[llvm-bugs] [Bug 26838] New: clang option -mabi (and -cc1 -meabi) has no effect when cross-compiling to ARM

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=26838

            Bug ID: 26838
           Summary: clang option -mabi (and -cc1 -meabi) has no effect
                    when cross-compiling to ARM
           Product: clang
           Version: 3.8
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Frontend
          Assignee: unassignedclangbugs at nondot.org
          Reporter: david.cab+llvmbug at gmail.com
                CC: llvm-bugs at lists.llvm.org
    Classification: Unclassified

It is impossible to compile an arm binary with an EABI other than EABI 5.


Steps to reproduce:

  touch main.c
  clang  -target arm---elf -mabi=apcs-gnu -msoft-float -c main.c

Other options include:

  clang -cc1 -triple arm -meabi gnu -target-abi apcs-gnu -emit-obj main.c

  clang -cc1 -triple arm -meabi gnu -emit-obj main.c

  clang -cc1 -triple arm -meabi 4 -emit-obj main.c


Actual Results: 

An EABI5 object is created. "file main.o" results in

  main.o: ELF 32-bit LSB relocatable, ARM, EABI5 version 1 (SYSV), not stripped

Expected Results:

An object file with the appropriate EABI (other than 5) should have been
generated.

Build Date & Platform:

   Tested with Clang 3.7.1 and Clang 3.8.0-rc3 precompiled binaries for Ubuntu
15.10 x86_64 available at llvm.org.

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