When building OpenSSL 1.1.1b (see bug 1089) for ARM with the GCC5 toolchain(s), the following intrinsic functions are not found, and cause a link failure: __aeabi_ui2d __aeabi_d2uiz While OpenSSL should arguably not use floating point for anything (and in edk2, and generally in UEFI, floating point is discouraged), it seems that upgrading edk2's copy of ArmSoftFloatLib to the latest upstream release (= 3e) is the least painful way to resolve the above symbols.
Ard's v1 series on the list: [PATCH 0/3] update ArmSoftFloatLib to latest upstream version http://mid.mail-archive.com/20190524151140.23539-1-ard.biesheuvel@linaro.org https://edk2.groups.io/g/devel/message/41339
v2 posted to the list
(In reply to Ard Biesheuvel from comment #2) > v2 posted to the list [edk2-devel] [PATCH v2 0/7] update ArmSoftFloatLib to latest upstream version http://mid.mail-archive.com/20190527205141.12344-1-ard.biesheuvel@linaro.org https://edk2.groups.io/g/devel/message/41424
v3: [edk2-devel] [PATCH v3 0/7] update ArmSoftFloatLib to latest upstream version http://mid.mail-archive.com/20190531124958.8421-1-ard.biesheuvel@linaro.org https://edk2.groups.io/g/devel/message/41735 From this series, the following patches have been pushed: 85af0b8116f3 ArmPkg: import Berkeley Softfloat library as git submodule 3cc57695df5a ArmPkg/ArmSoftFloatLib: switch to new version of softfloat library 99243102b467 ArmPkg/ArmSoftFloatLib: remove source files that are no longer used 8594c2073cdb ArmPkg/ArmLib ARM: set .fpu to let Clang 7 assemble ArmV7Support.S The rest is being postponed until after edk2-stable201905. Another related commit (right on top, and right before the commits for bug 1089): 371e7001e8d5 ("ArmPkg/ArmSoftFloatLib GCC4x: fix build failure", 2019-06-01)
