Build issues in NIXL

[ovidiusm]

Hello,

We would like to upgrade the UCCL version used in the NIXL plugin, since we noticed a build issue on an ARM platform that seems to have been fixed in 4125009

The original problem we had was:

    1 [2026-02-17T11:34:45.665Z] g++ -c transport.cc -o transport.o -I./ -I/usr/local/cuda/include -I/tmp/tmp.d65YQJlcvd/uccl/include -O3 -g -std=c++17 -Wno-pointer-arith -Wno-interference-size -fPIC -DUSE_CUDA
    2 [2026-02-17T11:34:45.665Z] In file included from ../collective/rdma/pcie_test.cc:1:
    3 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:15: warning: use of 'std::hardware_destructive_interference_size' [-Winterference-size]
    4 [2026-02-17T11:34:45.666Z]   567 | static_assert(hardware_destructive_interference_size == 64);
    5 [2026-02-17T11:34:45.666Z]       |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    6 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:15: note: its value can vary between compiler versions or with different '-mtune' or '-mcpu' flags
    7 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:15: note: if this use is part of a public ABI, change it to instead use a constant variable you define
    8 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:15: note: the default value for the current CPU tuning is 256 bytes
    9 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:15: note: you can stabilize this value with '--param hardware_destructive_interference_size=256', or disable this warning with '-Wno-interference-size'
   10 [2026-02-17T11:34:45.666Z] ../include/util/util.h:567:54: error: static assertion failed
   11 [2026-02-17T11:34:45.666Z]   567 | static_assert(hardware_destructive_interference_size == 64);

However when switching UCCL_COMMIT_SHA to 4125009 we have other compilation errors that seem non trivial to resolve, see below

Could you please help? It's not clear to us how to address this.

[2026-02-16T15:40:43.000Z] [219/378] Compiling C++ object src/plugins/uccl/libplugin_UCCL.so.p/uccl_plugin.cpp.o
[2026-02-16T15:40:43.000Z] FAILED: src/plugins/uccl/libplugin_UCCL.so.p/uccl_plugin.cpp.o 
[2026-02-16T15:40:43.000Z] c++ -Isrc/plugins/uccl/libplugin_UCCL.so.p -Isrc/plugins/uccl -I../src/plugins/uccl -Isrc/api/cpp -I../src/api/cpp -I../src/api/cpp/backend -Isrc/infra -I../src/infra -Isrc/core -I../src/core -I../src/core/telemetry -Isrc/utils -I../src/utils -Isrc/utils/common -I../src/utils/common -Isubprojects/abseil-cpp-20240722.0 -I../subprojects/abseil-cpp-20240722.0 -I/usr/local/cuda/include -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Werror -std=c++17 -O0 -g -DHAVE_ETCD '-DNIXL_USE_PLUGIN_FILE="/workspace/nixl/nixl_build/pluginlist"' -fPIC -fPIC -MD -MQ src/plugins/uccl/libplugin_UCCL.so.p/uccl_plugin.cpp.o -MF src/plugins/uccl/libplugin_UCCL.so.p/uccl_plugin.cpp.o.d -o src/plugins/uccl/libplugin_UCCL.so.p/uccl_plugin.cpp.o -c ../src/plugins/uccl/uccl_plugin.cpp
[2026-02-16T15:40:43.000Z] In file included from /usr/local/include/uccl_engine.h:3,
[2026-02-16T15:40:43.000Z]                  from ../src/plugins/uccl/uccl_backend.h:35,
[2026-02-16T15:40:43.000Z]                  from ../src/plugins/uccl/uccl_plugin.cpp:19:
[2026-02-16T15:40:43.000Z] /usr/local/include/common.h: In function 'mooncake::IPv6ParseResult mooncake::extractIPv6HostAndPort(const std::string&)':
[2026-02-16T15:40:43.000Z] /usr/local/include/common.h:196:21: error: 'const std::string' {aka 'const class std::__cxx11::basic_string<char>'} has no member named 'starts_with'
[2026-02-16T15:40:43.000Z]   196 |     if (server_name.starts_with("[")) {
[2026-02-16T15:40:43.000Z]       |                     ^~~~~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h: At global scope:
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:91:35: error: 'FifoItem' has not been declared
[2026-02-16T15:40:43.000Z]    91 |                      size_t size, FifoItem fifo_item, uint64_t* transfer_id);
[2026-02-16T15:40:43.000Z]       |                                   ^~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:107:41: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.000Z]   107 |                             std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.000Z]       |                                         ^~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:107:49: error: template argument 1 is invalid
[2026-02-16T15:40:43.000Z]   107 |                             std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.000Z]       |                                                 ^
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:107:49: error: template argument 2 is invalid
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:146:36: error: 'FifoItem' has not been declared
[2026-02-16T15:40:43.000Z]   146 |                       size_t size, FifoItem fifo_item, uint64_t* transfer_id);
[2026-02-16T15:40:43.000Z]       |                                    ^~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:161:42: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.000Z]   161 |                              std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.000Z]       |                                          ^~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:161:50: error: template argument 1 is invalid
[2026-02-16T15:40:43.000Z]   161 |                              std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.000Z]       |                                                  ^
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:161:50: error: template argument 2 is invalid
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:237:29: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.000Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.000Z]       |                             ^~~~~~~~
[2026-02-16T15:40:43.000Z] /usr/local/include/uccl_engine.h:237:39: error: 'fifo_item' was not declared in this scope
[2026-02-16T15:40:43.000Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.001Z]       |                                       ^~~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:237:59: error: expected primary-expression before 'remote_addr'
[2026-02-16T15:40:43.001Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.001Z]       |                                                           ^~~~~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:238:38: error: expected primary-expression before 'size'
[2026-02-16T15:40:43.001Z]   238 |                             uint32_t size);
[2026-02-16T15:40:43.001Z]       |                                      ^~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:238:42: error: expression list treated as compound expression in initializer [-fpermissive]
[2026-02-16T15:40:43.001Z]   238 |                             uint32_t size);
[2026-02-16T15:40:43.001Z]       |                                          ^
[2026-02-16T15:40:43.001Z] [220/378] Compiling C++ object src/plugins/uccl/libplugin_UCCL.so.p/uccl_backend.cpp.o
[2026-02-16T15:40:43.001Z] FAILED: src/plugins/uccl/libplugin_UCCL.so.p/uccl_backend.cpp.o 
[2026-02-16T15:40:43.001Z] c++ -Isrc/plugins/uccl/libplugin_UCCL.so.p -Isrc/plugins/uccl -I../src/plugins/uccl -Isrc/api/cpp -I../src/api/cpp -I../src/api/cpp/backend -Isrc/infra -I../src/infra -Isrc/core -I../src/core -I../src/core/telemetry -Isrc/utils -I../src/utils -Isrc/utils/common -I../src/utils/common -Isubprojects/abseil-cpp-20240722.0 -I../subprojects/abseil-cpp-20240722.0 -I/usr/local/cuda/include -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Werror -std=c++17 -O0 -g -DHAVE_ETCD '-DNIXL_USE_PLUGIN_FILE="/workspace/nixl/nixl_build/pluginlist"' -fPIC -fPIC -MD -MQ src/plugins/uccl/libplugin_UCCL.so.p/uccl_backend.cpp.o -MF src/plugins/uccl/libplugin_UCCL.so.p/uccl_backend.cpp.o.d -o src/plugins/uccl/libplugin_UCCL.so.p/uccl_backend.cpp.o -c ../src/plugins/uccl/uccl_backend.cpp
[2026-02-16T15:40:43.001Z] In file included from /usr/local/include/uccl_engine.h:3,
[2026-02-16T15:40:43.001Z]                  from ../src/plugins/uccl/uccl_backend.h:35,
[2026-02-16T15:40:43.001Z]                  from ../src/plugins/uccl/uccl_backend.cpp:17:
[2026-02-16T15:40:43.001Z] /usr/local/include/common.h: In function 'mooncake::IPv6ParseResult mooncake::extractIPv6HostAndPort(const std::string&)':
[2026-02-16T15:40:43.001Z] /usr/local/include/common.h:196:21: error: 'const std::string' {aka 'const class std::__cxx11::basic_string<char>'} has no member named 'starts_with'
[2026-02-16T15:40:43.001Z]   196 |     if (server_name.starts_with("[")) {
[2026-02-16T15:40:43.001Z]       |                     ^~~~~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h: At global scope:
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:91:35: error: 'FifoItem' has not been declared
[2026-02-16T15:40:43.001Z]    91 |                      size_t size, FifoItem fifo_item, uint64_t* transfer_id);
[2026-02-16T15:40:43.001Z]       |                                   ^~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:107:41: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.001Z]   107 |                             std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.001Z]       |                                         ^~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:107:49: error: template argument 1 is invalid
[2026-02-16T15:40:43.001Z]   107 |                             std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.001Z]       |                                                 ^
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:107:49: error: template argument 2 is invalid
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:146:36: error: 'FifoItem' has not been declared
[2026-02-16T15:40:43.001Z]   146 |                       size_t size, FifoItem fifo_item, uint64_t* transfer_id);
[2026-02-16T15:40:43.001Z]       |                                    ^~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:161:42: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.001Z]   161 |                              std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.001Z]       |                                          ^~~~~~~~
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:161:50: error: template argument 1 is invalid
[2026-02-16T15:40:43.001Z]   161 |                              std::vector<FifoItem> fifo_items, int num_iovs,
[2026-02-16T15:40:43.001Z]       |                                                  ^
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:161:50: error: template argument 2 is invalid
[2026-02-16T15:40:43.001Z] /usr/local/include/uccl_engine.h:237:29: error: 'FifoItem' was not declared in this scope
[2026-02-16T15:40:43.002Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.002Z]       |                             ^~~~~~~~
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:237:39: error: 'fifo_item' was not declared in this scope
[2026-02-16T15:40:43.002Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.002Z]       |                                       ^~~~~~~~~
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:237:59: error: expected primary-expression before 'remote_addr'
[2026-02-16T15:40:43.002Z]   237 | int uccl_engine_update_fifo(FifoItem& fifo_item, uint64_t remote_addr,
[2026-02-16T15:40:43.002Z]       |                                                           ^~~~~~~~~~~
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:238:38: error: expected primary-expression before 'size'
[2026-02-16T15:40:43.002Z]   238 |                             uint32_t size);
[2026-02-16T15:40:43.002Z]       |                                      ^~~~
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:238:42: error: expression list treated as compound expression in initializer [-fpermissive]
[2026-02-16T15:40:43.002Z]   238 |                             uint32_t size);
[2026-02-16T15:40:43.002Z]       |                                          ^
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp: In destructor 'virtual nixlUcclEngine::~nixlUcclEngine()':
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:112:44: error: cannot convert 'uccl_mr_t*' {aka 'long unsigned int*'} to 'uccl_engine_t*' {aka 'uccl_engine*'}
[2026-02-16T15:40:43.002Z]   112 |                     uccl_engine_mr_destroy(mr);
[2026-02-16T15:40:43.002Z]       |                                            ^~
[2026-02-16T15:40:43.002Z]       |                                            |
[2026-02-16T15:40:43.002Z]       |                                            uccl_mr_t* {aka long unsigned int*}
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:191:44: note:   initializing argument 1 of 'void uccl_engine_mr_destroy(uccl_engine_t*, uccl_mr_t)'
[2026-02-16T15:40:43.002Z]   191 | void uccl_engine_mr_destroy(uccl_engine_t* engine, uccl_mr_t mr);
[2026-02-16T15:40:43.002Z]       |                             ~~~~~~~~~~~~~~~^~~~~~
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp: In member function 'virtual nixl_status_t nixlUcclEngine::registerMem(const nixlBlobDesc&, const nixl_mem_t&, nixlBackendMD*&)':
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:284:36: error: too few arguments to function 'int uccl_engine_reg(uccl_engine_t*, uintptr_t, size_t, uccl_mr_t&)'
[2026-02-16T15:40:43.002Z]   284 |     uccl_mr_t *mr = uccl_engine_reg(engine_, mem.addr, mem.len);
[2026-02-16T15:40:43.002Z]       |                     ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:77:5: note: declared here
[2026-02-16T15:40:43.002Z]    77 | int uccl_engine_reg(uccl_engine_t* engine, uintptr_t data, size_t size,
[2026-02-16T15:40:43.002Z]       |     ^~~~~~~~~~~~~~~
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp: In member function 'virtual nixl_status_t nixlUcclEngine::deregisterMem(nixlBackendMD*)':
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:314:36: error: cannot convert 'uccl_mr_t*' {aka 'long unsigned int*'} to 'uccl_engine_t*' {aka 'uccl_engine*'}
[2026-02-16T15:40:43.002Z]   314 |             uccl_engine_mr_destroy(mr);
[2026-02-16T15:40:43.002Z]       |                                    ^~
[2026-02-16T15:40:43.002Z]       |                                    |
[2026-02-16T15:40:43.002Z]       |                                    uccl_mr_t* {aka long unsigned int*}
[2026-02-16T15:40:43.002Z] /usr/local/include/uccl_engine.h:191:44: note:   initializing argument 1 of 'void uccl_engine_mr_destroy(uccl_engine_t*, uccl_mr_t)'
[2026-02-16T15:40:43.002Z]   191 | void uccl_engine_mr_destroy(uccl_engine_t* engine, uccl_mr_t mr);
[2026-02-16T15:40:43.002Z]       |                             ~~~~~~~~~~~~~~~^~~~~~
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp: In member function 'virtual nixl_status_t nixlUcclEngine::prepXfer(const nixl_xfer_op_t&, const nixl_meta_dlist_t&, const nixl_meta_dlist_t&, const std::string&, nixlBackendReqH*&, const nixl_opt_b_args_t*) const':
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:447:9: error: 'tx_msg_t' was not declared in this scope
[2026-02-16T15:40:43.002Z]   447 |         tx_msg_t tx_data;
[2026-02-16T15:40:43.002Z]       |         ^~~~~~~~
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:448:9: error: 'tx_data' was not declared in this scope
[2026-02-16T15:40:43.002Z]   448 |         tx_data.data_ptr = remote_addr;
[2026-02-16T15:40:43.002Z]       |         ^~~~~~~
[2026-02-16T15:40:43.002Z] ../src/plugins/uccl/uccl_backend.cpp:453:12: error: 'md_t' {aka 'struct md'} has no member named 'op'
[2026-02-16T15:40:43.002Z]   453 |         md.op = rcmode ? UCCL_RW_RC : UCCL_WRITE;
[2026-02-16T15:40:43.002Z]       |            ^~
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:453:26: error: 'UCCL_RW_RC' was not declared in this scope
[2026-02-16T15:40:43.003Z]   453 |         md.op = rcmode ? UCCL_RW_RC : UCCL_WRITE;
[2026-02-16T15:40:43.003Z]       |                          ^~~~~~~~~~
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:453:39: error: 'UCCL_WRITE' was not declared in this scope; did you mean 'NIXL_WRITE'?
[2026-02-16T15:40:43.003Z]   453 |         md.op = rcmode ? UCCL_RW_RC : UCCL_WRITE;
[2026-02-16T15:40:43.003Z]       |                                       ^~~~~~~~~~
[2026-02-16T15:40:43.003Z]       |                                       NIXL_WRITE
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:454:12: error: 'md_t' {aka 'struct md'} has no member named 'data'
[2026-02-16T15:40:43.003Z]   454 |         md.data.tx_data = tx_data;
[2026-02-16T15:40:43.003Z]       |            ^~~~
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:462:14: error: 'uccl_engine_send_tx_md_vector' was not declared in this scope; did you mean 'uccl_engine_send_vector'?
[2026-02-16T15:40:43.003Z]   462 |     result = uccl_engine_send_tx_md_vector(conn, md_vector.data(), md_vector.size());
[2026-02-16T15:40:43.003Z]       |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-16T15:40:43.003Z]       |              uccl_engine_send_vector
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:482:26: error: 'uccl_engine_get_fifo_item' was not declared in this scope; did you mean 'uccl_engine_get_notifs'?
[2026-02-16T15:40:43.003Z]   482 |                 result = uccl_engine_get_fifo_item(conn, i, &fifo_item);
[2026-02-16T15:40:43.003Z]       |                          ^~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-16T15:40:43.003Z]       |                          uccl_engine_get_notifs
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp: In member function 'virtual nixl_status_t nixlUcclEngine::postXfer(const nixl_xfer_op_t&, const nixl_meta_dlist_t&, const nixl_meta_dlist_t&, const std::string&, nixlBackendReqH*&, const nixl_opt_b_args_t*) const':
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:611:23: error: invalid conversion from 'uccl_mr_t*' {aka 'long unsigned int*'} to 'uccl_mr_t' {aka 'long unsigned int'} [-fpermissive]
[2026-02-16T15:40:43.003Z]   611 |                 conn, local_mr, (void *)local_addr, lsize, fifo_item_data, &transfer_id);
[2026-02-16T15:40:43.003Z]       |                       ^~~~~~~~
[2026-02-16T15:40:43.003Z]       |                       |
[2026-02-16T15:40:43.003Z]       |                       uccl_mr_t* {aka long unsigned int*}
[2026-02-16T15:40:43.003Z] /usr/local/include/uccl_engine.h:90:51: note:   initializing argument 2 of 'int uccl_engine_read(uccl_conn_t*, uccl_mr_t, const void*, size_t, int, uint64_t*)'
[2026-02-16T15:40:43.003Z]    90 | int uccl_engine_read(uccl_conn_t* conn, uccl_mr_t mr, void const* data,
[2026-02-16T15:40:43.003Z]       |                                         ~~~~~~~~~~^~
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:611:60: error: invalid conversion from 'char*' to 'int' [-fpermissive]
[2026-02-16T15:40:43.003Z]   611 |                 conn, local_mr, (void *)local_addr, lsize, fifo_item_data, &transfer_id);
[2026-02-16T15:40:43.003Z]       |                                                            ^~~~~~~~~~~~~~
[2026-02-16T15:40:43.003Z]       |                                                            |
[2026-02-16T15:40:43.003Z]       |                                                            char*
[2026-02-16T15:40:43.003Z] /usr/local/include/uccl_engine.h:91:44: note:   initializing argument 5 of 'int uccl_engine_read(uccl_conn_t*, uccl_mr_t, const void*, size_t, int, uint64_t*)'
[2026-02-16T15:40:43.003Z]    91 |                      size_t size, FifoItem fifo_item, uint64_t* transfer_id);
[2026-02-16T15:40:43.003Z]       |                                   ~~~~~~~~~^~~~~~~~~
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:616:26: error: 'uccl_engine_write_rc' was not declared in this scope; did you mean 'uccl_engine_write'?
[2026-02-16T15:40:43.003Z]   616 |                 result = uccl_engine_write_rc(
[2026-02-16T15:40:43.003Z]       |                          ^~~~~~~~~~~~~~~~~~~~
[2026-02-16T15:40:43.003Z]       |                          uccl_engine_write
[2026-02-16T15:40:43.003Z] ../src/plugins/uccl/uccl_backend.cpp:619:50: error: invalid conversion from 'uccl_mr_t*' {aka 'long unsigned int*'} to 'uccl_mr_t' {aka 'long unsigned int'} [-fpermissive]
[2026-02-16T15:40:43.003Z]   619 |                 result = uccl_engine_write(conn, local_mr, (void *)local_addr, lsize, &transfer_id);
[2026-02-16T15:40:43.003Z]       |                                                  ^~~~~~~~
[2026-02-16T15:40:43.004Z]       |                                                  |
[2026-02-16T15:40:43.004Z]       |                                                  uccl_mr_t* {aka long unsigned int*}
[2026-02-16T15:40:43.004Z] ../src/plugins/uccl/uccl_backend.cpp:619:87: error: invalid conversion from 'uint64_t*' {aka 'long unsigned int*'} to 'int' [-fpermissive]
[2026-02-16T15:40:43.004Z]   619 |                 result = uccl_engine_write(conn, local_mr, (void *)local_addr, lsize, &transfer_id);
[2026-02-16T15:40:43.004Z]       |                                                                                       ^~~~~~~~~~~~
[2026-02-16T15:40:43.004Z]       |                                                                                       |
[2026-02-16T15:40:43.004Z]       |                                                                                       uint64_t* {aka long unsigned int*}
[2026-02-16T15:40:43.004Z] ../src/plugins/uccl/uccl_backend.cpp:619:43: error: too few arguments to function 'int uccl_engine_write(uccl_conn_t*, uccl_mr_t, const void*, size_t, int, uint64_t*)'
[2026-02-16T15:40:43.004Z]   619 |                 result = uccl_engine_write(conn, local_mr, (void *)local_addr, lsize, &transfer_id);
[2026-02-16T15:40:43.004Z]       |                          ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[2026-02-16T15:40:43.004Z] /usr/local/include/uccl_engine.h:145:5: note: declared here
[2026-02-16T15:40:43.004Z]   145 | int uccl_engine_write(uccl_conn_t* conn, uccl_mr_t mr, void const* data,
[2026-02-16T15:40:43.004Z]       |     ^~~~~~~~~~~~~~~~~

[ovidiusm]

@praveingk FYI

[praveingk]

Thanks, I can take the fix in the PR ai-dynamo/nixl#1271 (comment) Get Outlook for iOS<https://aka.ms/o0ukef>

…

________________________________ From: ovidiusm ***@***.***> Sent: Tuesday, February 17, 2026 8:28:26 PM To: uccl-project/uccl ***@***.***> Cc: Pravein Govindan Kannan ***@***.***>; Mention ***@***.***> Subject: [EXTERNAL] Re: [uccl-project/uccl] Build issues in NIXL (Issue #732) ovidiusm left a comment (uccl-project/uccl#732) @praveingk FYI — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned. Message ID: <uccl-project/uccl/issues/732/3915210074@ github. com> [https://avatars.githubusercontent.com/u/197646403?s=20&v=4]ovidiusm left a comment (uccl-project/uccl#732)<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_uccl-2Dproject_uccl_issues_732-23issuecomment-2D3915210074&d=DwMCaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=olFFgDG__5Xqog8jsA4vrwIHod4ZgYgyauCv1ASFJfI&m=Oiw-38glYeFvv1d68uCyfMVz06SBnPHO7j_QFQLAcBBLIhQHH3y5Zg2dxx1Eq-5A&s=6tL6Qk3a99Pux-HxvRtTUenJ-YfDK99UWBMhvi9jpqo&e=> @praveingk<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_praveingk&d=DwMCaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=olFFgDG__5Xqog8jsA4vrwIHod4ZgYgyauCv1ASFJfI&m=Oiw-38glYeFvv1d68uCyfMVz06SBnPHO7j_QFQLAcBBLIhQHH3y5Zg2dxx1Eq-5A&s=HKt-U7yUepdnWoExz_OvzjGrTLTXK0SGv7Jl640sBgE&e=> FYI — Reply to this email directly, view it on GitHub<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_uccl-2Dproject_uccl_issues_732-23issuecomment-2D3915210074&d=DwMCaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=olFFgDG__5Xqog8jsA4vrwIHod4ZgYgyauCv1ASFJfI&m=Oiw-38glYeFvv1d68uCyfMVz06SBnPHO7j_QFQLAcBBLIhQHH3y5Zg2dxx1Eq-5A&s=6tL6Qk3a99Pux-HxvRtTUenJ-YfDK99UWBMhvi9jpqo&e=>, or unsubscribe<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_notifications_unsubscribe-2Dauth_ACL24WF7D2NK6GLAJGDSG5D4MMUBFAVCNFSM6AAAAACVNJLQBSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTSMJVGIYTAMBXGQ&d=DwMCaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=olFFgDG__5Xqog8jsA4vrwIHod4ZgYgyauCv1ASFJfI&m=Oiw-38glYeFvv1d68uCyfMVz06SBnPHO7j_QFQLAcBBLIhQHH3y5Zg2dxx1Eq-5A&s=AMFAu1luEp1nAJF38emAI35hC_Rlr-sDW699HSkvOGk&e=>. You are receiving this because you were mentioned.Message ID: ***@***.***>