package/nginx: add debug logging support

Signed-off-by: Martin Bark <martin@barkynet.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/nginx/Config.in

@@ -354,6 +354,14 @@ config BR2_PACKAGE_NGINX_STREAM_UPSTREAM_ZONE_MODULE
 
 endif #BR2_PACKAGE_NGINX_STREAM
 
+config BR2_PACKAGE_NGINX_DEBUG
+	bool "debug logging"
+	help
+	  Enable debug logging. The debug level should be set with
+	  the error_log directive. For example
+
+	  error_log /var/log/nginx/error.log debug;
+
 comment "misc. modules"
 
 config BR2_PACKAGE_NGINX_SELECT_MODULE

package/nginx/nginx.mk

@@ -226,6 +226,9 @@ NGINX_CONF_OPTS += \
 
 endif # BR2_PACKAGE_NGINX_STREAM
 
+# Debug logging
+NGINX_CONF_OPTS += $(if $(BR2_PACKAGE_NGINX_DEBUG),--with-debug)
+
 define NGINX_DISABLE_WERROR
 	$(SED) 's/-Werror//g' -i $(@D)/auto/cc/*
 endef