unifdef from devel:tools project

For openSUSE Tumbleweed run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/openSUSE_Tumbleweed/devel:tools.repo
zypper refresh
zypper install unifdef

For openSUSE Slowroll run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/openSUSE_Slowroll/devel:tools.repo
zypper refresh
zypper install unifdef

For openSUSE Factory zSystems run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/openSUSE_Factory_zSystems/devel:tools.repo
zypper refresh
zypper install unifdef

For openSUSE Factory PowerPC run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/openSUSE_Factory_PowerPC/devel:tools.repo
zypper refresh
zypper install unifdef

For openSUSE Factory ARM run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/openSUSE_Factory_ARM/devel:tools.repo
zypper refresh
zypper install unifdef

For 15.6 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/15.6/devel:tools.repo
zypper refresh
zypper install unifdef

For 15.5 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/15.5/devel:tools.repo
zypper refresh
zypper install unifdef

For 15.7 run the following as root:

zypper addrepo https://download.opensuse.org/repositories/devel:tools/15.7/devel:tools.repo
zypper refresh
zypper install unifdef

For 16.0 run the following as root:

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