gcc7 from devel:gcc project

需要 openSUSE Factory zSystems ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory_zSystems/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Factory RISCV ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory_RISCV/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Factory PPC ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory_PPC/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Factory LegacyX86 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory_LegacyX86/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Factory ARM ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory_ARM/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Factory ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Factory/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 openSUSE Leap 15.6 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/openSUSE_Leap_15.6/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 SLE-15 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/SLE-15/devel:gcc.repo
zypper refresh
zypper install gcc7

需要 SLE-12 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:gcc/SLE-12/devel:gcc.repo
zypper refresh
zypper install gcc7