On 7/30/20 1:57 PM, Kaige Li wrote:
> When I compile qemu with such as:
>
> git clone https://git.qemu.org/git/qemu.git
> cd qemu
> git submodule init
> git submodule update --recursive
> ./configure
> make
Again, timeless information is not useful.
>
> There is error log:
>
> /home/LiKaige/qemu/target/arm/translate-a64.c: In function ‘disas_ldst’:
> /home/LiKaige/qemu/target/arm/translate-a64.c:3392:5: error: ‘fn’ may be used
> uninitialized in this function [-Werror=maybe-uninitialized]
> fn(cpu_reg(s, rt), clean_addr, tcg_rs, get_mem_index(s),
> ^
> /home/LiKaige/qemu/target/arm/translate-a64.c:3318:22: note: ‘fn’ was
> declared here
> AtomicThreeOpFn *fn;
> ^
> cc1: all warnings being treated as errors
Again, what compiler / version are you using? My guess is you are
using an old GCC, and I wonder if it is still supported.
>
> So, add an initiallization value NULL for fn to fix this.
>
> Signed-off-by: Kaige Li <lika...@loongson.cn>
> ---
> target/arm/translate-a64.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
> index 8c07649..c98dfb1 100644
> --- a/target/arm/translate-a64.c
> +++ b/target/arm/translate-a64.c
> @@ -3315,7 +3315,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t
> insn,
> bool r = extract32(insn, 22, 1);
> bool a = extract32(insn, 23, 1);
> TCGv_i64 tcg_rs, clean_addr;
> - AtomicThreeOpFn *fn;
> + AtomicThreeOpFn *fn = NULL;
>
> if (is_vector || !dc_isar_feature(aa64_atomics, s)) {
> unallocated_encoding(s);
>
