[LLVMbugs] [Bug 18689] New: Assembly options not recognized when using integrated assembler

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18689

            Bug ID: 18689
           Summary: Assembly options not recognized when using integrated
                    assembler
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: ARM
          Assignee: unassignedbugs at nondot.org
          Reporter: renato.golin at linaro.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

While compiling the Linux kernel with the IAS, we get this two parameter
errors:

/llvmlinux/toolchain/clang/install/bin/clang -gcc-toolchain \
 /llvmlinux/arch/arm/toolchain/codesourcery/arm-2013.05 \
 -Wp,-MD,arch/arm/vfp/.vfphw.o.d  -nostdinc -isystem \
 /llvmlinux/toolchain/clang/install/bin/../lib/clang/3.5/include \
 -I/llvmlinux/targets/vexpress/src/linux/arch/arm/include \
 -Iarch/arm/include/generated  -Iinclude \
 -I/llvmlinux/targets/vexpress/src/linux/arch/arm/include/uapi \
 -Iarch/arm/include/generated/uapi \
 -I/llvmlinux/targets/vexpress/src/linux/include/uapi -Iinclude/generated/uapi
\
 -include /llvmlinux/targets/vexpress/src/linux/include/linux/kconfig.h \
 -D__KERNEL__ -target arm-none-linux-gnueabi  -Qunused-arguments \
 -Wno-unknown-warning-option  -D__ASSEMBLY__ -integrated-as -mfpu=vfp \
 -funwind-tables -marm -D__LINUX_ARM_ARCH__=7 -march=armv7-a \
 -include asm/unified.h -Wa,-mfpu=softvfp+vfp -mfloat-abi=soft -Wa,--gdwarf-2 \
 -c -o arch/arm/vfp/vfphw.o arch/arm/vfp/vfphw.S

clang-3.5: error: unsupported argument '-mfpu=softvfp+vfp' to option 'Wa,'
clang-3.5: error: unsupported argument '--gdwarf-2' to option 'Wa,'

The easiest solution would be to add them as alias... But the dwarf2 worries
me, since, AFAIK, we can't guarantee it.

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