[llvm-bugs] [Bug 49120] New: clang/lib/Driver/Distro.cpp should look at target triplet

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49120

            Bug ID: 49120
           Summary: clang/lib/Driver/Distro.cpp should look at target
                    triplet
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: -New Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: bero at lindev.ch
                CC: htmldeveloper at gmail.com, llvm-bugs at lists.llvm.org,
                    neeilans at live.com, richard-llvm at metafoo.co.uk

Currently, clang/lib/Driver/Distro.cpp looks at the host system to determine
what distro it is targeting.

Given the way this information is used (e.g. --hash-style=gnu vs.
--hash-style=sysv vs. --hash-style=both in
clang/lib/Driver/ToolChains/Linux.cpp), it would make more sense to look at the
target triplet.

e.g. ToolChains/Linux.cpp says Redhat should use --hash-style=gnu and Debian
should use --hash-style=both. In the current situation, someone running
clang -target x86_64-debian-linux-gnu test.c
on an x86_64-redhat-linux-gnu box (essentially trying to crosscompile to
something very similar) will get --hash-style=gnu while the target system would
expect a binary to be built with --hash-style=both

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