Re: [PATCH v2 2/2] LoongArch: When the code model is extreme, the symbol address is obtained through macro instructions regardless of the value of -mexplicit-relocs.

[chenglulu <chenglulu@loongson.cn>]

在 2024/1/12 下午7:42, Xi Ruoyao 写道:
> 在 2024-01-12星期五的 09:46 +0800，chenglulu写道：
>
>>> I found an issue bootstrapping GCC with -mcmodel=extreme in BOOT_CFLAGS:
>>> we need a target hook to tell the generic code
>>> UNSPEC_LA_PCREL_64_PART{1,2} are just a wrapper around symbols, or we'll
>>> see millions lines of messages like
>>>
>>> ../../gcc/gcc/tree.h:4171:1: note: non-delegitimized UNSPEC
>>> UNSPEC_LA_PCREL_64_PART1 (42) found in variable location
>> I build GCC with -mcmodel=extreme in BOOT_CFLAGS, but I haven't reproduced the problem you mentioned.
>>
>>      $ ../configure --host=loongarch64-linux-gnu --target=loongarch64-linux-gnu --build=loongarch64-linux-gnu \
>>          --with-arch=loongarch64 --with-abi=lp64d --enable-tls --enable-languages=c,c++,fortran,lto --enable-plugin \
>>          --disable-multilib --disable-host-shared --enable-bootstrap --enable-checking=release
>>      $ make BOOT_FLAGS="-mcmodel=extreme"
>>
>> What did I do wrong?:-(
> BOOT_CFLAGS, not BOOT_FLAGS :).
>
This is so strange. My compilation here stopped due to syntax problems,

and I still haven't reproduced the information you mentioned about 
UNSPEC_LA_PCREL_64_PART1.