Vivado_hls 2019.2 synthesis error

[Smitashree-code]

ERROR: [HLS 200-70] Compilation errors found: In file included from firmware/myproject.cpp:1:
In file included from firmware/myproject.cpp:4:
In file included from firmware/parameters.h:7:
In file included from firmware/nnet_utils/nnet_code_gen.h:4:
In file included from firmware/nnet_utils/nnet_conv1d_latency.h:4:
In file included from firmware/nnet_utils/nnet_common.h:5:
firmware/nnet_utils/nnet_helpers.h:275:10: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
for (auto i = 0; i < SIZE; i++)
^
firmware/nnet_utils/nnet_helpers.h:374:1: error: unknown type name 'constexpr'
constexpr int ceillog2(int x) { return (x <= 2) ? 1 : 1 + ceillog2((x + 1) / 2); }
^
firmware/nnet_utils/nnet_helpers.h:374:11: error: expected unqualified-id
constexpr int ceillog2(int x) { return (x <= 2) ? 1 : 1 + ceillog2((x + 1) / 2); }
^
firmware/nnet_utils/nnet_helpers.h:376:1: error: unknown type name 'constexpr'
constexpr int floorlog2(int x) { return (x < 2) ? 0 : 1 + floorlog2(x / 2); }
^
firmware/nnet_utils/nnet_helpers.h:376:11: error: expected unqualified-id
constexpr int floorlog2(int x) { return (x < 2) ? 0 : 1 + floorlog2(x / 2); }
^
firmware/nnet_utils/nnet_helpers.h:378:1: error: unknown type name 'constexpr'
constexpr int pow2(int x) { return x == 0 ? 1 : 2 * pow2(x - 1); }
^
firmware/nnet_utils/nnet_helpers.h:378:11: error: expected unqualified-id
constexpr int pow2(int x) { return x == 0 ? 1 : 2 * pow2(x - 1); }
^
In file included from firmware/myproject.cpp:1:
In file included from firmware/myproject.cpp:4:
In file included from firmware/parameters.h:7:
In file included from firmware/nnet_utils/nnet_code_gen.h:4:
In file included from firmware/nnet_utils/nnet_conv1d_latency.h:4:
firmware/nnet_utils/nnet_common.h:38:12: error: unknown type name 'constexpr'
static constexpr int leftN = pow2(floorlog2(N - 1)) > 0 ? pow2(floorlog2(N - 1)) : 0;
^
firmware/nnet_utils/nnet_common.h:38:22: error: expected unqualified-id
static constexpr int leftN = pow2(floorlog2(N - 1)) > 0 ? pow2(floorlog2(N - 1)) : 0;
^
firmware/nnet_utils/nnet_common.h:39:12: error: unknown type name 'constexpr'
static constexpr int rightN = N - leftN > 0 ? N - leftN : 0;
^
firmware/nnet_utils/nnet_common.h:39:22: error: expected unqualified-id
static constexpr int rightN = N - leftN > 0 ? N - leftN : 0;
^
firmware/nnet_utils/nnet_common.h:46:25: error: use of undeclared identifier 'leftN'
return op(reduce<T, leftN, Op>(x, op), reduce<T, rightN, Op>(x + leftN, op));
^
In file included from firmware/myproject.cpp:1:
In file included from firmware/myproject.cpp:4:
In file included from firmware/parameters.h:7:
In file included from firmware/nnet_utils/nnet_code_gen.h:4:
In file included from firmware/nnet_utils/nnet_conv1d_latency.h:5:
firmware/nnet_utils/nnet_mult.h:32:12: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
static auto product(x_T a, w_T w) -> decltype(-a) {
^
firmware/nnet_utils/nnet_mult.h:32:12: error: 'auto' not allowed in function return type
firmware/nnet_utils/nnet_mult.h:32:38: error: expected ';' at end of declaration list
static auto product(x_T a, w_T w) -> decltype(-a) {
^
;
firmware/nnet_utils/nnet_mult.h:44:12: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
static auto product(x_T a, w_T w) -> decltype(-w) {
^
firmware/nnet_utils/nnet_mult.h:44:12: error: 'auto' not allowed in function return type
firmware/nnet_utils/nnet_mult.h:44:38: error: expected ';' at end of declaration list
static auto product(x_T a, w_T w) -> decltype(-w) {
^
;
firmware/nnet_utils/nnet_mult.h:56:12: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
static auto product(x_T a, w_T w) -> decltype(-a) {
^
firmware/nnet_utils/nnet_mult.h:56:12: error: 'auto' not allowed in function return type
firmware/nnet_utils/nnet_mult.h:56:38: error: expected ';' at end of declaration list
static auto product(x_T a, w_T w) -> decltype(-a) {
^
;
firmware/nnet_utils/nnet_mult.h:70:12: warning: 'auto' type specifier is a C++11 extension [-Wc++11-extensions]
static auto product(x_T a, w_T w) -> decltype(a * w) {
^
firmware/nnet_utils/nnet_mult.h:70:12: error: 'auto' not allowed in function return type
firmware/nnet_utils/nnet_mult.h:70:38: error: expected ';' at end of declaration list
static auto product(x_T a, w_T w) -> decltype(a * w) {
^
;
firmware/nnet_utils/nnet_mult.h:79:17: warning: alias declarations are a C++11 extension [-Wc++11-extensions]
using r_T = ap_fixed<2 * (decltype(w_T::weight)::width + x_T::width), (decltype(w_T::weight)::width + x_T::width)>;
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
6 warnings and 20 errors generated.
Failed during preprocessing.
while executing
"source /home/smita/Desktop/model_outputs/hls4ml_project/p2/solution2/csynth.tcl"
invoked from within
"hls::main /home/smita/Desktop/model_outputs/hls4ml_project/p2/solution2/csynth.tcl"
("uplevel" body line 1)
invoked from within
"uplevel 1 hls::main {*}$args"
(procedure "hls_proc" line 5)
invoked from within
"hls_proc $argv" p2:solution2 Apr 29, 2025, 7:51:56 AM

[vloncar]

Can you try with 2020.1, or switch to Vitis HLS 2023.2 or newer? Not sure but maybe the 2019.2 doesn't work anymore. I see that the documentation says we support that version but it has been a long time since anyone tried to actually use it.

[Smitashree-code]

can I try with vitis HLS 2024.2 in window operating system?I have downloaded 2019.2 by seeing the documentation.

[JanFSchulte]

We support Vitis HLS 2024.1. 2024.2 will probably also work, but it is not fully validated. We do not support using hls4ml on Windows at all, see https://fastmachinelearning.org/hls4ml/intro/status.html.

[vloncar]

None of the developers use Windows, so we don't know if it works now or not. We know that the the python integration (calling compile()) won't work. Installing Vitis in the WSL environment and using it through that does work, that's the equivalent of having a linux installation.

[Smitashree-code]

Thank you.