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Date:      Sun, 15 Nov 2020 14:15:37 +0200
From:      Markiyan Kushnir <markiyan.kushnir@gmail.com>
To:        bugzilla-noreply@freebsd.org
Cc:        bugs@freebsd.org
Subject:   Re: [Bug 251150] Cannot compile zfsboot: no previous prototype for function 'main' [-Werror,-Wmissing-prototypes]
Message-ID:  <CACvtUJfup7Ms9BROE-n2Uog6%2B1-49_f_uWNLPtbPFwNa8TOm6A@mail.gmail.com>
In-Reply-To: <bug-251150-227-Rek2IxsQx6@https.bugs.freebsd.org/bugzilla/>
References:  <bug-251150-227@https.bugs.freebsd.org/bugzilla/> <bug-251150-227-Rek2IxsQx6@https.bugs.freebsd.org/bugzilla/>

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I compiled it with a clang dating before Mar 2020.


--
Markiyan.

2020-11-15 13:41 GMT+02:00, bugzilla-noreply@freebsd.org
<bugzilla-noreply@freebsd.org>:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251150
>
> --- Comment #3 from Toomas Soome <tsoome@freebsd.org> ---
> what compiler do you have? because I do not get this error:
>
> root@freebsd-2:/usr/src/stand/i386/zfsboot # make
> cc  -O2 -pipe -fno-common   -I/usr/src/stand/i386/btx/lib -nostdinc
> -I/usr/obj/usr/src/amd64.amd64/stand/libsa32 -I/usr/src/stand/libsa
> -D_STANDALONE -I/usr/src/sys -Ddouble=jagged-little-pill
> -Dfloat=floaty-mcfloatface -ffunction-sections -fdata-sections
> -DLOADER_GELI_SUPPORT -I/usr/src/stand/libsa/geli -DLOADER_DISK_SUPPORT
> -m32
> -ffreestanding -mno-mmx -mno-sse -mno-avx -mno-avx2 -msoft-float
> -march=i386
> -mno-relax -I. -Iinclude -DBOOTPROG=\"zfsboot\"  -O1  -DBOOT2
> -DLOADER_GPT_SUPPORT  -DLOADER_MBR_SUPPORT  -DLOADER_ZFS_SUPPORT
> -DLOADER_UFS_SUPPORT  -DSIOPRT=0x3f8  -DSIOFMT=0x3  -DSIOSPD=9600
> -I/usr/src/stand/common  -I/usr/src/stand/i386/common
> -I/usr/src/stand/i386/libi386  -I/usr/src/stand/libsa/zfs
> -I/usr/src/sys/crypto/skein  -I/usr/src/sys/cddl/boot/zfs
> -I/usr/src/sys/contrib/openzfs/include
> -I/usr/src/sys/contrib/openzfs/include/os/freebsd/spl
> -I/usr/src/sys/contrib/openzfs/include/os/freebsd/zfs
> -I/usr/src/sys/cddl/contrib/opensolaris/common/lz4
> -I/usr/src/stand/i386/boot2
>  -Wall -Waggregate-return -Wbad-function-cast -Wno-cast-align
> -Wmissing-declarations -Wmissing-prototypes -Wnested-externs
> -Wpointer-arith
> -Wshadow -Wstrict-prototypes -Wwrite-strings -g -MD  -MF.depend.zfsboot.o
> -MTzfsboot.o -std=gnu99 -Wno-format-zero-length -Wsystem-headers -Werror
> -Wno-pointer-sign -Wno-empty-body -Wno-string-plus-int
> -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value
> -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
> -Wno-unused-local-typedef -Wno-address-of-packed-member -Wno-switch
> -Wno-switch-enum -Wno-knr-promoted-parameter -Wno-parentheses  -Oz
> -Qunused-arguments    -c /usr/src/stand/i386/zfsboot/zfsboot.c -o zfsboot.o
> ld -m elf_i386_fbsd -static -N --gc-sections --defsym ORG=0x2000 -T
> /usr/src/stand/i386/boot.ldscript -o zfsboot.out
> /usr/obj/usr/src/amd64.amd64/stand/i386/btx/lib/crt0.o zfsboot.o sio.o
> cons.o
> bcache.o devopen.o disk.o part.o zfs_cmd.o
> /usr/obj/usr/src/amd64.amd64/stand/i386/libi386/libi386.a
> /usr/obj/usr/src/amd64.amd64/stand/libsa32/libsa32.a
> objcopy -S -O binary zfsboot.out zfsboot.bin
> btxld -v -E 0x2000 -f bin -b
> /usr/obj/usr/src/amd64.amd64/stand/i386/btx/btx/btx -l zfsboot.ldr  -o
> zfsboot.ld -P 1 zfsboot.bin
> kernel: ver=1.02 size=6b0 load=9000 entry=9010 map=16M pgctl=1:1
> client: fmt=bin size=27f84 text=0 data=0 bss=0 entry=0
> output: fmt=bin size=28634 text=0 data=28634 org=0 entry=0
> 96716 bytes available
> dd status=none if=zfsboot.ld of=zfsboot2 bs=262144 conv=sync
> cat zfsboot1 zfsboot2 > zfsboot
> root@freebsd-2:/usr/src/stand/i386/zfsboot # cc -v
> FreeBSD clang version 11.0.0 (git@github.com:llvm/llvm-project.git
> llvmorg-11.0.0-rc5-0-g60a25202a7d)
> Target: x86_64-unknown-freebsd13.0
> Thread model: posix
> InstalledDir: /usr/bin
> root@freebsd-2:/usr/src/stand/i386/zfsboot #
>
> Of course we can add this prototype, but I'd like to understand why you
> have
> this error and I do not.
>
> --
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