fi
if IS_LIB "ljasper"
then
	NJP2=${NJP2:-JasPer}
fi
NJP2=${NJP2:-NO}

if IS_LIB "ltiff"
then
	NTIFF=${NTIFF:-YES}
fi
NTIFF=${NTIFF:-NO}

if IS_LIB "lwebp"
then
	NWEBP=${NWEBP:-YES}
fi
NWEBP=${NWEBP:-NO}

if IS_LIB "lfreetype"
then
	NFT=${NFT:-YES}
fi
NFT=${NFT:-NO}

if IS_LIB "llcms2"
then
	NCMS=${NCMS:-LittleCMS2}
fi
if IS_LIB "llcms"
then
	NCMS=${NCMS:-LittleCMS}
fi
NCMS=${NCMS:-NO}

### Setup optimizations

if [ "$OPTS" = RELEASE ]
then
	# Target i386 when compiling for any x86 CPU with GCC;
	# this produces smallest *AND* fastest binary
# !!! Questionable, now; need retesting, and proper cross-configuring too
	# With Clang, target pentium4; no incompatible HW expected in the wild,
	# and anything lesser results in much slower code
	case $ARCH in
		i?86)	HAVE_CLANG && MARCH=${MARCH:--march=pentium4}
			MARCH=${MARCH:--march=i386};;
	esac
	CFLAGS="-O2 $MARCH"
	# Add optimizations which are proven to really make mtPaint code faster
	if HAVE_CLANG
	then : # Clang - no useful extra flags
	elif HAVE_GCC_VER 4.0
	then # GCC 4.x
		CFLAGS="$CFLAGS -fweb -fomit-frame-pointer -fmodulo-sched"
	else # GCC 3.x
		CFLAGS="$CFLAGS -fweb"
	fi
	# Do not add unneeded dependencies
	AS_NEEDED="-Wl,--as-needed"
	# Disable GTK+ debug code
	DEFS="$DEFS -DGTK_NO_CHECK_CASTS -DG_DISABLE_CAST_CHECKS"
elif [ "$OPTS" = DEBUG ]
then
	CFLAGS="-ggdb"
elif [ "$OPTS" = YES ]
then
	CFLAGS="-O2 $MARCH"
elif [ "$OPTS" = NO ]
then
	CFLAGS="$MARCH"
else # $OPTS = CFLAGS
	MARCH=
	# And leave CFLAGS alone
fi
# Set Windows-specific flags
if [ "$OS" != "${OS#MinGW/}" ]
then
	CFLAGS="-mms-bitfields $CFLAGS"
	LDFLAGS="-mwindows $LDFLAGS"
fi
# Revert the changed defaults in GCC 10 and Clang 11
{ HAVE_GCC_VER 10.0 || HAVE_CLANG_VER 11.0; } && CFLAGS="$CFLAGS -fcommon"
# Lock the C standard
FOLLOW_C_STD 201710 || CFLAGS="$CFLAGS -std=gnu17"
# Enable warnings
WARN="-Wall $WARN"
if HAVE_GCC_VER 4.0
then # Tell gcc 4.x to shut up
	WARN="$WARN -Wno-pointer-sign"
fi
if HAVE_GCC_VER 4.1
then # Tell gcc 4.1+ to shut up some more
	WARN="$WARN -Wno-int-to-pointer-cast -Wno-pointer-to-int-cast"
fi
if HAVE_GCC_VER 6.0
then # Tell gcc 6.x to stop misleading
	WARN="$WARN -Wno-misleading-indentation"
fi
if HAVE_GCC_VER 9.3
then # Tell gcc 9.3+ to cut it short
	WARN="$WARN -Wno-stringop-truncation -Wformat-truncation=0 -Wformat-overflow=0"
fi
if HAVE_CLANG
then # Tell Clang to clang less
	WARN="$WARN -Wno-pointer-sign -Wno-int-to-pointer-cast -Wno-string-plus-int"
fi
if HAVE_CLANG_VER 11.0
then # Tell Clang 11.x to clang yet less
	WARN="$WARN -Wno-pointer-to-int-cast -Wno-misleading-indentation"
fi
# Deterministic compile
SET_RANDSEED=
if HAVE_CLANG || HAVE_GCC_VER 3.3
then
	SET_RANDSEED='-frandom-seed=$*'
fi
# Apple linker
[ "$OS" = "Darwin" ] && AS_NEEDED=

### Setup libraries

MT_DLIBS=
MT_SLIBS=
LIB_NAME () # ( lib_ID , static_mode , libs )
{
	if [ "$2" ]
	then
		MT_SLIBS="$MT_SLIBS ${1:+-l$1}$3"
	else
		MT_DLIBS="$MT_DLIBS ${1:+-l$1}$3"
	fi
}

if [ "$NJP2" = OpenJPEG2 ]
then
	INCLUDES="$INCLUDES `PKGCONFIG libopenjp2 --cflags 2>/dev/null`" || \
		INCLUDES="$INCLUDES -I/usr/include/openjpeg-2.0"
	LIB_NAME openjp2 "$STATIC_JP2"
	DEFS="$DEFS -DU_JP2=2"
fi
if [ "$NJP2" = OpenJPEG ]
then
	INCLUDES="$INCLUDES `PKGCONFIG libopenjpeg1 --cflags 2>/dev/null`" || \
	INCLUDES="$INCLUDES `PKGCONFIG libopenjpeg --cflags 2>/dev/null`" || \
		INCLUDES="$INCLUDES -I/usr/include/openjpeg"
	LIB_NAME openjpeg "$STATIC_JP2"
	DEFS="$DEFS -DU_JP2"
	if [ "$STATIC_JP2" ] || [ "$OS" != "${OS#MinGW}" ]
	then
		DEFS="$DEFS -DOPJ_STATIC"
	fi
fi
if [ "$NJP2" = JasPer ]
then
	LIB_NAME jasper "$STATIC_JP2"
	DEFS="$DEFS -DU_JASPER"
fi
if [ "$NWEBP" = YES ]
then
	LIB_NAME webp "$STATIC_WEBP"
	DEFS="$DEFS -DU_WEBP"
fi
if [ "$NTIFF" = YES ]
then
	LIB_NAME tiff "$STATIC_TIFF"
	DEFS="$DEFS -DU_TIFF"
fi
if [ "$NJPEG" = YES ]
then
	LIB_NAME jpeg "$STATIC_JPEG"
	DEFS="$DEFS -DU_JPEG"
fi
if [ "$NFT" = YES ]
then
	DEFS="$DEFS -DU_FREETYPE"
	if [ "$OS" = "GNU/Linux" ] && which freetype-config > /dev/null 2>&1
	then # Do it the old way, for native builds on *very* old distros
		FT_INCLUDES="`freetype-config --cflags`"
		LIB_NAME "" "$STATIC_FT" "`freetype-config --libs`"
	elif [ "$OS" != "${OS%/MSYS}" ]
	then # pkg-config may be missing on Windows - hardcode its results
		FT_INCLUDES="-I/include/freetype2"
		LIB_NAME "" "$STATIC_FT" "-lfreetype -lz"
	else # Use pkg-config
		FT_INCLUDES="`PKGCONFIG freetype2 --cflags`"
		LIB_NAME "" "$STATIC_FT" "`PKGCONFIG freetype2 --libs`"
	fi
	# Remove irrelevant GLib2 headers when compiling for GTK+1
	if [ "$GTK" = 1 ]
	then
		for ZAD in $FT_INCLUDES
		do
			[ "$ZAD" = "${ZAD#*/glib-2.0}" ] && INCLUDES="$INCLUDES $ZAD"
		done
	else
		INCLUDES="$INCLUDES $FT_INCLUDES"
	fi
	# libiconv may be separate, or part of libc
	HAVE_FUNC "iconv_open" || LIB_NAME iconv "$STATIC_FT"
fi
if [ "$NCMS" = LittleCMS2 ]
then
	LIB_NAME lcms2 "$STATIC_CMS"
	DEFS="$DEFS -DU_LCMS=2"
fi
if [ "$NCMS" = LittleCMS ]
then
	LIB_NAME lcms "$STATIC_CMS"
	DEFS="$DEFS -DU_LCMS"
fi
if [ -n "$FAKE_ROOT" ]
then
	INCLUDES="$INCLUDES `PKGCONFIG libpng --cflags`"
	LIB_NAME "" "$STATIC_PNG" "`PKGCONFIG libpng --libs`"
else
	LIB_NAME png "$STATIC_PNG"
fi
LIB_NAME z "$STATIC_PNG"
LIB_NAME m
if [ "$MT_LANG" = YES ]
then
	HAVE_FUNC "gettext" || LIB_NAME intl
	DEFS="$DEFS -DU_NLS -DMT_LANG_DEST='\"$MT_PO\"'"
fi

# !!! Would be nice to subtract MT_SLIBS from MT_DLIBS first
LIBS="$LIBS $MT_DLIBS${MT_SLIBS:+ -Wl,-dn $MT_SLIBS -Wl,-dy}"

rm -f _conf.c _conf.tmp

### Setup GTK+

FOUND_GTK=
[ "$OS" != "${OS#MinGW/}" ] && GTK=2
[ "${GTK:-2}" = 2 ] && PKGCONFIG gtk+-2.0 --cflags > /dev/null 2>&1 && FOUND_GTK=2 GTK=2
[ "${GTK:-1}" = 1 ] && PKGCONFIG gtk+ --cflags > /dev/null 2>&1 && FOUND_GTK=1 GTK=1
[ "${GTK:-3}" = 3 ] && PKGCONFIG gtk+-3.0 --cflags > /dev/null 2>&1 && FOUND_GTK=3 GTK=3
GTK=${GTK:-1}

if [ "$USE_THREADS" = NO ] ; then
	THREADS=
elif [ "$GTK" -ge 2 ] ; then
	THREADS="gthread-2.0"
else # "$GTK" = 1
	THREADS="gthread"
fi

# !!! It is assumed that the nondefault install prefix is the one GTK+ lives in
if [ "$FOUND_GTK" = 3 ] && [ ${GTKVERSION:-12} -ge 12 ] &&
	PKGCONFIG --atleast-version=3.12 gtk+-3.0
then
	GTKPREFIX=`PKGCONFIG gtk+-3.0 --variable=prefix`
	INCLUDES="$INCLUDES `PKGCONFIG gtk+-3.0 $THREADS --cflags`"
	LIBS="$LIBS `PKGCONFIG gtk+-3.0 $THREADS --libs`"
elif [ "$FOUND_GTK" = 3 ]
then
	echo "GTK+3 versions prior to 3.12 are not and can not be supported"
	exit 1
elif [ "$FOUND_GTK" = 2 ]
then
	GTKPREFIX=`PKGCONFIG gtk+-2.0 --variable=prefix`
	INCLUDES="$INCLUDES `PKGCONFIG gtk+-2.0 $THREADS --cflags`"
	LIBS="$LIBS `PKGCONFIG gtk+-2.0 $THREADS --libs`"
elif [ "$FOUND_GTK" = 1 ]
then
# !!! Full equivalent to "gtk-config gtk" would be "pkg-config gtk+ gmodule",
# but for mtPaint, 'gmodule' is nothing but a nuisance anyway
	GTKPREFIX=`PKGCONFIG gtk+ --variable=prefix`
	INCLUDES="$INCLUDES `PKGCONFIG gtk+ $THREADS --cflags`"
	LIBS="$LIBS `PKGCONFIG gtk+ $THREADS --libs`"
elif [ "$GTK" = 2 ] && [ "$OS" != "${OS%/MSYS}" ]
then # Windows system w/o working pkg-config
	GTKPREFIX=/
	INCLUDES="$INCLUDES -I/include/gtk-2.0 -I/lib/gtk-2.0/include -I/include/atk-1.0 -I/include/pango-1.0 -I/include/freetype2 -I/include/glib-2.0 -I/lib/glib-2.0/include"
	LIBS="$LIBS -lgtk-win32-2.0 -lgdk-win32-2.0 -lpango-1.0 -lglib-2.0 -lgobject-2.0 -lgdk_pixbuf-2.0 ${THREADS:+-lgthread-2.0}"
elif [ "$GTK" = 1 ] && gtk-config --cflags > /dev/null
then # Very old GNU/Linux system
	GTKPREFIX=`gtk-config gtk --prefix`
	INCLUDES="$INCLUDES `gtk-config gtk $THREADS --cflags`"
	LIBS="$LIBS `gtk-config gtk $THREADS --libs | sed 's/-rdynamic//'`"
elif [ "$GTK" = 1 ]
then # Even older GNU/Linux system
	GTKPREFIX=/opt/gnome
	GTK_INCLUDE="-I$GTKPREFIX/include/gtk-1.2 -I$GTKPREFIX/include/glib-1.2 -I$GTKPREFIX/lib/glib/include -I/usr/X11R6/include"
	GTK_LIB="-L/usr/lib -L/usr/X11R6/lib -L$GTKPREFIX/lib -lgtk -lgdk -lgmodule -lglib -ldl -lXext -lX11 -lm"
	echo
	echo I have not been able to find gtk-config so I am assuming the following:
	echo
	echo GTK_INCLUDE = $GTK_INCLUDE
	echo GTK_LIB = $GTK_LIB
	echo
	echo If these values are not right for your system, edit the configure script
	echo
	INCLUDES="$INCLUDES $GTK_INCLUDE"
	LIBS="$LIBS $GTK_LIB"
else
	echo "Failed to find required GTK+$GTK libraries" 1>&2
	exit 1
fi

# Need to add this to use GTK+1 with GCC 5 or Clang
[ "$GTK" = 1 ] && { HAVE_CLANG || HAVE_GCC_VER 5.0; } && CFLAGS="$CFLAGS -std=gnu89"
# Also need to add "-lX11" on GTK+2/X systems
[ "$GTK" = 2 ] && [ "$LIBS" != "${LIBS#*gdk-x11}" ] && LIBS="$LIBS -lX11"
# Need the same on GTK+3/X systems even more
[ "$GTK" = 3 ] && PKGCONFIG gtk+-x11-3.0 && LIBS="$LIBS -lX11"
# GTK+ minor version to use
DEFS="$DEFS${GTKVERSION:+ -DGTK${GTK}VERSION=$GTKVERSION}"
# Widgets to use
if [ "$GTK" = 3 ]
then
	MT_LISTS=2		# GtkList & GtkCList are with us no more
	MT_FPICK=mtpaint	# Neither is GtkFileSelection
elif [ "$GTK" = 2 ]
then # GTK+3 compatible things need some compatibility
	[ ${GTKVERSION:-18} -lt 18 ] && MT_LISTS=1
	[ "$FOUND_GTK" != 2 ] || PKGCONFIG --atleast-version=2.18 gtk+-2.0 || MT_LISTS=1
else # GTK+1
	MT_LISTS=1
fi

# Stop the spam
[ "$GTK" = 2 ] && WARN="$WARN -Wno-deprecated-declarations"

### Set feature flags

[ "$USE_THREADS" = "YES" ] && DEFS="$DEFS -DU_THREADS"
if [ "$MT_FPICK" = mtpaint ]
then
	DEFS="$DEFS -DU_FPICK_MTPAINT"
else # "$MT_FPICK" = gtkfilesel
	DEFS="$DEFS -DU_FPICK_GTKFILESEL"
fi
if [ "$MT_CPICK" = mtpaint ]
then
	DEFS="$DEFS -DU_CPICK_MTPAINT"
else #	"$MT_CPICK" = gtkcolsel
	DEFS="$DEFS -DU_CPICK_GTK"
fi
[ "$MT_LISTS" = 1 ] && DEFS="$DEFS -DU_LISTS_GTK1"
[ "$MT_ANIM" = ImageMagick ] && DEFS="$DEFS -DU_ANIM_IMAGICK"
# mtPaint version
DEFS="$DEFS -DMT_VERSION='\"$MT_VERSION\"'"

### 

### Rebase the paths, for '--fakeroot' substitutions to work

FAKE_PATHS () # variable, key
{
	FAKE_KEYS=" "
	for A in $1
	do
		[ "$A" = "${A#$2/}" ] && continue
		for B in "$GTKPREFIX/include" "$GTKPREFIX/lib"\
			/usr/include /usr/lib /usr/local/include /usr/local/lib
		do
			[ "$A" != "${A#$2$B}" ] || continue
			C="$2$FAKE_ROOT${A#$2${B%/*}}"
			[ "$C" != "$A" ] && [ "$FAKE_KEYS" = "${FAKE_KEYS#* $C }" ] &&\
				FAKE_KEYS="$FAKE_KEYS$C "
			break
		done
	done
	echo "$FAKE_KEYS"
}
if [ "$FAKE_ROOT" ]
then
	# !!! Spaces in paths will NOT be well received here
	FAKE_PATHS "$LIBS" -L
	LIBS="-L$FAKE_ROOT/lib$FAKE_LL $FAKE_KEYS $LIBS"
	FAKE_PATHS "$INCLUDES" -I
	INCLUDES="-isystem $FAKE_ROOT/include $FAKE_KEYS $INCLUDES"
	AS_NEEDED="-Wl,--as-needed,--no-add-needed,--unresolved-symbols=ignore-in-shared-libs"
fi

### Write config

cat << CONFIG > "$GTK_FILE"
CC = $CC $WARN
EXEEXT = $EXEEXT
MT_VERSION=$MT_VERSION
MT_DATE=$MT_DATE
MT_PREFIX="$MT_PREFIX"
MT_DATAROOT="$MT_DATAROOT"
MT_LANG_DEST="$MT_LOCDIR"
MT_MAN_DEST="$MT_MANDIR"
LDFLAG = $AS_NEEDED $LIBS $LDFLAGS
CFLAG = $DEFS $INCLUDES $CPPFLAGS $CFLAGS
subdirs = $MAKE_DIRS
BIN_INSTALL="$MT_BINDIR"
SET_RANDSEED = $SET_RANDSEED
CONFIG

### Report config

eval STATICLIBS=\"$STATICLIBS\"
STATICLIBS=`echo -n "$STATICLIBS" | sed -e 's/  */ /g' -e 's/^ //'`
cat << CONFIG

---------------------
mtPaint Configuration
---------------------

-------
General
-------

    Version             $MT_V
    System              $OS
    Toolkit             GTK+$GTK${GTKVERSION:+.$GTKVERSION}
    Lists               GTK+$MT_LISTS
    File Picker         $MT_FPICK
    Colour Picker       $MT_CPICK
    Animation Package   $MT_ANIM
    Use FreeType        $NFT
    Use CMS             $NCMS
    Icon set            $ICON_SET
    Internationalized   $MT_LANG
    Multithreaded       $USE_THREADS

--------
Compiler
--------

    Optimizations       $OPTS
    CFLAGS              $CFLAGS
    LDFLAGS             ${AS_NEEDED:+$AS_NEEDED }$LDFLAGS
    Static libraries    ${STATICLIBS:-NONE}

----------
File Types
----------

    Use JPEG            $NJPEG
    Use JPEG 2000       $NJP2
    Use TIFF            $NTIFF
    Use WebP            $NWEBP

------------
Installation
------------

    Binary install      $MT_BINDIR
CONFIG
[ "$MT_LANG" = YES ] && cat << CONFIG
    Locale install      $MT_LOCDIR
    Locale program      $MT_PO
CONFIG
cat << CONFIG
    Install man page    $MT_MAN
CONFIG
[ "$MT_MAN" = YES ] && cat << CONFIG
    Man page install    $MT_MANDIR
CONFIG
echo