[DRE-maint] Bug#873440: ruby-grpc FTBFS: cc1: error: -Wformat-security ignored without -Wformat

[Adrian Bunk]

Source: ruby-grpc
Version: 1.3.2+debian-3
Severity: serious

https://buildd.debian.org/status/package.php?p=ruby-grpc&suite=sid

...
gcc -I. -I/usr/include/aarch64-linux-gnu/ruby-2.3.0 -I/usr/include/ruby-2.3.0/ruby/backward -I/usr/include/ruby-2.3.0 -I. -Wdate-time -D_FORTIFY_SOURCE=2   -fPIC -g -O2 -fdebug-prefix-map=/build/ruby2.3-gbHtXr/ruby2.3-2.3.3=. -fstack-protector-strong -Wformat -Werror=format-security -fPIC -I/<<BUILDDIR>>/ruby-grpc-1.3.2+debian/debian/ruby-grpc/usr/lib/aarch64-linux-gnu/rubygems-integration/2.3.0/gems/grpc-1.3.2/include -std=c99  -Wall  -Wextra  -pedantic  -Wno-format   -o rb_byte_buffer.o -c rb_byte_buffer.c
cc1: error: -Wformat-security ignored without -Wformat [-Werror=format-security]