Remove old gcc Versions

[tomtom2017]

Hello again,

on my gentoo system I have several versions of gcc installed:
4.7.3
4.8.1-r1
4.9.2
6.3.0

I'd like to get rid of maybe 4.7 and 4.8 - but when I try to uninstall those using paludis, I get a conflict, no matter which version I choose.

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I cannot proceed without being permitted to do the following:

X   dev-db/mysql 5.6.36:0::installed
    Will be broken by uninstalls:
    Reasons: dependent upon sys-devel/gcc-4.7.3:4.7.4::installed (DEPEND)
    Cannot proceed without: --uninstalls-may-break or --remove-if-dependent

X   sys-apps/paludis 2.6.0:0::installed
    Will be broken by uninstalls:
    Reasons: dependent upon sys-devel/gcc-4.7.3:4.7.4::installed (DEPEND)
    Cannot proceed without: --uninstalls-may-break or --remove-if-dependent

X   sys-libs/glibc 2.17:2.2::installed
    Will be broken by uninstalls:
    Reasons: dependent upon sys-devel/gcc-4.7.3:4.7.4::installed (DEPEND)
    Cannot proceed without: --uninstalls-may-break or --remove-if-dependent

I don't understand why theses 3 are depending on all gcc-Verisons. Is there something to be done which I am not aware of?
To my understanding, I already switched to the latest gcc

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webserver ~ # gcc --version
gcc (Gentoo 6.3.0 p1.0) 6.3.0
Copyright (C) 2016 Free Software Foundation, Inc.

Could someone please help me?
Thanks!

Tom

[John R. Graham]

Sure. To fix,

1. Make sure gcc-config selects a newer compiler (it probably already does).
2. Run

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   source /etc/profile; source ~/.bash_profile

3. Rebuild the packages Paludis is complaining about.

That should do it.

- John

[tomtom2017]

Hi John,

thanks for your support.

1. Already did that
2. There is no bash_profile there.
3. Reinstalled all three packages

Paludis still doesn't want to uninstall old gcc-Versions.

This is from the mysql-ebuild:

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DEPEND="|| ( >=sys-devel/gcc-3.4.6 >=sys-devel/gcc-apple-4.0 )"

Paludis ebuild says

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DEPEND=">=sys-devel/gcc-4.7

glibc-ebuild tells us

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DEPEND+=">=sys-devel/gcc-4.7

So everything should be fine if I uninstall 4.7 because there are still 3 newer versions of gcc installed.
Could this be a bug in paludis or something? I'm lost here.

Thanks again.

Regards,
Thomas[/quote]

[baaann]

I am seeing a similar situation with gcc-5.4.0-r3 and app-text/pdftk

Uninstalling app-text/pdftk allows removal of gcc-5.4.0-r3 however after doing so and trying to re-install app-text/pdftk, I get the following

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emerge -av pdftk                                          

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

Calculating dependencies... done!
[ebuild  NS    ] sys-devel/gcc-5.4.0-r3:5.4.0::gentoo [6.4.0:6.4.0::gentoo] USE="cxx fortran gcj (multilib) nls nptl openmp sanitize vtv (-altivec) (-awt) -cilk -debug -doc (-fixed-point) -go -graphite (-hardened) (-jit) (-libssp) -mpx -nopie -nossp -objc -objc++ -objc-gc -regression-test -vanilla" 0 KiB
[ebuild  N     ] app-text/pdftk-2.02::gentoo  0 KiB

Total: 2 packages (1 new, 1 in new slot), Size of downloads: 0 KiB

and yet the pdftk ebuild does not depend on a specific version

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="http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/"
SRC_URI="http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/${P}-src.zip"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="amd64 ~arm ppc x86 ~amd64-linux"

DEPEND="sys-devel/gcc[gcj]"
RDEPEND="${DEPEND}"

S="${WORKDIR}/${P}-dist/${PN}"

src_prepare() {
        epatch "${FILESDIR}"/${P}-flags.patch
}

src_compile() {
        # Settings by java-config break compilation by gcj.
        unset CLASSPATH
        unset JAVA_HOME

        # Parallel make fails; confirmed, still not fixed in version 2.02.
        emake -j1 -f "${S}"/Makefile.Debian || die "Compilation failed."
}

src_install() {
        dobin pdftk
        doman ../pdftk.1
        dohtml ../pdftk.1.html
}

[/code]
current gcc version

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gcc-config -l
 [1] x86_64-pc-linux-gnu-6.4.0 *

[Josef.95]

@baaann,
for app-text/pdftk is sys-devel/gcc[gcj] required,
and gcc-5 is currently the last version with USE=gcj available.
(USE=gcj useflag is on gcc:6.4.0 masked).

Example:

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# emerge -pv pdftk

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

Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy "sys-devel/gcc[gcj]".
!!! One of the following packages is required to complete your request:
- sys-devel/gcc-5.4.0-r3::gentoo (Change USE: +gcj)
(dependency required by "app-text/pdftk-2.02::gentoo" [ebuild])
(dependency required by "pdftk" [argument])

[baaann]

@baaann,
for app-text/pdftk is sys-devel/gcc[gcj] required,
and gcc-5 is currently the last version with USE=gcj available.
(USE=gcj useflag is on gcc:6.4.0 masked).

Example:

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# emerge -pv pdftk

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

Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy "sys-devel/gcc[gcj]".
!!! One of the following packages is required to complete your request:
- sys-devel/gcc-5.4.0-r3::gentoo (Change USE: +gcj)
(dependency required by "app-text/pdftk-2.02::gentoo" [ebuild])
(dependency required by "pdftk" [argument])

Many thanks Josef, I honestly thought I had checked that......but pretty obvious once you do

[mike155]

@tomtom2017: what does "emerge -p --depclean" show?