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List:       freebsd-ppc
Subject:    Re: -mllvm -disable-ppc-float-in-variadic=true not recognized by clang 3.8.0; used in kern.mk for TA
From:       Roman Divacky <rdivacky () vlakno ! cz>
Date:       2016-01-19 12:11:23
Message-ID: 20160119121123.GA15094 () vlakno ! cz
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clang 3.8 support soft-float on PPC natively, no need for the 
-mllvm -disable-ppc-float-in-variadic=true hack anymore.

Roman

On Fri, Jan 15, 2016 at 11:07:59PM -0800, Mark Millard wrote:
> 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
> 
> _______________________________________________
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