[llvm-bugs] [Bug 42528] New: Linker errors after installing/compiling LLVM/CLANG on Xcode

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=42528

            Bug ID: 42528
           Summary: Linker errors after installing/compiling LLVM/CLANG on
                    Xcode
           Product: Build scripts
           Version: trunk
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: joan.lluch at icloud.com
                CC: llvm-bugs at lists.llvm.org

Builds of LLVM+clang fail with linker errors when using Xcode.

The CMAKE command was:

cmake -G Xcode -DCMAKE_INSTALL_PREFIX=/Users/joan/LLVM-9/install
-DLLVM_ENABLE_PROJECTS=clang ../llvm

Command was executed from a newly created "build" directory in the
"llvm-project" directory

"llvm-project" directory was cloned from the gitHub repository using git clone 

While compiling in xCode, the following libraries are reported by the linker to
be missing, (In fact, they are not created anywhere):

clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangAnalysis.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangAST.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangStaticAnalyzerCore.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangStaticAnalyzerFrontend.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangStaticAnalyzerCheckers.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangStaticAnalyzerCore.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangCrossTU.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangIndex.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangFrontend.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangDriver.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangParse.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangSerialization.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangSema.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangAnalysis.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangEdit.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangFormat.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangToolingInclusions.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangToolingCore.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangRewrite.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangASTMatchers.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangAST.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangLex.a'
clang: error: no such file or directory:
'/Users/joan/LLVM-9/llvm-project/build/Debug/lib/libclangBasic.a'

The above missing libraries are not created anywhere but similarly "obj."
prefixed ones are created in several sub-directories deep inside the 'build'
directory. For example, "libobj.clangBasic.a" is created in
'llvm-project/build/tools/clang/lib/Basic/LLVM.build/Debug/obj.clangBasic.build/Objects-normal'.
However "libclangBasic.a" is not created anywhere, which makes the linker to
fail.

Everything under ‘llvm’ directory is properly compiled with no issues, so the
'llc' executable (for instance) can be created just fine. However sources under
‘clang’ directory do not create the required libraries for 'clang'

Thanks in advance for looking into this

John

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