[llvm-bugs] [Bug 34024] New: CMAKE_EXE_LINKER_FLAGS is used in the compiler-rt feature checks

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=34024

            Bug ID: 34024
           Summary: CMAKE_EXE_LINKER_FLAGS is used in the compiler-rt
                    feature checks
           Product: Build scripts
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: rafael.espindola at gmail.com
                CC: filcab at gmail.com, llvm-bugs at lists.llvm.org

This means that one cannot build llvm programs static by adding -static to
CMAKE_EXE_LINKER_FLAGS.

The issue is that the various check_library_exists will try to link and
executable and fail with undefined references to _Unwind* because libgcc_eh.a
is not being linked in.

The test is incorrect. We are trying to build a *library*, we should not be
using CMAKE_EXE_LINKER_FLAGS.

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