FreeBSD 9 buildworld with clang failure

[illoai at gmail.com]

On 2 February 2012 14:43, Dean E. Weimer <dweimer at dweimer.net> wrote:
> I am trying to rebuild everything in a development machine with clang to
> test for production, and ran into a problem on the buildworld process.  This
> machine was already rebuilt from source using gcc, here are the options I
> have set in make.conf and src.conf.  The lines I added to enable clang, and
> the steps I took to compile.
>
> Options in /etc/src.conf
> WITHOUT_BIND_DNSSEC="YES"
> WITHOUT_BIND_LIBS_LWRES="YES"
> WITHOUT_BIND_NAMED="YES"
> WITHOUT_BIND_UTILS="YES"
> WITHOUT_NTP="YES"
> WITHOUT_PROFILE="YES"
>
> Options already in /etc/make.conf
> WITH_OPENSSL_PORT=yes
> WITHOUT_X11=yes
> CFLAGS= -O -pipe
> PERL_VERSION=5.12.4
>
> Added to /etc/make.conf
> .if !defined(USE_GCC)
> .if !defined(CC) || ${CC} == "cc"
> CC=clang
> .endif
> .if !defined(CXX) || ${CXX} == "c++"
> CXX=clang++
> .endif
> .if !defined(CPP) || ${CPP} == "cpp"
> CPP=clang-cpp
> .endif
> .endif
>
>
> Did the cleanup process from previous build and currently installed setup.
> chflags -R noschg /usr/obj/usr
> rm -rf /usr/obj/usr
> cd /usr/src
> make cleandir
> make cleandir
>
> Then ran make buildworld, it died on libc with the following output:
>
> ===> lib/libc (obj,depend,all,install)
> clang -O -pipe  -I/usr/src/lib/libc/include
> -I/usr/src/lib/libc/../../include -I/usr/src/lib/libc/amd64 -DNLS
>  -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../contrib/gdtoa -DINET6
> -I/usr/obj/usr/src/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE
> -DPOSIX_MISTAKE -I/usr/src/lib/libc/../../contrib/tzcode/stdtime
> -I/usr/src/lib/libc/stdtime -I/usr/src/lib/libc/locale -DBROKEN_DES
> -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP -DNS_CACHING
> -DSYMBOL_VERSIONING -std=gnu99 -fstack-protector -Wsystem-headers -Werror
> -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign -c
> /usr/src/lib/libc/gen/setjmperr.c
> In file included from /usr/src/lib/libc/gen/setjmperr.c:44:
> /usr/src/lib/libc/../../include/setjmp.h:58:5: error: incompatible
> redeclaration of library function
>      'sigsetjmp' [-Werror]
> int     sigsetjmp(sigjmp_buf, int);
>        ^
> /usr/src/lib/libc/../../include/setjmp.h:58:5: note: 'sigsetjmp' is a
> builtin with type
>      'int (struct _jmp_buf *, int)'
> 1 error generated.
> *** Error code 1
>
> Stop in /usr/src/lib/libc.
> *** Error code 1

Might try:
Commenting out CFLAGS=
Setting NO_WERROR= in /etc/make.conf

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