Maintainers for cpp-9-sh4-linux-gnu are Debian GCC Maintainers <[email protected]>.
You may want to refer to the following packages that are part of the same source: cpp-9-alpha-linux-gnu, cpp-9-hppa-linux-gnu, cpp-9-m68k-linux-gnu, cpp-9-powerpc-linux-gnu, cpp-9-powerpc64-linux-gnu, cpp-9-riscv64-linux-gnu, cpp-9-sparc64-linux-gnu, cpp-9-x86-64-linux-gnux32, g++-9-alpha-linux-gnu, g++-9-hppa-linux-gnu, g++-9-m68k-linux-gnu, g++-9-multilib-powerpc-linux-gnu, g++-9-multilib-powerpc64-linux-gnu, g++-9-multilib-sparc64-linux-gnu, g++-9-multilib-x86-64-linux-gnux32, g++-9-powerpc-linux-gnu, g++-9-powerpc64-linux-gnu, g++-9-riscv64-linux-gnu, g++-9-sh4-linux-gnu, g++-9-sparc64-linux-gnu, g++-9-x86-64-linux-gnux32, gcc-9-alpha-linux-gnu, gcc-9-alpha-linux-gnu-base, gcc-9-cross-base-ports, gcc-9-hppa-linux-gnu, gcc-9-hppa-linux-gnu-base, gcc-9-m68k-linux-gnu, gcc-9-m68k-linux-gnu-base, gcc-9-multilib-powerpc-linux-gnu, gcc-9-multilib-powerpc64-linux-gnu, gcc-9-multilib-sparc64-linux-gnu, gcc-9-multilib-x86-64-linux-gnux32, gcc-9-plugin-dev-alpha-linux-gnu, gcc-9-plugin-dev-hppa-linux-gnu, gcc-9-plugin-dev-m68k-linux-gnu, gcc-9-plugin-dev-powerpc-linux-gnu, gcc-9-plugin-dev-powerpc64-linux-gnu, gcc-9-plugin-dev-riscv64-linux-gnu, gcc-9-plugin-dev-sh4-linux-gnu, gcc-9-plugin-dev-sparc64-linux-gnu, gcc-9-plugin-dev-x86-64-linux-gnux32, gcc-9-powerpc-linux-gnu, gcc-9-powerpc-linux-gnu-base, gcc-9-powerpc64-linux-gnu, gcc-9-powerpc64-linux-gnu-base, gcc-9-riscv64-linux-gnu, gcc-9-riscv64-linux-gnu-base, gcc-9-sh4-linux-gnu, gcc-9-sh4-linux-gnu-base, gcc-9-sparc64-linux-gnu, gcc-9-sparc64-linux-gnu-base, gcc-9-x86-64-linux-gnux32, gcc-9-x86-64-linux-gnux32-base, gccbrig-9-x86-64-linux-gnux32, gccgo-9-alpha-linux-gnu, gccgo-9-multilib-powerpc-linux-gnu, gccgo-9-multilib-powerpc64-linux-gnu, gccgo-9-multilib-sparc64-linux-gnu, gccgo-9-multilib-x86-64-linux-gnux32, gccgo-9-powerpc-linux-gnu, gccgo-9-powerpc64-linux-gnu, gccgo-9-riscv64-linux-gnu, gccgo-9-sh4-linux-gnu, gccgo-9-sparc64-linux-gnu, gccgo-9-x86-64-linux-gnux32, gdc-9-alpha-linux-gnu, gdc-9-hppa-linux-gnu, gdc-9-m68k-linux-gnu, gdc-9-multilib-powerpc-linux-gnu, gdc-9-multilib-powerpc64-linux-gnu, gdc-9-multilib-sparc64-linux-gnu, gdc-9-multilib-x86-64-linux-gnux32, gdc-9-powerpc-linux-gnu, gdc-9-powerpc64-linux-gnu, gdc-9-riscv64-linux-gnu, gdc-9-sh4-linux-gnu, gdc-9-sparc64-linux-gnu, gdc-9-x86-64-linux-gnux32, gfortran-9-alpha-linux-gnu, gfortran-9-hppa-linux-gnu, gfortran-9-m68k-linux-gnu, gfortran-9-multilib-powerpc-linux-gnu, gfortran-9-multilib-powerpc64-linux-gnu, gfortran-9-multilib-sparc64-linux-gnu, gfortran-9-multilib-x86-64-linux-gnux32, gfortran-9-powerpc-linux-gnu, gfortran-9-powerpc64-linux-gnu, gfortran-9-riscv64-linux-gnu, gfortran-9-sh4-linux-gnu, gfortran-9-sparc64-linux-gnu, gfortran-9-x86-64-linux-gnux32, gm2-9-alpha-linux-gnu, gm2-9-hppa-linux-gnu, gm2-9-m68k-linux-gnu, gm2-9-riscv64-linux-gnu, gm2-9-sparc64-linux-gnu, gm2-9-x86-64-linux-gnux32, gnat-9-alpha-linux-gnu, gnat-9-hppa-linux-gnu, gnat-9-m68k-linux-gnu, gnat-9-powerpc-linux-gnu, gnat-9-powerpc64-linux-gnu, gnat-9-riscv64-linux-gnu, gnat-9-sh4-linux-gnu, gnat-9-sparc64-linux-gnu, gnat-9-x86-64-linux-gnux32, gobjc++-9-alpha-linux-gnu, gobjc++-9-hppa-linux-gnu, gobjc++-9-m68k-linux-gnu, gobjc++-9-multilib-powerpc-linux-gnu, gobjc++-9-multilib-powerpc64-linux-gnu, gobjc++-9-multilib-sparc64-linux-gnu, gobjc++-9-multilib-x86-64-linux-gnux32, gobjc++-9-powerpc-linux-gnu, gobjc++-9-powerpc64-linux-gnu, gobjc++-9-riscv64-linux-gnu, gobjc++-9-sh4-linux-gnu, gobjc++-9-sparc64-linux-gnu, gobjc++-9-x86-64-linux-gnux32, gobjc-9-alpha-linux-gnu, gobjc-9-hppa-linux-gnu, gobjc-9-m68k-linux-gnu, gobjc-9-multilib-powerpc-linux-gnu, gobjc-9-multilib-powerpc64-linux-gnu, gobjc-9-multilib-sparc64-linux-gnu, gobjc-9-multilib-x86-64-linux-gnux32, gobjc-9-powerpc-linux-gnu, gobjc-9-powerpc64-linux-gnu, gobjc-9-riscv64-linux-gnu, gobjc-9-sh4-linux-gnu, gobjc-9-sparc64-linux-gnu, gobjc-9-x86-64-linux-gnux32, lib32asan5-ppc64-cross, lib32asan5-sparc64-cross, lib32asan5-x32-cross, lib32gcc-9-dev-ppc64-cross, lib32gcc-9-dev-sparc64-cross, lib32gcc-9-dev-x32-cross, lib32gfortran-9-dev-ppc64-cross, lib32gfortran-9-dev-sparc64-cross, lib32gfortran-9-dev-x32-cross, lib32go-9-dev-ppc64-cross, lib32go-9-dev-sparc64-cross, lib32go-9-dev-x32-cross, lib32go14-ppc64-cross, lib32go14-sparc64-cross, lib32go14-x32-cross, lib32gphobos-9-dev-x32-cross, lib32gphobos76-x32-cross, lib32objc-9-dev-ppc64-cross, lib32objc-9-dev-sparc64-cross, lib32objc-9-dev-x32-cross, lib32stdc++-9-dev-ppc64-cross, lib32stdc++-9-dev-sparc64-cross, lib32stdc++-9-dev-x32-cross, lib64asan5-powerpc-cross, lib64asan5-x32-cross, lib64gcc-9-dev-powerpc-cross, lib64gcc-9-dev-x32-cross, lib64gfortran-9-dev-powerpc-cross, lib64gfortran-9-dev-x32-cross, lib64go-9-dev-powerpc-cross, lib64go-9-dev-x32-cross, lib64go14-powerpc-cross, lib64go14-x32-cross, lib64gphobos-9-dev-x32-cross, lib64gphobos76-x32-cross, lib64objc-9-dev-powerpc-cross, lib64objc-9-dev-x32-cross, lib64stdc++-9-dev-powerpc-cross, lib64stdc++-9-dev-x32-cross, libasan5-powerpc-cross, libasan5-ppc64-cross, libasan5-sparc64-cross, libasan5-x32-cross, libgcc-9-dev-alpha-cross, libgcc-9-dev-hppa-cross, libgcc-9-dev-m68k-cross, libgcc-9-dev-powerpc-cross, libgcc-9-dev-ppc64-cross, libgcc-9-dev-riscv64-cross, libgcc-9-dev-sh4-cross, libgcc-9-dev-sparc64-cross, libgcc-9-dev-x32-cross, libgfortran-9-dev-alpha-cross, libgfortran-9-dev-hppa-cross, libgfortran-9-dev-m68k-cross, libgfortran-9-dev-powerpc-cross, libgfortran-9-dev-ppc64-cross, libgfortran-9-dev-riscv64-cross, libgfortran-9-dev-sh4-cross, libgfortran-9-dev-sparc64-cross, libgfortran-9-dev-x32-cross, libgm2-0-alpha-cross, libgm2-0-hppa-cross, libgm2-0-m68k-cross, libgm2-0-riscv64-cross, libgm2-0-sparc64-cross, libgm2-0-x32-cross, libgm2-9-dev-alpha-cross, libgm2-9-dev-hppa-cross, libgm2-9-dev-m68k-cross, libgm2-9-dev-riscv64-cross, libgm2-9-dev-sparc64-cross, libgm2-9-dev-x32-cross, libgnat-9-alpha-cross, libgnat-9-hppa-cross, libgnat-9-m68k-cross, libgnat-9-powerpc-cross, libgnat-9-ppc64-cross, libgnat-9-riscv64-cross, libgnat-9-sh4-cross, libgnat-9-sparc64-cross, libgnat-9-x32-cross, libgo-9-dev-alpha-cross, libgo-9-dev-powerpc-cross, libgo-9-dev-ppc64-cross, libgo-9-dev-riscv64-cross, libgo-9-dev-sh4-cross, libgo-9-dev-sparc64-cross, libgo-9-dev-x32-cross, libgo14-alpha-cross, libgo14-powerpc-cross, libgo14-ppc64-cross, libgo14-riscv64-cross, libgo14-sh4-cross, libgo14-sparc64-cross, libgo14-x32-cross, libgphobos-9-dev-riscv64-cross, libgphobos-9-dev-x32-cross, libgphobos76-riscv64-cross, libgphobos76-x32-cross, libhsail-rt-9-dev-x32-cross, libobjc-9-dev-alpha-cross, libobjc-9-dev-hppa-cross, libobjc-9-dev-m68k-cross, libobjc-9-dev-powerpc-cross, libobjc-9-dev-ppc64-cross, libobjc-9-dev-riscv64-cross, libobjc-9-dev-sh4-cross, libobjc-9-dev-sparc64-cross, libobjc-9-dev-x32-cross, libstdc++-9-dev-alpha-cross, libstdc++-9-dev-hppa-cross, libstdc++-9-dev-m68k-cross, libstdc++-9-dev-powerpc-cross, libstdc++-9-dev-ppc64-cross, libstdc++-9-dev-riscv64-cross, libstdc++-9-dev-sh4-cross, libstdc++-9-dev-sparc64-cross, libstdc++-9-dev-x32-cross, libstdc++-9-pic-alpha-cross, libstdc++-9-pic-hppa-cross, libstdc++-9-pic-m68k-cross, libstdc++-9-pic-powerpc-cross, libstdc++-9-pic-ppc64-cross, libstdc++-9-pic-riscv64-cross, libstdc++-9-pic-sh4-cross, libstdc++-9-pic-sparc64-cross, libstdc++-9-pic-x32-cross.
You might like to refer to the cpp-9-sh4-linux-gnu package page, to the Package Tracking System, or to the source package src:gcc-9-cross-ports's bug page.
If you find a bug not listed here, please report it.