[llvm-bugs] [Bug 28855] New: clang 3.8.1 fails to link i386 macOS due to eprintf.c.o incorrectly being included in libclang_rt.osx.a

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=28855

            Bug ID: 28855
           Summary: clang 3.8.1 fails to link i386 macOS due to
                    eprintf.c.o incorrectly being included in
                    libclang_rt.osx.a
           Product: compiler-rt
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: compiler-rt
          Assignee: unassignedbugs at nondot.org
          Reporter: jeremyhu at apple.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

On MacPorts, our clang-3.8 port (built from the 3.8.1 tarballs) fails to link
for i386 macOS because the built libclang_rt.osx.a incorrectly includes
eprintf.c.o


$ clang-mp-3.8 -arch i386 -bundle -undefined error -o libsasldb.plugin
sasldb.lo sasldb_init.lo plugin_common.lo -all_load libsasldb.al -lresolv -v
-Wl,-v
clang version 3.8.1 (tags/RELEASE_381/final)
Target: i386-apple-darwin16.0.0
Thread model: posix
InstalledDir: /opt/local/libexec/llvm-3.8/bin
 "/opt/local/bin/ld" -demangle -dynamic -arch i386 -bundle -all_load
-macosx_version_min 10.12.0 -undefined error -undefined error -o
libsasldb.plugin sasldb.lo sasldb_init.lo plugin_common.lo libsasldb.al
-lresolv -v -lSystem
/opt/local/libexec/llvm-3.8/bin/../lib/clang/3.8.1/lib/darwin/libclang_rt.eprintf.a
/opt/local/libexec/llvm-3.8/bin/../lib/clang/3.8.1/lib/darwin/libclang_rt.osx.a
@(#)PROGRAM:ld  PROJECT:ld64-274
configured to support archs: armv6 armv7 armv7s arm64 i386 x86_64 x86_64h
armv6m armv7k armv7m armv7em (tvOS)
Library search paths:
    /usr/lib
    /usr/local/lib
Framework search paths:
    /Library/Frameworks/
    /System/Library/Frameworks/
duplicate symbol ___eprintf in:
   
/opt/local/libexec/llvm-3.8/bin/../lib/clang/3.8.1/lib/darwin/libclang_rt.eprintf.a(eprintf.c.o)
   
/opt/local/libexec/llvm-3.8/bin/../lib/clang/3.8.1/lib/darwin/libclang_rt.osx.a(eprintf.c.o)
ld: 1 duplicate symbol for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

---

The issue is still present recently on the release_39 branch:

~/tmp/bug $ nm -m
/opt/local/libexec/llvm-3.9/lib/clang/3.9.0/lib/darwin/libclang_rt.osx.a | grep
eprint
/opt/local/libexec/llvm-3.9/lib/clang/3.9.0/lib/darwin/libclang_rt.osx.a(eprintf.c.o):
0000000000000000 (__TEXT,__text) private external ___eprintf

~/tmp/bug $ clang-mp-3.9 --version
clang version 3.9.0 (branches/release_39 277311)
Target: x86_64-apple-darwin16.0.0
Thread model: posix
InstalledDir: /opt/local/libexec/llvm-3.9/bin

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