RFC: Building RTEMS/RISC-V with LLVM/Clang

[Hesham Almatary]

Hi Sebastian,

The *_clang ones aren't expected to be compiled by GCC (and the native
*.cfg won't compile with clang). Is there a reason they should be?




On Mon, 28 Oct 2019 at 07:42, Sebastian Huber
<sebastian.huber at embedded-brains.de> wrote:
>
> Hello,
>
> when you build the new clang variants with GCC you get:
>
> gmake[3]: Leaving directory
> '/build/git-build/b-all-riscv-5/riscv-rtems5/c/rv32i_clang'
> checking for RTEMS_CPU_MODEL...
> checking for RTEMS_BSP_FAMILY... riscv
> checking for CPU_CFLAGS... (cached) -march=rv32i -mabi=ilp32 -target
> riscv32-unknown-rtems6 --sysroot=
> checking for CFLAGS_OPTIMIZE_V... (cached) -O0 -g -ffunction-sections
> -fdata-sections
> checking for style of include used by gmake... GNU
> checking for riscv-rtems5-gcc... riscv-rtems5-gcc
> checking for riscv-rtems5-gcc... (cached) riscv-rtems5-gcc
> checking whether the C compiler works... no
> configure: error: in
> `/build/git-build/b-all-riscv-5/riscv-rtems5/c/rv32i_clang':
> configure: error: C compiler cannot create executables
> See `config.log' for more details
>
> Would it be possible to avoid the *_clang.cfg variants and use some
> logic on configure.ac to adjust the flags?
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
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> E-Mail  : sebastian.huber at embedded-brains.de
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>
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