Date: Mon, 18 Mar 2019 11:02:28 -0600 From: Dan Allen <danallen46@gmail.com> To: "freebsd-stable@freebsd.org Mailing FreeBSD-STABLE" <freebsd-stable@freebsd.org> Subject: ifuncs check flawed? Message-ID: <35A0AE5B-B25D-4067-86E3-325E65F3C1F4@gmail.com>
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I have been building FreeBSD for many years, as in since 2.2.8.
Currently my amd64 build of 12-STABLE is built with the following =
src.conf:
WITHOUT_BHYVE=3D1
WITHOUT_CAPSICUM=3D1
WITHOUT_CDDL=3D1
WITHOUT_CLANG_EXTRAS=3D1
WITHOUT_CLANG_FULL=3D1
WITHOUT_CROSS_COMPILER=3D1
WITHOUT_DEBUG_FILES=3D1
WITHOUT_EXAMPLES=3D1
WITHOUT_HYPERV=3D1
WITHOUT_JAIL=3D1
WITHOUT_LOCALES=3D1
WITHOUT_PROFILE=3D1
WITHOUT_QUOTAS=3D1
WITHOUT_TESTS=3D1
And a make.conf of:
BATCH=3Dyes
MK_CDDL=3Dno
MK_CLANG_EXTRAS=3Dno
MK_DEBUG_FILES=3Dno
MK_NO_PROFILE=3Dyes
MK_TESTS=3Dno
OPTIONS_UNSET=3DJAVA
WITH_JADETEX=3Dno
WITHOUT_CDDL=3Dyes
WITHOUT_CLANG_FULL=3Dyes
WITHOUT_CTF=3Dyes
WITHOUT_CTM=3Dyes
DISABLE_VULNERABILITIES=3Dyes
So far, so good. (I do this to fit the whole thing onto a CD-image.)
Fooling around, and using xhyve on my Mac, I want to build a i386 =
version in a VM.
So I grabbed the 20190314 snapshot of 12-STABLE, i386 flavor, and =
installed it. Works great.
Now to rebuild the world.
The buildworld and buildkernel steps both immediately fail due to the =
linker not supporting ifuncs.
The code that stops the buildworld is this from =
/usr/src/lib/libc/Makefile:
---
.if (${LIBC_ARCH} =3D=3D amd64 || ${LIBC_ARCH} =3D=3D i386) && \
${.TARGETS:Mall} =3D=3D all && \
defined(LINKER_FEATURES) && ${LINKER_FEATURES:Mifunc} =3D=3D ""
.error ${LIBC_ARCH} libc requires linker ifunc support
.endif
---
However the linker on my system is the lld linker that supports ifuncs! =
Why does this check fail?
I am building on i386 but I am only building i386, as in I am not =
building all targets or amd64.
I edited the two Makefiles that have this check to remove the check and =
the builds proceed just fine.
So it appears that these checks are flawed, or I am soon to learn =
something new about FreeBSD!
Thanks,
Dan Allen
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