[Buildroot] [PATCH v2, 1/1] package/libkcapi: fix build with BR2_OPTIMIZE_0

[Arnout Vandecappelle]

On 10/04/2022 12:30, Fabrice Fontaine wrote:
> Override CPPFLAGS to fix the following build failure with BR2_OPTIMIZE_0
> raised since bump to version 0.14.0 in commit
> cd707a9112e38b4ce98326b96c0ed12054ca1cca and
> https://github.com/smuellerDD/libkcapi/commit/0e7b2b0300782aca19c324f3352f109777b4c51a:
> 
> /home/autobuild/autobuild/instance-15/output-1/host/i686-buildroot-linux-gnu/sysroot/usr/include/features.h:412:4: error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp]
> 
> It should be noted that upstream already rejected a PR to remove
> -Werror: https://github.com/smuellerDD/libkcapi/pull/132
> 
> Fixes:
>   - http://autobuild.buildroot.org/results/35141ea3046f5a4593e0b27ef92e4ace6bc0be66
> 
> Signed-off-by: Fabrice Fontaine <fontaine.fabrice at gmail.com>

  Applied to master, thanks.

  Regards,
  Arnout

> ---
> Changes v1 -> v2 (after review of Arnout Vandecappelle):
>   - Override CPPFLAGS instead of COMMON_CPPFLAGS as -D_FORTIFY_SOURCE=2
>     is added to CPPFLAGS by ax_add_fortify_source.m4
> 
>   package/libkcapi/libkcapi.mk | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/package/libkcapi/libkcapi.mk b/package/libkcapi/libkcapi.mk
> index 71dfbd9eff..30d500696b 100644
> --- a/package/libkcapi/libkcapi.mk
> +++ b/package/libkcapi/libkcapi.mk
> @@ -15,6 +15,7 @@ LIBKCAPI_CONF_ENV = \
>   	ac_cv_path_DB2PDF="" \
>   	ac_cv_path_DB2PS="" \
>   	ac_cv_path_XMLTO=""
> +LIBKCAPI_MAKE_OPTS = CPPFLAGS="$(TARGET_CPPFLAGS)"
>   
>   ifeq ($(BR2_PACKAGE_LIBKCAPI_ENCAPP),y)
>   LIBKCAPI_CONF_OPTS += --enable-kcapi-encapp