[lwip-users] compiling lwip using arm-gnu-toolchain-13.2.Rel1-x86_64-arm-none-eabi

[massimiliano cialdi]

    Hello,
      I am trying to compile with gcc 13.2 (from
      arm-gnu-toolchain-13.2.Rel1-x86_64-arm-none-eabi)
      I have some warnings when compile dhcp.c, and I cannot understand
      why:
      
      In function 'dhcp_option_byte',
            inlined from 'dhcp_discover' at
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1053:25:
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1453:30: warning: writing
        1 byte into a region of size 0 [-Wstringop-overflow=]
         1453 |   options[options_out_len++] = value;
              |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
        In file included from
        ThirdParties/lwip/src/include/lwip/arch.h:48,
                         from src/config/lwipopts.h:445,
                         from
        ThirdParties/lwip/src/include/lwip/opt.h:51,
                         from ThirdParties/lwip/src/core/ipv4/dhcp.c:66:
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h: In function
        'dhcp_discover':
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:26: note: at
        offset 68 into destination object 'options' of size 68
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |                          ^~~~~~~
        bsp/lwip/port/arch/cc.h:83:30: note: in definition of macro
        'PACK_STRUCT_FIELD'
           83 | #define PACK_STRUCT_FIELD(x) x
              |                              ^
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:3: note: in
        expansion of macro 'PACK_STRUCT_FLD_8'
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |   ^~~~~~~~~~~~~~~~~
        In function 'dhcp_option_byte',
            inlined from 'dhcp_reboot.isra' at
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1291:25:
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1453:30: warning: writing
        1 byte into a region of size 0 [-Wstringop-overflow=]
         1453 |   options[options_out_len++] = value;
              |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h: In function
        'dhcp_reboot.isra':
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:26: note: at
        offset 68 into destination object 'options' of size 68
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |                          ^~~~~~~
        bsp/lwip/port/arch/cc.h:83:30: note: in definition of macro
        'PACK_STRUCT_FIELD'
           83 | #define PACK_STRUCT_FIELD(x) x
              |                              ^
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:3: note: in
        expansion of macro 'PACK_STRUCT_FLD_8'
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |   ^~~~~~~~~~~~~~~~~
        In function 'dhcp_option_byte',
            inlined from 'dhcp_select.isra' at
        ThirdParties/lwip/src/core/ipv4/dhcp.c:478:25:
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1453:30: warning: writing
        1 byte into a region of size 0 [-Wstringop-overflow=]
         1453 |   options[options_out_len++] = value;
              |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h: In function
        'dhcp_select.isra':
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:26: note: at
        offset 68 into destination object 'options' of size 68
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |                          ^~~~~~~
        bsp/lwip/port/arch/cc.h:83:30: note: in definition of macro
        'PACK_STRUCT_FIELD'
           83 | #define PACK_STRUCT_FIELD(x) x
              |                              ^
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:3: note: in
        expansion of macro 'PACK_STRUCT_FLD_8'
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |   ^~~~~~~~~~~~~~~~~
        In function 'dhcp_option_byte',
            inlined from 'dhcp_renew' at
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1179:25:
        ThirdParties/lwip/src/core/ipv4/dhcp.c:1453:30: warning: writing
        1 byte into a region of size 0 [-Wstringop-overflow=]
         1453 |   options[options_out_len++] = value;
              |   ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h: In function
        'dhcp_renew':
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:26: note: at
        offset 68 into destination object 'options' of size 68
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |                          ^~~~~~~
        bsp/lwip/port/arch/cc.h:83:30: note: in definition of macro
        'PACK_STRUCT_FIELD'
           83 | #define PACK_STRUCT_FIELD(x) x
              |                              ^
        ThirdParties/lwip/src/include/lwip/prot/dhcp.h:90:3: note: in
        expansion of macro 'PACK_STRUCT_FLD_8'
           90 |   PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]);
              |   ^~~~~~~~~~~~~~~~~
        
      Do you guys have any idea?
      
      best regards

Massimiliano Cialdi

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