| Message ID | 20180818190118.12911-9-richard.henderson@linaro.org |
|---|---|
| State | New |
| Headers | show |
| Series | linux-user: Split do_syscall | expand |
Le 18/08/2018 à 21:01, Richard Henderson a écrit : > For the linux-user syscall split, we have static const structs > that must be matched up with a switch statement that uses them. > By default, gcc will not warn for such a variable, but silently > remove them. > > For C++, such objects are sometimes declared for their constructor > side effects. Do not propagate this flag into QEM_CXXFLAGS. > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > configure | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Le 18/08/2018 à 21:01, Richard Henderson a écrit : > For the linux-user syscall split, we have static const structs > that must be matched up with a switch statement that uses them. > By default, gcc will not warn for such a variable, but silently > remove them. > > For C++, such objects are sometimes declared for their constructor > side effects. Do not propagate this flag into QEM_CXXFLAGS. s/QEM_CXXFLAGS/QEMU_CXXFLAGS/ Laurent
Le 18/08/2018 à 21:01, Richard Henderson a écrit : > For the linux-user syscall split, we have static const structs > that must be matched up with a switch statement that uses them. > By default, gcc will not warn for such a variable, but silently > remove them. > > For C++, such objects are sometimes declared for their constructor > side effects. Do not propagate this flag into QEM_CXXFLAGS. > > Signed-off-by: Richard Henderson <richard.henderson@linaro.org> > --- > configure | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/configure b/configure > index db97930314..86e6e18428 100755 > --- a/configure > +++ b/configure > @@ -105,7 +105,8 @@ update_cxxflags() { > for arg in $QEMU_CFLAGS; do > case $arg in > -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\ > - -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls) > + -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls|\ > + -Wunused-const-variable) > ;; > *) > QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }$arg > @@ -1780,6 +1781,7 @@ gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags" > gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags" > gcc_flags="-Wno-string-plus-int $gcc_flags" > gcc_flags="-Wno-error=address-of-packed-member $gcc_flags" > +gcc_flags="-Wunused-const-variable $gcc_flags" > # Note that we do not add -Werror to gcc_flags here, because that would > # enable it for all configure tests. If a configure test failed due > # to -Werror this would just silently disable some features, > This breaks build of hw/misc/macio/gpio.o: In file included from include/hw/misc/macio/macio.h:33, from hw/misc/macio/gpio.c:29: hw/misc/macio/pmu.h:129:21: error: 'pmu_data_len' defined but not used [-Werror=unused-const-variable=] static const int8_t pmu_data_len[256][2] = { ^~~~~~~~~~~~ In file included from include/hw/misc/macio/macio.h:33, from hw/misc/macio/macio.c:33: include/hw/misc/macio/pmu.h:129:21: error: 'pmu_data_len' defined but not used [-Werror=unused-const-variable=] static const int8_t pmu_data_len[256][2] = { ^~~~~~~~~~~~ This can be fixed by moving pmu_data_len array from pmu.h to pmu.c as it is the only user. Thanks, Laurent
diff --git a/configure b/configure index db97930314..86e6e18428 100755 --- a/configure +++ b/configure @@ -105,7 +105,8 @@ update_cxxflags() { for arg in $QEMU_CFLAGS; do case $arg in -Wstrict-prototypes|-Wmissing-prototypes|-Wnested-externs|\ - -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls) + -Wold-style-declaration|-Wold-style-definition|-Wredundant-decls|\ + -Wunused-const-variable) ;; *) QEMU_CXXFLAGS=${QEMU_CXXFLAGS:+$QEMU_CXXFLAGS }$arg @@ -1780,6 +1781,7 @@ gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags" gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags" gcc_flags="-Wno-string-plus-int $gcc_flags" gcc_flags="-Wno-error=address-of-packed-member $gcc_flags" +gcc_flags="-Wunused-const-variable $gcc_flags" # Note that we do not add -Werror to gcc_flags here, because that would # enable it for all configure tests. If a configure test failed due # to -Werror this would just silently disable some features,
For the linux-user syscall split, we have static const structs that must be matched up with a switch statement that uses them. By default, gcc will not warn for such a variable, but silently remove them. For C++, such objects are sometimes declared for their constructor side effects. Do not propagate this flag into QEM_CXXFLAGS. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- configure | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.17.1