#!/usr/bin/env bash

DESTDIR="${DESTDIR:-/}"

pkglibdir="${pkglibdir:-/usr/lib/rpm}"

platformdir="${pkglibdir}/platform"

RPMRC="${1:-rpmrc}"

PLATFORM="${2:-platform}"

MACROS="${3:-macros}"

VENDOR="${4}"

OS="${5}"

RPMRC_GNU="${6}"

for ARCH in noarch `grep ^arch_canon $RPMRC | cut -d: -f2`; do

  RPMRC_OPTFLAGS="`sed -n 's/^optflags: '$ARCH' //p' $RPMRC`"

  RPMRC_OPTFLAGS="`echo $RPMRC_OPTFLAGS | sed -e 's, ,\ ,g'`"

  case $RPMRC_OPTFLAGS in

  *-g*) ;;

  *) RPMRC_OPTFLAGS="$RPMRC_OPTFLAGS -g" ;;

  esac

  ARCH_INSTALL_POST='%{nil}'

  LIB=lib

  # XXX FIXME: incomplete and quite likely wrong too in places,

  # consult various arch folks for correct names etc.

  ISANAME=

  ISABITS=

  CANONARCH=

  CANONCOLOR=

  FILTER=cat

  case "${ARCH}" in

    sparc64*) 

	ISANAME=sparc

	ISABITS=64

	CANONARCH=sparc64

	CANONCOLOR=3

	;;

    sparc*) 

	ISANAME=sparc

	ISABITS=32

	CANONARCH=sparc

	CANONCOLOR=0

	;;

    s390)

	ISANAME=s390

	ISABITS=32

	CANONARCH=s390

	CANONCOLOR=0

	;;

    s390x)

	ISANAME=s390

	ISABITS=64

	CANONARCH=s390x

	CANONCOLOR=3

	;;

    ppc64|ppc64p7)

	ISANAME=ppc

	ISABITS=64

	CANONARCH=ppc64

	CANONCOLOR=3

	;;

    ppc64le)

	ISANAME=ppc

        ISABITS=64

        CANONARCH=ppc64le

        CANONCOLOR=3

	;;

    ppc*)

	ISANAME=ppc

	ISABITS=32

	CANONARCH=ppc

	CANONCOLOR=0

	;;

    i?86|pentium?|athlon|geode)

	ISANAME=x86

	ISABITS=32

	CANONARCH=i386

	CANONCOLOR=0

	;;

    x86_64|amd64|ia32e)

	ISANAME=x86

	ISABITS=64

	CANONARCH=x86_64

	CANONCOLOR=3

	;;

    ia64)

	ISANAME=ia

	ISABITS=64

	CANONARCH=ia64

	CANONCOLOR=2

	;;

    sh*)

	ISANAME=sh

	ISABITS=32

	CANONARCH=${ARCH}

	CANONCOLOR=0

	;;

    armv7h*)

	ISANAME=armv7hl

	ISABITS=32

	CANONARCH=arm

	CANONCOLOR=0

	;;

    arm*)

	ISANAME=`echo ${ARCH} | sed "s/^\([^-]*\)-.*/\1/"`

	ISABITS=32

	CANONARCH=arm

	CANONCOLOR=0

	;;

    alpha*)

	ISANAME=alpha

	ISABITS=64

	CANONARCH=alpha

	CANONCOLOR=0

	;;

    aarch64)

	ISANAME=aarch

	ISABITS=64

	CANONARCH=aarch64

	CANONCOLOR=3

	;;

    mips)

	ISANAME=mips

	ISABITS=32

	CANONARCH=mips

	CANONCOLOR=0

	;;

    mipsel)

	ISANAME=mips

	ISABITS=32

	CANONARCH=mipsel

	CANONCOLOR=0

	;;

    mips64)

	ISANAME=mips

	ISABITS=64

	CANONARCH=mips64

	CANONCOLOR=3

	;;

    mips64el)

	ISANAME=mips

	ISABITS=64

	CANONARCH=mips64el

	CANONCOLOR=3

	;;

    mipsr6)

	ISANAME=mipsr6

	ISABITS=32

	CANONARCH=mipsr6

	CANONCOLOR=0

	;;

    mipsr6el)

	ISANAME=mipsr6

	ISABITS=32

	CANONARCH=mipsr6el

	CANONCOLOR=0

	;;

    mips64r6)

	ISANAME=mipsr6

	ISABITS=64

	CANONARCH=mips64r6

	CANONCOLOR=3

	;;

    mips64r6el)

	ISANAME=mipsr6

	ISABITS=64

	CANONARCH=mips64r6el

	CANONCOLOR=3

	;;

    m68k)

	ISANAME=m68k

	ISABITS=32

	CANONARCH=m68k

	CANONCOLOR=0

	;;

    riscv64)

	ISANAME=riscv

	ISABITS=64

	CANONARCH=riscv64

	CANONCOLOR=3

	;;

    noarch)

	CANONARCH=noarch

	CANONCOLOR=0

	FILTER="grep -v -E ^(%optflag|%__isa)"

	;;

  esac

  # skip architectures for which we dont have full config parameters

  [ -z "$CANONARCH" ] && continue

  if [ "$OS" = "linux" ] && [ "$CANONCOLOR" = 3 ]; then

      LIB=${LIB}64

  fi

  PPD="${DESTDIR}/${platformdir}/${ARCH}-${OS}"

  [ -d $PPD ] || mkdir -p $PPD

  cat $PLATFORM \

  | sed -e "s,@RPMRC_OPTFLAGS@,$RPMRC_OPTFLAGS," \

	-e "s,@RPMCANONARCH@,$CANONARCH,g" \

	-e "s,@RPMCANONCOLOR@,$CANONCOLOR," \

	-e "s,@RPMRC_GNU@,$RPMRC_GNU," \

	-e "s,@LIB@,$LIB," \

	-e "s,@ARCH_INSTALL_POST@,$ARCH_INSTALL_POST," \

	-e '/\${\w*:-/!s,\${,%{_,' \

	-e "s,@ISANAME@,$ISANAME," \

	-e "s,@ISABITS@,$ISABITS," \

	-e "s,^@${VENDOR}@,," \

  | grep -v '^@' \

  | ${FILTER} \

  > ${PPD}/macros

done

# gently adjust undefined autoconf variables to rpm macros...

cat $MACROS | sed -e 's,${prefix},%{_prefix},g' > ${DESTDIR}/${pkglibdir}/macros