[llvm-bugs] [Bug 48807] New: lld-link module definition file reserved keywords are fatal errors but should be ignored

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=48807

            Bug ID: 48807
           Summary: lld-link module definition file reserved keywords are
                    fatal errors but should be ignored
           Product: lld
           Version: unspecified
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: COFF
          Assignee: unassignedbugs at nondot.org
          Reporter: brian at dbsoft.org
                CC: llvm-bugs at lists.llvm.org

I write cross platform software and use the same module definition files on
both OS/2 and Windows. 

This is possible because the linkers on OS/2 and Windows ignore keywords that
do not apply to the specific platform:

https://docs.microsoft.com/en-us/cpp/build/reference/reserved-words?view=msvc-160

Keywords such as WINDOWAPI which defines a graphical application on OS/2 and
possibly Windows or DESCRIPTION which adds a text description of the
application. 

link.exe produces a warning such as this when encountering these keywords:

handyftp.def(3) : warning LNK4017: DESCRIPTION statement not supported for the
target platform; ignored

When lld-link.exe encounters these keywords it gives fatal errors such as:

lld-link: error: unknown directive: WINDOWAPI

or

lld-link: error: unknown directive: DESCRIPTION

The behavior for these keywords should be either silent ignore or warning, but
ignore... this is the example handyftp.def that works on both OS/2 and Windows
with other linkers:

NAME HANDYFTP WINDOWAPI

DESCRIPTION 'Handy FTP'

STACKSIZE 128000

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