[llvm-bugs] [Bug 26090] New: autoconf passes LDFLAGS to clang-cl causing it to fail

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26090

            Bug ID: 26090
           Summary: autoconf passes LDFLAGS to clang-cl causing it to fail
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jmuizelaar at mozilla.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

We're running into a problem where configure fails because clang-cl doesn't
accept the LDFLAGS that are passed to it, while cl.exe does. This makes using
clang-cl with autoconf and custom LDFLAGS very difficult.

Since, we don't want to ignore unknown options to clang-cl one option would be
to add a flag something like '-fignore-options=[all the options to be
ignored]". This gives projects using autoconf a way to hack things into
working.

Alternatively, we could modify the default clang-cl behavior to match cl by
accepting unknown arguments, and add a '-fstrict-option-parsing' argument that
rejects unknown options. This allows clang-cl to be a drop-in replacement for
cl while allowing projects that don't need this the option to opt into sane
behaviour.

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