From: Klemens Nanni <kn@openbsd.org>
Subject: Re: [Re: mips64 bulk build report] unbreak devel/boost on octeon
To: Visa Hankala <visa@hankala.org>
Cc: ports@openbsd.org, Brad Smith <brad@comstyle.com>
Date: Thu, 02 Apr 2026 16:29:38 +0000

02.04.2026 17:04, Visa Hankala пишет:
> On Thu, Jan 22, 2026 at 03:35:41PM +0000, Klemens Nanni wrote:
>> 22.01.2026 17:26, Jeremie Courreges-Anglas пишет:
>>> boost publically exposes C++ libs with ABI details encoded.  That
>>> doesn't work very well when mixing compilers.
>>
>> Right.
>>
>>> I suspect that passing
>>> -mlong-calls to the b2 compilation (do-configure) should be enough,
>>> but I'm not sure how to do that.
>>
>> build.sh accepts flags, but then:
>>
>> |clang++: warning: ignoring '-mlong-calls' option as it is not currently supported with the implicit usage of -mabicalls [-Woption-ignored]
>>
>> ... second attempt, diff below:
>>
>> |> clang++ -x c++ -std=c++11 -pthread -mlong-calls -mno-abicalls -Wno-deprecated-declarations -DNDEBUG bindjam.cpp [...] -o b2
>> |fatal error: error in backend: Cannot select: 0x45fc4c9a0: i64 = MipsISD::GPRel TargetGlobalAddress:i64<ptr @.str> 0 [TF=3]
>> |  0x442ad8ee0: i64 = TargetGlobalAddress<ptr @.str> 0 [TF=3]
>> |In function: _ZN2b23jam6to_jamIbEEPNS_5valueET_
>> |[...]
>>
>> Index: Makefile
>> ===================================================================
>> RCS file: /cvs/ports/devel/boost/Makefile,v
>> diff -u -p -r1.157 Makefile
>> --- Makefile	15 Jan 2026 15:00:58 -0000	1.157
>> +++ Makefile	22 Jan 2026 15:30:46 -0000
>> @@ -90,13 +90,15 @@ LIB_DEPENDS=	archivers/bzip2 \
>>  
>>  LIB_DEPENDS-md=	devel/boost
>>  
>> +BUILD_SH_ARGS=	# empty
>> +.if ${MACHINE_ARCH} == "mips64"
>> +# XXX bindjam.cpp:(.text+0x600): relocation truncated to fit: R_MIPS_CALL16 ...
>> +BUILD_SH_ARGS+=	--cxxflags='-mlong-calls -mno-abicalls'
>> +.endif
>> +
>>  .include <bsd.port.arch.mk>
>>  
>> -.if ${PROPERTIES:Mclang}
>> -TOOLSET=	clang
>> -.else
>> -TOOLSET=	gcc
>> -.endif
>> +TOOLSET=	${CHOSEN_COMPILER:base-%=:ports-%=}
>>  
>>  BJAM_CONFIG=	-sICU_PATH=${LOCALBASE} \
>>  		-sBZIP2_INCLUDE=${LOCALBASE}/include \
>> @@ -138,7 +140,7 @@ do-configure:
>>  	@cd ${WRKSRC}/libs/config && \
>>  		${SETENV} ${CONFIGURE_ENV} /bin/sh ./configure
>>  	@cd ${WRKSRC}/tools/build/src/engine && ${SETENV} ${CONFIGURE_ENV} \
>> -		/bin/sh ./build.sh ${TOOLSET} && cp b2 ${WRKSRC}
>> +		/bin/sh ./build.sh ${BUILD_SH_ARGS} ${TOOLSET} && cp b2 ${WRKSRC}
>>  	@cd ${WRKSRC} && ${SETENV} ${CONFIGURE_ENV} /bin/sh ./bootstrap.sh ${BOOTSTRAP}
>>  
>>  do-build:
>>
> 
> The "relocation truncated to fit: R_MIPS_CALL16" error says that the
> GOT has become too large for R_MIPS_CALL16. This size limitation can
> be avoided by compiling the calling code with -mxgot (this causes
> a slight performance drop in the resulting machine code).
> 
> Here is a revised patch to fix the mips64 build:

Thanks!

OK kn

> 
> Index: Makefile
> ===================================================================
> RCS file: ports/devel/boost/Makefile,v
> diff -u -p -r1.160 Makefile
> --- Makefile	10 Feb 2026 13:44:09 -0000	1.160
> +++ Makefile	2 Apr 2026 13:48:56 -0000
> @@ -89,6 +89,11 @@ LIB_DEPENDS=	archivers/bzip2 \
>  
>  LIB_DEPENDS-md=	devel/boost
>  
> +BUILD_SH_ARGS=
> +.if ${MACHINE_ARCH} == "mips64" || ${MACHINE_ARCH} == "mips64el"
> +BUILD_SH_ARGS+=	--cxxflags='-mxgot'
> +.endif
> +
>  .include <bsd.port.arch.mk>
>  
>  .if ${PROPERTIES:Mclang}
> @@ -137,7 +142,7 @@ do-configure:
>  	@cd ${WRKSRC}/libs/config && \
>  		${SETENV} ${CONFIGURE_ENV} /bin/sh ./configure
>  	@cd ${WRKSRC}/tools/build/src/engine && ${SETENV} ${CONFIGURE_ENV} \
> -		/bin/sh ./build.sh ${TOOLSET} && cp b2 ${WRKSRC}
> +		/bin/sh ./build.sh ${BUILD_SH_ARGS} ${TOOLSET} && cp b2 ${WRKSRC}
>  	@cd ${WRKSRC} && ${SETENV} ${CONFIGURE_ENV} /bin/sh ./bootstrap.sh ${BOOTSTRAP}
>  
>  do-build:
>