[cfe-dev] direct machine code generation for arm target

[Eli Friedman]

On Tue, Sep 6, 2011 at 7:33 PM, reed kotler <rkotler at mips.com> wrote:
> Does anybody know the right incantation for having clang generate arm
> machine code without the
> need for gas or some other external assembler? I'm not concerned with
> the particular variant.

"-integrated-as" should work.

-Eli

> buntu-rkotler:~/test> ~/build_llvm_assembler/install/bin/clang hello.c
> -ccc-host-triple arm-unknown-linux -ccc-clang-archs arm -c
> clang: warning: unknown platform, assuming -mfloat-abi=soft
> hello.c:4:3: warning: implicitly declaring C library function 'printf'
> with type
>       'int (const char *, ...)'
>   printf("hello\n");
>   ^
> hello.c:4:3: note: please include the header <stdio.h> or explicitly
> provide a
>       declaration for 'printf'
> 1 warning generated.
> /tmp/hello-81a3aS.s: Assembler messages:
> /tmp/hello-81a3aS.s:1: Error: unknown pseudo-op: `.syntax'
> /tmp/hello-81a3aS.s:2: Error: unknown pseudo-op: `.eabi_attribute'
> /tmp/hello-81a3aS.s:3: Error: unknown pseudo-op: `.eabi_attribute'
> /tmp/hello-81a3aS.s:4: Error: unknown pseudo-op: `.eabi_attribute'
> /tmp/hello-81a3aS.s:5: Error: unknown pseudo-op: `.eabi_attribute'
> /tmp/hello-81a3aS.s:6: Error: unknown pseudo-op: `.eabi_attribute'
> /tmp/hello-81a3aS.s:13: Error: invalid character '{' before operand 1
> /tmp/hello-81a3aS.s:14: Error: too many memory references for `mov'
> /tmp/hello-81a3aS.s:15: Error: too many memory references for `sub'
> /tmp/hello-81a3aS.s:16: Error: expecting operand after ','; got nothing
> /tmp/hello-81a3aS.s:17: Error: invalid char '[' beginning operand 2 `[sp'
> /tmp/hello-81a3aS.s:18: Error: no such instruction: `ldr r0,.LCPI0_0'
> /tmp/hello-81a3aS.s:19: Error: no such instruction: `bl printf'
> /tmp/hello-81a3aS.s:20: Error: no such instruction: `ldr r1,[sp,'
> /tmp/hello-81a3aS.s:21: Error: invalid char '[' beginning operand 2 `[sp]'
> /tmp/hello-81a3aS.s:22: Error: too many memory references for `mov'
> /tmp/hello-81a3aS.s:23: Error: too many memory references for `mov'
> /tmp/hello-81a3aS.s:24: Error: invalid character '{' before operand 1
> /tmp/hello-81a3aS.s:25: Error: no such instruction: `bx lr'
> clang: error: assembler command failed with exit code 1 (use -v to see
> invocation)
>
> thanks.
>
> reed
>
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