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#!/bin/sh

# Make a shared library.
# Basically do a switch/case depending on the OS and make a shared
# lib conforming to that OS.


# Usage:
#   mklib [options] objects ...
# Options:
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#   -o LIBRARY    specifies the name of resulting library
#                 ("-o GL" for example, might result in "libGL.so" being made)
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#   -major N      specifies major version number (default is 1)
#   -minor N      specifies minor version number (default is 0)
#   -patch N      specifies patch version number (default is 0)
#   -lLIBRARY     specifies a dependency on LIBRARY
#   -LDIR         search in DIR for library dependencies
#   -cplusplus    link with C++ runtime
#   -static       make a static library (default is dynamic/shared)
#   -install DIR  move resulting library files to DIR
#   -arch ARCH    override using `uname` to determine architecture
#   -archopt OPT  specify an extra achitecture-specific option OPT
#
# The library name should just be "GL" or "GLU", etc.  The 'lib' prefix
# will be added here if needed, as well as the ".so" or ".a" suffix, etc.
#
# objects should be:  foo.o bar.o etc.o
#
# Environment variables recognized:
#   CC   C compiler command
#   CXX  C++ compiler command
#


#
# Option defaults
#
LIBNAME=""
MAJOR=1
MINOR=0
PATCH=0
DEPS=""
CPLUSPLUS=0
STATIC=0
INSTALLDIR="."
ARCH="auto"
ARCHOPT=""


#
# Parse arguments
#
while true
do
    case $1 in
	'-o')         shift 1; LIBNAME=$1;;
	'-major')     shift 1; MAJOR=$1;;
	'-minor')     shift 1; MINOR=$1;;
	'-patch')     shift 1; PATCH=$1;;
	-l*)          DEPS="$DEPS $1";;
	-L*)          DEPS="$DEPS $1";;
	'-cplusplus') CPLUSPLUS=1;;
	'-static')    STATIC=1;;
	'-install')   shift 1; INSTALLDIR=$1;;
	'-arch')      shift 1; ARCH=$1;;
	'-archopt')   shift 1; ARCHOPT=$1;;
	-*)           echo "mklib: Unknown option: " $1 ; exit 1;;
	*) break
    esac
    shift 1
done
OBJECTS=$@

if [ ${ARCH} = "auto" ] ; then
    ARCH=`uname`
fi


#
# Error checking
#
if [ "x${LIBNAME}" = "x" ] ; then
    echo "mklib: Error: no library name specified"
    exit 1
fi
if [ "x${OBJECTS}" = "x" ] ; then
    echo "mklib: Error: no object files specified"
    exit 1
fi


#
# Debugging info
#
if [  ]  ; then
    echo "-----------------"
    echo ARCH is $ARCH
    echo LIBNAME is $LIBNAME
    echo MAJOR is $MAJOR
    echo MINOR is $MINOR
    echo PATCH is $PATCH
    echo DEPS are $DEPS
    echo "-----------------"
fi


#
# OK, make the library now
#
case $ARCH in

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    'Linux' | 'OpenBSD')
	# GCC-based environment
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	LIBNAME="lib${LIBNAME}"     # prefix with "lib"

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        if [ $STATIC = 1 ] ; then
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            echo "mklib: Making" $ARCH "static library: " ${LIBNAME}.a
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            LINK="ar"
            OPTS="-ruv"
            # make lib
            ${LINK} ${OPTS} ${LIBNAME}.a ${OBJECTS}
            # finish up
            FINAL_LIBS="${LIBNAME}.a"
        else
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	    if [ $ARCH = 'Linux' ] ; then
		OPTS="-Xlinker -Bsymbolic -shared -Wl,-soname,${LIBNAME}.so.${MAJOR}"
	    else
		OPTS="-shared -Wl,-soname,${LIBNAME}.so.${MAJOR}"
	    fi
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            VERSION="${MAJOR}.${MINOR}.${PATCH}"

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            echo "mklib: Making " $ARCH " shared library: " ${LIBNAME}.so.${VERSION}
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            if [ $CPLUSPLUS = 1 ] ; then
                LINK="g++"
            else
                LINK="gcc"
            fi

            # rm any old libs
            rm -f ${LIBNAME}.so.${VERSION}
            rm -f ${LIBNAME}.so.${MAJOR}
            rm -f ${LIBNAME}.so

            # make lib
            ${LINK} ${OPTS} -o ${LIBNAME}.so.${VERSION} ${OBJECTS} ${DEPS}
            # make usual symlinks
            ln -s ${LIBNAME}.so.${VERSION} ${LIBNAME}.so.${MAJOR}
            ln -s ${LIBNAME}.so.${MAJOR} ${LIBNAME}.so
            # finish up
            FINAL_LIBS="${LIBNAME}.so.${VERSION} ${LIBNAME}.so.${MAJOR} ${LIBNAME}.so"
        fi
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	;;

    'SunOS')
	LIBNAME="lib${LIBNAME}.so"
	echo "mklib: Making SunOS shared library: " ${LIBNAME}
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	# XXX OPTS for gcc should be -shared, but that doesn't work.
	# Using -G does work though.
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	if [ $CPLUSPLUS = 1 ] ; then
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	    # determine linker and options for C++ code
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	    if [ "x${CXX}" = "xg++" ] ; then
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		# use g++
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		LINK="g++"
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		OPTS="-G"
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	    elif [ "x${CXX}" = "xCC" ] ; then
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		# use Sun CC
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		LINK="CC"
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		OPTS="-G"
	    elif [ "x${CXX}" = "xc++" ] ; then
		# use Sun c++
		LINK="c++"
		OPTS="-G"
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	    elif [ `which c++` ] ; then
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		# use Sun c++
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		LINK="c++"
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		OPTS="-G"
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	    elif [ `type g++` ] ; then
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		# use g++
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		LINK="g++"
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		OPTS="-G"
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	    else
		echo "mklib: warning: can't find C++ comiler, trying CC."
		LINK="CC"
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		OPTS="-G"
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	    fi
	elif [ "x${CC}" = "xgcc" ] ; then
	    # use gcc for linking
	    LINK="gcc"
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	    OPTS="-G"
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	else
	    # use native Sun linker
	    LINK="ld"
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	    OPTS="-G"
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	fi
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	echo "mklib: linker is" ${LINK} ${OPTS}
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	rm -f ${LIBNAME}.${MAJOR} ${LIBNAME}
	${LINK} ${OPTS} -o ${LIBNAME}.${MAJOR} ${OBJECTS} ${DEPS}
	ln -s ${LIBNAME}.${MAJOR} ${LIBNAME}
	FINAL_LIBS="${LIBNAME}.${MAJOR} ${LIBNAME}"
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	;;

    'FreeBSD')
	SHLIB="lib${LIBNAME}.so.${MAJOR}.${MINOR}"
	STLIB="lib${LIBNAME}.a"
	echo "mklib: Making FreeBSD shared library: " ${SHLIB}
	rm -f ${SHLIB} ${STLIB}
	ar cq ${STLIB} ${OBJECTS}
	ranlib ${STLIB}
	ld -Bshareable -o ${SHLIB} ${OBJECTS}
	# XXX make lib${LIBNAME}.so.${MAJOR} symlink?
	FINAL_LIBS="${SHLIB} ${STLIB}"
	;;

    'NetBSD')
	LIBNAME="lib${LIBNAME}"
	echo "mklib: Making NetBSD PIC shared library: " ${LIBNAME}
	VERSION="${MAJOR}.${MINOR}"
	rm -f ${LIBNAME}_pic.a ${LIBNAME}.so.${VERSION}
	ar cq ${LIBNAME}_pic.a ${OBJECTS}
	ranlib ${LIBNAME}_pic.a
	ld -x -Bshareable -Bforcearchive -o ${LIBNAME}.so.${VERSION} ${LIBNAME}_pic.a
	FINAL_LIBS="${LIBNAME}_pic.a ${LIBNAME}.so.${VERSION}"
	;;

    'IRIX')
	LIBNAME="lib${LIBNAME}.so"  # prefix with "lib", suffix with ".so"
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	if [ $ARCHOPT = "64" ] ; then
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	    # 64-bit ABI
	    OPTS="-64 -shared -all"
	    echo "mklib: Making IRIX 64-bit shared library: " ${LIBNAME}
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	elif [ $ARCHOPT = "o32" ] ; then
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	    # old 32-bit ABI
	    OPTS="-32 -shared -all"
	    echo "mklib: Making IRIX o32-bit shared library: " ${LIBNAME}
	else
	    # new 32-bit ABI
	    OPTS="-n32 -shared -all"
	    echo "mklib: Making IRIX n32-bit shared library: " ${LIBNAME}
	fi
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	if [ $CPLUSPLUS = 1 ] ; then
	    LINK="CC"
	else
	    LINK="ld"
	fi
	${LINK} ${OPTS} -o ${LIBNAME} ${OBJECTS} ${DEPS}
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	FINAL_LIBS="${LIBNAME}"
	;;

    'IRIX64')
	LIBNAME="lib${LIBNAME}.so"  # prefix with "lib", suffix with ".so"
	echo "mklib: Making IRIX64 library: " ${LIBNAME}
	# 64-bit ABI
	OPTS="-64 -shared -all"
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	if [ $CPLUSPLUS = 1 ] ; then
	    LINK="CC"
	else
	    LINK="ld"
	fi
	${LINK} ${OPTS} -o ${LIBNAME} ${OBJECTS} ${DEPS}
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	FINAL_LIBS="${LIBNAME}"
	;;

    'linux-cygwin')
	LIBNAME="lib${LIBNAME}.a"
	echo "mklib: Making linux-cygwin library: " ${LIBNAME}
	gnuwin32ar ruv ${LIBNAME} ${OBJECTS}
	FINAL_LIBS=${LIBNAME}
	;;

    'HPUX')
	RUNLIB="lib${LIBNAME}.${MAJOR}"
	DEVLIB="lib${LIBNAME}.sl"
	echo "mklib: Making HPUX library: " ${RUNLIB} ${DEVLIB}
	ld -b -o ${RUNLIB} +b ${RUNLIB} ${OBJECTS} ${DEPS}
	ln -s ${RUNLIB} ${DEVLIB}
	FINAL_LIBS="{RUNLIB} ${DEVLIB}"
	;;

    'OpenSTEP')
	LIBNAME="lib${LIBNAME}.a"
	echo "mklib: Making OpenSTEP static library: " ${LIBNAME}
	libtool -static -o ${LIBNAME} - ${OBJECTS}
	FINAL_LIBS=${LIBNAME}
	;;

    'OSF1')
	VERSION="${MAJOR}.${MINOR}"
	LIBNAME="lib${LIBNAME}.so"
	ARNAME="lib${LIBNAME}.a"
	echo "mklib: Making OSF/1 library: " ${LIBNAME}
	rm -f ${LIBNAME}.${VERSION}
	ld -o ${LIBNAME}.${VERSION} -shared -no_archive -set_version ${VERSION} -soname ${LIBNAME}.${VERSION} -expect_unresolved \* -all ${OBJECTS} ${DEPS}
	ln -sf ${LIBNAME}.${VERSION} ${LIBNAME}

	# also make static lib
	rm -f ${ARNAME}
	ar clqz ${ARNAME} ${OBJECTS}
	FINAL_LIBS="${ARNAME} ${LIBNAME} ${LIBNAME}.${VERSION}"
	;;

    'Darwin')
	VERSION="${MAJOR}.${MINOR}.${TINY}"
	LIBNAME="lib${LIBNAME}.dylib"
	ARNAME="lib${LIBNAME}.dylib.a"
	echo "mklib: Making Darwin libraries: " ${LIBNAME} ${ARNAME}
	FLAGS="-dynamiclib -multiply_defined suppress"
	cc ${FLAGS} -o ${LIBNAME} ${OBJECTS} ${DEPS}
	# also make regular .a files,
	# provided by Danek Duvall (duvall@dhduvall.student.princeton.edu)
	ar ruv ${ARNAME} ${OBJECTS}
	ranlib ${ARNAME}
	FINAL_LIBS="${ARNAME} ${LIBNAME}"
	;;

    'LynxOS')
	LIBNAME="lib${LIBNAME}.a"
	echo "mklib: Making LynxOS library: " ${LIBNAME}
	ar ru ${LIBNAME} ${OBJECTS}
	FINAL_LIBS=${LIBNAME}
	;;

    'BeOS')
	LIBNAME="lib${LIBNAME}.so"
	echo "mklib: Making BeOS shared library: " ${LIBNAME}
	gcc -nostart -Xlinker -soname=${LIBNAME} -L/Be/develop/lib/x86 ${OBJECTS} -lbe -o ${LIBNAME}
	FINAL_LIBS=${LIBNAME}
	;;

    'QNX')
	LIBNAME="lib${LIBNAME}.a"
	echo "mklib: Making QNX library: " ${LIBNAME}
	wlib ${LIBNAME} ${OBJECTS}
	FINAL_LIBS=${LIBNAME}
	;;

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    'MorphOS')
	LIBNAME="lib${LIBNAME}.a"
	echo "mklib: Making MorphOS library: " ${LIBNAME}
	ppc-morphos-ar rc ${LIBNAME} ${OBJECTS}
	FINAL_LIBS="${LIBNAME}"
	;;

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    'icc')
	# Intel C compiler
	LIBNAME="lib${LIBNAME}"     # prefix with "lib"

        if [ $STATIC = 1 ] ; then
            echo "mklib: Making Intel ICC static library: " ${LIBNAME}.a
            LINK="ar"
            OPTS="-ruv"
            # make lib
            ${LINK} ${OPTS} ${LIBNAME}.a ${OBJECTS}
            # finish up
            FINAL_LIBS="${LIBNAME}.a"
        else
            OPTS="-shared"
            VERSION="${MAJOR}.${MINOR}.${PATCH}"

            echo "mklib: Making Intel ICC shared library: " ${LIBNAME}.so.${VERSION}

            if [ $CPLUSPLUS = 1 ] ; then
                LINK="icc"
            else
                LINK="icc"
            fi

            # rm any old libs
            rm -f ${LIBNAME}.so.${VERSION}
            rm -f ${LIBNAME}.so.${MAJOR}
            rm -f ${LIBNAME}.so

            # make lib
            ${LINK} ${OPTS} -o ${LIBNAME}.so.${VERSION} ${OBJECTS} ${DEPS}
            # make usual symlinks
            ln -s ${LIBNAME}.so.${VERSION} ${LIBNAME}.so.${MAJOR}
            ln -s ${LIBNAME}.so.${MAJOR} ${LIBNAME}.so
            # finish up
            FINAL_LIBS="${LIBNAME}.so.${VERSION} ${LIBNAME}.so.${MAJOR} ${LIBNAME}.so"
        fi
	;;

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    'aix-gcc')
	# AIX with gcc
	LIBNAME="lib${LIBNAME}.so"  # prefix with "lib", suffix with ".so"
	echo "mklib: Making AIX GCC shared library: " ${LIBNAME}
	# remove old lib
	rm -f ${LIBNAME}
	# make the lib
	gcc -shared -Wl,-G ${OBJECTS} ${DEPS} -o ${LIBNAME}

	# NOTE: the application linking with this library must specify
	# the -Wl,-brtl flags to gcc

	FINAL_LIBS=${LIBNAME}
	;;
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    'example')
	# If you're adding support for a new architecture, you can
	# start with this:
	LIBNAME="lib${LIBNAME}.so"  # prefix with "lib"
	echo "mklib: Making library for example arch: " ${LIBNAME}
	ld -o ${LIBNAME} ${OBJECTS} ${DEPS}
	FINAL_LIBS="${LIBNAME}"
	;;

    *)
	echo "mklib: WARNING: making library for unknown platform!"
	echo "mklib: WARNING: this may not work!"
	echo "mklib: WARNING: please update the bin/mklib script!"
	# XXX this is a total hack for Mesa - remove someday
	# fall-back to an old mklib.* script
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	LIBNAME="lib${LIBNAME}.a"
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	${TOP}/${MAKELIB} "lib${LIBNAME}.a" ${MAJOR} ${MINOR} ${PATCH} ${OBJECTS}
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	FINAL_LIBS="${LIBNAME}"
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	;;
esac


#
# Put library files into installation directory if specified.
#
if [ ${INSTALLDIR} != "." ] ; then
    echo "mklib: Installing" ${FINAL_LIBS} "in" ${INSTALLDIR}
    mv ${FINAL_LIBS} ${INSTALLDIR}/
fi