[SR-12539] Linker error: undefined symbols for architecture x86_64 #54983
Description
| Previous ID | SR-12539 |
| Radar | rdar://problem/62201716 |
| Original Reporter | ttflee (JIRA User) |
| Type | Bug |
| Status | Resolved |
| Resolution | Done |
Additional Detail from JIRA
| Votes | 0 |
| Component/s | Compiler |
| Labels | Bug |
| Assignee | None |
| Priority | Medium |
md5: 70212d26669214163e40f20b98fe5981
Issue Description:
When linking the following code on macOS 10.15.3 with Xcode Version 11.4 (11E146):
import Darwinvar errorfds = fd_set()
let fd = Int32(3)
if __darwin_fd_isset(fd, &errorfds) != 0 {
print(1)
}the following error occurred:
$ swiftc -v -o /tmp/1 /tmp/1.swift
Apple Swift version 5.2 (swiftlang-1103.0.32.1 clang-1103.0.32.29)
Target: x86_64-apple-darwin19.3.0
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift -frontend -c -primary-file /tmp/1.swift -target x86_64-apple-darwin19.3.0 -enable-objc-interop -stack-check -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -color-diagnostics -module-name main -o /var/folders/vy/9qq29vsj3w54s53l1mylw0cm0000gn/T/1-47974c.o
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld /var/folders/vy/9qq29vsj3w54s53l1mylw0cm0000gn/T/1-47974c.o /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/clang/lib/darwin/libclang_rt.osx.a -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -lobjc -lSystem -arch x86_64 -L /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/macosx -L /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk/usr/lib/swift -macosx_version_min 10.15.0 -no_objc_category_merging -o /tmp/1
Undefined symbols for architecture x86_64:
"___darwin_check_fd_set", referenced from:
_main in 1-47974c.o
ld: symbol(s) not found for architecture x86_64
<unknown>:0: error: link command failed with exit code 1 (use -v to see invocation)