LTO Support

[Stevenlawrencehoriba]

Any idea when LTO support will be fixed to remove these type of warnings

.pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:32:7: warning: type 'struct EthernetClient' violates the C++ One Definition Rule [-Wodr] 32 | class EthernetClient : public Client { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.h:32:7: note: a different type is defined in another translation unit 32 | class EthernetClient : public Client { | ^ .pio\libdeps\teensy41_dbgxexram\QNEthernet\src/QNEthernetClient.h:176:47: note: the first difference of corresponding definitions is field 'conn' 176 | std::sharedptr conn; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.h:176:47: note: a field of same name but different type is defined in another translation unit 176 | std::sharedptr conn; | ^ C:/Users/Lawrences/.platformio/packages/toolchain-arm-cortexm-win64/arm-cortexm7f-eabi/include/c++/13.2.0/bits/shared_ptr.h:175:11: note: type 'struct shared_ptr' itself violates the C++ One Definition Rule 175 | class shared_ptr : public shared_ptr<_Tp> | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetServer.h:84:18: warning: 'accept' violates the C++ One Definition Rule [-Wodr] 84 | EthernetClient accept() const; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetServer.cpp:82:16: note: return value type mismatch 82 | EthernetClient EthernetServer::accept() const { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.h:32:7: note: type 'struct EthernetClient' itself violates the C++ One Definition Rule 32 | class EthernetClient : public Client { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:32:7: note: the incompatible type is defined here 32 | class EthernetClient : public Client { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetServer.cpp:82:16: note: 'accept' was previously declared here 82 | EthernetClient EthernetServer::accept() const { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetServer.cpp:82:16: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:118:8: warning: type of 'flush' does not match original declaration [-Wlto-type-mismatch] 118 | void flush() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:459:6: note: 'flush' was previously declared here 459 | void EthernetClient::flush() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:459:6: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:116:10: warning: type of 'write' does not match original declaration [-Wlto-type-mismatch] 116 | size_t write(const uint8_t buf, size_t size) final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:405:8: note: 'write' was previously declared here 405 | size_t EthernetClient::write(const uint8_t buf, size_t size) { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:405:8: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:64:11: warning: type of 'connected' does not match original declaration [-Wlto-type-mismatch] 64 | uint8_t connected() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:137:9: note: 'connected' was previously declared here 137 | uint8_t EthernetClient::connected() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:137:9: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:120:7: warning: type of 'available' does not match original declaration [-Wlto-type-mismatch] 120 | int available() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:483:5: note: 'available' was previously declared here 483 | int EthernetClient::available() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:483:5: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:74:8: warning: type of 'stop' does not match original declaration [-Wlto-type-mismatch] 74 | void stop() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:205:6: note: 'stop' was previously declared here 205 | void EthernetClient::stop() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:205:6: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:121:7: warning: type of 'read' does not match original declaration [-Wlto-type-mismatch] 121 | int read() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:516:5: note: 'read' was previously declared here 516 | int EthernetClient::read() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:516:5: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:65:12: warning: type of 'conv_op ' does not match original declaration [-Wlto-type-mismatch] 65 | explicit operator bool() final; | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:155:1: note: 'conv_op ' was previously declared here 155 | EthernetClient::operator bool() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:155:1: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:35:3: warning: type of '__dt_comp ' does not match original declaration [-Wlto-type-mismatch] 35 | ~EthernetClient(); | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:57:1: note: 'dt_comp ' was previously declared here 57 | EthernetClient::~EthernetClient() { | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:57:1: note: code may be misoptimized unless '-fno-strict-aliasing' is used .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src/QNEthernetClient.h:34:3: warning: type of '__ct_comp ' does not match original declaration [-Wlto-type-mismatch] 34 | EthernetClient(); | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:50:1: note: '__ct_comp ' was previously declared here 50 | EthernetClient::EthernetClient() : EthernetClient(nullptr) {} | ^ .pio\libdeps\teensy41_dbgx_exram\QNEthernet\src\QNEthernetClient.cpp:50:1: note: code may be misoptimized unless '-fno-strict-aliasing' is used lto-wrapper.exe: warning: using serial compilation of 6 LTRANS jobs lto-wrapper.exe: note: see the '-flto' option documentation for more information

[ssilverman]

I tried building with LTO but the build doesn't fail. I tried adding the -flto build flag, and I also tried with setting -DTEENSY_OPT_FASTER_LTO. I'm using PlatformIO.

What version of Teensyduino are you using? Is it possible you're not using the latest version?

[Stevenlawrencehoriba]

[env:teensy41_dbgx_exram] platform = https://github.com/tsandmann/platform-teensy.git board = teensy41 framework = arduino lib_deps = https://github.com/tsandmann/freertos-teensy.git https://github.com/PaulStoffregen/SPI https://github.com/greiman/SdFat https://github.com/nickgammon/Regexp ssilverman/QNEthernet@^0.25.0 build_Unflags = -std=gnu++17
build_flags = -std=gnu++20 -Wformat=1 -fno-strict-aliasing -Wno-deprecated -Wno-unused-variable -Wno-unused-parameter -D DEFAULT_TIME -D WAIT_SERIAL -D DEBUG_IFC -D DIAG_TASKS -D QSPI_RAM -DTEENSYDMX_USE_INTERVAL_TIMER -DTEENSY41_RTOS -DARDUINO_TEENSY41 -DUSB_SERIAL -DTEENSY_OPT_FASTER_LTO -DLWIP_MDNS_RESPONDER=0 monitor_speed = 115200 monitor_rts = 0

[ssilverman]

I can't seem to reproduce the build error. Do you still see the problem with the latest code?

[ssilverman]

Closing for now. Please reopen if this is still an issue for you.

[ssilverman]

I just noticed this, with the capital ‘U’: “build_Unflags” Try with “build_unflags” instead.