Date: Mon, 05 Mar 2012 10:51:52 +0000 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: freebsd-questions@freebsd.org Subject: Re: on purpose or forgotten ? hardcoded compiler in basesystem-makefiles Message-ID: <4F549AC8.4030305@infracaninophile.co.uk> In-Reply-To: <4F54919A.6050108@Haakh.de> References: <4F54919A.6050108@Haakh.de>
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On 05/03/2012 10:12, Dr. A. Haakh wrote:
> a quick search revealed following usages:
Some of the instances you've found are legitimate, some are in upstream
code in contributed software -- the FreeBSD build process may not even
use the Makefiles concerned. But, yes on the whole, I think you're on
to something that needs fixing here.
> FreeBSD abaton.Haakh.de 9.0-STABLE FreeBSD 9.0-STABLE #0: Wed Feb 29
> 13:49:36 CET 2012 toor@abaton.Haakh.de:/usr/obj/usr/src/sys/ABATON =
> i386
>=20
> ah@abaton:~$ find /usr/src/ -name Makefile\* -exec egrep
> '^[[:blank:]]+[gc+]{2,3}[[:blank:]]+..' {} \; -print
[...]
> /usr/src/usr.bin/make/Makefile.dist
> gcc -M $(CFLAGS) $(SRC) >> Makefile.tmp
Although it doesn't seem to appear in the clang(1) man page, clang
supports the -M flag:
lucid-nonsense:/tmp:# clang -M hello.c
hello.o: hello.c /usr/include/stdio.h /usr/include/sys/cdefs.h \
/usr/include/sys/_null.h /usr/include/sys/_types.h \
/usr/include/machine/_types.h
No need for this sort of construct to be gcc specific.
> /usr/src/tools/test/dtrace/Makefile
> c++ -o $@ $< -lpthread
Not sure about this -- the intent may be to test the default system
compiler -- as of this last weekend you can install clang(1) as
/usr/bin/cc in stable/9, so this isn't necessarily gcc specific.
> /usr/src/tools/regression/pthread/unwind/Makefile
> gcc -c -o elftls.o ${.CURDIR}/elftls.S
> gcc -c -o tls-test.o ${.CURDIR}/tls-test-lib.c
> gcc $(CFLAGS) -rdynamic -o ttls3 ${.CURDIR}/tls-test.c
Whereas this looks like an oversight to me.
> /usr/src/crypto/openssl/demos/engines/ibmca/Makefile
> cc -I../../include divtest.c -o divtest ../../libcrypto.a
> cc -g -I../../include bnbug.c -o bnbug ../../libcrypto.a
> gcc -I../../include -g2 -ggdb -o exptest exptest.c ../../libcrypto.=
a
> gcc -I.. -g div.c ../../libcrypto.a
/usr/src/crypto holds raw sources imported from upstream; hard-coded
compiler names here is a problem the openssl project should address.
> /usr/src/contrib/ncurses/Makefile.os2
> g++ -c $(ALL_CFLAGS) $(ALL_CPPFLAGS) $< $(OUTPUT_OPTION)
> g++ -o $@ paranoia.o real.o $(LIBIBERTY)
Ditto /usr/src/contrib -- raw upstream sources.
> /usr/src/contrib/gcc/Makefile.in
> gcc -o asyncwatch asyncwatch.c ${CFLAGS}
> gcc -o devinfo devinfo.c ${CFLAGS}
> gcc -o device_list device_list.c ${CFLAGS}
> gcc -o rc_pingpong rc_pingpong.c pingpong.c ${CFLAGS}
> gcc -o srq_pingpong srq_pingpong.c pingpong.c ${CFLAGS}
=2E.. although gcc being hardwired in the gcc sources is probably
intentional and quite legitimate.
I suggest that you repost your question on freebsd-hackers@freebsd.org,
as that will bring it to the attention of the people both interested in
and capable of addressing this sort of problem. Submitting a PR
wouldn't go amiss either.
Cheers,
Matthew
--=20
Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard
Flat 3
PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate
JID: matthew@infracaninophile.co.uk Kent, CT11 9PW
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