342 # Export variables required for Zero

   343 if [ "${ZERO_BUILD}" = true ] ; then

   344   # ZERO_LIBARCH is the name of the architecture-specific

   345   # subdirectory under $JAVA_HOME/jre/lib

   346   arch=$(uname -m)

   347   case "${arch}" in

   348     x86_64)  ZERO_LIBARCH=amd64     ;;

   349     i?86)    ZERO_LIBARCH=i386      ;;

   350     sparc64) ZERO_LIBARCH=sparcv9   ;;

   351     arm*)    ZERO_LIBARCH=arm       ;;

   352     *)       ZERO_LIBARCH="$(arch)"

   353   esac

   354   export ZERO_LIBARCH

   355 

   356   # ARCH_DATA_MODEL is the number of bits in a pointer

   357   case "${ZERO_LIBARCH}" in

   358     i386|ppc|s390|sparc|arm)

   359       ARCH_DATA_MODEL=32

   360       ;;

   361     amd64|ppc64|s390x|sparcv9|ia64|alpha)

   362       ARCH_DATA_MODEL=64

   363       ;;

   364     *)

   365       echo "ERROR: Unable to determine ARCH_DATA_MODEL for ${ZERO_LIBARCH}"

   366       exit 1

   367   esac

   368   export ARCH_DATA_MODEL

   369 

   370   # ZERO_ENDIANNESS is the endianness of the processor

   371   case "${ZERO_LIBARCH}" in

   372     i386|amd64|ia64)

   373       ZERO_ENDIANNESS=little

   374       ;;

   375     ppc*|s390*|sparc*|alpha)

   376       ZERO_ENDIANNESS=big

   377       ;;

   378     *)

   379       echo "ERROR: Unable to determine ZERO_ENDIANNESS for ${ZERO_LIBARCH}"

   380       exit 1

   381   esac

   382   export ZERO_ENDIANNESS

   383 

   384   # ZERO_ARCHDEF is used to enable architecture-specific code

   385   case "${ZERO_LIBARCH}" in

   386     i386)   ZERO_ARCHDEF=IA32  ;;

   387     ppc*)   ZERO_ARCHDEF=PPC   ;;

   388     s390*)  ZERO_ARCHDEF=S390  ;;

   389     sparc*) ZERO_ARCHDEF=SPARC ;;

   390     *)      ZERO_ARCHDEF=$(echo "${ZERO_LIBARCH}" | tr a-z A-Z)

   391   esac

   392   export ZERO_ARCHDEF

   393 

   394   # ZERO_ARCHFLAG tells the compiler which mode to build for

   395   case "${ZERO_LIBARCH}" in

   396     s390)

   397       ZERO_ARCHFLAG="-m31"

   398       ;;

   399     *)

   400       ZERO_ARCHFLAG="-m${ARCH_DATA_MODEL}"

   401   esac

   402   export ZERO_ARCHFLAG

   403 

   404   # LIBFFI_CFLAGS and LIBFFI_LIBS tell the compiler how to compile and

   405   # link against libffi

   406   pkgconfig=$(which pkg-config 2>/dev/null)

   407   if [ -x "${pkgconfig}" ] ; then

   408     if [ "${LIBFFI_CFLAGS}" = "" ] ; then

   409       LIBFFI_CFLAGS=$("${pkgconfig}" --cflags libffi)

   410     fi

   411     if [ "${LIBFFI_LIBS}" = "" ] ; then

   412       LIBFFI_LIBS=$("${pkgconfig}" --libs libffi)

   413     fi

   414   fi

   415   if [ "${LIBFFI_LIBS}" = "" ] ; then

   416       LIBFFI_LIBS="-lffi"

   417   fi

   418   export LIBFFI_CFLAGS

   419   export LIBFFI_LIBS

   420 fi