Re: libcrypto.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64

[Jakob Bohm via openssl-users <openssl-users@xxxxxxxxxxx>]

This is a known deficiency of how Apple rushed adding support for their M1 ARM Desktop CPU to the XCode build suite.

When building a desktop macOs program file with XCode, it will implicitly try to build both an x86_64 and an arm64 variant, and will get very surprised your compiled open source library files contain only code for one of those architectures.

A potential workaround is to build OpenSSL for all 3 macOs desktop architectures and combine them with the "lipo" tool to create a "fat library".  The major shortcoming of this is that they use the same architecture "key" value for macOs and iOs, but require the libraries to be compiled differently (because the ABI for some system functions differ).  Before the M1 merge, this would work thanks to arm64 always being iOS hardware and x86_64 always being macOs hardware.  A workaround for that is to create a separate set of library files for iOS (including iOS emulator on x86-family desktops) and macOs (including x86-family and arm64 architectures), then being careful to reference the right set for each project.  Unfortunately, there is no workaround to use the same set of library files for iOS on arm64 mobile hardware and iOS emulator on arm64 desktop hardware.

On 2021-08-18 07:40, Stephen Dominic Liang wrote:

Hi. I installed OpenSSL 1.1 (MacOS 11.3.1) using Homebrew. I added the following to my .bash_profile:

export PKG_CONFIG_PATH="/opt/homebrew/opt/openssl@1.1/lib/pkgconfig"

I added this to the global path file at /etc/paths:

/opt/homebrew/opt/openssl@1.1/bin

I've tried a number of other steps. What are some other fixes/suggestions for debugging this issue? 

Errors:

/Applications/CLion.app/Contents/bin/cmake/mac/bin/cmake --build /Users/stephenjje/Documents/Je/test/cmake-build-debug --target test -- -j 6
[  2%] Linking C executable test
ld: warning: ignoring file /usr/local/Cellar/openssl@1.1/1.1.1k/lib/libcrypto.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
ld: warning: ignoring file /usr/local/Cellar/openssl@1.1/1.1.1k/lib/libssl.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
Undefined symbols for architecture arm64:
  "_ERR_print_errors_fp", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_OPENSSL_init_crypto", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
  "_OPENSSL_init_ssl", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
  "_SSL_CIPHER_get_name", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_CTX_free", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_CTX_new", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_CTX_use_PrivateKey_file", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
  "_SSL_CTX_use_certificate_file", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
  "_SSL_accept", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_connect", referenced from:
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_ctrl", referenced from:
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_free", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_get_current_cipher", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_get_peer_certificate", referenced from:
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_new", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_read", referenced from:
      _http_tcpip_inbound_parse_request in http_tcpip_inbound.c.o
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_set_fd", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_SSL_shutdown", referenced from:
      _http_tcpip_inbound_initialize in http_tcpip_inbound.c.o
  "_SSL_write", referenced from:
      _http_tcpip_inbound_send_response in http_tcpip_inbound.c.o
      _http_tcpip_outbound_request_send_type_tls in http_tcpip_outbound.c.o
  "_TLS_client_method", referenced from:
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
  "_TLS_server_method", referenced from:
      _http_tcpip_inbound_tls_initialize in http_tcpip_inbound.c.o
  "_X509_free", referenced from:
      _http_tcpip_outbound_get_url_using_string_type_tls in http_tcpip_outbound.c.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
gmake[3]: *** [CMakeFiles/test.dir/build.make:680: test] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:83: CMakeFiles/test.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:90: CMakeFiles/test.dir/rule] Error 2

Enjoy

Jakob
-- 
Jakob Bohm, CIO, Partner, WiseMo A/S.  https://www.wisemo.com
Transformervej 29, 2860 Søborg, Denmark.  Direct +45 31 13 16 10
This public discussion message is non-binding and may contain errors.
WiseMo - Remote Service Management for PCs, Phones and Embedded