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

[Sebastian Huber]

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
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber at embedded-brains.de
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