Re: [Libunwind-devel] Trying to build with PGI compiler

[Yichao Yu]

> configure:16113: checking link.h usability
> configure:16113:
> /cm/extra/apps/PGI.linux86-64/17.10/linux86-64/17.10/bin/pgc++ -c
> -noswitcherror -m64 -tp=px -I/usr/include conftest.c >&5
> "/usr/include/bits/link.h", line 97: error: identifier "__int128_t" is
>           undefined
>     __int128_t lr_bnd[4];
>     ^
>
> "/usr/include/bits/link.h", line 113: error: identifier "__int128_t" is
>           undefined
>     __int128_t lrv_bnd0;
>     ^
>
> "/usr/include/bits/link.h", line 114: error: identifier "__int128_t" is
>           undefined
>     __int128_t lrv_bnd1;
>     ^

Note that this is from the system header so it's unrelated to
libunwind. It's an incompatibility between the pgi compiler and glibc
so it should be reported to either of those....

>
> 3 errors detected in the compilation of "conftest.c".
>
> from the source lines
>
>      84 typedef struct La_x86_64_regs
>      85 {
>      86   uint64_t lr_rdx;
>      87   uint64_t lr_r8;
>      88   uint64_t lr_r9;
>      89   uint64_t lr_rcx;
>      90   uint64_t lr_rsi;
>      91   uint64_t lr_rdi;
>      92   uint64_t lr_rbp;
>      93   uint64_t lr_rsp;
>      94   La_x86_64_xmm lr_xmm[8];
>      95   La_x86_64_vector lr_vector[8];
>      96 #ifndef __ILP32__
>      97   __int128_t lr_bnd[4];
>      98 #endif
>      99 } La_x86_64_regs;
>     100
>     101 /* Return values for calls from PLT on x86-64.  */
>     102 typedef struct La_x86_64_retval
>     103 {
>     104   uint64_t lrv_rax;
>     105   uint64_t lrv_rdx;
>     106   La_x86_64_xmm lrv_xmm0;
>     107   La_x86_64_xmm lrv_xmm1;
>     108   long double lrv_st0;
>     109   long double lrv_st1;
>     110   La_x86_64_vector lrv_vector0;
>     111   La_x86_64_vector lrv_vector1;
>     112 #ifndef __ILP32__
>     113   __int128_t lrv_bnd0;
>     114   __int128_t lrv_bnd1;
>     115 #endif
>     116 } La_x86_64_retval;
>
> I'm guessing that the GCC compiler supports 128-bit integers but the PGI
> compiler does not.
> Do any of you know a way around this?
> From reading the documentation, it looks like libunwind had been tested with
> a lot of compilers, did they all support 128-bit integers?
> Thanks,
>
>                      Carl
>
>
>
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