[gentoo-user] why does emerge libstdc++ want to install gcc-3.3.6-r1?

[John Blinka]

Hi, all,

I have 5 up-to-date gentoo machines, all of them running gcc-4.1.1-r3.
On 4 of them, emerging libstdc++ proceeds as one might expect, just 
installing
the current version of libstdc++ for gcc-4.1.1.  But the 5th machine does
something quite different.  Why?

On the 5th machine emerge -pv libstdc++ gives this output:

[ebuild  NS   ] sys-devel/gcc-3.3.6-r1  USE="fortran gcj gtk (-altivec) 
-bootstrap -boundschecking -build -doc (-hardened) -ip28 -ip32r10k 
(-multilib) -multislot (-n32) (-n64) -nls -nocxx -nopie -nossp -objc 
-test -vanilla" 23,534 kB
[ebuild  N    ] virtual/libstdc++-3.3  0 kB

Why should it install gcc-3.3.6-r1 for machine 5?  That doesn't seem to 
be necessary for
machines 1-4.

I've tried running emerge -pdv libstdc++ on all machines to get debug 
info, hoping that it would
enlighten me, but it doesn't - perhaps that's my shortcoming rather than 
emerge's...  For what
it's worth, the first few lines of output from emerge -pdv libstdc++ on 
the machine that wants to install gcc are:

myaction None
myopts {'--pretend': True, '--debug': True, '--verbose': True}

These are the packages that would be merged, in order:

Calculating dependencies 
Parent:    None
Depstring: virtual/libstdc++
Priority: soft
Virtual Parent:    virtual/libstdc++-3.3
Virtual Depstring: || ( =sys-libs/libstdc++-v3-3.3* =sys-devel/gcc-3.3* ) 
Candidates: ['=sys-devel/gcc-3.3*', '=virtual/libstdc++-3.3']
   ebuild: sys-devel/gcc-3.3.6-r1


and the first few lines from machines that don't want to install gcc are:

myaction None
myopts {'--pretend': True, '--debug': True, '--verbose': True}

These are the packages that would be merged, in order:

Calculating dependencies 
Parent:    None
Depstring: sys-libs/libstdc++-v3
Priority: soft
Candidates: ['sys-libs/libstdc++-v3']
   ebuild: sys-libs/libstdc++-v3-3.3.4

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