Hi, 'https://wiki.debian.org/qa.debian.org/FTBFS' see: 2024-03-13 -Werror=implicit-function-declaration ... In dpkg version 1.22.6, the compiler flag -Werror=implicit-function-declaration was enabled by default for all architectures in build flags ... ...
You need to patch libnginx-mod-http-modsecurity source code: ~~~ diff --git a/config b/config index c6e7467..3bf06a8 100644 --- a/config +++ b/config @@ -10,7 +10,8 @@ ngx_feature_name= ngx_feature_run=no -ngx_feature_incs="#include <modsecurity/modsecurity.h>" +ngx_feature_incs="#include <modsecurity/modsecurity.h> +#include <stdio.h>" ngx_feature_libs="-lmodsecurity" ngx_feature_test='printf("hello");' ngx_modsecurity_opt_I= ~~~ Jan