Re: NanoBSD: CURRENT unable to compile 13-STABLE : ld: error: args.o: Opaque pointers are only supported in -opaque-pointers mode (Producer: 'LLVM15.0.7' Reader: 'LLVM 14.0.5')

On 3/30/23, Mateusz Guzik <mjguzik@gmail.com> wrote:
> On 3/30/23, FreeBSD User <freebsd@walstatt-de.de> wrote:
>> Hello folks,
>>
>> some strange misbehaviour in a NanoBSD compilation is driving me nuts.
>> Recently I posted some
>> error messages regarding
>>
>> [...]
>> src/sys/dev/an/if_an_pci.c:143:1: error: a
>> function definition without a prototype is deprecated in all versions of
>> C
>> and is not
>> supported in C2x [-Werror,-Wdeprecated-non-prototype]
>> [...]
>>
>> but being able compiling the kernel was "a lucky shot/mistake" and in the
>> vain of discussion
>> it has been revealed that my nanoBSD specific "make.conf/src.conf"
>> configurations were wrong.
>>
>> So, again:
>>
>> The builder host is a recent CURRENT (FreeBSD 14.0-CURRENT #2
>> main-n261876-f5a365e51fee: Thu
>> Mar 30 11:23:19 CEST 2023 amd64), the target is a most recent 13-STABLE
>> (git
>> pull on a
>> daily/hourly/most recentl basis when trying to build).
>>
>> As I understand the src/buildworld config, it seems crucial to have
>> CURRENT
>> and 13-STABLE
>> somehow separated due to their divergende in used LLVM/CLANG (CURRENT has
>> LLVM 15, 13-STABLE
>> is with LLVM 14).
>>
>> Putting
>>
>> WITHOUT_SYSTEM_COMPILER=YES
>> WITHOUT_SYSTEM_LINKER=YES
>>
>> into CONF_BUILD= AND CONF_WORLD= of NanoBSD configuration should prevent
>> the
>> usage of
>> CURRENT's LLVM 15 and instead a cross compiling with 13-STABLE's LLVM 14
>> compiler and linker
>> should be used to buildworld.
>>
>> But this doesn't seem to happen (at least in my case), since buildworld
>> fails to build with:
>>
>> [...]
>> cc -target x86_64-unknown-freebsd13.2
>> --sysroot=/pool/home/ohartmann/Projects/router/router/apu2c4/world/obj/amd64/ALERICH_13-STABLE_amd64/pool/home/ohartmann/Projects/router/router/apu2c4/src/amd64.amd64/tmp
>> -B/pool/home/ohartmann/Projects/router/router/apu2c4/world/obj/amd64/ALERICH_13-STABLE_amd64/pool/home/ohartmann/Projects/router/router/apu2c4/src/amd64.amd64/tmp/usr/bin
>> -O2 -pipe -fno-common -DMAINEXEC=bc -DNLSPATH=/usr/share/nls/%L/%N.cat
>> -DBUILD_TYPE=A
>> -DBC_DEFAULT_BANNER=0 -DBC_DEFAULT_PROMPT=0 -DBC_DEFAULT_SIGINT_RESET
>> -DBC_DEFAULT_TTY_MODE
>> -DBC_ENABLED -DBC_ENABLE_EDITLINE -DBC_ENABLE_EXTRA_MATH
>> -DBC_ENABLE_LIBRARY=0
>> -DBC_ENABLE_LONG_OPTIONS -DBC_ENABLE_HISTORY -DBC_ENABLE_PROMPT
>> -DBC_ENABLE_RAND
>> -DDC_DEFAULT_PROMPT=0 -DDC_DEFAULT_SIGINT_RESET -DDC_DEFAULT_TTY_MODE=0
>> -DDC_ENABLED -DNDEBUG
>> -I/pool/home/ohartmann/Projects/router/router/apu2c4/src/contrib/bc/include
>> -DBC_ENABLE_NLS=1
>> -flto -DNDEBUG -fPIE -mretpoline -ftrivial-auto-var-init=zero
>> -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang
>> -std=gnu99
>> -Wno-format-zero-length -fstack-protector-strong -Wsystem-headers -Wall
>> -Wno-format-y2k -W
>> -Wno-unused-parameter -Wstrict-prototypes -Wmissing-prototypes
>> -Wpointer-arith -Wreturn-type
>> -Wcast-qual -Wwrite-strings -Wswitch -Wshadow -Wunused-parameter
>> -Wcast-align
>> -Wchar-subscripts -Wnested-externs -Wold-style-definition
>> -Wno-pointer-sign
>> -Wmissing-variable-declarations -Wthread-safety -Wno-empty-body
>> -Wno-string-plus-int
>> -Wno-unused-const-variable -Wno-error=unused-but-set-variable
>> -Qunused-arguments  -Wl,-zrelro
>> -pie -Wl,-zretpolineplt   -o gh-bc args.o bc.o bc_lex.o bc_parse.o data.o
>> dc.o dc_lex.o
>> dc_parse.o file.o history.o lang.o lex.o main.o num.o opt.o parse.o
>> program.o rand.o read.o
>> vector.o vm.o bc_help.o dc_help.o lib.o lib2.o   -ledit ld: error:
>> args.o:
>> Opaque pointers are
>> only supported in -opaque-pointers mode (Producer: 'LLVM15.0.7' Reader:
>> 'LLVM 14.0.5') cc:
>> error: linker command failed with exit code 1 (use -v to see invocation)
>> ***
>> [gh-bc] Error
>> code 1
>>
>> make[5]: stopped in
>> /pool/home/ohartmann/Projects/router/router/apu2c4/src/usr.bin/gh-bc
>> [...]
>>
>>
>> I'm now out of options here :-(
>>
>
> are you even using the dev/an driver?
>
> you should probably just remove it from the kernel (and any other
> driver of the sort)
>
> ultimately you should be able to stick to the compiler from main. in
> the worst case the commit to turn "function definition without a
> prototype is deprecated" from errors to warnings could be merged to
> stable/13 to facilitate the build
>
> it may be you will be able to get away with modifying CFLAGS like so:
> CFLAGS+=-Wno-deprecated-non-prototype
>
> in src.conf and/or make.conf
>

So I looked into it and landed
https://cgit.FreeBSD.org/src/commit/?id=82eb549f800e08158802b74bef62e7db0939a3fe

As of that commit I can both buildworld and buildkernel a stable/13
tree while running main, without any magic to change compilers.

-- 
Mateusz Guzik <mjguzik gmail.com>