dev-lang/ghc/ghc-7.10.3.ebuild

   1 # Copyright 1999-2020 Gentoo Authors
   2 # Distributed under the terms of the GNU General Public License v2
   3
   4 EAPI=5
   5
   6 # to make make a crosscompiler use crossdev and symlink ghc tree into
   7 # cross overlay. result would look like 'cross-sparc-unknown-linux-gnu/ghc'
   8 #
   9 # 'CTARGET' definition and 'is_crosscompile' are taken from 'toolchain.eclass'
  10 export CTARGET=${CTARGET:-${CHOST}}
  11 if [[ ${CTARGET} = ${CHOST} ]] ; then
  12         if [[ ${CATEGORY/cross-} != ${CATEGORY} ]] ; then
  13                 export CTARGET=${CATEGORY/cross-}
  14         fi
  15 fi
  16
  17 inherit autotools bash-completion-r1 eutils flag-o-matic ghc-package
  18 inherit multilib pax-utils toolchain-funcs versionator prefix
  19
  20 DESCRIPTION="The Glasgow Haskell Compiler"
  21 HOMEPAGE="https://www.haskell.org/ghc/"
  22
  23 # we don't have any binaries yet
  24 arch_binaries=""
  25
  26 # sorted!
  27 arch_binaries="$arch_binaries alpha? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-alpha.tbz2 )"
  28 #arch_binaries="$arch_binaries arm? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-arm.tbz2 )"
  29 arch_binaries="$arch_binaries amd64? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PVR}-amd64.tbz2 )"
  30 arch_binaries="$arch_binaries ia64?  ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-ia64.tbz2 )"
  31 arch_binaries="$arch_binaries ppc? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-ppc.tbz2 )"
  32 arch_binaries="$arch_binaries ppc64? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-ppc64.tbz2 )"
  33 arch_binaries="$arch_binaries sparc? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-sparc.tbz2 )"
  34 arch_binaries="$arch_binaries x86? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PVR}-x86.tbz2 )"
  35
  36 # various ports:
  37 #arch_binaries="$arch_binaries x86-fbsd? ( https://slyfox.uni.cx/~slyfox/distfiles/ghc-bin-${PV}-x86-fbsd.tbz2 )"
  38
  39 # 0 - yet
  40 yet_binary() {
  41         case "${ARCH}" in
  42                 alpha) return 0 ;;
  43                 #arm)
  44                 #       ewarn "ARM binary is built on armv5tel-eabi toolchain. Use with caution."
  45                 #       return 0
  46                 #;;
  47                 amd64) return 0 ;;
  48                 ia64) return 0 ;;
  49                 ppc) return 0 ;;
  50                 ppc64) return 0 ;;
  51                 sparc) return 0 ;;
  52                 x86) return 0 ;;
  53                 *) return 1 ;;
  54         esac
  55 }
  56
  57 GHC_PV=${PV}
  58 #GHC_PV=7.10.2.20151030 # uncomment only for -rc ebuilds
  59 GHC_P=${PN}-${GHC_PV} # using ${P} is almost never correct
  60
  61 SRC_URI="!binary? ( https://downloads.haskell.org/~ghc/${PV/_rc/-rc}/${GHC_P}-src.tar.bz2 )"
  62 S="${WORKDIR}"/${GHC_P}
  63
  64 [[ -n $arch_binaries ]] && SRC_URI+=" !ghcbootstrap? ( $arch_binaries )"
  65
  66 BUMP_LIBRARIES=(
  67         # "hackage-name          hackage-version"
  68         "binary                  0.7.6.1"
  69         "hoopl                   3.10.2.0"
  70         "transformers            0.4.3.0"
  71 )
  72
  73 LICENSE="BSD"
  74 SLOT="0/${PV}"
  75 KEYWORDS="amd64 ~ia64 ~ppc ~ppc64 x86 ~amd64-linux ~x86-linux"
  76 IUSE="doc ghcbootstrap ghcmakebinary +gmp"
  77 IUSE+=" binary"
  78 IUSE+=" elibc_glibc" # system stuff
  79
  80 RDEPEND="
  81         >=dev-lang/perl-5.6.1
  82         >=dev-libs/gmp-5:=
  83         sys-libs/ncurses:0=[unicode]
  84         !ghcmakebinary? ( dev-libs/libffi:= )
  85 "
  86
  87 # This set of dependencies is needed to run
  88 # prebuilt ghc. We specifically avoid ncurses
  89 # dependency with:
  90 #    utils/ghc-pkg_HC_OPTS += -DBOOTSTRAPPING
  91 PREBUILT_BINARY_DEPENDS="
  92         !prefix? ( elibc_glibc? ( >=sys-libs/glibc-2.17 ) )
  93 "
  94 # This set of dependencies is needed to install
  95 # ghc[binary] in system. terminfo package is linked
  96 # against ncurses.
  97 PREBUILT_BINARY_RDEPENDS="${PREBUILT_BINARY_DEPENDS}
  98         sys-libs/ncurses-compat:5
  99 "
 100
 101 RDEPEND+="binary? ( ${PREBUILT_BINARY_RDEPENDS} )"
 102
 103 DEPEND="${RDEPEND}
 104         doc? ( app-text/docbook-xml-dtd:4.2
 105                 app-text/docbook-xml-dtd:4.5
 106                 app-text/docbook-xsl-stylesheets
 107                 >=dev-libs/libxslt-1.1.2 )
 108         !ghcbootstrap? ( ${PREBUILT_BINARY_DEPENDS} )"
 109
 110 PDEPEND="!ghcbootstrap? ( =app-admin/haskell-updater-1.2* )"
 111
 112 REQUIRED_USE="?? ( ghcbootstrap binary )"
 113
 114 # haskell libraries built with cabal in configure mode, #515354
 115 QA_CONFIGURE_OPTIONS+=" --with-compiler --with-gcc"
 116
 117 is_crosscompile() {
 118         [[ ${CHOST} != ${CTARGET} ]]
 119 }
 120
 121 # returns tool prefix for crosscompiler.
 122 # Example:
 123 #  CTARGET=armv7a-unknown-linux-gnueabi
 124 #  CHOST=x86_64-pc-linux-gnu
 125 #    "armv7a-unknown-linux-gnueabi-"
 126 #  CTARGET=${CHOST}
 127 #    ""
 128 # Used in tools and library prefix:
 129 #    "${ED}"/usr/bin/$(cross)haddock
 130 #    "${ED}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d"
 131
 132 cross() {
 133         if is_crosscompile; then
 134                 echo "${CTARGET}-"
 135         else
 136                 echo ""
 137         fi
 138 }
 139
 140 append-ghc-cflags() {
 141         local persistent compile assemble link
 142         local flag ghcflag
 143
 144         for flag in $*; do
 145                 case ${flag} in
 146                         persistent)     persistent="yes";;
 147                         compile)        compile="yes";;
 148                         assemble)       assemble="yes";;
 149                         link)           link="yes";;
 150                         *)
 151                                 [[ ${compile}  ]] && ghcflag="-optc${flag}"  CFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
 152                                         [[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
 153                                 [[ ${assemble} ]] && ghcflag="-opta${flag}"  CFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
 154                                         [[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
 155                                 [[ ${link}     ]] && ghcflag="-optl${flag}" LDFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
 156                                         [[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
 157                                 ;;
 158                 esac
 159         done
 160 }
 161
 162 # $1 - lib name (under libraries/)
 163 # $2 - lib version
 164 # example: bump_lib "transformers" "0.4.2.0"
 165 bump_lib() {
 166         local pn=$1 pv=$2
 167         local p=${pn}-${pv}
 168         local f
 169
 170         einfo "Bumping ${pn} up to ${pv}"
 171
 172         for f in ghc.mk GNUmakefile; do
 173                 mv libraries/"${pn}"/$f "${WORKDIR}"/"${p}"/$f || die
 174         done
 175         mv libraries/"${pn}" "${WORKDIR}"/"${pn}".old || die
 176         mv "${WORKDIR}"/"${p}" libraries/"${pn}" || die
 177 }
 178
 179 update_SRC_URI() {
 180         local p pn pv
 181         for p in "${BUMP_LIBRARIES[@]}"; do
 182                 set -- $p
 183                 pn=$1 pv=$2
 184
 185                 SRC_URI+=" https://hackage.haskell.org/package/${pn}-${pv}/${pn}-${pv}.tar.gz"
 186         done
 187 }
 188
 189 update_SRC_URI
 190
 191 bump_libs() {
 192         local p pn pv
 193         for p in "${BUMP_LIBRARIES[@]}"; do
 194                 set -- $p
 195                 pn=$1 pv=$2
 196
 197                 bump_lib "${pn}" "${pv}"
 198         done
 199 }
 200
 201 ghc_setup_cflags() {
 202         if is_crosscompile; then
 203                 export CFLAGS=${GHC_CFLAGS-"-O2 -pipe"}
 204                 export LDFLAGS=${GHC_LDFLAGS-"-Wl,-O1"}
 205                 einfo "Crosscompiling mode:"
 206                 einfo "   CHOST:   ${CHOST}"
 207                 einfo "   CTARGET: ${CTARGET}"
 208                 einfo "   CFLAGS:  ${CFLAGS}"
 209                 einfo "   LDFLAGS: ${LDFLAGS}"
 210                 einfo "   prefix: $(cross)"
 211                 return
 212         fi
 213         # We need to be very careful with the CFLAGS we ask ghc to pass through to
 214         # gcc. There are plenty of flags which will make gcc produce output that
 215         # breaks ghc in various ways. The main ones we want to pass through are
 216         # -mcpu / -march flags. These are important for arches like alpha & sparc.
 217         # We also use these CFLAGS for building the C parts of ghc, ie the rts.
 218         strip-flags
 219         strip-unsupported-flags
 220
 221         # Cmm can't parse line numbers #482086
 222         replace-flags -ggdb[3-9] -ggdb2
 223
 224         GHC_FLAGS=""
 225         GHC_PERSISTENT_FLAGS=""
 226         for flag in ${CFLAGS}; do
 227                 case ${flag} in
 228
 229                         # Ignore extra optimisation (ghc passes -O to gcc anyway)
 230                         # -O2 and above break on too many systems
 231                         -O*) ;;
 232
 233                         # Arch and ABI flags are what we're really after
 234                         -m*) append-ghc-cflags compile assemble ${flag};;
 235
 236                         # Sometimes it's handy to see backtrace of RTS
 237                         # to get an idea what happens there
 238                         -g*) append-ghc-cflags compile ${flag};;
 239
 240                         # Ignore all other flags, including all -f* flags
 241                 esac
 242         done
 243
 244         for flag in ${LDFLAGS}; do
 245                 append-ghc-cflags link ${flag}
 246         done
 247
 248         # hardened-gcc needs to be disabled, because our prebuilt binaries/libraries
 249         # are not built with fPIC, bug #606666
 250         gcc-specs-pie && append-ghc-cflags persistent compile link -nopie
 251         tc-is-gcc && version_is_at_least 6.3 $(gcc-version) && if ! use ghcbootstrap; then
 252                 # gcc-6.3 has support for -no-pie upstream, but spelling differs from
 253                 # gentoo-specific '-nopie'. We enable it in non-bootstrap to allow
 254                 # hardened users try '-pie' in USE=ghcbootstrap mode.
 255                 append-ghc-cflags compile link -no-pie
 256         fi
 257         gcc-specs-ssp && append-ghc-cflags persistent compile      -fno-stack-protector
 258
 259         # prevent from failind building unregisterised ghc:
 260         # https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg171602.html
 261         use ppc64 && append-ghc-cflags persistent compile -mminimal-toc
 262         # fix the similar issue as ppc64 TOC on ia64. ia64 has limited size of small data
 263         # currently ghc fails to build haddock
 264         # https://osdir.com/ml/gnu.binutils.bugs/2004-10/msg00050.html
 265         use ia64 && append-ghc-cflags persistent compile -G0
 266 }
 267
 268 # substitutes string $1 to $2 in files $3 $4 ...
 269 relocate_path() {
 270         local from=$1
 271         local   to=$2
 272         shift 2
 273         local file=
 274         for file in "$@"
 275         do
 276                 sed -i -e "s|$from|$to|g" \
 277                         "$file" || die "path relocation failed for '$file'"
 278         done
 279 }
 280
 281 # changes hardcoded ghc paths and updates package index
 282 # $1 - new absolute root path
 283 relocate_ghc() {
 284         local to=$1
 285
 286         # libdir for prebuilt binary and for current system may mismatch
 287         # It does for prefix installation for example: bug #476998
 288         local bin_ghc_prefix=${WORKDIR}/usr
 289         local bin_libpath=$(echo "${bin_ghc_prefix}"/lib*)
 290         local bin_libdir=${bin_libpath#${bin_ghc_prefix}/}
 291
 292         # backup original script to use it later after relocation
 293         local gp_back="${T}/ghc-pkg-${GHC_PV}-orig"
 294         cp "${WORKDIR}/usr/bin/$(cross)ghc-pkg-${GHC_PV}" "$gp_back" || die "unable to backup ghc-pkg wrapper"
 295
 296         if [[ ${bin_libdir} != $(get_libdir) ]]; then
 297                 einfo "Relocating '${bin_libdir}' to '$(get_libdir)' (bug #476998)"
 298                 # moving the dir itself is not strictly needed
 299                 # but then USE=binary would result in installing
 300                 # in '${bin_libdir}'
 301                 mv "${bin_ghc_prefix}/${bin_libdir}" "${bin_ghc_prefix}/$(get_libdir)" || die
 302
 303                 relocate_path "/usr/${bin_libdir}" "/usr/$(get_libdir)" \
 304                         "${WORKDIR}/usr/bin/$(cross)ghc-${GHC_PV}" \
 305                         "${WORKDIR}/usr/bin/$(cross)ghci-${GHC_PV}" \
 306                         "${WORKDIR}/usr/bin/$(cross)ghc-pkg-${GHC_PV}" \
 307                         "${WORKDIR}/usr/bin/$(cross)hsc2hs" \
 308                         "${WORKDIR}/usr/bin/$(cross)runghc-${GHC_PV}" \
 309                         "$gp_back" \
 310                         "${WORKDIR}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d/"*
 311         fi
 312
 313         # Relocate from /usr to ${EPREFIX}/usr
 314         relocate_path "/usr" "${to}/usr" \
 315                 "${WORKDIR}/usr/bin/$(cross)ghc-${GHC_PV}" \
 316                 "${WORKDIR}/usr/bin/$(cross)ghci-${GHC_PV}" \
 317                 "${WORKDIR}/usr/bin/$(cross)ghc-pkg-${GHC_PV}" \
 318                 "${WORKDIR}/usr/bin/$(cross)hsc2hs" \
 319                 "${WORKDIR}/usr/bin/$(cross)runghc-${GHC_PV}" \
 320                 "${WORKDIR}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d/"*
 321
 322         # this one we will use to regenerate cache
 323         # so it should point to current tree location
 324         relocate_path "/usr" "${WORKDIR}/usr" "$gp_back"
 325
 326         if use prefix; then
 327                 hprefixify "${bin_libpath}"/${PN}*/settings
 328         fi
 329
 330         # regenerate the binary package cache
 331         "$gp_back" recache || die "failed to update cache after relocation"
 332         rm "$gp_back"
 333 }
 334
 335 pkg_setup() {
 336         # quiet portage about prebuilt binaries
 337         use binary && QA_PREBUILT="*"
 338
 339         [[ ${MERGE_TYPE} == binary ]] && return
 340
 341         if use ghcbootstrap; then
 342                 ewarn "You requested ghc bootstrapping, this is usually only used"
 343                 ewarn "by Gentoo developers to make binary .tbz2 packages."
 344
 345                 [[ -z $(type -P ghc) ]] && \
 346                         die "Could not find a ghc to bootstrap with."
 347         else
 348                 if ! yet_binary; then
 349                         eerror "Please try emerging with USE=ghcbootstrap and report build"
 350                         eerror "sucess or failure to the haskell team (haskell@gentoo.org)"
 351                         die "No binary available for '${ARCH}' arch yet, USE=ghcbootstrap"
 352                 fi
 353         fi
 354 }
 355
 356 src_unpack() {
 357         # Create the ${S} dir if we're using the binary version
 358         use binary && mkdir "${S}"
 359
 360         # the Solaris and Darwin binaries from ghc (maeder) need to be
 361         # unpacked separately, so prevent them from being unpacked
 362         local ONLYA=${A}
 363         case ${CHOST} in
 364                 *-darwin* | *-solaris*)  ONLYA=${GHC_P}-src.tar.bz2  ;;
 365         esac
 366         unpack ${ONLYA}
 367
 368         if [[ -d "${S}"/libraries/dph ]]; then
 369                 # Sometimes dph libs get accidentally shipped with ghc
 370                 # but they are not installed unless user requests it.
 371                 # We never install them.
 372                 elog "Removing 'libraries/dph'"
 373                 rm -rf "${S}"/libraries/dph
 374         fi
 375 }
 376
 377 src_prepare() {
 378         ghc_setup_cflags
 379
 380         if ! use ghcbootstrap && [[ ${CHOST} != *-darwin* && ${CHOST} != *-solaris* ]]; then
 381                 # Modify the wrapper script from the binary tarball to use GHC_PERSISTENT_FLAGS.
 382                 # See bug #313635.
 383                 sed -i -e "s|\"\$topdir\"|\"\$topdir\" ${GHC_PERSISTENT_FLAGS}|" \
 384                         "${WORKDIR}/usr/bin/$(cross)ghc-${GHC_PV}"
 385
 386                 # allow hardened users use vanilla binary to bootstrap ghc
 387                 # ghci uses mmap with rwx protection at it implements dynamic
 388                 # linking on it's own (bug #299709)
 389                 pax-mark -m "${WORKDIR}/usr/$(get_libdir)/$(cross)${GHC_P}/bin/ghc"
 390         fi
 391
 392         if use binary; then
 393                 if use prefix; then
 394                         relocate_ghc "${EPREFIX}"
 395                 fi
 396
 397                 # Move unpacked files to the expected place
 398                 mv "${WORKDIR}/usr" "${S}"
 399         else
 400                 if ! use ghcbootstrap; then
 401                         case ${CHOST} in
 402                                 *-darwin* | *-solaris*)
 403                                 # UPDATE ME for ghc-7
 404                                 mkdir "${WORKDIR}"/ghc-bin-installer || die
 405                                 pushd "${WORKDIR}"/ghc-bin-installer > /dev/null || die
 406                                 use sparc-solaris && unpack ghc-6.10.4-sparc-sun-solaris2.tar.bz2
 407                                 use x86-solaris && unpack ghc-7.0.3-i386-unknown-solaris2.tar.bz2
 408                                 use x86-macos && unpack ghc-7.4.1-i386-apple-darwin.tar.bz2
 409                                 use x64-macos && unpack ghc-7.4.1-x86_64-apple-darwin.tar.bz2
 410                                 popd > /dev/null
 411
 412                                 pushd "${WORKDIR}"/ghc-bin-installer/ghc-[67].?*.? > /dev/null || die
 413                                 # fix the binaries so they run, on Solaris we need an
 414                                 # LD_LIBRARY_PATH which has our prefix libdirs, on
 415                                 # Darwin we need to replace the frameworks with our libs
 416                                 # from the prefix fix before installation, because some
 417                                 # of the tools are actually used during configure/make
 418                                 if [[ ${CHOST} == *-solaris* ]] ; then
 419                                         export LD_LIBRARY_PATH="${EPREFIX}/$(get_libdir):${EPREFIX}/usr/$(get_libdir):${LD_LIBRARY_PATH}"
 420                                 elif [[ ${CHOST} == *-darwin* ]] ; then
 421                                         local readline_framework=GNUreadline.framework/GNUreadline
 422                                         local gmp_framework=/opt/local/lib/libgmp.10.dylib
 423                                         local ncurses_file=/opt/local/lib/libncurses.5.dylib
 424                                         for binary in $(scanmacho -BRE MH_EXECUTE -F '%F' .) ; do
 425                                                 install_name_tool -change \
 426                                                         ${readline_framework} \
 427                                                         "${EPREFIX}"/lib/libreadline.dylib \
 428                                                         ${binary} || die
 429                                                 install_name_tool -change \
 430                                                         ${gmp_framework} \
 431                                                         "${EPREFIX}"/usr/lib/libgmp.dylib \
 432                                                         ${binary} || die
 433                                                 install_name_tool -change \
 434                                                         ${ncurses_file} \
 435                                                         "${EPREFIX}"/usr/lib/libncurses.dylib \
 436                                                         ${binary} || die
 437                                         done
 438                                         # we don't do frameworks!
 439                                         sed -i \
 440                                                 -e 's/\(frameworks = \)\["GMP"\]/\1[]/g' \
 441                                                 -e 's/\(extraLibraries = \)\["m"\]/\1["m","gmp"]/g' \
 442                                                 rts/package.conf.in || die
 443                                 fi
 444
 445                                 # it is autoconf, but we really don't want to give it too
 446                                 # much arguments, in fact we do the make in-place anyway
 447                                 ./configure --prefix="${WORKDIR}"/usr || die
 448                                 make install || die
 449                                 popd > /dev/null
 450                                 ;;
 451                                 *)
 452                                 relocate_ghc "${WORKDIR}"
 453                                 ;;
 454                         esac
 455                 fi
 456
 457                 sed -i -e "s|\"\$topdir\"|\"\$topdir\" ${GHC_PERSISTENT_FLAGS}|" \
 458                         "${S}/ghc/ghc.wrapper"
 459
 460                 cd "${S}" # otherwise epatch will break
 461
 462                 epatch "${FILESDIR}"/${PN}-7.0.4-CHOST-prefix.patch
 463
 464                 epatch "${FILESDIR}"/${PN}-7.8.2-cgen-constify.patch
 465                 epatch "${FILESDIR}"/${PN}-7.8.3-prim-lm.patch
 466                 epatch "${FILESDIR}"/${PN}-7.10.1-rc3-ghc-7.10-bootstrap.patch
 467                 epatch "${FILESDIR}"/${PN}-7.10.3-relnotes.patch
 468                 epatch "${FILESDIR}"/${PN}-7.10.3-hardfloat.patch
 469
 470                 # Since ${S}/packages does not include base, etc. add them to gen_contents_index
 471                 sed -e 's@\(for REPO in .*\)@\1 base integer-gmp integer-gmp2 integer-simple template-haskell@' \
 472                         -i libraries/gen_contents_index || die
 473
 474                 if use prefix; then
 475                         # Make configure find docbook-xsl-stylesheets from Prefix
 476                         sed -e '/^FP_DIR_DOCBOOK_XSL/s:\[.*\]:['"${EPREFIX}"'/usr/share/sgml/docbook/xsl-stylesheets/]:' \
 477                                 -i utils/haddock/doc/configure.ac || die
 478                 fi
 479
 480                 bump_libs
 481
 482                 # as we have changed the build system
 483                 eautoreconf
 484         fi
 485 }
 486
 487 src_configure() {
 488         if ! use binary; then
 489                 # initialize build.mk
 490                 echo '# Gentoo changes' > mk/build.mk
 491
 492                 # Put docs into the right place, ie /usr/share/doc/ghc-${GHC_PV}
 493                 echo "docdir = ${EPREFIX}/usr/share/doc/${P}" >> mk/build.mk
 494                 echo "htmldir = ${EPREFIX}/usr/share/doc/${P}" >> mk/build.mk
 495
 496                 # We also need to use the GHC_FLAGS flags when building ghc itself
 497                 echo "SRC_HC_OPTS+=${HCFLAGS} ${GHC_FLAGS}" >> mk/build.mk
 498                 echo "SRC_CC_OPTS+=${CFLAGS}" >> mk/build.mk
 499                 echo "SRC_LD_OPTS+=${LDFLAGS}" >> mk/build.mk
 500
 501                 # We can't depend on haddock except when bootstrapping when we
 502                 # must build docs and include them into the binary .tbz2 package
 503                 # app-text/dblatex is not in portage, can not build PDF or PS
 504                 echo "BUILD_DOCBOOK_PDF  = NO"  >> mk/build.mk
 505                 echo "BUILD_DOCBOOK_PS   = NO"  >> mk/build.mk
 506                 if use doc; then
 507                         echo "BUILD_DOCBOOK_HTML = YES" >> mk/build.mk
 508                 else
 509                         echo "BUILD_DOCBOOK_HTML = NO" >> mk/build.mk
 510                 fi
 511
 512                 # this controls presence on 'xhtml' and 'haddock' in final install
 513                 echo "HADDOCK_DOCS       = YES" >> mk/build.mk
 514
 515                 # allows overriding build flavours for libraries:
 516                 # v   - vanilla (static libs)
 517                 # p   - profiled
 518                 # dyn - shared libraries
 519                 # example: GHC_LIBRARY_WAYS="v dyn"
 520                 if [[ -n ${GHC_LIBRARY_WAYS} ]]; then
 521                         echo "GhcLibWays=${GHC_LIBRARY_WAYS}" >> mk/build.mk
 522                 fi
 523
 524                 # Get ghc from the unpacked binary .tbz2
 525                 # except when bootstrapping we just pick ghc up off the path
 526                 if ! use ghcbootstrap; then
 527                         export PATH="${WORKDIR}/usr/bin:${PATH}"
 528                 fi
 529
 530                 if use gmp; then
 531                         echo "INTEGER_LIBRARY=integer-gmp2" >> mk/build.mk
 532                 else
 533                         echo "INTEGER_LIBRARY=integer-simple" >> mk/build.mk
 534                 fi
 535
 536                 # don't strip anything. Very useful when stage2 SIGSEGVs on you
 537                 echo "STRIP_CMD = :" >> mk/build.mk
 538
 539                 local econf_args=()
 540
 541                 # GHC embeds 'gcc' it was built by and uses it later.
 542                 # Don't allow things like ccache or versioned binary slip.
 543                 # We use stable thing across gcc upgrades.
 544                 is_crosscompile || econf_args+=(--with-gcc=${CHOST}-gcc)
 545
 546                 if use ghcmakebinary; then
 547                         # When building booting libary we are trying to
 548                         # bundle or restrict most of external depends
 549                         # with unstable ABI:
 550                         #  - embed libffi (default GHC behaviour)
 551                         #  - disable ncurses support for ghci (via haskeline)
 552                         #    https://bugs.gentoo.org/557478
 553                         #  - disable ncurses support for ghc-pkg
 554                         echo "libraries/haskeline_CONFIGURE_OPTS += --flag=-terminfo" >> mk/build.mk
 555                         echo "utils/ghc-pkg_HC_OPTS += -DBOOTSTRAPPING" >> mk/build.mk
 556                 else
 557                         econf_args+=(--with-system-libffi)
 558                         econf_args+=(--with-ffi-includes=$(pkg-config libffi --cflags-only-I | sed -e 's@^-I@@'))
 559                 fi
 560
 561                 elog "Final mk/build.mk:"
 562                 cat mk/build.mk || die
 563
 564                 econf ${econf_args[@]} --enable-bootstrap-with-devel-snapshot
 565
 566                 if [[ ${PV} == *9999* ]]; then
 567                         GHC_PV="$(grep 'S\[\"PACKAGE_VERSION\"\]' config.status | sed -e 's@^.*=\"\(.*\)\"@\1@')"
 568                         GHC_P=${PN}-${GHC_PV}
 569                 fi
 570         fi # ! use binary
 571 }
 572
 573 src_compile() {
 574         if ! use binary; then
 575                 # 1. build compiler binary first
 576                 emake ghc/stage2/build/tmp/ghc-stage2
 577                 # 2. pax-mark (bug #516430)
 578                 pax-mark -m ghc/stage2/build/tmp/ghc-stage2
 579                 # 3. and then all the rest
 580                 emake all
 581         fi # ! use binary
 582 }
 583
 584 src_install() {
 585         if use binary; then
 586                 use prefix && mkdir -p "${ED}"
 587                 mv "${S}/usr" "${ED}"
 588         else
 589
 590                 emake -j1 install DESTDIR="${D}"
 591                 dodoc "distrib/README" "ANNOUNCE" "LICENSE" "VERSION"
 592
 593                 # rename ghc-shipped files to avoid collision
 594                 # of external packages. Motivating example:
 595                 #  user had installed:
 596                 #      dev-lang/ghc-7.8.4-r0 (with transformers-0.3.0.0)
 597                 #      dev-haskell/transformers-0.4.2.0
 598                 #  then user tried to update to
 599                 #      dev-lang/ghc-7.8.4-r1 (with transformers-0.4.2.0)
 600                 #  this will lead to single .conf file collision.
 601                 local shipped_conf renamed_conf
 602                 local package_confdir="${ED}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d"
 603                 for shipped_conf in "${package_confdir}"/*.conf; do
 604                         # rename 'pkg-ver-id.conf' to 'pkg-ver-id-gentoo-${PF}.conf'
 605                         renamed_conf=${shipped_conf%.conf}-gentoo-${PF}.conf
 606                         mv "${shipped_conf}" "${renamed_conf}" || die
 607                 done
 608
 609                 # remove link, but leave 'haddock-${GHC_P}'
 610                 rm -f "${ED}"/usr/bin/$(cross)haddock
 611
 612                 if [[ ! -f "${S}/VERSION" ]]; then
 613                         echo "${GHC_PV}" > "${S}/VERSION" \
 614                                 || die "Could not create file ${S}/VERSION"
 615                 fi
 616                 if ! is_crosscompile; then
 617                         newbashcomp "${FILESDIR}"/ghc-bash-completion ghc-pkg
 618                         newbashcomp utils/completion/ghc.bash         ghc
 619                 fi
 620         fi
 621
 622         # path to the package.cache
 623         local package_confdir="${ED}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d"
 624         PKGCACHE="${package_confdir}"/package.cache
 625         # copy the package.conf.d, including timestamp, save it so we can help
 626         # users that have a broken package.conf.d
 627         cp -pR "${package_confdir}"{,.initial} || die "failed to backup intial package.conf.d"
 628
 629         # copy the package.conf, including timestamp, save it so we later can put it
 630         # back before uninstalling, or when upgrading.
 631         cp -p "${PKGCACHE}"{,.shipped} \
 632                 || die "failed to copy package.conf.d/package.cache"
 633 }
 634
 635 pkg_preinst() {
 636         # have we got an earlier version of ghc installed?
 637         if has_version "<${CATEGORY}/${PF}"; then
 638                 haskell_updater_warn="1"
 639         fi
 640 }
 641
 642 pkg_postinst() {
 643         ghc-reregister
 644
 645         # path to the package.cache
 646         PKGCACHE="${EROOT}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d/package.cache"
 647
 648         # give the cache a new timestamp, it must be as recent as
 649         # the package.conf.d directory.
 650         touch "${PKGCACHE}"
 651
 652         if [[ "${haskell_updater_warn}" == "1" ]]; then
 653                 ewarn
 654                 ewarn "\e[1;31m************************************************************************\e[0m"
 655                 ewarn
 656                 ewarn "You have just upgraded from an older version of GHC."
 657                 ewarn "You may have to run"
 658                 ewarn "      'haskell-updater'"
 659                 ewarn "to rebuild all ghc-based Haskell libraries."
 660                 ewarn
 661                 ewarn "\e[1;31m************************************************************************\e[0m"
 662                 ewarn
 663         fi
 664 }
 665
 666 pkg_prerm() {
 667         PKGCACHE="${EROOT}/usr/$(get_libdir)/$(cross)${GHC_P}/package.conf.d/package.cache"
 668         rm -rf "${PKGCACHE}"
 669
 670         cp -p "${PKGCACHE}"{.shipped,}
 671 }
 672
 673 pkg_postrm() {
 674         ghc-package_pkg_postrm
 675 }