On 4/1/20 10:06 AM, Joseph Myers wrote:
>
>> If public Version is removed, I get errors like below:
>
> What if you move it to GLIBC_PRIVATE? My concern isn't that it's exported
> from the shared library, it's that it's exported at a public version.
>
> A public version is only needed if there are references in code that might
> be statically linked into user binaries that use shared libc. Which means
> the symbol being used in some .o or .a file that gets linked into user
> binaries in that case (crt*.o, lib*_nonshared.a). You can examine the
> symbols used by such objects after building and installing glibc.
Moving it to GLIBC_PRIVATE seems to work too.
*Before*
arc-linux-readelf -a lib/libc-2.31.9000.so | grep syscall_error
1671: 0001b4b4 18 FUNC GLOBAL DEFAULT 11 __syscall_error@@GLIBC_2.32
4686: 0001b4b4 18 FUNC LOCAL DEFAULT 11 __GI___syscall_error
6286: 0001b4b4 18 FUNC GLOBAL DEFAULT 11 __syscall_error
arc-linux-readelf -a lib/librt-2.31.9000.so | grep syscall_error
00008054 00001f37 R_ARC_JMP_SLOT 00000000 __syscall_error@GLIBC_2.32 + 0
31: 00000000 0 FUNC GLOBAL DEFAULT UND __syscall_error@GLIBC_2.32 (3)
198: 00000000 0 FUNC GLOBAL DEFAULT UND __syscall_error@@GLIBC_2.
*Now*
arc-linux-readelf -a lib/libc-2.31.9000.so | grep syscall_error
1671: 0001b4b4 18 FUNC GLOBAL DEFAULT 11 __syscall_error@@GLIBC_PRIVATE
4686: 0001b4b4 18 FUNC LOCAL DEFAULT 11 __GI___syscall_error
6286: 0001b4b4 18 FUNC GLOBAL DEFAULT 11 __syscall_error
arc-linux-readelf -a lib/librt-2.31.9000.so | grep syscall_error
00008068 00002437 R_ARC_JMP_SLOT 00000000 __syscall_error@GLIBC_PRIVATE + 0
36: 00000000 0 FUNC GLOBAL DEFAULT UND __syscall_error@GLIBC_PRIVATE (4)
206: 00000000 0 FUNC GLOBAL DEFAULT UND __syscall_error@@GLIBC_PR
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