error occurs when compile sgx sdk: array subscript fi is outside array bounds of ‘const ecall_info_t[0]’

when compile sgx sdk in branch sgx_2.4, an error occured as follows:

/opt/linux-sgx/sdk/switchless/src/sl_workers.c:78:68: 错误：array subscript fi is outside array bounds of ‘const ecall_info_t[0]’ [-Werror=array-bounds]
78 | const ecall_info_t* ecall_info = &g_ecall_table.ecall_table[fi];
| ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
/opt/linux-sgx/sdk/switchless/src/sl_workers.c:60:21: 附注：while referencing ‘ecall_table’
60 | ecall_info_t ecall_table[0];
| ^~~~~~~~~~~
/opt/linux-sgx/sdk/switchless/src/sl_workers.c:78:68: 错误：array subscript fi is outside array bounds of ‘const ecall_info_t[0]’ [-Werror=array-bounds]
78 | const ecall_info_t* ecall_info = &g_ecall_table.ecall_table[fi];

Start with sdk/switchless/src/sl_workers.c, especially the ecall_table declaration around line 60 and the subscript access around line 78. Reproduce the sgx_2.4 build with the compiler settings that enable -Werror=array-bounds, then trace how the table is generated and used. Done means the SDK compiles without this array-bounds error.

Written by the indexing model from the issue text.