[PATCH 19.11 20.11 v2] pmdinfogen: fix compilation with Clang 3.4.2 on CentOS 7

[Christian Ehrhardt]

On Wed, Mar 30, 2022 at 4:12 PM <luca.boccassi at gmail.com> wrote:

> From: Luca Boccassi <bluca at debian.org>
>
> $ meson --werror --buildtype=debugoptimized build && ninja-build -C build
> [..]
> [5/2516] Compiling C object
> buildtools/pmdinfogen/pmdinfogen.p/pmdinfogen.c.o
> FAILED: buildtools/pmdinfogen/pmdinfogen.p/pmdinfogen.c.o
> clang -Ibuildtools/pmdinfogen/pmdinfogen.p -Ibuildtools/pmdinfogen
> -I../../root/dpdk/buildtools/pmdinfogen -I. -I../../root/dpdk -Iconfig
> -I../../root/dpdk/config -Ilib/librte_eal/include
> -I../../root/dpdk/lib/librte_eal/include -Ilib/librte_eal/linux/include
> -I../../root/dpdk/lib/librte_eal/linux/include -Ilib/librte_eal/x86/include
> -I../../root/dpdk/lib/librte_eal/x86/include -Ilib/librte_pci
> -I../../root/dpdk/lib/librte_pci -Xclang -fcolor-diagnostics -pipe
> -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Werror -O2 -g -MD -MQ
> buildtools/pmdinfogen/pmdinfogen.p/pmdinfogen.c.o -MF
> buildtools/pmdinfogen/pmdinfogen.p/pmdinfogen.c.o.d -o
> buildtools/pmdinfogen/pmdinfogen.p/pmdinfogen.c.o -c
> ../../root/dpdk/buildtools/pmdinfogen/pmdinfogen.c
> ../../root/dpdk/buildtools/pmdinfogen/pmdinfogen.c:431:27: error: missing
> field 'hdr' initializer [-Werror,-Wmissing-field-initializers]
>         struct elf_info info = {0};
>                                  ^
> 1 error generated.
> [..]
>
> Use memset instead.
>
> Bugzilla ID: 984
>
> Fixes: 0decf84217f1 ("buildtools: zero elf info variable in pmdinfogen")
>

Works fine for me across distributions/architectures, applied replacing the
v1


> Signed-off-by: Luca Boccassi <bluca at debian.org>
> Reviewed-by: Christian Ehrhardt <christian.ehrhardt at canonical.com>
> ---
> structured init broke old gcc 4, switch to memset
>
>  buildtools/pmdinfogen/pmdinfogen.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/buildtools/pmdinfogen/pmdinfogen.c
> b/buildtools/pmdinfogen/pmdinfogen.c
> index a68d1ea999..f7133267be 100644
> --- a/buildtools/pmdinfogen/pmdinfogen.c
> +++ b/buildtools/pmdinfogen/pmdinfogen.c
> @@ -428,7 +428,7 @@ static void output_pmd_info_string(struct elf_info
> *info, char *outfile)
>
>  int main(int argc, char **argv)
>  {
> -       struct elf_info info = {0};
> +       struct elf_info info;
>         int rc = 1;
>
>         if (argc < 3) {
> @@ -437,6 +437,7 @@ int main(int argc, char **argv)
>                         basename(argv[0]));
>                 exit(127);
>         }
> +       memset(&info, 0, sizeof(struct elf_info));
>         use_stdin = !strcmp(argv[1], "-");
>         use_stdout = !strcmp(argv[2], "-");
>         parse_elf(&info, argv[1]);
> --
> 2.34.1
>
>

-- 
Christian Ehrhardt
Staff Engineer, Ubuntu Server
Canonical Ltd
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