Hello, it looks like
8211029: Have a common set of enabled warnings for all native libraries breaks a lot of our Linux based builds. Our gcc 4.8 misses some of the introduced command line options : cc1plus: error: unrecognized command line option "-Wno-misleading-indentation" [-Werror] cc1plus: error: unrecognized command line option "-Wno-implicit-fallthrough" [-Werror] cc1plus: error: unrecognized command line option "-Wno-int-in-bool-context" [-Werror] Additionally , the added -Werror=switch triggers a LOT of errors on our porting platforms, e.g. linux ppc64 le : /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value '_Double_valueOf' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value '_forEachRemaining' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'ID_LIMIT' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'LAST_COMPILER_INLINE' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'FIRST_MH_SIG_POLY' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'FIRST_MH_STATIC' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'LAST_MH_SIG_POLY' not handled in switch [-Werror=switch] /build_ci_jdk_jdk_linuxppc64le/src/hotspot/cpu/ppc/c1_LIRGenerator_ppc.cpp:719:10: error: enumeration value 'FIRST_ID' not handled in switch [-Werror=switch] Could we get rid of the -Werror=switch at least for now ? Maybe it should be disabled for ppc64 / ppc64le / s390x like it has been done for zero ? 4.13+ 4.14 ifeq ($(call check-jvm-feature, zero), true) 4.15- DISABLED_WARNINGS_gcc += return-type 4.16+ DISABLED_WARNINGS_gcc += return-type switch 4.17 endif Regarding the unrecognized command line options , I suggest to still support older gcc versions; what would be the minimal gcc version that supports 8211029 ? Best regards, Matthias
