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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