--- /dev/null
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+WX_GTK_VER="3.0"
+
+inherit autotools eapi7-ver elisp-common java-pkg-opt-2 systemd wxwidgets
+
+# NOTE: If you need symlinks for binaries please tell maintainers or
+# open up a bug to let it be created.
+
+UPSTREAM_V="$(ver_cut 1-2)"
+
+DESCRIPTION="Erlang programming language, runtime environment and libraries (OTP)"
+HOMEPAGE="https://www.erlang.org/"
+SRC_URI="https://github.com/erlang/otp/archive/OTP-${PV}.tar.gz -> ${P}.tar.gz
+ http://erlang.org/download/otp_doc_man_${UPSTREAM_V}.tar.gz -> ${PN}_doc_man_${UPSTREAM_V}.tar.gz
+ doc? ( http://erlang.org/download/otp_doc_html_${UPSTREAM_V}.tar.gz -> ${PN}_doc_html_${UPSTREAM_V}.tar.gz )"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~x64-solaris"
+IUSE="doc emacs +hipe java +kpoll libressl odbc pgo sctp ssl systemd tk wxwidgets"
+
+RDEPEND="
+ sys-libs/ncurses:0
+ sys-libs/zlib
+ emacs? ( virtual/emacs )
+ java? ( >=virtual/jdk-1.8:* )
+ odbc? ( dev-db/unixODBC )
+ sctp? ( net-misc/lksctp-tools )
+ ssl? (
+ !libressl? ( >=dev-libs/openssl-0.9.7d:0= )
+ libressl? ( dev-libs/libressl:0= )
+ )
+ systemd? ( sys-apps/systemd )
+ tk? ( dev-lang/tk:0 )
+ wxwidgets? ( x11-libs/wxGTK:${WX_GTK_VER}[X,opengl] )
+"
+DEPEND="${RDEPEND}
+ dev-lang/perl
+"
+
+S="${WORKDIR}/otp-OTP-${PV}"
+
+PATCHES=(
+ "${FILESDIR}/18.2.1-wx3.0.patch"
+ "${FILESDIR}/${PN}-20.3.2-dont-ignore-LDFLAGS.patch"
+ "${FILESDIR}/${PN}-add-epmd-pid-file-creation-for-openrc.patch"
+ "${FILESDIR}/${PN}-custom-autoconf.patch"
+ "${FILESDIR}/${PN}-21.3-lto.patch"
+)
+
+SITEFILE=50"${PN}"-gentoo.el
+
+src_prepare() {
+ default
+
+ ./otp_build autoconf
+ find -name configure.in -execdir mv '{}' configure.ac \; || die "find failed"
+ eautoreconf
+}
+
+src_configure() {
+ use wxwidgets && setup-wxwidgets
+
+ local myconf=(
+ --disable-builtin-zlib
+ $(use_enable hipe)
+ $(use_enable kpoll kernel-poll)
+ $(use_with java javac)
+ $(use_with odbc)
+ $(use_enable sctp)
+ $(use_with ssl ssl "${EPREFIX}"/usr)
+ $(use_enable ssl dynamic-ssl-lib)
+ $(use_enable systemd)
+ $(use_enable pgo)
+ $(usex wxwidgets "--with-wx-config=${WX_CONFIG}" "--with-wxdir=/dev/null")
+ --enable-threads
+ )
+ econf "${myconf[@]}"
+}
+
+src_compile() {
+ if use pgo; then
+ # disable distcc and ccache
+ export DISTCC_HOSTS=""
+ export CCACHE_DISABLE=1
+ fi
+
+ emake
+
+ if use emacs ; then
+ pushd lib/tools/emacs &>/dev/null || die
+ elisp-compile *.el
+ popd &>/dev/null || die
+ fi
+}
+
+extract_version() {
+ local path="$1"
+ local var_name="$2"
+ sed -n -e "/^${var_name} = \(.*\)$/s::\1:p" "${S}/${path}/vsn.mk" || die "extract_version() failed"
+}
+
+src_install() {
+ local erl_libdir_rel="$(get_libdir)/erlang"
+ local erl_libdir="/usr/${erl_libdir_rel}"
+ local erl_interface_ver="$(extract_version lib/erl_interface EI_VSN)"
+ local erl_erts_ver="$(extract_version erts VSN)"
+ local my_manpath="/usr/share/${PN}/man"
+
+ [[ -z "${erl_erts_ver}" ]] && die "Couldn't determine erts version"
+ [[ -z "${erl_interface_ver}" ]] && die "Couldn't determine interface version"
+
+ emake INSTALL_PREFIX="${D}" install
+
+ if use doc ; then
+ local DOCS=( "AUTHORS" "HOWTO"/* "README.md" "CONTRIBUTING.md" "${WORKDIR}"/doc/. "${WORKDIR}"/lib/. "${WORKDIR}"/erts-* )
+ docompress -x /usr/share/doc/${PF}
+ else
+ local DOCS=("README.md")
+ fi
+
+ einstalldocs
+
+ dosym "../${erl_libdir_rel}/bin/erl" /usr/bin/erl
+ dosym "../${erl_libdir_rel}/bin/erlc" /usr/bin/erlc
+ dosym "../${erl_libdir_rel}/bin/escript" /usr/bin/escript
+ dosym "../${erl_libdir_rel}/lib/erl_interface-${erl_interface_ver}/bin/erl_call" /usr/bin/erl_call
+ dosym "../${erl_libdir_rel}/erts-${erl_erts_ver}/bin/beam.smp" /usr/bin/beam.smp
+
+ ## Clean up the no longer needed files
+ rm "${ED}/${erl_libdir}/Install" || die
+
+ insinto "${my_manpath}"
+ doins -r "${WORKDIR}"/man/*
+ # extend MANPATH, so the normal man command can find it
+ # see bug 189639
+ newenvd - "90erlang" <<-_EOF_
+ MANPATH="${my_manpath}"
+ _EOF_
+
+ if use emacs ; then
+ elisp-install erlang lib/tools/emacs/*.{el,elc}
+ sed -e "s:/usr/share:${EPREFIX}/usr/share:g" \
+ "${FILESDIR}/${SITEFILE}" > "${T}/${SITEFILE}" || die
+ elisp-site-file-install "${T}/${SITEFILE}"
+ fi
+
+ newinitd "${FILESDIR}"/epmd.init epmd
+ use systemd && systemd_dounit "${FILESDIR}"/epmd.service
+}
+
+pkg_postinst() {
+ use emacs && elisp-site-regen
+}
+
+pkg_postrm() {
+ use emacs && elisp-site-regen
+}
--- /dev/null
+https://github.com/erlang/otp/pull/2194
+https://bugs.gentoo.org/681778
+
+From ed751968d8dc4c0b58210247e94409a8a52cc501 Mon Sep 17 00:00:00 2001
+From: Sergei Trofimovich <slyfox@gentoo.org>
+Date: Thu, 28 Mar 2019 08:38:56 +0000
+Subject: [PATCH] stdlib: fix re:replace on LTO builds
+
+Fabio Coatti reported elixir build failure in https://bugs.gentoo.org/681778.
+The minimal reproducer looks like that (from otp git tree):
+
+ $ ./configure CFLAGS='-O2 -flto' LDFLAGS='-O2 -flto=8'
+ $ make
+ $ ERL_TOP=$PWD \
+ PATH=$ERL_TOP/bin:$PATH \
+ \
+ bin/erl \
+ \
+ -noshell -eval 're:replace("a","b","c",[{return,list}]).' \
+ -s erlang halt
+
+ {"init terminating in do_boot",{badarg,[{re,replace,["a","b","c",[{return,list}]],
+ [{file,"re.erl"},{line,362}]},
+ {erl_eval,do_apply,6,[{file,"erl_eval.erl"},{line,680}]},
+ {init,start_it,1,[]},
+ {init,start_em,1,[]},
+ {init,do_boot,3,[]}]}}
+ init terminating in do_boot ({badarg,[{re,replace,[[_],[_],[_],[_]],[{_},{_}]},
+ {erl_eval,do_apply,6,[{_},{_}]},{init,start_it,1,[]},{init,start_em,1,[]},{init,do_boot,3,[]}]})
+ Crash dump is being written to: erl_crash.dump...done
+
+The failure happens in libpcre2 where stack overflow is mis-identified
+at function entry of
+
+ erts_pcre_compile2()
+ compile_regex()
+ if (PUBL(stack_guard) != NULL && PUBL(stack_guard)())
+ {
+ *errorcodeptr= ERR85;
+ return FALSE;
+ }
+
+The stack "overflow" detection happens in
+
+ thr_wrapper()
+ ethr_set_stacklimit__()
+
+because the stack usage code relies on the fact that ethr_set_stacklimit__()
+and similar functions don't get inlined into callers for stack growth
+measurement.
+
+Before the change inlining avoidance was achieved by putting functions
+into standalone translation units. LTO makes this technique inefficient.
+
+The change marks functions explicitly as __attribute__((__noinline__)) on gcc.
+
+Reported-by: Fabio Coatti
+Bug: https://bugs.gentoo.org/681778
+Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
+---
+ erts/emulator/beam/global.h | 9 +++++----
+ erts/emulator/beam/sys.h | 10 ++++++++++
+ erts/include/internal/ethr_internal.h | 2 +-
+ erts/include/internal/ethread_inline.h | 3 +++
+ 4 files changed, 19 insertions(+), 5 deletions(-)
+
+diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
+index f9bbe4167f9..4c8d3d3dbe6 100644
+--- a/erts/emulator/beam/global.h
++++ b/erts/emulator/beam/global.h
+@@ -1216,10 +1216,11 @@ Uint64 erts_timestamp_millis(void);
+
+ Export* erts_find_function(Eterm, Eterm, unsigned int, ErtsCodeIndex);
+
+-void *erts_calc_stacklimit(char *prev_c, UWord stacksize);
+-int erts_check_below_limit(char *ptr, char *limit);
+-int erts_check_above_limit(char *ptr, char *limit);
+-void *erts_ptr_id(void *ptr);
++/* ERTS_NOINLINE prevents link-time optimization across modules */
++void *erts_calc_stacklimit(char *prev_c, UWord stacksize) ERTS_NOINLINE;
++int erts_check_below_limit(char *ptr, char *limit) ERTS_NOINLINE;
++int erts_check_above_limit(char *ptr, char *limit) ERTS_NOINLINE;
++void *erts_ptr_id(void *ptr) ERTS_NOINLINE;
+
+ Eterm store_external_or_ref_in_proc_(Process *, Eterm);
+ Eterm store_external_or_ref_(Uint **, ErlOffHeap*, Eterm);
+diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
+index a6312293cc8..24b6738e082 100644
+--- a/erts/emulator/beam/sys.h
++++ b/erts/emulator/beam/sys.h
+@@ -63,6 +63,16 @@
+ # endif
+ #endif
+
++#ifndef ERTS_NOINLINE
++# if ERTS_AT_LEAST_GCC_VSN__(3,1,1)
++# define ERTS_NOINLINE __attribute__((__noinline__))
++# elif defined(__WIN32__)
++# define ERTS_NOINLINE __declspec(noinline)
++# else
++# define ERTS_NOINLINE
++# endif
++#endif
++
+ #if defined(DEBUG) || defined(ERTS_ENABLE_LOCK_CHECK)
+ # undef ERTS_CAN_INLINE
+ # define ERTS_CAN_INLINE 0
+diff --git a/erts/include/internal/ethr_internal.h b/erts/include/internal/ethr_internal.h
+index ac27ff2ed09..17ec84c52b6 100644
+--- a/erts/include/internal/ethr_internal.h
++++ b/erts/include/internal/ethr_internal.h
+@@ -90,7 +90,7 @@ int ethr_init_common__(ethr_init_data *id);
+ int ethr_late_init_common__(ethr_late_init_data *lid);
+ void ethr_run_exit_handlers__(void);
+ void ethr_ts_event_destructor__(void *vtsep);
+-void ethr_set_stacklimit__(char *prev_c, size_t stacksize);
++void ethr_set_stacklimit__(char *prev_c, size_t stacksize) ETHR_NOINLINE;
+
+ #if defined(ETHR_X86_RUNTIME_CONF__)
+ void ethr_x86_cpuid__(int *eax, int *ebx, int *ecx, int *edx);
+diff --git a/erts/include/internal/ethread_inline.h b/erts/include/internal/ethread_inline.h
+index 8e6bcfc4a8c..f25ba4ae721 100644
+--- a/erts/include/internal/ethread_inline.h
++++ b/erts/include/internal/ethread_inline.h
+@@ -62,12 +62,15 @@
+ # define ETHR_INLINE __inline__
+ # if ETHR_AT_LEAST_GCC_VSN__(3, 1, 1)
+ # define ETHR_FORCE_INLINE __inline__ __attribute__((__always_inline__))
++# define ETHR_NOINLINE __attribute__((__noinline__))
+ # else
+ # define ETHR_FORCE_INLINE __inline__
++# define ETHR_NOINLINE
+ # endif
+ #elif defined(__WIN32__)
+ # define ETHR_INLINE __forceinline
+ # define ETHR_FORCE_INLINE __forceinline
++# define ETHR_NOINLINE __declspec(noinline)
+ #endif
+
+ #endif /* #ifndef ETHREAD_INLINE_H__ */
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