--- /dev/null
+diff --git a/build/FreeBSD.gcc.inc b/build/FreeBSD.gcc.inc
+index dc22ca3..65dfb6e 100644
+--- a/build/FreeBSD.gcc.inc
++++ b/build/FreeBSD.gcc.inc
+@@ -28,8 +28,8 @@ WARNING_KEY = -Wall
+ DYLIB_KEY = -shared
+ WARNING_SUPPRESS = -Wno-parentheses
+
+-CPLUS = g++
+-CONLY = gcc
++CPLUS = $(CXX)
++CONLY = $(CC)
+ LIB_LINK_FLAGS = -shared
+ LIBS = -lpthread
+ C_FLAGS = $(CPLUS_FLAGS)
+@@ -42,7 +42,7 @@ ifneq (,$(shell gcc -dumpversion | egrep "^([6-9])"))
+ endif
+
+ ifeq ($(cfg), release)
+- CPLUS_FLAGS = -g -O2 -DUSE_PTHREAD
++ CPLUS_FLAGS = -g -DUSE_PTHREAD
+ endif
+ ifeq ($(cfg), debug)
+ CPLUS_FLAGS = -DTBB_USE_DEBUG -g -O0 -DUSE_PTHREAD
+@@ -59,22 +59,12 @@ ifeq (ia64,$(arch))
+ CPLUS_FLAGS += $(PIC_KEY)
+ endif
+
+-ifeq (intel64,$(arch))
+- CPLUS_FLAGS += -m64
+- LIB_LINK_FLAGS += -m64
+-endif
+-
+-ifeq (ia32,$(arch))
+- CPLUS_FLAGS += -m32
+- LIB_LINK_FLAGS += -m32
+-endif
+-
+ #------------------------------------------------------------------------------
+ # Setting assembler data.
+ #------------------------------------------------------------------------------
+ ASSEMBLY_SOURCE=$(arch)-gas
+ ifeq (ia64,$(arch))
+- ASM=as
++ ASM=$(AS)
+ TBB_ASM.OBJ = atomic_support.o lock_byte.o log2.o pause.o
+ MALLOC_ASM.OBJ = atomic_support.o lock_byte.o pause.o
+ endif
+diff --git a/build/linux.clang.inc b/build/linux.clang.inc
+index fc8d7de..21ad5d4 100644
+--- a/build/linux.clang.inc
++++ b/build/linux.clang.inc
+@@ -31,15 +31,15 @@ DYLIB_KEY = -shared
+ EXPORT_KEY = -Wl,--version-script,
+ LIBDL = -ldl
+
+-CPLUS = clang++
+-CONLY = clang
++CPLUS := $(CXX)
++CONLY := $(CC)
+ LIB_LINK_FLAGS = $(DYLIB_KEY) -Wl,-soname=$(BUILDING_LIBRARY)
+ LIBS += -lpthread -lrt
+ LINK_FLAGS = -Wl,-rpath-link=. -rdynamic
+ C_FLAGS = $(CPLUS_FLAGS)
+
+ ifeq ($(cfg), release)
+- CPLUS_FLAGS = $(ITT_NOTIFY) -g -O2 -DUSE_PTHREAD
++ CPLUS_FLAGS = $(ITT_NOTIFY) -g -DUSE_PTHREAD
+ endif
+ ifeq ($(cfg), debug)
+ CPLUS_FLAGS = -DTBB_USE_DEBUG $(ITT_NOTIFY) -g -O0 -DUSE_PTHREAD
+@@ -55,24 +55,10 @@ MALLOC_ASM.OBJ=
+
+ ifeq (intel64,$(arch))
+ ITT_NOTIFY = -DDO_ITT_NOTIFY
+- CPLUS_FLAGS += -m64
+- LIB_LINK_FLAGS += -m64
+ endif
+
+ ifeq (ia32,$(arch))
+ ITT_NOTIFY = -DDO_ITT_NOTIFY
+- CPLUS_FLAGS += -m32 -march=pentium4
+- LIB_LINK_FLAGS += -m32
+-endif
+-
+-ifeq (ppc64,$(arch))
+- CPLUS_FLAGS += -m64
+- LIB_LINK_FLAGS += -m64
+-endif
+-
+-ifeq (ppc32,$(arch))
+- CPLUS_FLAGS += -m32
+- LIB_LINK_FLAGS += -m32
+ endif
+
+ ifeq (bg,$(arch))
+@@ -84,12 +70,6 @@ endif
+ # Setting assembler data.
+ #------------------------------------------------------------------------------
+ ASM = as
+-ifeq (intel64,$(arch))
+- ASM_FLAGS += --64
+-endif
+-ifeq (ia32,$(arch))
+- ASM_FLAGS += --32
+-endif
+ ifeq ($(cfg),debug)
+ ASM_FLAGS += -g
+ endif
+diff --git a/build/linux.gcc.inc b/build/linux.gcc.inc
+index f9b483d..1e69789 100644
+--- a/build/linux.gcc.inc
++++ b/build/linux.gcc.inc
+@@ -32,12 +32,12 @@ DYLIB_KEY = -shared
+ EXPORT_KEY = -Wl,--version-script,
+ LIBDL = -ldl
+
+-CPLUS = g++
+-CONLY = gcc
++CPLUS := $(CXX)
++CONLY := $(CC)
+ LIB_LINK_FLAGS = $(DYLIB_KEY) -Wl,-soname=$(BUILDING_LIBRARY)
+ LIBS += -lpthread -lrt
+ LINK_FLAGS = -Wl,-rpath-link=. -rdynamic
+-C_FLAGS = $(CPLUS_FLAGS)
++C_FLAGS := $(CPLUS_FLAGS)
+
+ # gcc 4.2 and higher support OpenMP
+ ifneq (,$(shell gcc -dumpversion | egrep "^(4\.[2-9]|[5-9])"))
+@@ -57,7 +57,7 @@ ifneq (,$(shell gcc -dumpversion | egrep "^([6-9])"))
+ endif
+
+ ifeq ($(cfg), release)
+- CPLUS_FLAGS = $(ITT_NOTIFY) -g -O2 -DUSE_PTHREAD
++ CPLUS_FLAGS = $(ITT_NOTIFY) -g -DUSE_PTHREAD
+ endif
+ ifeq ($(cfg), debug)
+ CPLUS_FLAGS = -DTBB_USE_DEBUG $(ITT_NOTIFY) -g -O0 -DUSE_PTHREAD
+@@ -73,24 +73,12 @@ endif
+
+ ifeq (intel64,$(arch))
+ ITT_NOTIFY = -DDO_ITT_NOTIFY
+- CPLUS_FLAGS += -m64 $(RTM_KEY)
+- LIB_LINK_FLAGS += -m64
++ CPLUS_FLAGS += $(RTM_KEY)
+ endif
+
+ ifeq (ia32,$(arch))
+ ITT_NOTIFY = -DDO_ITT_NOTIFY
+- CPLUS_FLAGS += -m32 -march=pentium4 $(RTM_KEY)
+- LIB_LINK_FLAGS += -m32
+-endif
+-
+-ifeq (ppc64,$(arch))
+- CPLUS_FLAGS += -m64
+- LIB_LINK_FLAGS += -m64
+-endif
+-
+-ifeq (ppc32,$(arch))
+- CPLUS_FLAGS += -m32
+- LIB_LINK_FLAGS += -m32
++ CPLUS_FLAGS += $(RTM_KEY)
+ endif
+
+ ifeq (bg,$(arch))
+@@ -98,12 +86,6 @@ ifeq (bg,$(arch))
+ CONLY = $(firstword $(notdir $(shell which powerpc{64,32,}-bg{z..a}-linux-gcc 2>/dev/null)))
+ endif
+
+-# for some gcc versions on Solaris, -m64 may imply V9, but perhaps not everywhere (TODO: verify)
+-ifeq (sparc,$(arch))
+- CPLUS_FLAGS += -mcpu=v9 -m64
+- LIB_LINK_FLAGS += -mcpu=v9 -m64
+-endif
+-
+ # automatically generate "IT" instructions when compiling for Thumb ISA
+ ifeq (armv7,$(arch))
+ CPLUS_FLAGS += -Wa,-mimplicit-it=thumb
+@@ -112,13 +94,7 @@ endif
+ #------------------------------------------------------------------------------
+ # Setting assembler data.
+ #------------------------------------------------------------------------------
+-ASM = as
+-ifeq (intel64,$(arch))
+- ASM_FLAGS += --64
+-endif
+-ifeq (ia32,$(arch))
+- ASM_FLAGS += --32
+-endif
++ASM := $(AS)
+ ifeq ($(cfg),debug)
+ ASM_FLAGS += -g
+ endif
--- /dev/null
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit eutils flag-o-matic multilib-minimal toolchain-funcs versionator
+
+PV1="$(get_version_component_range 1)"
+PV2="$(get_version_component_range 2)"
+PV3="$(get_version_component_range 3)"
+MYP="${PN}${PV1}${PV2}_${PV3}oss"
+
+DESCRIPTION="High level abstract threading library"
+HOMEPAGE="http://www.threadingbuildingblocks.org/"
+SRC_URI="http://threadingbuildingblocks.org/sites/default/files/software_releases/source/${MYP}_src.tgz"
+LICENSE="GPL-2-with-exceptions"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~ppc ~ppc64 ~x86 ~amd64-fbsd ~amd64-linux ~x86-linux"
+IUSE="debug doc examples"
+
+DEPEND=""
+RDEPEND="${DEPEND}"
+S="${WORKDIR}/${MYP}"
+
+PATCHES=(
+ "${FILESDIR}"/${P}-underlinking.patch
+ "${FILESDIR}"/${P}-build.patch
+)
+
+src_prepare() {
+ default
+
+ find include -name \*.html -delete || die
+
+ # Give it a soname on FreeBSD
+ echo 'LIB_LINK_FLAGS += -Wl,-soname=$(BUILDING_LIBRARY)' >> build/FreeBSD.gcc.inc
+ # Set proper versionning on FreeBSD
+ sed -i -e '/.DLL =/s/$/.1/' build/FreeBSD.inc || die
+
+ use debug || sed -i -e '/_debug/d' Makefile
+}
+
+multilib_src_configure() {
+ # pc files are for debian and fedora compatibility
+ # some deps use them
+ cat <<-EOF > ${PN}.pc.template
+ prefix=${EPREFIX}/usr
+ libdir=\${prefix}/$(get_libdir)
+ includedir=\${prefix}/include
+ Name: ${PN}
+ Description: ${DESCRIPTION}
+ Version: ${PV}
+ URL: ${HOMEPAGE}
+ Cflags: -I\${includedir}
+ EOF
+ cp ${PN}.pc.template ${PN}.pc || die
+ cat <<-EOF >> ${PN}.pc
+ Libs: -L\${libdir} -ltbb
+ Libs.private: -lm -lrt
+ EOF
+ cp ${PN}.pc.template ${PN}malloc.pc || die
+ cat <<-EOF >> ${PN}malloc.pc
+ Libs: -L\${libdir} -ltbbmalloc
+ Libs.private: -lm -lrt
+ EOF
+ cp ${PN}.pc.template ${PN}malloc_proxy.pc || die
+ cat <<-EOF >> ${PN}malloc_proxy.pc
+ Libs: -L\${libdir} -ltbbmalloc_proxy
+ Libs.private: -lrt
+ Requires: tbbmalloc
+ EOF
+}
+
+local_src_compile() {
+ cd "${S}"
+
+ local comp arch
+
+ case ${MULTILIB_ABI_FLAG} in
+ abi_x86_64) arch=x86_64 ;;
+ abi_x86_32) arch=ia32 ;;
+ abi_ppc_64) arch=ppc64 ;;
+ abi_ppc_32) arch=ppc32 ;;
+ esac
+
+ case "$(tc-getCXX)" in
+ *g++*) comp="gcc" ;;
+ *ic*c) comp="icc" ;;
+ *clang*) comp="clang" ;;
+ *) die "compiler $(tc-getCXX) not supported by build system" ;;
+ esac
+
+ CXX="$(tc-getCXX)" \
+ CC="$(tc-getCC)" \
+ AS="$(tc-getAS)" \
+ arch=${arch} \
+ CPLUS_FLAGS="${CXXFLAGS}" \
+ emake compiler=${comp} work_dir="${BUILD_DIR}" tbb_root="${S}" $@
+}
+
+multilib_src_compile() {
+ local_src_compile tbb tbbmalloc
+}
+
+multilib_src_test() {
+ CXXFLAGS="${CXXFLAGS} -fabi-version=4" \
+ local_src_compile -j1 test
+}
+
+multilib_src_install() {
+ local bt
+ local buildtypes
+ if use debug ; then
+ buildtypes="release debug"
+ else
+ buildtypes="release"
+ fi
+ for bt in ${buildtypes}; do
+ cd "${BUILD_DIR}_${bt}" || die
+ local l
+ for l in $(find . -name lib\*.so.\*); do
+ dolib.so ${l}
+ local bl=$(basename ${l})
+ dosym ${bl} /usr/$(get_libdir)/${bl%.*}
+ done
+ done
+
+ cd "${BUILD_DIR}" || die
+ insinto /usr/$(get_libdir)/pkgconfig
+ doins *.pc
+}
+
+multilib_src_install_all() {
+ doheader -r include/*
+
+ dodoc README CHANGES doc/Release_Notes.txt
+ use doc && dohtml -r doc/html/*
+
+ if use examples ; then
+ insinto /usr/share/doc/${PF}/examples/build
+ doins build/*.inc
+ insinto /usr/share/doc/${PF}/examples
+ doins -r examples
+ fi
+}