1

#!/bin/bash

     2

     3

#

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# Copyright (C) 2004 Edouard TISSERRANT, Laurent BESSARD

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# Based on Gabriel Gerhardsson's cacheprobe configure script. 

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# 

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# This file is part of CanFestival, a library implementing CanOpen Stack. 

     8

# 

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# This library is free software; you can redistribute it and/or

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# modify it under the terms of the GNU Lesser General Public

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# License as published by the Free Software Foundation; either

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# version 2.1 of the License, or (at your option) any later version.

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# 

    14

# This library is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

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# Lesser General Public License for more details.

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# 

    19

# You should have received a copy of the GNU Lesser General Public

    20

# License along with this library; if not, write to the Free Software

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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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# 

    23

    24

###########################################################################

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#                       DEFAULT CANFESTIVAL DEFINES                       #

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###########################################################################

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# Number of can bus to use 

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MAX_CAN_BUS_ID=1

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    31

# max bytes to transmit by SDO Put 4 if you only support expedited transfert.

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#For a normal transfert, (usually for a string), put the maximum string size to transfer.

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SDO_MAX_LENGTH_TRANSFERT=32

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    35

# Number of SDO from differents nodes that the node can manage concurrently.   

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#for a slave node, usually put 1.

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SDO_MAX_SIMULTANEOUS_TRANSFERTS=4

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    39

# Used for NMTable[bus][nodeId]	  

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# You can put less of 128 if on the netwo

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# are connected only smaller nodeId node.

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NMT_MAX_NODE_ID=128

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#Timeout in milliseconds for SDO.

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#    Comment the #define if not used (infinite wait for SDO response message)

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SDO_TIMEOUT_MS=3000

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MAX_NB_TIMER=32

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    50

# Generic timers declaration defaults

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US_TO_TIMEVAL_FACTOR=

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TIMEVAL=

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TIMEVAL_MAX=

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# Default to little-endian

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CANOPEN_BIG_ENDIAN=

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    58

# Max number of active errors managed in error_data structure.

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EMCY_MAX_ERRORS=8

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    61

#Timeout in milliseconds for LSS.

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LSS_TIMEOUT_MS=1000

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#Timeout in milliseconds for LSS FastScan.

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LSS_FS_TIMEOUT_MS=100

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    66

###########################################################################

    67

#                             DEFAULT BUILD OPTIONS                       #

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###########################################################################

    69

    70

# Leave empty for automatic detection

    71

CC=

    72

CXX=

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LD=

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    75

#default target

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SUB_TARGET=

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    78

# First compiler option - we will check if it exists

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CC1=gcc

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# Second compiler option - we will check if it exists

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CC2=cc

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    83

# Install prefix

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SUB_PREFIX=

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    86

# Used for C compiler test/detection 

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CFLAGS=

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test=conftest

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rm -f $test $test.c

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    91

if [ "$XENO_CONFIG" = "" ]; then

    92

	XENO_CONFIG=/usr/xenomai/bin/xeno-config

    93

fi

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    95

###########################################################################

    96

#                          ARGUMENTS PARSING                              #

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###########################################################################

    98

while [ $# -ge 1 ]; do

    99

	optarg=`expr "x$1" : 'x[^=]*=\(.*\)'`

   100

   101

	case $1 in

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	--cc=*)		CC=$optarg;;

   103

	--cxx=*)	CXX=$optarg;;

   104

	--ld=*)		LD=$optarg;;

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	--arch=*)	SUB_ARCH_NAME=$optarg;;

   106

	--os=*)		SUB_OS_NAME=$optarg;;

   107

	--kerneldir=*)	SUB_KERNELDIR=$optarg;;

   108

	--prefix=*)	SUB_PREFIX=$optarg;;

   109

	--target=*)	SUB_TARGET=$optarg;;

   110

	--can=*)	SUB_CAN_DRIVER=$optarg;;

   111

	--timers=*)	SUB_TIMERS_DRIVER=$optarg;;

   112

	--wx=*)		SUB_WX=$optarg;

   113

			echo "Forced wx detection to $optarg";;

   114

	--disable-Ox)	DISABLE_OPT=1;

   115

			echo "On user request: Won't optimize with \"-Ox\"";;

   116

	--disable-dll)	DISABLE_DLL=1;

   117

			echo "On user request: Won't create and link to dll";;

   118

	--enable-lss)	ENABLE_LSS=1;

   119

			echo "On user request: LSS services enabled";;

   120

	--enable-lss-fs)	ENABLE_LSS_FS=1;

   121

			echo "On user request: LSS FastScan service enabled";;

   122

	--debug=*)	DEBUG=$optarg;;

   123

	--MAX_CAN_BUS_ID=*)	MAX_CAN_BUS_ID=$optarg;;

   124

	--SDO_MAX_LENGTH_TRANSFERT=*)	SDO_MAX_LENGTH_TRANSFERT=$optarg;;

   125

	--SDO_MAX_SIMULTANEOUS_TRANSFERTS=*)	SDO_MAX_SIMULTANEOUS_TRANSFERTS=$optarg;;

   126

	--NMT_MAX_NODE_ID=*)	NMT_MAX_NODE_ID=$optarg;;

   127

	--SDO_TIMEOUT_MS=*)	SDO_TIMEOUT_MS=$optarg;;

   128

	--CANOPEN_BIG_ENDIAN=*)	CANOPEN_BIG_ENDIAN=$optarg;;

   129

	--MAX_NB_TIMER=*) MAX_NB_TIMER=$optarg;;

   130

	--EMCY_MAX_ERRORS=*) EMCY_MAX_ERRORS=$optarg;;

   131

	--LSS_TIMEOUT_MS=*)	LSS_TIMEOUT_MS=$optarg;;

   132

	--LSS_FS_TIMEOUT_MS=*)	LSS_FS_TIMEOUT_MS=$optarg;;

   133

	--help)

   134

		echo	"Usage: ./configure [options]"

   135

		echo	"Options:"

   136

		echo 	" --cc=foo      Use C compiler 'foo' instead of defaults ${CC1} or ${CC2}."

   137

		echo 	" --cxx=foo     Use C++ compiler 'foo' instead of defaults g++."

   138

		echo 	" --ld=foo      Use linker 'foo' instead of ld."

   139

		echo 	" --arch=foo    Use architecture 'foo' instead of trying to autodetect."

   140

		echo 	" --os=foo      Use operative system 'foo' instead of trying to autodetect."

   141

		echo 	" --kerneldir=foo   Use 'foo' as kernel source directory instead of default"

   142

		echo 	" --prefix=foo  Use prefix 'foo' instead of default ${SUB_PREFIX}."

   143

		echo 	" --target=foo  Use 'foo' as build target."

   144

		echo	"               \"unix\" for unix-like systems (Linux, Cygwin)"

   145

		echo	"               \"win32\" for win32 systems (native, mingw or VC++)"

   146

		echo	"               \"hcs12\" for HCS12 micro-controller"

   147

		echo 	" --can=foo	Use 'foo' as CAN driver"

   148

		echo	"               \"peak_linux\" use Linux build host installed Peak driver and library"

   149

		echo	"                 see http://www.peak-system.com/linux/"

   150

		echo	"               \"peak_win32\" use win32 PcanLight Peak driver and library with Cygwin" 

   151

		echo	"                 see http://www.peak-system.com/themen/download_gb.html"

   152

		echo	"               \"virtual\" use unix pipe based virtual can driver"

   153

		echo	"               \"virtual_kernel\" use kernel module virtual can driver"

   154

		echo	"               \"socket\" use socket-can  "

   155

		echo	"                 see http://developer.berlios.de/projects/socketcan/"

   156

		echo	"               \"lincan\" lincan driver"

   157

		echo	"                 see http://www.ocera.org/download/components/WP7/lincan-0.3.3.html"

   158

		echo	"               \"can4linux\" can4linux driver"

   159

		echo	"                 see http://www.port.de/engl/canprod/hw_can4linux.html"

   160

		echo 	" --timers=foo  Use 'foo' as TIMERS driver (can be 'unix', 'xeno' or 'kernel')"

   161

		echo 	" --wx=foo  force result of WxWidgets detection (0 or 1)"

   162

		echo 	" --disable-dll Disable run-time dynamic linking of can, led and nvram drivers"

   163

		echo 	" --enable-lss  Enable the LSS services"

   164

		echo 	" --enable-lss-fs  Enable the LSS FastScan service"

   165

		echo	" --disable-Ox  Disable gcc \"-Ox\" optimizations."

   166

		echo	" --debug=foo,foo,..   Enable debug messages, ERR -> only errors, WAR)."

   167

		echo	"               \"PDO\" send errors and warnings through PDO messages"

   168

		echo	"               \"ERR\" print errors only, to stdout"

   169

		echo	"               \"WAR\" print errors and warnings, to stdout"

   170

		echo	"               \"MSG\" print messages content, to stdout"

   171

		echo

   172

		echo	"Stack compilation constants"

   173

		echo	" --MAX_CAN_BUS_ID [=1] Number of can bus to use"

   174

		echo	" --SDO_MAX_LENGTH_TRANSFERT [=32] max bytes to transmit by SDO"

   175

		echo	" --SDO_MAX_SIMULTANEOUS_TRANSFERTS [=4] Number of SDO that the node can manage concurrently"

   176

		echo	" --NMT_MAX_NODE_ID [=128] can be reduced to gain memory on small network"

   177

		echo	" --SDO_TIMEOUT_MS [=3000] Timeout in milliseconds for SDO (None to disable the feature)"

   178

		echo	" --EMCY_MAX_ERRORS [=8] Max number of active errors managed in error_data structure"

   179

		echo	" --LSS_TIMEOUT_MS [=1000] Timeout in milliseconds for LSS services."

   180

		echo	"                          LSS must be enabled with \"--enable-lss\""

   181

		echo	" --LSS_FS_TIMEOUT_MS [=100] Timeout in milliseconds for LSS FastScan service."

   182

		echo	"                            LSS FastScan must be enabled with \"--enable-lss-fs\""

   183

		exit 0;;

   184

	*)		echo "Unknown argument ${1}"; exit -1;;

   185

	esac

   186

   187

	shift

   188

done

   189

   190

###########################################################################

   191

#                              GUESS OS/ARCH                              #

   192

###########################################################################

   193

   194

if [ "$SUB_OS_NAME" = "" ]; then

   195

	SUB_OS_NAME="`(uname -s | sed \"s/\//-/\" | sed \"s/_/-/\" \

   196

			| sed \"s/-.*//g\") 2>&1`"

   197

fi

   198

   199

if [ "$SUB_ARCH_NAME" = "" ]; then

   200

	if [ "$CC" = "" ]; then

   201

		A_NAME="`(uname -m) 2>&1`"

   202

	else

   203

		A_NAME="`$CC -dumpmachine | sed 's:-.*::'`"

   204

	fi

   205

fi

   206

   207

# x86

   208

if [ "$A_NAME" = "i386" -o "$A_NAME" = "i486" -o "$A_NAME" = "i586" -o "$A_NAME" = "i686" -o "$A_NAME" = "x86" ]; then

   209

	SUB_ARCH_NAME=x86

   210

fi

   211

   212

# x86_64

   213

if [ "$A_NAME" = "x86_64" ]; then

   214

	SUB_ARCH_NAME=x86_64

   215

fi

   216

   217

# ppc

   218

if [ "$A_NAME" = "powerpc" ]; then

   219

	SUB_ARCH_NAME=ppc

   220

fi

   221

   222

# ppc64

   223

if [ "$A_NAME" = "powerpc64" ]; then

   224

	SUB_ARCH_NAME=ppc64

   225

fi

   226

   227

# arm

   228

if [ "$A_NAME" = "arm" ]; then

   229

	SUB_ARCH_NAME=arm

   230

fi

   231

   232

# mingw32

   233

if [ "$A_NAME" = "mingw32" ]; then

   234

	SUB_ARCH_NAME=mingw32

   235

fi

   236

   237

if [ "$SUB_ARCH_NAME" = "" ]; then

   238

	echo "Error: could not detect what architecture this system is running!"

   239

	echo "Please supply manually instead with \"--arch=foo\""

   240

	exit -1

   241

fi

   242

   243

echo "Host OS: ${SUB_OS_NAME}"

   244

echo "Host arch: ${SUB_ARCH_NAME}"

   245

   246

if [ "$SUB_ARCH_NAME" = "x86_64" -a "$CC" = "gcc" ]; then

   247

	# Only if we are on x86_64 and using gcc

   248

	# For shared library generation, it needs this

   249

	SUB_PROG_CFLAGS=-fPIC

   250

fi

   251

   252

if [ "$SUB_ARCH_NAME" = "ppc" -o "$SUB_ARCH_NAME" = "powerpc" ]; then

   253

	# PowerPC uses big endian format

   254

	CANOPEN_BIG_ENDIAN=1

   255

fi

   256

   257

###########################################################################

   258

#                      DEFAULT TARGET/DRIVERS GUESSING                    #

   259

###########################################################################

   260

# If target not specified, try to guess one

   261

if [ "$SUB_TARGET" = "" ]; then

   262

	if [ "$SUB_OS_NAME" = "CYGWIN" ]; then

   263

		echo "Choosing unix (cygwin) target"

   264

		SUB_TARGET=unix

   265

	fi

   266

	if [ "$SUB_OS_NAME" = "Linux" ]; then

   267

		echo "Choosing unix target"

   268

		SUB_TARGET=unix

   269

	fi

   270

	if [ "$SUB_OS_NAME" = "MINGW32" ]; then

   271

		echo "Choosing windows target"

   272

		SUB_TARGET=win32

   273

	fi

   274

fi

   275

   276

# Try to guess can

   277

if [ "$SUB_CAN_DRIVER" = "" ]; then

   278

	if [ "$SUB_TARGET" = "unix" ]; then

   279

		if [ -e /usr/lib/libpcan.so ]; then 

   280

			echo "Choosing installed Peak driver as CAN driver."

   281

			SUB_CAN_DRIVER=peak_linux

   282

		elif [ "$SUB_OS_NAME" = "CYGWIN" -a "PCAN_LIB" != "" ]; then

   283

			echo "Choosing installed Peak driver as CAN driver."

   284

			SUB_CAN_DRIVER=peak_win32		

   285

		elif [ -e /usr/lib/libcanlib.so ]; then 

   286

			echo "Choosing installed Kvaser driver as CAN driver. (unix)"

   287

			SUB_CAN_DRIVER=kvaser

   288

		elif [ "$SUB_OS_NAME" = "CYGWIN" -a "$KVASER_DLL_PATH" != "" ]; then

   289

			echo "Choosing installed Kvaser driver as CAN driver. (cygwin)"

   290

			SUB_CAN_DRIVER=kvaser

   291

		else

   292

			echo "Choosing virtual CAN driver."

   293

			SUB_CAN_DRIVER=virtual

   294

		fi

   295

	fi

   296

fi

   297

   298

# If target is unix, default timers also

   299

if [ "$SUB_TARGET" = "unix" -a "$SUB_TIMERS_DRIVER" = "" ]; then

   300

	echo "Choosing unix timers driver."

   301

	SUB_TIMERS_DRIVER=unix

   302

fi

   303

   304

# If target is windows, default timers also

   305

if [ "$SUB_TARGET" = "win32" -a "$SUB_TIMERS_DRIVER" = "" ]; then

   306

	echo "Choosing windows timers driver."

   307

	SUB_TIMERS_DRIVER=win32

   308

fi

   309

   310

# Warn for unstalled peak driver if choosen

   311

if [ "$SUB_CAN_DRIVER" = "peak" ]; then

   312

	if [ ! -e /usr/lib/libpcan.so ]; then 

   313

		echo "Peak driver hasn't been installed !"

   314

		exit -1

   315

	fi

   316

fi

   317

   318

# Warn for unstalled kvaser driver if choosen

   319

if [ "$SUB_CAN_DRIVER" = "kvaser" ]; then

   320

	if [ "$SUB_OS_NAME" = "CYGWIN" ]; then

   321

        if [ ! -e "$KVASER_DLL_PATH/canlib32.dll" ]; then 

   322

            echo "Kvaser driver hasn't been installed (cygwin)"

   323

            exit -1

   324

        fi

   325

    elif  [ "$SUB_OS_NAME" = "LINUX" ]; then

   326

        if [ ! -e /usr/lib/libcanlib.so ]; then 

   327

            echo "Kvaser driver hasn't been installed (unix)"

   328

            exit -1

   329

        fi

   330

	fi

   331

fi

   332

   333

###########################################################################

   334

#              TARGET/DRIVER SPECIFIC CFLAGS and OPTIONS                  #

   335

###########################################################################

   336

if [ "$SUB_TARGET" = "hcs12" ]; then

   337

	# Only if we want to compile for a C HCS12

   338

       # it is a big endian architecture.

   339

       CANOPEN_BIG_ENDIAN=1

   340

	# search for gcc hcs12 compiler m6811-elf-gcc or m68hc12-gcc ?

   341

	if [ "$CC" = "" ]; then

   342

		which m6811-elf-gcc >/dev/null 2>&1

   343

		if (( $? )); then 

   344

			which m68hc12-gcc >/dev/null 2>&1

   345

			if (( $? )); then 

   346

				echo "Please use --cc flag to specify compiler"

   347

				exit 0

   348

			else

   349

				CC=m68hc12-gcc 

   350

			fi

   351

		else

   352

			CC=m6811-elf-gcc

   353

			SUB_PROG_CFLAGS=-m68hc12

   354

		fi

   355

	fi

   356

fi	

   357

   358

#### CAN_DRIVER ####

   359

   360

if [ "$SUB_CAN_DRIVER" = "kvaser" ]; then

   361

	if [ "$SUB_TARGET" = "unix" ]; then

   362

        if  [ "$SUB_OS_NAME" = "LINUX" ]; then

   363

            SUB_CAN_DLL_CFLAGS=$SUB_CAN_DLL_CFLAGS\ -lcanlib

   364

		elif [ "$SUB_OS_NAME" = "CYGWIN" ]; then

   365

	        if [ "$KVASER_INCLUDE_PATH" = "" -o "$KVASER_DLL_PATH" = "" ]; then

   366

		        echo "!!! ERROR !!! Please set KVASER_DLL_PATH and KVASER_INCLUDE_PATH to appropriate paths ! "

   367

            else

   368

                SUB_CAN_DLL_CFLAGS=$SUB_CAN_DLL_CFLAGS\ -L$KVASER_DLL_PATH\ -lcanlib32

   369

                SUB_PROG_CFLAGS=$SUB_PROG_CFLAGS\ -I$KVASER_INCLUDE_PATH

   370

            fi

   371

        fi

   372

    fi        

   373

fi

   374

   375

if [ "$SUB_CAN_DRIVER" = "peak_linux" ]; then

   376

    SUB_CAN_DLL_CFLAGS=$SUB_CAN_DLL_CFLAGS\ -lpcan

   377

fi

   378

   379

PW32DIR=drivers/can_peak_win32

   380

if [ "$SUB_CAN_DRIVER" = "peak_win32" ]; then

   381

	if [ "$PCAN_HEADER" = "" -o "$PCAN_LIB" = "" ]; then

   382

		echo "!!! ERROR !!! Please set PCAN_LIB PCAN_HEADER [PCAN_INCLUDE] to appropriate paths ! "

   383

	fi

   384

   	SUB_CAN_DLL_CFLAGS=$SUB_CAN_DLL_CFLAGS\ -liberty\ \'$PCAN_LIB\'

   385

	echo "Converting PcanLib header files for gcc -> $PW32DIR/cancfg.h"

   386

	cat $PW32DIR/cancfg.h.head $PCAN_INCLUDE/$PCAN_HEADER > $PW32DIR/cancfg.h

   387

	echo >> $PW32DIR/cancfg.h

   388

	# second port handling

   389

	if [ "$PCAN2_HEADER" != "" ]; then

   390

		echo "Stripping down second Pcan Light header "

   391

		echo >> $PW32DIR/cancfg.h

   392

		echo "// Stripped PcanLight header to prevent typedef conflicts ">> $PW32DIR/cancfg.h

   393

		echo >> $PW32DIR/cancfg.h

   394

		grep __stdcall $PCAN_INCLUDE/$PCAN2_HEADER >> $PW32DIR/cancfg.h

   395

		echo '#define PCAN2_HEADER_' >> $PW32DIR/cancfg.h

   396

	   	SUB_CAN_DLL_CFLAGS=$SUB_CAN_DLL_CFLAGS\ \'$PCAN2_LIB\'

   397

	fi

   398

	if grep -q CANHwType $PW32DIR/cancfg.h ; then

   399

		echo "Peak Init HwType, IO_Port and IRQ will be passed in environment :"

   400

		echo "	PCANHwType PCANIO_Port PCANInterupt"

   401

		echo '#define extra_PCAN_init_params' >> $PW32DIR/cancfg.h

   402

	fi

   403

	if ! grep -q CAN_Init $PW32DIR/cancfg.h ; then

   404

		echo "Pcan Light header/lib is for second port of device only"

   405

		echo "CAN_* calls redefined to CAN2_* "

   406

		echo '#define CAN_Init CAN2_Init' >> $PW32DIR/cancfg.h

   407

		echo '#define CAN_Read CAN2_Read' >> $PW32DIR/cancfg.h

   408

		echo '#define CAN_Write CAN2_Write' >> $PW32DIR/cancfg.h

   409

		echo '#define CAN_Close CAN2_Close' >> $PW32DIR/cancfg.h

   410

	fi

   411

	cat $PW32DIR/cancfg.h.tail >> $PW32DIR/cancfg.h

   412

fi

   413

   414

if [ "$SUB_CAN_DRIVER" = "none" ]; then

   415

	SUB_CAN_DRIVER=

   416

fi

   417

   418

#### TIMERS_DRIVER ####

   419

   420

if [ "$SUB_TIMERS_DRIVER" = "unix" ]; then

   421

	if [ "$SUB_OS_NAME" != "CYGWIN" ]; then

   422

	   SUB_EXE_CFLAGS=$SUB_EXE_CFLAGS\ -lpthread\ -lrt

   423

	fi

   424

fi

   425

   426

if [ "$SUB_TIMERS_DRIVER" = "xeno" ]; then

   427

	SUB_EXE_CFLAGS=$SUB_EXE_CFLAGS\ -lnative\ -lrtdm\ -L`$XENO_CONFIG --library-dir`

   428

	SUB_PROG_CFLAGS=$SUB_PROG_CFLAGS\ `$XENO_CONFIG --xeno-cflags`

   429

	RTCAN_SOCKET=1

   430

fi

   431

   432

if [ "$SUB_TIMERS_DRIVER" = "kernel" ]; then

   433

	DISABLE_DLL=1

   434

	if [ "$SUB_KERNELDIR" = "" ]; then

   435

		# use directory of current kernel

   436

		SUB_KERNELDIR=/lib/modules/$(uname -r)/build

   437

	fi

   438

fi

   439

   440

if [ "$SUB_TIMERS_DRIVER" = "none" ]; then

   441

	SUB_TIMERS_DRIVER=

   442

fi

   443

   444

###########################################################################

   445

#                              GUESS TOOLCHAIN                            #

   446

###########################################################################

   447

# If CC is empty, the user wanted automatic detection

   448

if [ "$CC" = "" ]; then

   449

	# Check for second compiler, CC2

   450

	cat > $test.c <<EOF

   451

	int main() { return 0; }

   452

EOF

   453

	if test "`($CC2 -c $CFLAGS $test.c) 2>&1`" = ""; then

   454

		DETECTCC=$CC2

   455

		echo "Checking for ${CC2}... Yes."

   456

	else

   457

		echo "Checking for ${CC2}... No."

   458

	fi

   459

	rm -f $test.c $test.o

   460

   461

	# Check for first compiler, CC1

   462

	cat > $test.c <<EOF

   463

	int main() { return 0; }

   464

EOF

   465

	if test "`($CC1 -c $CFLAGS $test.c) 2>&1`" = ""; then

   466

		DETECTCC=$CC1

   467

		echo "Checking for ${CC1}... Yes."

   468

	else

   469

		echo "Checking for ${CC1}... No."

   470

	fi

   471

	rm -f $test.c $test.o

   472

	CC=$DETECTCC

   473

fi

   474

# Check if we decided on a compiler after all

   475

if [ "$CC" = "" ]; then

   476

	echo "Error: Could not find a C compiler"

   477

	echo "Please supply the wanted compiler"

   478

	exit -1

   479

fi

   480

   481

echo "Using ${CC} as a C compiler"

   482

   483

SUB_BINUTILS_PREFIX=`echo "$CC" | sed 's/gcc$//'`

   484

   485

if [ "$CXX" = "" ]; then

   486

	CXX=${SUB_BINUTILS_PREFIX}g++

   487

fi

   488

   489

echo "Using ${CXX} as a C++ compiler"

   490

   491

if [ "$SUB_TARGET" = "win32" ]; then

   492

	# on cygwin/mingw, choose  g++ as a linker for native target

   493

	if [ "$LD" = "" ]; then

   494

		LD=$CXX

   495

	fi

   496

	if [ "$SUB_OS_NAME" = "CYGWIN" ]; then

   497

		SUB_PROG_CFLAGS="-mno-cygwin"

   498

	fi

   499

fi	

   500

   501

if [ "$SUB_TARGET" = "unix" ]; then

   502

	if [ "$LD" = "" ]; then

   503

		LD=$CC