[llvm-bugs] [Bug 51013] New: clang handles system librabry paths before LIBRARY_PATH

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=51013

            Bug ID: 51013
           Summary: clang handles system librabry paths before
                    LIBRARY_PATH
           Product: clang
           Version: 11.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: marius.messerschmidt at googlemail.com
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

When I try to link to a library that exists in both /usr/lib/ and a custom
location specified in the LIBRARY_PATH environment variable, clang always
chooses the system library (which causes linker errors as the system version is
to old and the headers from C_INCLUDE_PATH where choosen).

Other librabries, that do not exist in the system directories are found from
LIBRARY_PATH.

When building with GCC, the entries in LIBRARY_PATH are prefered over the
system libraries.

This is possibly related to https://bugs.llvm.org/show_bug.cgi?id=23877, but
the linker-step is affected as well.

I have also seen this bug report https://bugs.llvm.org/show_bug.cgi?id=16786
which seems to be fixed. However the issue does also happen with a custom-build
"clang 11.1.0"

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