[PATCH] build: fix invalid characters in toolchain definitions

[Tyler Retzlaff]

On Tue, Feb 07, 2023 at 03:22:00PM +0000, Bruce Richardson wrote:
> When using "icx" (Intel(R) oneAPI DPC++/C++ Compiler) to build DPDK,
> meson reports the toolchain as "intel-llvm"[1]. This value is used
> directly to define the RTE_TOOLCHAIN macros, which means that we end up
> with the invalid macro name "RTE_TOOLCHAIN_INTEL-LLVM", and getting the
> compiler warning:
> 
> ./rte_build_config.h:422:28: warning: ISO C99 requires whitespace after the macro name [-Wc99-extensions]
> 
> This can be fixed, and the macro generation made more robust generally,
> by adding "underscorify()" on the string. This replaces the "-", and
> any other invalid characters, with "_" [2].
> 
> [1] https://mesonbuild.com/Reference-tables.html#compiler-ids
> [2] https://mesonbuild.com/Reference-manual_elementary_str.html#strunderscorify
> 
> Fixes: afd18fa21b5e ("build: set toolchain info during meson configure")
> Cc: stable at dpdk.org
> 
> Reported-by: Keith Wiles <keith.wiles at intel.com>
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>

Acked-by: Tyler Retzlaff <roretzla at linux.microsoft.com>