opencascade @7.7.0: ld: internal error: atom not found in symbolIndex(__ZN11opencascade13type_instanceI18NCollection_BufferE3getEv)

[ryandesign (Ryan Carsten Schmidt)]

opencascade fails to build on 10.6, 10.8, 10.9, and 10.10 (but succeeds on 10.12 and later and, oddly, on 10.7):

​https://build.macports.org/builders/ports-10.10_x86_64-builder/builds/224641/steps/install-port/logs/stdio

ld: warning: option -s is obsolete and being ignored
ld: internal error: atom not found in symbolIndex(__ZN11opencascade13type_instanceI18NCollection_BufferE3getEv) for architecture x86_64

I remember that on some versions ld fails if the -s option is given (despite the warning saying it is being ignored because it is obsolete); maybe try removing this flag. See #59761 where that was the fix for this problem in another port.