libbfd.so which Arch uses to redirect linking to the static library does not link in lstd.
The attached diff, does not seem to resolve the issue as linking still fails.

I haven't looked at toolchain stuff lately... but a quick glance reveals zstd is a new binutils dep. I haven't tested anything yet, but it seems likely this line in the PKGBUILD will need to be adjusted?

echo 'INPUT( /usr/lib/libbfd.a -liberty -lz -ldl )' > "$pkgdir/usr/lib/libbfd.so"

@loqs, Oh so is this is a project issue then not a arch core issue? My apologies, was just trying to do due diligence and report, just seemed weird that it broke because of a system package update.

@HcgRandon, please try this quick test:

1. Edit `/usr/lib/libbfd.so' (it's an ASCII text file) so that it reads:

INPUT( /usr/lib/libbfd.a -lzstd -liberty -lz -ldl )

Does that solve the problem?

No that seems to of made things much angrier:

/usr/bin/ld: /usr/lib/libbfd.a(elfxx-x86.o): in function `_bfd_x86_elf_write_sframe_plt.isra.0':
(.text+0xeaa): undefined reference to `sframe_encoder_write'
/usr/bin/ld: (.text+0xee2): undefined reference to `sframe_encoder_free'
/usr/bin/ld: /usr/lib/libbfd.a(elfxx-x86.o): in function `_bfd_x86_elf_create_sframe_plt.isra.0':
(.text+0xfe7): undefined reference to `sframe_encode'
/usr/bin/ld: (.text+0xff8): undefined reference to `sframe_calc_fre_type'
/usr/bin/ld: (.text+0x1004): undefined reference to `sframe_fde_create_func_info'
/usr/bin/ld: (.text+0x1019): undefined reference to `sframe_encoder_add_funcdesc'
/usr/bin/ld: (.text+0x1067): undefined reference to `sframe_encoder_add_fre'
/usr/bin/ld: (.text+0x10cf): undefined reference to `sframe_encode'
/usr/bin/ld: (.text+0x10e0): undefined reference to `sframe_calc_fre_type'
/usr/bin/ld: (.text+0x10ec): undefined reference to `sframe_fde_create_func_info'
/usr/bin/ld: (.text+0x1158): undefined reference to `sframe_encode'
/usr/bin/ld: (.text+0x1169): undefined reference to `sframe_calc_fre_type'
/usr/bin/ld: (.text+0x1175): undefined reference to `sframe_fde_create_func_info'
/usr/bin/ld: (.text+0x1194): undefined reference to `sframe_fde_create_func_info'
/usr/bin/ld: (.text+0x11ae): undefined reference to `sframe_encoder_add_funcdesc'
/usr/bin/ld: (.text+0x11f6): undefined reference to `sframe_encoder_add_fre'
/usr/bin/ld: (.text+0x124f): undefined reference to `sframe_encode'
/usr/bin/ld: /usr/lib/libbfd.a(elf-sframe.o): in function `_bfd_elf_parse_sframe':
(.text+0x13d): undefined reference to `sframe_decode'
/usr/bin/ld: (.text+0x157): undefined reference to `sframe_decoder_get_num_fidx'
/usr/bin/ld: (.text+0x287): undefined reference to `sframe_decoder_free'
/usr/bin/ld: /usr/lib/libbfd.a(elf-sframe.o): in function `_bfd_elf_discard_section_sframe':
(.text+0x2ec): undefined reference to `sframe_decoder_get_num_fidx'
/usr/bin/ld: /usr/lib/libbfd.a(elf-sframe.o): in function `_bfd_elf_merge_section_sframe':
(.text+0x757): undefined reference to `sframe_decoder_get_abi_arch'
/usr/bin/ld: (.text+0x762): undefined reference to `sframe_encoder_get_abi_arch'
/usr/bin/ld: (.text+0x778): undefined reference to `sframe_decoder_get_num_fidx'
/usr/bin/ld: (.text+0x787): undefined reference to `sframe_encoder_get_num_fidx'
/usr/bin/ld: (.text+0x818): undefined reference to `sframe_decoder_get_funcdesc'
/usr/bin/ld: (.text+0x869): undefined reference to `sframe_decoder_get_hdr_size'
/usr/bin/ld: (.text+0x8f2): undefined reference to `sframe_encoder_add_funcdesc'
/usr/bin/ld: (.text+0x92d): undefined reference to `sframe_decoder_get_fre'
/usr/bin/ld: (.text+0x945): undefined reference to `sframe_encoder_add_fre'
/usr/bin/ld: (.text+0x98d): undefined reference to `sframe_decoder_free'
/usr/bin/ld: (.text+0xb85): undefined reference to `sframe_decoder_get_abi_arch'
/usr/bin/ld: (.text+0xb96): undefined reference to `sframe_decoder_get_fixed_fp_offset'
/usr/bin/ld: (.text+0xba6): undefined reference to `sframe_decoder_get_fixed_ra_offset'
/usr/bin/ld: (.text+0xbcc): undefined reference to `sframe_encode'
/usr/bin/ld: /usr/lib/libbfd.a(elf-sframe.o): in function `_bfd_elf_write_section_sframe':
(.text+0xc89): undefined reference to `sframe_encoder_write'
/usr/bin/ld: (.text+0xcb7): undefined reference to `sframe_encoder_free'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/looking-glass-client.dir/build.make:492: looking-glass-client] Error 1
make[1]: *** [CMakeFiles/Makefile2:382: CMakeFiles/looking-glass-client.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

Ok, thanks for trying. Sorry for the "unhelpful" suggestion. Until we figure this out properly, you can always build looking-glass with:

cmake -DENABLE_BACKTRACE=no ../

which will avoid linking against binutils libbfd.

Needs libsframe as well
echo 'INPUT( /usr/lib/libbfd.a -lsframe -liberty -lz -lzstd -ldl )' > "$pkgdir/usr/lib/libbfd.so"

@HcgRandon sorry for the earlier noise.

Changes added to trunk. @HcgRandon please check loqs latest comment and report if that solves your issue.

The latest changes suggested by loqs seem to fix the build issue. Thanks for the quick response!

@frederik

Can confirm that the changes @loqs suggested have fixed the issue and things compile properly now. :D