#!/bin/sh
#
#  nspluginwrapper configure script (C) 2005-2007 Gwenole Beauchesne
#  derived from qemu configure script, (C) 2003 Fabrice Bellard
#
PACKAGE=nspluginwrapper

# set temporary file name
mkdir -p tmp
TMPDIR1="./tmp"

TMPC="${TMPDIR1}/npw-conf-${RANDOM}-$$-${RANDOM}.c"
TMPO="${TMPDIR1}/npw-conf-${RANDOM}-$$-${RANDOM}.o"
TMPE="${TMPDIR1}/npw-conf-${RANDOM}-$$-${RANDOM}"
TMPS="${TMPDIR1}/npw-conf-${RANDOM}-$$-${RANDOM}.S"

# default parameters
prefix="/usr"
lib32=""
lib64=""
x_base_dirs=""
biarch="guess"
build_viewer="guess"
linux_only="guess"
cc="gcc -std=c99"
cxx="g++"
host_os=`uname -s | tr '[A-Z]' '[a-z]'`
host_cpu=`uname -m`
target_os="linux"
target_cpu="i386"
case "$host_cpu" in
i386|i486|i586|i686|i86pc|BePC)
    host_cpu="i386"
    ;;
ia64)
    host_cpu="ia64"
    ;;
"Power Macintosh"|ppc)
    host_cpu="ppc"
    ;;
ppc64)
    host_cpu="ppc64"
    ;;
sparc)
    host_cpu="sparc"
    ;;
sparc64)
    host_cpu="sparc64"
    ;;
amd64|amd64)
    host_cpu="amd64"
    ;;
*)
    host_cpu="unknown"
    ;;
esac
bigendian="no"

# find source path
# XXX: we assume an absolute path is given when launching configure, 
# except in './configure' case.
source_path=${0%configure}
source_path=${source_path%/}
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path=`pwd`
    source_path_used="no"
fi

for opt do
case "$opt" in
--prefix=*)
    prefix=`echo $opt | cut -d '=' -f 2`
    ;;
--pkglibdir=*)
    pkglibdir=`echo $opt | cut -d '=' -f 2`
    ;;
--target-os=*)
    target_os=`echo $opt | cut -d '=' -f 2 | tr '[A-Z]' '[a-z]'`
    ;;
--target-cpu=*)
    target_cpu=`echo $opt | cut -d '=' -f 2 | sed -e 's/^i.86$/i386/'`
    ;;
--generic-build)
    linux_only="no"
    ;;
--with-biarch)
    biarch="yes"
    ;;
--without-biarch)
    biarch="no"
    ;;
--with-viewer)
    build_viewer="yes"
    ;;
--without-viewer)
    build_viewer="no"
    ;;
--with-lib32=*)
    lib32=`echo $opt | cut -d '=' -f 2`
    ;;
--with-lib64=*)
    lib64=`echo $opt | cut -d '=' -f 2`
    ;;
--with-x11-prefix=*)
    x_base_dirs=`echo $opt | cut -d '=' -f 2`
    ;;
--with-cc=*)
    cc=`echo $opt | cut -d '=' -f 2`
    ;;
--with-cxx=*)
    cxx=`echo $opt | cut -d '=' -f 2`
    ;;
esac
done

# check for linux only build
if test "$linux_only" = "guess"; then
    if test "$host_os" = "linux" -a "$target_os" = "linux"; then
	linux_only="yes"
    else
	linux_only="no"
    fi
fi

# check for biarch build
if test "$biarch" = "guess"; then
    case $host_cpu:$target_cpu in
    amd64:i386 | ppc64:ppc)
	biarch="yes"
	;;
    *)
	biarch="no"
	;;
    esac
fi

# check for viewer builds
if test "$build_viewer" = "guess"; then
    build_viewer="no"
    case $host_os in
    linux)
	if test "$host_cpu" = "$target_cpu" -o "$biarch" = "yes"; then
	    build_viewer="yes"
	fi
	;;
    esac
fi

# check for libdir name
if test -z "$lib64"; then
    case $host_os in
    linux)
	# test if the compiler is 64bit
        echo 'int i;' > $TMPC
	nspluginwrapper_64bit_output=no
	if $cc -o $TMPO -c $TMPC; then
	    case `/usr/bin/file $TMPO` in
	    *"ELF 64"*)
		nspluginwrapper_64bit_output=yes
		;;
	    esac
	fi
	rm -f $TMPC $TMPO
	;;
    esac
    case $host_cpu:$nspluginwrapper_64bit_output in
    ppc64:yes | s390x:yes | sparc64:yes | amd64:yes)
	lib64="lib64"
	;;
    *)
	lib64="lib"
	;;
    esac
fi
if test -z "$lib32"; then
    lib32="lib"
fi

# check for installation root
if test -z "$pkglibdir"; then
    pkglibdir="$prefix/lib/$PACKAGE"
fi

# check for __attribute__((visibility())) support
cat > $TMPC << EOF
int foo __attribute__((visibility("hidden"))) = 1;
int bar __attribute__((visibility("protected"))) = 1;
EOF
has_visibility_attribute=no
if $cc -Werror -S $TMPC -o $TMPS >/dev/null 2>&1; then
    if grep '\.hidden.*foo' $TMPS >/dev/null; then
	if grep '\.protected.*bar' $TMPS >/dev/null; then
	    has_visibility_attribute=yes
	fi
    fi
fi
rm -f $TMPC $TMPS

# check for .init_array/.fini_array support
cat > $TMPC << EOF
static int x = -1;
int main(void) { return x; }
int foo(void) { x = 0; }
int (*fp)(void) __attribute__((section(".init_array"))) = foo;
EOF
has_initfini_array=no
if $cc -Werror $TMPC -o $TMPE >/dev/null 2>&1; then
    if $TMPE; then
	has_initfini_array=yes
    fi
fi
rm -f $TMPC $TMPE

# check for egrep program
if echo a | (grep -E '(a|b)') >/dev/null 2>&1; then
    EGREP='grep -E'
else
    EGREP='egrep'
fi

# check for __stack_chk_fail() in target GNU C library
if test "$biarch" = "yes"; then
    glibc_header_dir="/usr/include"
    libc_provides_ssp=no
    if test -f $glibc_header_dir/features.h \
	&& $EGREP '^[ 	]*#[ 	]*define[ 	]+__GNU_LIBRARY__[ 	]+([1-9][0-9]|[6-9])' \
	$glibc_header_dir/features.h > /dev/null; then
	if $EGREP '^[ 	]*#[ 	]*define[ 	]+__GLIBC__[ 	]+([1-9][0-9]|[3-9])' \
	    $glibc_header_dir/features.h > /dev/null; then
	    libc_provides_ssp=yes
	elif $EGREP '^[ 	]*#[ 	]*define[ 	]+__GLIBC__[ 	]+2' \
	    $glibc_header_dir/features.h > /dev/null \
	    && $EGREP '^[ 	]*#[ 	]*define[ 	]+__GLIBC_MINOR__[ 	]+([1-9][0-9]|[4-9])' \
	    $glibc_header_dir/features.h > /dev/null; then
	    libc_provides_ssp=yes
	fi
    fi
fi

# check for compiler flag
check_cc_option() {
    echo "int i;" > $TMPC
    if $cc $* -c $TMPC -o $TMPO > /dev/null 2>&1; then
	rm -f $TMPC $TMPO
	return 0
    fi
    rm -f $TMPC
    return 1
}

# check for CFLAGS
if test -z "$CFLAGS"; then
    CFLAGS="-O2 -g"
    if check_cc_option -mtune=generic $CFLAGS; then
	CFLAGS="$CFLAGS -mtune=generic"
    fi
fi
if test "$biarch" = "yes" -a -z "$CFLAGS_32"; then
    CFLAGS_32="-m32 -O2 -g"
    if check_cc_option -mtune=generic $CFLAGS_32; then
	CFLAGS_32="$CFLAGS_32 -mtune=generic"
    fi
fi

# check for pkg-config
pkgconfig=`which pkg-config`
if test -z "$pkgconfig"; then
    echo "pkg-config not found"
    exit 1
fi

# check for Glib 2.0 compile CFLAGS
if $pkgconfig --exists glib-2.0; then
    GLIB_CFLAGS=`$pkgconfig --cflags glib-2.0`
    GLIB_LDFLAGS=`$pkgconfig --libs glib-2.0`
else
    echo "GLIB 2.0 environment not found"
    exit 1
fi
cat > $TMPC << EOF
#include <glib.h>
int main(void) {
    (void) g_main_pending();
    return 0;
}
EOF
if ! $cc $CFLAGS $GLIB_CFLAGS $GLIB_LDFLAGS $TMPC -o $TMPE > /dev/null 2>&1; then
    echo "GLIB 2.0 environment not usable"
    rm -f $TMPC
    exit 1
fi
rm -f $TMPC $TMPE

# check for GTK+ 2.0 compile CFLAGS
if test "$build_viewer" = "yes"; then
    if $pkgconfig --exists gtk+-2.0; then
	GTK_CFLAGS=`$pkgconfig --cflags gtk+-2.0`
	GTK_LDFLAGS=`$pkgconfig --libs gtk+-2.0`
    else
	echo "GTK+ 2.0 environment not found"
	exit 1
    fi
    cat > $TMPC << EOF
#include <gtk/gtk.h>
int main(void) {
    gtk_main_quit();
    return 0;
}
EOF
    if ! $cc $CFLAGS $GTK_CFLAGS $GTK_LDFLAGS $TMPC -o $TMPE > /dev/null 2>&1; then
	echo "GTK+ 2.0 environment not usable"
	rm -f $TMPC
	exit 1
    fi
    rm -f $TMPC $TMPE
fi

# check for X11 base dir
if test -z "$x_base_dirs"; then
    x_base_dirs="
	/usr
	/usr/X11R6
	/usr/local/X11R6
	$prefix
    "
fi
for dir in $x_base_dirs; do
    x_include_dir="$dir/include"
    if test -f $x_include_dir/X11/Intrinsic.h; then
	x_lib_dir="$dir/$lib64"
	if test -f $x_lib_dir/libX11.so; then
	    x_base_dir=$dir
	    break
	fi
    fi
done
if test -z "$x_base_dir"; then
    echo "X11 environment not found"
    exit 1
fi

# big/little endian test
cat > $TMPC << EOF
#include <inttypes.h>
int main(int argc, char ** argv){
    volatile uint32_t i=0x01234567;
    return (*((uint8_t*)(&i))) == 0x67;
}
EOF

if $cc -o $TMPE $TMPC 2>/dev/null ; then
    $TMPE && bigendian="yes"
else
    echo "big/little test failed"
fi

rm -f $TMPO $TMPC $TMPE $TMPS

# floating point endian test
cat > $TMPC << EOF
/* This will not work unless sizeof(double) == 8.  */
extern char sizeof_double_must_be_8 [sizeof(double) == 8 ? 1 : -1];

/* This structure must have no internal padding.  */
struct possibility {
  char prefix[8];
  double candidate;
  char postfix[8];
};

#define C(cand) { "\nformat:", cand, ":tamrof\n" }
struct possibility table [] =
{
  C( 3.25724264705901305206e+01), /* @@IEEEFP - IEEE 754 */
  C( 3.53802595280598432000e+18), /* D__float - VAX */
  C( 5.32201830133125317057e-19), /* D.PDP-10 - PDP-10 - the dot is 0x13a */
  C( 1.77977764695171661377e+10), /* IBMHEXFP - s/390 format, ascii */
  C(-5.22995989424860458374e+10)  /* IBMHEXFP - s/390 format, EBCDIC */
};
EOF

if $cc -o $TMPO -c $TMPC 2>/dev/null; then
    od -c $TMPO |
    sed 's/^[0-7]*[ 	]*/ /
	 s/\*/./g
	 s/ \\n/*/g
	 s/ [0-9][0-9][0-9]/./g
	 s/  \\[^ ]/./g' |
    tr -d '
 ' | tr -s '*' '
' | fold | sed '$a\
' > $TMPE

    if grep 'format:.@IEEEF.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='IEEE (big-endian)'
    elif grep 'format:.I@@PFE.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='IEEE (big-endian)'
    elif grep 'format:.FEEEI@.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='IEEE (little-endian)'
    elif grep 'format:.EFP@@I.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='IEEE (little-endian)'
    elif grep 'format:.__floa.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='VAX D-float'
    elif grep 'format:..PDP-1.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='PDP-10'
    elif grep 'format:.BMHEXF.:tamrof' $TMPE >/dev/null 2>&1; then
	float_format='IBM 370 hex'
    else
	echo "unknown floating point format"
	exit 1
    fi

    fbigendian=
    case $float_format in
    'IEEE (big-endian)')
	if test "$bigendian" = "no"; then
	    fbigendian=1
	fi
	;;
    'IEEE (little-endian)')
	if test "$bigendian" = "yes"; then
	    fbigendian=0
	fi
	;;
    *)
	echo "unsupported floating point format $float_format"
	exit 1
	;;
    esac
else
    echo "floating point endian test failed"
fi

rm -f $TMPO $TMPC $TMPE

# print configure help
if test x"$1" = x"-h" -o x"$1" = x"--help" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

EOF
echo "Standard options:"
echo "  --help                      print this message"
echo "  --prefix=PREFIX             install in PREFIX [$prefix]"
echo "  --pkglibdir=ROOT            install private files in ROOT [$pkglibdir]"
echo "  --target-os=OS              build plugin support for target OS [$target_os]"
echo "  --target-cpu=CPU            build plugin support for target CPU [$target_cpu]"
echo "  --with-viewer               build viewer [$build_viewer]"
echo ""
echo "Advanced options (experts only):"
echo "  --source-path=PATH          path of source code [$source_path]"
echo "  --generic-build             don't use system-specific additions"
echo "  --with-biarch               build both 32-bit and 64-bit components at once"
echo "  --with-lib32=NAME           use NAME as the 32-bit library dir name [$lib32]"
echo "  --with-lib64=NAME           use NAME as the 64-bit library dir name [$lib64]"
echo "  --with-x11-prefix=PREFIX    use PREFIX as the X11 base dir [autodetect]"
echo "  --with-cc=CC                use C compiler CC [$cc]"
echo "  --with-cxx=CXX              use C++ compiler CXX [$cxx]"
echo ""
echo "NOTE: The object files are built at the place where configure is launched"
exit 1
fi

echo "Install prefix            $prefix"
echo "nspluginwrapper root dir  $pkglibdir"
echo "Bi-arch build             $biarch"
echo "Build viewer              $build_viewer"
echo "Build for Linux only      $linux_only"
echo "32-bit library dir name   $lib32"
echo "64-bit library dir name   $lib64"
echo "Source path               $source_path"
echo "C compiler                $cc"
echo "C++ compiler              $cxx"
echo "host OS                   $host_os"
echo "host CPU                  $host_cpu"
echo "host big endian           $bigendian"
echo "target OS                 $target_os"
echo "target CPU                $target_cpu"

config_mak="config-host.mak"
echo "# Automatically generated by configure - do not modify" > $config_mak

config_h="config-host.h"
echo "/* Automatically generated by configure - do not modify */" > $config_h

echo "CC=$cc" >> $config_mak
echo "CXX=$cxx" >> $config_mak
echo "CFLAGS=$CFLAGS" >> $config_mak
echo "GLIB_CFLAGS=$GLIB_CFLAGS" >> $config_mak
echo "GLIB_LDFLAGS=$GLIB_LDFLAGS" >> $config_mak
echo "GTK_CFLAGS=$GTK_CFLAGS" >> $config_mak
echo "GTK_LDFLAGS=$GTK_LDFLAGS" >> $config_mak
if test "$biarch" = "yes"; then
echo "LDFLAGS_32=-m32" >> $config_mak
echo "CFLAGS_32=$CFLAGS_32" >> $config_mak
else
echo 'CFLAGS_32=$(CFLAGS)' >> $config_mak
fi
if test "$host_os" = "linux"; then
    echo "OS=linux" >> $config_mak
    echo "#define HOST_LINUX 1" >> $config_h
    echo "#define HOST_OS \"linux\"" >> $config_h
elif test "$host_os" = "dragonfly"; then
    echo "OS=dragonfly" >> $config_mak
    echo "#define HOST_DRAGONFLY 1" >> $config_h
    echo "#define HOST_OS \"dragonfly\"" >> $config_h
elif test "$host_os" = "freebsd"; then
    echo "OS=freebsd" >> $config_mak
    echo "#define HOST_FREEBSD 1" >> $config_h
    echo "#define HOST_OS \"freebsd\"" >> $config_h
elif test "$host_os" = "netbsd"; then
    echo "OS=netbsd" >> $config_mak
    echo "#define HOST_NETBSD 1" >> $config_h
    echo "#define HOST_OS \"netbsd\"" >> $config_h
else
    echo "Unsupported OS"
    exit 1
fi
if test "$host_cpu" = "i386" ; then
    echo "ARCH=i386" >> $config_mak
    echo "#define HOST_I386 1" >> $config_h
    echo "#define HOST_ARCH \"i386\"" >> $config_h
elif test "$host_cpu" = "amd64" ; then
    echo "ARCH=amd64" >> $config_mak
    echo "#define HOST_X86_64 1" >> $config_h
    echo "#define HOST_ARCH \"amd64\"" >> $config_h
elif test "$host_cpu" = "ppc" ; then
    echo "ARCH=ppc" >> $config_mak
    echo "#define HOST_PPC 1" >> $config_h
    echo "#define HOST_ARCH \"ppc\"" >> $config_h
elif test "$host_cpu" = "ppc64" ; then
    echo "ARCH=ppc64" >> $config_mak
    echo "#define HOST_PPC64 1" >> $config_h
    echo "#define HOST_ARCH \"ppc64\"" >> $config_h
elif test "$host_cpu" = "sparc" ; then
    echo "ARCH=sparc" >> $config_mak
    echo "#define HOST_SPARC 1" >> $config_h
    echo "#define HOST_ARCH \"sparc\"" >> $config_h
elif test "$host_cpu" = "sparc64" ; then
    echo "ARCH=sparc64" >> $config_mak
    echo "#define HOST_SPARC64 1" >> $config_h
    echo "#define HOST_ARCH \"sparc64\"" >> $config_h
elif test "$host_cpu" = "ia64" ; then
    echo "ARCH=ia64" >> $config_mak
    echo "#define HOST_IA64 1" >> $config_h
    echo "#define HOST_ARCH \"ia64\"" >> $config_h
else
    echo "Unsupported CPU"
    exit 1
fi
if test "$bigendian" = "yes" ; then
    echo "WORDS_BIGENDIAN=yes" >> $config_mak
    echo "#define WORDS_BIGENDIAN 1" >> $config_h
fi
if test -n "$fbigendian" ; then
    echo "#define FLOAT_WORDS_BIGENDIAN $fbigendian" >> $config_h
fi

echo "SRC_PATH=$source_path" >> $config_mak
echo "build_viewer=$build_viewer" >> $config_mak
echo "biarch=$biarch" >> $config_mak
echo "lib32=$lib32" >> $config_mak
echo "lib64=$lib64" >> $config_mak
echo "prefix=$prefix" >> $config_mak
echo "bindir=$prefix/bin" >> $config_mak
libdir="$prefix/$lib64"
echo "libdir=$libdir" >> $config_mak
echo "#define LIB \"$lib64\"" >> $config_h
echo "#define LIBDIR \"$libdir\"" >> $config_h
echo "x11prefix=$x_base_dir" >> $config_mak

VERSION=`sed < $source_path/$PACKAGE.spec -n '/^\%define version[	]*/s///p'`
RELEASE=`sed < $source_path/$PACKAGE.spec -n '/^\%define release[	]*/s///p'`
SVNDATE=`sed < $source_path/$PACKAGE.spec -n '/^\%define svndate[ 	]*/s///p'`
if test -z "$SVNDATE"; then
    SVNDATE=`date '+%Y%m%d'`
fi
SNAPSHOT=0
if echo "$RELEASE" | grep -q ^0; then
    SNAPSHOT=1
fi
echo "VERSION=$VERSION" >> $config_mak
echo "SVNDATE=$SVNDATE" >> $config_mak
echo "SNAPSHOT=$SNAPSHOT" >> $config_mak
echo "#define NPW_SNAPSHOT $SNAPSHOT" >> $config_h
if test "$SNAPSHOT" = "1"; then
    echo "#define NPW_VERSION \"$VERSION-Pre ($SVNDATE)\"" >> $config_h
else
    echo "#define NPW_VERSION \"$VERSION\"" >> $config_h
fi

echo "pkglibdir=$pkglibdir" >> $config_mak
echo "#define NPW_LIBDIR \"$pkglibdir\"" >> $config_h

if test "$has_visibility_attribute" = "yes"; then
    echo "#define attribute_hidden __attribute__((visibility(\"hidden\")))" >> $config_h
    echo "#define attribute_protected __attribute__((visibility(\"protected\")))" >> $config_h
else
    echo "#define attribute_hidden" >> $config_h
    echo "#define attribute_protected" >> $config_h
fi
if test "$has_initfini_array" = "yes"; then
    echo "#define HAVE_INITFINI_ARRAY 1" >> $config_h
else
    echo "#undef HAVE_INITFINI_ARRAY" >> $config_h
fi
if test "$libc_provides_ssp" = "yes"; then
    echo "#define TARGET_LIBC_PROVIDES_SSP 1" >> $config_h
else
    echo "#undef TARGET_LIBC_PROVIDES_SSP" >> $config_h
fi

config_mak="config.mak"
echo "# Automatically generated by configure - do not modify" > $config_mak
echo "include config-host.mak" >> $config_mak

config_h="config.h"
echo "/* Automatically generated by configure - do not modify */" > $config_h
echo "#include \"config-host.h\"" >> $config_h

if test "$linux_only" = "yes"; then
    echo "#define BUILD_LINUX_ONLY 1" >> $config_h
fi

if test "$target_os" = "linux"; then
    echo "TARGET_OS=linux" >> $config_mak
    echo "#define TARGET_OS \"linux\"" >> $config_h
    echo "#define TARGET_LINUX 1" >> $config_h
elif test "$target_os" = "solaris"; then
    echo "TARGET_OS=solaris" >> $config_mak
    echo "#define TARGET_OS \"solaris\"" >> $config_h
    echo "#define TARGET_SOLARIS 1" >> $config_h
else
    echo "Unsupported target OS"
    exit 1
fi

if test "$target_cpu" = "i386" ; then
    echo "TARGET_ARCH=i386" >> $config_mak
    echo "#define TARGET_ARCH \"i386\"" >> $config_h
    echo "#define TARGET_I386 1" >> $config_h
elif test "$target_cpu" = "amd64" ; then
    echo "TARGET_ARCH=amd64" >> $config_mak
    echo "#define TARGET_ARCH \"amd64\"" >> $config_h
    echo "#define TARGET_X86_64 1" >> $config_h
elif test "$target_cpu" = "ppc" ; then
    echo "TARGET_ARCH=ppc" >> $config_mak
    echo "#define TARGET_ARCH \"ppc\"" >> $config_h
    echo "#define TARGET_PPC 1" >> $config_h
else
    echo "Unsupported target CPU"
    exit 1
fi

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    case $source_path in
    ..*)
	sp1=..
	;;
    esac
    ln -sf $source_path/Makefile Makefile
fi