--- /dev/null
+From d1d017390b799c59d6fdf7b8afa6136d218bdd61 Mon Sep 17 00:00:00 2001
+From: Benjamin Peterson <benjamin@dropbox.com>
+Date: Fri, 3 May 2019 08:11:00 -0700
+Subject: [PATCH] Rename gettid() functions.
+
+glibc 2.30 will declare its own gettid; see https://sourceware.org/git/?p=glibc.git;a=commit;h=1d0fc213824eaa2a8f8c4385daaa698ee8fb7c92. Rename the grpc versions to avoid naming conflicts.
+---
+ src/core/lib/gpr/log_linux.cc | 4 ++--
+ src/core/lib/gpr/log_posix.cc | 4 ++--
+ src/core/lib/iomgr/ev_epollex_linux.cc | 4 ++--
+ 3 files changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/src/core/lib/gpr/log_linux.cc b/src/core/lib/gpr/log_linux.cc
+index 561276f0c20..8b597b4cf2f 100644
+--- a/src/core/lib/gpr/log_linux.cc
++++ b/src/core/lib/gpr/log_linux.cc
+@@ -40,7 +40,7 @@
+ #include <time.h>
+ #include <unistd.h>
+
+-static long gettid(void) { return syscall(__NR_gettid); }
++static long sys_gettid(void) { return syscall(__NR_gettid); }
+
+ void gpr_log(const char* file, int line, gpr_log_severity severity,
+ const char* format, ...) {
+@@ -70,7 +70,7 @@ void gpr_default_log(gpr_log_func_args* args) {
+ gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME);
+ struct tm tm;
+ static __thread long tid = 0;
+- if (tid == 0) tid = gettid();
++ if (tid == 0) tid = sys_gettid();
+
+ timer = static_cast<time_t>(now.tv_sec);
+ final_slash = strrchr(args->file, '/');
+diff --git a/src/core/lib/gpr/log_posix.cc b/src/core/lib/gpr/log_posix.cc
+index b6edc14ab6b..2f7c6ce3760 100644
+--- a/src/core/lib/gpr/log_posix.cc
++++ b/src/core/lib/gpr/log_posix.cc
+@@ -31,7 +31,7 @@
+ #include <string.h>
+ #include <time.h>
+
+-static intptr_t gettid(void) { return (intptr_t)pthread_self(); }
++static intptr_t sys_gettid(void) { return (intptr_t)pthread_self(); }
+
+ void gpr_log(const char* file, int line, gpr_log_severity severity,
+ const char* format, ...) {
+@@ -86,7 +86,7 @@ void gpr_default_log(gpr_log_func_args* args) {
+ char* prefix;
+ gpr_asprintf(&prefix, "%s%s.%09d %7" PRIdPTR " %s:%d]",
+ gpr_log_severity_string(args->severity), time_buffer,
+- (int)(now.tv_nsec), gettid(), display_file, args->line);
++ (int)(now.tv_nsec), sys_gettid(), display_file, args->line);
+
+ fprintf(stderr, "%-70s %s\n", prefix, args->message);
+ gpr_free(prefix);
+diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
+index 08116b3ab53..76f59844312 100644
+--- a/src/core/lib/iomgr/ev_epollex_linux.cc
++++ b/src/core/lib/iomgr/ev_epollex_linux.cc
+@@ -1102,7 +1102,7 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
+ }
+
+ #ifndef NDEBUG
+-static long gettid(void) { return syscall(__NR_gettid); }
++static long sys_gettid(void) { return syscall(__NR_gettid); }
+ #endif
+
+ /* pollset->mu lock must be held by the caller before calling this.
+@@ -1122,7 +1122,7 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
+ #define WORKER_PTR (&worker)
+ #endif
+ #ifndef NDEBUG
+- WORKER_PTR->originator = gettid();
++ WORKER_PTR->originator = sys_gettid();
+ #endif
+ if (GRPC_TRACE_FLAG_ENABLED(grpc_polling_trace)) {
+ gpr_log(GPR_INFO,
--- /dev/null
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit flag-o-matic toolchain-funcs
+
+MY_PV="${PV//_pre/-pre}"
+
+DESCRIPTION="Modern open source high performance RPC framework"
+HOMEPAGE="https://www.grpc.io"
+SRC_URI="https://github.com/${PN}/${PN}/archive/v${MY_PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="examples doc perftools systemtap static-libs"
+
+DEPEND="
+ >=dev-libs/openssl-1.0.2:0=[-bindist]
+ >=dev-libs/protobuf-3.7.0:=
+ >=net-dns/c-ares-1.15.0:=
+ sys-libs/zlib:=
+ perftools? ( dev-util/google-perftools:= )
+ systemtap? ( dev-util/systemtap )
+"
+
+RDEPEND="${DEPEND}"
+BDEPEND="virtual/pkgconfig"
+
+# requires network
+RESTRICT="test"
+
+PATCHES=(
+ "${FILESDIR}/grpc-1.21.0-fix-host-ar-handling.patch"
+ "${FILESDIR}/grpc-1.3.0-Don-t-run-ldconfig.patch"
+ "${FILESDIR}/grpc-1.11.0-pkgconfig-libdir.patch"
+ "${FILESDIR}/grpc-1.22.0-cxx_arg_list_too_long_forloop.patch" # https://github.com/grpc/grpc/issues/14844
+ "${FILESDIR}/grpc-1.22.1-glibc-2.30-compat.patch" # https://github.com/grpc/grpc/pull/18950
+)
+
+S="${WORKDIR}/${PN}-${MY_PV}"
+
+src_prepare() {
+ rm -r third_party/cares || die
+ sed -i 's:-Werror::g' Makefile || die
+ sed -i 's@$(prefix)/lib@$(prefix)/$(INSTALL_LIBDIR)@g' Makefile || die "fix libdir"
+
+ default
+}
+
+src_compile() {
+ tc-export CC CXX PKG_CONFIG
+
+ local myemakeargs=(
+ V=1
+ prefix=/usr
+ INSTALL_LIBDIR="$(get_libdir)"
+ AR="$(tc-getAR)"
+ AROPTS="rcs"
+ CFLAGS="${CFLAGS}"
+ CXXFLAGS="${CXXFLAGS}"
+ LD="${CC}"
+ LDXX="${CXX}"
+ STRIP=/bin/true
+ HOST_AR="$(tc-getBUILD_AR)"
+ HOST_CC="$(tc-getBUILD_CC)"
+ HOST_CXX="$(tc-getBUILD_CXX)"
+ HOST_LD="$(tc-getBUILD_CC)"
+ HOST_LDXX="$(tc-getBUILD_CXX)"
+ HAS_SYSTEM_PERFTOOLS="$(usex perftools true false)"
+ HAS_SYSTEMTAP="$(usex systemtap true false)"
+ )
+
+ emake "${myemakeargs[@]}"
+}
+
+src_install() {
+ local myemakeargs=(
+ V=1
+ prefix="${ED}"/usr
+ INSTALL_LIBDIR="$(get_libdir)"
+ STRIP=/bin/true
+ )
+
+ emake "${myemakeargs[@]}" install
+
+ use static-libs || find "${ED}" -name '*.a' -delete
+
+ if use examples; then
+ find examples -name '.gitignore' -delete || die
+ dodoc -r examples
+ docompress -x /usr/share/doc/${PF}/examples
+ fi
+
+ if use doc; then
+ find doc -name '.gitignore' -delete || die
+ local DOCS=( AUTHORS CONCEPTS.md README.md TROUBLESHOOTING.md doc/. )
+ fi
+
+ einstalldocs
+}
+
+pkg_postinst() {
+ local v
+ for v in ${REPLACING_VERSIONS}; do
+ if ver_test "${v}" -lt 1.16.0; then
+ ewarn "python bindings and tools moved to separate independent packages"
+ ewarn "check dev-python/grpcio and dev-python/grpcio-tools"
+ fi
+ done
+
+}