Date: Sun, 08 Sep 2013 22:18:22 +0200 From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no> To: David Chisnall <theraven@FreeBSD.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, dim@freebsd.org Subject: Re: svn commit: r255321 - in head: contrib/llvm/tools/clang/lib/Driver gnu/lib gnu/usr.bin/cc share/mk sys/sys tools/build/options Message-ID: <86a9jnoynl.fsf@nine.des.no> In-Reply-To: <201309062008.r86K836C048843@svn.freebsd.org> (David Chisnall's message of "Fri, 6 Sep 2013 20:08:03 %2B0000 (UTC)") References: <201309062008.r86K836C048843@svn.freebsd.org>
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David Chisnall <theraven@FreeBSD.org> writes:
> Log:
> On platforms where clang is the default compiler, don't build gcc or libstdc++.
This uncovers what I think is a bug in bsd.prog.mk:
des@ds4 /usr/src/usr.bin% make
===> alias (all)
===> apply (all)
===> ar (all)
===> asa (all)
===> at (all)
===> atf (all)
===> atf/atf-config (all)
make[2]: /usr/obj/usr/src/usr.bin/atf/atf-config/.depend, 111: ignoring stale .depend for /usr/obj/usr/src/tmp/usr/lib/libstdc++.a
c++ -O2 -pipe -march=native -DGDB=\"gdb\" -DHAVE_CONFIG_H -I/usr/src/usr.bin/atf/atf-config/../../../contrib/atf -g -Qunused-arguments -fstack-protector -Wsystem-headers -Werror -Wall -Wno-format-y2k -W -Wno-unused-parameter -Wpointer-arith -Wno-uninitialized -Wno-empty-body -Wno-string-plus-int -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality -Wno-unused-function -Wno-conversion -Wno-c++11-extensions -g -o atf-config atf-config.o -latf-c++ -latf-c
des@ds4 /usr/src/usr.bin% grep libstdc /usr/obj/usr/src/usr.bin/atf/atf-config/.depend
atf-config: /usr/obj/usr/src/tmp/usr/lib/libstdc++.a
des@ds4 /usr/src/usr.bin% stat /usr/obj/usr/src/tmp/usr/lib/libstdc++.a
stat: /usr/obj/usr/src/tmp/usr/lib/libstdc++.a: stat: No such file or directory
That line was added by bsd.prog.mk:
.if defined(PROG_CXX)
.if !empty(CXXFLAGS:M-stdlib=libc++)
echo ${PROG}: ${LIBCPLUSPLUS} >> ${DEPENDFILE}
.else
echo ${PROG}: ${LIBSTDCPLUSPLUS} >> ${DEPENDFILE}
.endif
.endif
AFAICT, this logic should be inverted on platforms where clang is the
default compiler - perhaps like this:
Index: share/mk/bsd.prog.mk
===================================================================
--- share/mk/bsd.prog.mk (revision 255393)
+++ share/mk/bsd.prog.mk (working copy)
@@ -173,7 +173,7 @@
.else
echo ${PROG}: ${LIBC} ${DPADD} >> ${DEPENDFILE}
.if defined(PROG_CXX)
-.if !empty(CXXFLAGS:M-stdlib=libc++)
+.if ${MK_CLANG_IS_CC} != "no" || !empty(CXXFLAGS:M-stdlib=libc++)
echo ${PROG}: ${LIBCPLUSPLUS} >> ${DEPENDFILE}
.else
echo ${PROG}: ${LIBSTDCPLUSPLUS} >> ${DEPENDFILE}
although this misses the case where CLANG_IS_CC but we still want the
old libstdc++ - is that even possible?
DES
--
Dag-Erling Smørgrav - des@des.no
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