-mllvm -disable-ppc-float-in-variadic=true not recognized by clang 3.8.0; used in kern.mk for TARGET_ARCH=powerpc; more

[Mark Millard]

At least for amd64 clang 3.8.0 -> powerpc via TARGET_ARCH=powerpc buildkernel I get the following clang command line options that stop the build attempt. . .


In sys/conf/kern.mk :

The "CFLAGS.clang+=  -mllvm -disable-ppc-float-in-variadic=true" line in

> .if ${MACHINE_CPUARCH} == "powerpc"
> CFLAGS+=        -mno-altivec
> CFLAGS.clang+=  -mllvm -disable-ppc-float-in-variadic=true
> CFLAGS.gcc+=    -msoft-float
> INLINE_LIMIT?=  15000
> .endif

results in:

> --- genassym.o ---
> clang (LLVM option parsing): Unknown command line argument '-disable-ppc-float-in-variadic=true'.  Try: 'clang (LLVM option parsing) -help'
> clang (LLVM option parsing): Did you mean '-disable-ppc-ctrloop-analysis=true'?


(The above one is the main reason why I's also sending to toolchain: it suggests some sort of change to earlier clang-specific command line options.)


In sys/conf/Makefile.powerpc :

> CFLAGS+= -msoft-float -Wa,-many

results in:

> --- genassym.o ---
> cc: error: unsupported argument '-many' to option 'Wa,'
> *** [genassym.o] Error code 1



In sys/conf/kmod.mk :

> .if ${MACHINE_CPUARCH} == powerpc
> CFLAGS+=        -mlongcall -fno-omit-frame-pointer
> .endif

results in:

> --- depend_subdir_dtrace ---
> cc: error: unknown argument: '-mlongcall'
. . .
> --- depend_subdir_dtrace ---
> *** [genassym.o] Error code 1

(no surprise).


I stopped experimenting with this area after those 3. (They are not listed in the order discovered.)

===
Mark Millard
markmi at dsl-only.net