[meta-oe] xmlrpc-c: Stick to C17

From: "mark.yang" <mark.yang@lge.com>

* Fix build error with gcc-15.0.1
  http://errors.yoctoproject.org/Errors/Details/850147/
    srcdir/lib/util/include/bool.h:13:5: error: cannot use keyword 'false' as enumeration constant
    13 |     false = 0,
        |     ^~~~~
    srcdir/lib/util/include/bool.h:13:5: note: 'false' is a keyword with '-std=c23' onwards
    srcdir/lib/util/include/bool.h:15:3: error: expected ';', identifier or '(' before 'bool'
    15 | } bool;
        |   ^~~~
    srcdir/lib/util/include/bool.h:15:3: warning: useless type name in empty declaration
    In file included from sleep.c:2:
    srcdir/lib/util/include/bool.h:13:5: error: cannot use keyword 'false' as enumeration constant
    13 |     false = 0,
        |     ^~~~~
    srcdir/lib/util/include/bool.h:13:5: note: 'false' is a keyword with '-std=c23' onwards
    srcdir/lib/util/include/bool.h:15:3: error: expected ';', identifier or '(' before 'bool'
    15 | } bool;
        |   ^~~~

    In C23, bool, true, and false are added as reserved keywords, causing build errors.
    However, modifying the source code just for this would be risky, so we set the C standard to C17.

Signed-off-by: mark.yang <mark.yang@lge.com>
---
 meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb | 5 +++++
 1 file changed, 5 insertions(+)

On Tue, Apr 1, 2025 at 4:50 AM mark.yang via lists.openembedded.org
<mark.yang=lge.com@lists.openembedded.org> wrote:
>
> From: "mark.yang" <mark.yang@lge.com>
>
> * Fix build error with gcc-15.0.1
>   http://errors.yoctoproject.org/Errors/Details/850147/
>     srcdir/lib/util/include/bool.h:13:5: error: cannot use keyword 'false' as enumeration constant
>     13 |     false = 0,
>         |     ^~~~~
>     srcdir/lib/util/include/bool.h:13:5: note: 'false' is a keyword with '-std=c23' onwards
>     srcdir/lib/util/include/bool.h:15:3: error: expected ';', identifier or '(' before 'bool'
>     15 | } bool;
>         |   ^~~~
>     srcdir/lib/util/include/bool.h:15:3: warning: useless type name in empty declaration
>     In file included from sleep.c:2:
>     srcdir/lib/util/include/bool.h:13:5: error: cannot use keyword 'false' as enumeration constant
>     13 |     false = 0,
>         |     ^~~~~
>     srcdir/lib/util/include/bool.h:13:5: note: 'false' is a keyword with '-std=c23' onwards
>     srcdir/lib/util/include/bool.h:15:3: error: expected ';', identifier or '(' before 'bool'
>     15 | } bool;
>         |   ^~~~
>
>     In C23, bool, true, and false are added as reserved keywords, causing build errors.
>     However, modifying the source code just for this would be risky, so we set the C standard to C17.
>

See if something like this

https://git.openembedded.org/openembedded-core/tree/meta/recipes-devtools/e2fsprogs/e2fsprogs/0001-libext2fs-fix-std-c23-build-failure.patch

Can be adopted.

> Signed-off-by: mark.yang <mark.yang@lge.com>
> ---
>  meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb b/meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb
> index 62ba0f53e6..cca745cd51 100644
> --- a/meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb
> +++ b/meta-oe/recipes-devtools/xmlrpc-c/xmlrpc-c_1.64.0.bb
> @@ -46,3 +46,8 @@ do_install:append:class-target() {
>  BBCLASSEXTEND = "native"
>
>  CLEANBROKEN = "1"
> +
> +# http://errors.yoctoproject.org/Errors/Details/850147/
> +# srcdir/lib/util/include/bool.h:13:5: note: 'false' is a keyword with '-std=c23' onwards
> +# srcdir/lib/util/include/bool.h:15:3: error: expected ';', identifier or '(' before 'bool'
> +CFLAGS += "-std=gnu17"
> --
> 2.34.1
>
>
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