--- Begin Message ---
Package: gcc-7
Version: 7-20170226-1
Severity: important
I'm unable to install GCC7 on Debian 8/i386 with Experimental enabled.
Things worked well under x86_64; the issue seems to be limited to
i386.
=====================================
A fresh install of Debian 8.7 for i386. The machine is fully patched.
The following sources are enabled. The last one, experimental, came
from https://wiki.debian.org/DebianExperimental.
deb http://ftp.us.debian.org/debian/ jessie main
deb-src http://ftp.us.debian.org/debian/ jessie main
deb http://security.debian.org/ jessie/updates main contrib
deb-src http://security.debian.org/ jessie/updates main contrib
deb http://ftp.us.debian.org/debian/ jessie-updates main contrib
deb-src http://ftp.us.debian.org/debian/ jessie-updates main contrib
deb http://httpredir.debian.org/debian experimental main
=====================================
# apt-get -t experimental install gcc-7 g++-7
Reading package lists...
Building dependency tree...
Reading state information...
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
g++-7 : Depends: libstdc++-7-dev (= 7-20170226-1) but it is not going
to be installed
Depends: libisl15 (>= 0.15) but it is not installable
Depends: libmpfr4 (>= 3.1.3) but 3.1.2-2 is to be installed
gcc-7 : Depends: cpp-7 (= 7-20170226-1) but it is not going to be installed
Depends: libcc1-0 (>= 7-20170226-1) but it is not going to be installed
Depends: binutils (>= 2.27.90.20170221) but 2.25-5 is to be installed
Depends: libgcc-7-dev (= 7-20170226-1) but it is not going to
be installed
Depends: libisl15 (>= 0.15) but it is not installable
Depends: libmpfr4 (>= 3.1.3) but 3.1.2-2 is to be installed
Depends: libstdc++6 (>= 5) but 4.9.2-10 is to be installed
E: Unable to correct problems, you have held broken packages.
=====================================
Here is GCC7's information from x86_64. It installed fine on x86_64.
The problem appears to be i386.
$ apt-cache show gcc-7
Package: gcc-7
Version: 7-20170226-1
Installed-Size: 145900
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Architecture: amd64
Replaces: gccgo-7 (<< 7-20170226-1)
Provides: c-compiler
Depends: cpp-7 (= 7-20170226-1), gcc-7-base (= 7-20170226-1), libcc1-0
(>= 7-20170226-1), binutils (>= 2.27.90.20170221), libgcc-7-dev (=
7-20170226-1), libc6 (>= 2.14), libgcc1 (>= 1:3.0), libgmp10 (>=
2:5.0.1~), libisl15 (>= 0.15), libmpc3, libmpfr4 (>= 3.1.3),
libstdc++6 (>= 5), zlib1g (>= 1:1.1.4)
Recommends: libc6-dev (>= 2.13-5)
Suggests: gcc-7-multilib, gcc-7-doc (>= 7), gcc-7-locales (>= 7),
libgcc1-dbg (>= 1:7-20170226-1), libgomp1-dbg (>= 7-20170226-1),
libitm1-dbg (>= 7-20170226-1), libatomic1-dbg (>= 7-20170226-1),
libasan4-dbg (>= 7-20170226-1), liblsan0-dbg (>= 7-20170226-1),
libtsan0-dbg (>= 7-20170226-1), libubsan0-dbg (>= 7-20170226-1),
libcilkrts5-dbg (>= 7-20170226-1), libmpx2-dbg (>= 7-20170226-1),
libquadmath0-dbg (>= 7-20170226-1)
Description-en: GNU C compiler
This is the GNU C compiler, a fairly portable optimizing compiler for C.
Description-md5: 394374e688b1afb3af5f419895d29698
Homepage: http://gcc.gnu.org/
Section: devel
Priority: optional
Filename: pool/main/g/gcc-7/gcc-7_7-20170226-1_amd64.deb
Size: 31564834
MD5sum: 137210eb781915b8331db7fc626d83fb
SHA256: 002326bacb91b6ad4844231608378da12080bdf2b904d095a1a6527a8c15e564
$ gcc-7 --version
gcc-7 (Debian 7-20170226-1) 7.0.1 20170226 (experimental) [trunk
revision 245744]
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--- End Message ---