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Date:      Sun, 15 Nov 2020 09:34:13 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 251150] Cannot compile zfsboot: no previous prototype for function 'main' [-Werror,-Wmissing-prototypes]
Message-ID:  <bug-251150-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D251150

            Bug ID: 251150
           Summary: Cannot compile zfsboot: no previous prototype for
                    function 'main' [-Werror,-Wmissing-prototypes]
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: markiyan.kushnir@gmail.com

cc  -O2 -pipe -fno-common   -I/work/src.svn/stand/i386/btx/lib -nostdinc=20=
=20=20
-I/work/obj/work/src.svn/amd64.amd64/stand/libsa32 -I/work/src.svn/stand/li=
bsa
-D_STANDALONE -I/work/src.svn/sys -Ddouble=3Djagged-little-pill
-Dfloat=3Dfloaty-mcfloatface -ffunction-sections -fdata-sections
-DLOADER_GELI_SUPPORT -I/work/src.svn/stand/libsa/geli -DLOADER_DISK_SUPPORT
-m32 -ffreestanding -mno-mmx -mno-sse -mno-avx -mno-avx2 -msoft-float
-march=3Di386 -mno-relax -I. -Iinclude -DBOOTPROG=3D\"zfsboot\"  -O1  -DBOO=
T2=20
-DLOADER_GPT_SUPPORT  -DLOADER_MBR_SUPPORT  -DLOADER_ZFS_SUPPORT=20
-DLOADER_UFS_SUPPORT  -DSIOPRT=3D0x3f8  -DSIOFMT=3D0x3  -DSIOSPD=3D9600=20
-I/work/src.svn/stand/common  -I/work/src.svn/stand/i386/common=20
-I/work/src.svn/stand/i386/libi386  -I/work/src.svn/stand/libsa/zfs=20
-I/work/src.svn/sys/crypto/skein  -I/work/src.svn/sys/cddl/boot/zfs=20
-I/work/src.svn/sys/contrib/openzfs/include=20
-I/work/src.svn/sys/contrib/openzfs/include/os/freebsd/spl=20
-I/work/src.svn/sys/contrib/openzfs/include/os/freebsd/zfs=20
-I/work/src.svn/sys/cddl/contrib/opensolaris/common/lz4=20
-I/work/src.svn/stand/i386/boot2  -Wall -Waggregate-return -Wbad-function-c=
ast
-Wno-cast-align  -Wmissing-declarations -Wmissing-prototypes -Wnested-exter=
ns=20
-Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings -g -MD=20
-MF.depend.zfsboot.o -MTzfsboot.o -std=3Dgnu99 -Wno-format-zero-length
-nobuiltininc -idirafter /usr/lib/clang/9.0.1/include -Wsystem-headers -Wer=
ror
-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 /work/src.svn/stand/i386/zfsboot/zfsboot.c -o
zfsboot.o
/work/src.svn/stand/i386/zfsboot/zfsboot.c:165:1: error: no previous protot=
ype
for function 'main' [-Werror,-Wmissing-prototypes]
main(void)
^
/work/src.svn/stand/i386/zfsboot/zfsboot.c:164:1: note: declare 'static' if=
 the
function is not intended to be used outside of this translation unit
int
^
static
1 error generated.
*** Error code 1

Stop.
make: stopped in /work/src.svn/stand/i386/zfsboot


I'd suggest to add the main() declaration much like it's in gptboot.

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