Xcode 10 not being able to archive project

We were able to get it to Archive with DSYM by removing optimizations for Swift Compile in the build settings.

Build Settings -> Swift Compiler - Code Generation -> Release

set to "No Optimizations"

Original fix suggested by JacobJ84 on Apple forum: https://forums.developer.apple.com/thread/115185

Finally, I removed "armv7" from "Valid Architectures" of project build settings. It archived! This means iPhone 4S is not compatible anymore. But, I don't think Apple will deprecate 4S in this way. By diving into the logs, I found that it stucks in creating dSYM symbols.

[17:15:49]: ▸ Generating 'ZUS_INHOUSE_DEV.app.dSYM'
[17:16:15]: ▸
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _lum_convert
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _ff_init_desc_hscale
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _lum_h_scale
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _ff_init_desc_cfmt_convert
[17:16:15]: ▸
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _ff_init_desc_chscale
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _chr_h_scale
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _ff_init_desc_no_chr
[17:16:15]: ▸ (arm64)  could not find object file symbol for symbol _no_chr_scale
[17:16:30]: ▸ (arm64)  could not find object file symbol for symbol _vlc_entry__audio_filter_libscaletempo_pitch
[17:16:30]: ▸
[17:16:30]: ▸
[17:16:30]: ▸
[17:16:30]: ▸
[17:16:30]: ▸
[17:16:30]: ▸
[17:16:30]: ▸ (arm64)  failed to insert symbol '_best_overlap_offset_float' in the debug map.

Thus, I guess, another workaround is change "Debug Infomation Format" from "DWARF with dSYM File" to "DWARF".