if [ "$UNAME" = "Darwin" ]; then
    LDFLAGS="${LDFLAGS} -Wl,-rpath,${SAGE_LOCAL}/lib"
    export LDFLAGS
fi
cd src

# Issue #33054: primecount needs "-std=gnu++..."
# so it gains access to 128-bit integers for full functionality.
CXXFLAGS=$(echo "${CXXFLAGS}" | sed "s/-std=c++/-std=gnu++/g")
export CXXFLAGS

primc_config(){
echo "Configuring primecount: building primesieve $1"
# Issue #33082: WITH_POPCNT=OFF fixes the flawed logic in primecount 7.1
# build system that appends -mpopcnt to the compiler flags whenever
# the compiler supports it.  (Note that with gcc, WITH_POPCNT=OFF
# does NOT actually disable use of the popcount intrinsics.)

# Without CMAKE_NO_SYSTEM_FROM_IMPORTED=ON, cmake uses -isystem for
# the primesieve include directory. But when that is SAGE_LOCAL, per
# https://gcc.gnu.org/onlinedocs/gcc/Directory-Options.html, "If a
# standard system include directory, or a directory specified with
# -isystem, is also specified with -I, the -I option is ignored. The
# directory is still searched but as a system directory at its normal
# position in the system include chain."
# Thus this will cause system includes take precedence over SAGE_LOCAL/include.
# In particular, an old system package primesieve will take precedence
# over primesieve in SAGE_LOCAL.
sdh_cmake -DCMAKE_VERBOSE_MAKEFILE=ON \
          -DCMAKE_NO_SYSTEM_FROM_IMPORTED=ON \
          -DBUILD_STATIC_LIBS=OFF \
          -DBUILD_SHARED_LIBS=ON \
          -DBUILD_TESTS=ON \
          -DBUILD_LIBPRIMESIEVE=$1 \
          -DCMAKE_FIND_ROOT_PATH=$SAGE_LOCAL/lib/cmake \
          -DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=BOTH \
          -DCMAKE_INSTALL_PREFIX=$SAGE_LOCAL \
          -DWITH_POPCNT=OFF \
          . \
          && sdh_make_install
}

# we try to use the external primesieve first, and if
# cmake cannot find it, we build a vendored copy

(primc_config OFF) || primc_config ON