On Mon, Sep 14, 2020 at 06:46:52PM +0200, Dimitry Andric wrote: > On 13 Sep 2020, at 20:56, Dimitry Andric <d...@freebsd.org> wrote: > > > > On 12 Sep 2020, at 23:00, Ronald Klop <ronald-li...@klop.ws> wrote: > >> > >> On Sat, 12 Sep 2020 18:28:03 +0200, Dimitry Andric <d...@freebsd.org> > >> wrote: > >>> On 12 Sep 2020, at 17:43, Ronald Klop <ronald-li...@klop.ws> wrote: > >>>> > >>>> Because I'm tired of hours of compilation of llvm/clang I'm testing > >>>> compiling FreeBSD with llvm11 from a pkg. > > ... > > It is during the building world stage and happens with and without NO_CLEAN. > >> Full command: > >> /usr/local/bin/clang11 -O2 -pipe -fno-common -DNO__SCCSID -DNO__RCSID > >> -I/usr/src/lib/libc > >> /include -I/usr/src/include -I/usr/src/lib/libc/amd64 -DNLS > >> -D__DBINTERFACE_PRIVATE -I/usr/ > >> src/contrib/gdtoa -I/usr/src/contrib/libc-vis -DINET6 > >> -I/usr/obj/usr/src/amd64.amd64/lib/lib > >> c -I/usr/src/lib/libc/resolv -D_ACL_PRIVATE -DPOSIX_MISTAKE > >> -I/usr/src/lib/libmd -I/usr/src/ > >> contrib/jemalloc/include -DMALLOC_PRODUCTION > >> -I/usr/src/contrib/tzcode/stdtime -I/usr/src/li > >> b/libc/stdtime -I/usr/src/lib/libc/locale -DBROKEN_DES -DPORTMAP > >> -DDES_BUILTIN -I/usr/src/li > >> b/libc/rpc -DWANT_HYPERV -DYP -DNS_CACHING -DSYMBOL_VERSIONING -g -MD > >> -MF.depend.shm_open.o > >> -MTshm_open.o -std=gnu99 -Wno-format-zero-length -nobuiltininc -idirafter > >> /usr/local/llvm11 > >> /lib/clang/11.0.0/include -fstack-protector-strong -Wsystem-headers > >> -Werror -Wall -Wno-format-y2k -Wno-uninitialized -Wno-pointer-sign > >> -Wno-empty-body -Wno-string-plus-int -Wno-unused- > >> const-variable -Wno-tautological-compare -Wno-unused-value > >> -Wno-parentheses-equality -Wno-un > >> used-function -Wno-enum-conversion -Wno-unused-local-typedef > >> -Wno-address-of-packed-member - > >> Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter > >> -Qunused-arguments -I/usr/src/lib/libutil -I/usr/src/lib/msun/amd64 > >> -I/usr/src/lib/msun/x86 -I/usr/src/lib/msun/src -c /usr/ > >> src/lib/libc/sys/shm_open.c -o shm_open.o > > > > After a pretty long build of the llvm11 port, I can at least reproduce your > > error. It looks like the problem is that clang11 does not get any --sysroot > > parameter passed. > ... > > So except for the expected difference in the -idirafter option that points > > to the clang internal headers, the main problem is that for some reason, > > clang11 does not get the -target and --sysroot options passed. > > In the end it turns out that the problems is caused by setting CC (and CXX, > etc) in make.conf. This has the unfortunate side-effect that any XCFLAGS are > overridden during the world stages, such that the all-important --sysroot > flags is not added. > > In short, never set CC, CXX, CPP or LD in your make.conf or build > environment, but use XCC, XCXX, XCPP and XLD instead. Better yet, install one > of the llvm packages from the devel category, and set CROSS_TOOLCHAIN. > > Keep an eye on https://wiki.freebsd.org/ExternalToolchain, which still has a > little bit of outdated information, but is hopefully going to be updated soon.
I've made some modest updates to this page to reflect building with modern LLVM ports. -- Brooks
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