Merge #2538

2538: Fix the ARM build again r=mergify[bot] a=nextgens

I have double-checked from the builder and this works.

gcc -v from the alpine image tells me that we have  ``--enable-default-pie``

Co-authored-by: Florent Daigniere <nextgens@freenetproject.org>

core/base/Dockerfile

@@ -19,10 +19,10 @@ RUN set -euxo pipefail \
     || apk add --no-cache --repository=http://dl-cdn.alpinelinux.org/alpine/edge/testing hardened-malloc
 
 ENV LD_PRELOAD=/usr/lib/libhardened_malloc.so
-ENV CXXFLAGS="-g -O2 -fdebug-prefix-map=/app=. -fstack-protector-strong -Wformat -Werror=format-security -pie -fPIE"
+ENV CXXFLAGS="-g -O2 -fdebug-prefix-map=/app=. -fstack-protector-strong -Wformat -Werror=format-security -fstack-clash-protection -fexceptions"
-ENV CFLAGS="-g -O2 -fdebug-prefix-map=/app=. -fstack-protector-strong -Wformat -Werror=format-security -pie -fPIE"
+ENV CFLAGS="-g -O2 -fdebug-prefix-map=/app=. -fstack-protector-strong -Wformat -Werror=format-security -fstack-clash-protection -fexceptions"
-ENV CPPFLAGS="-Wdate-time -D_FORTIFY_SOURCE=2 -pie -fPIE"
+ENV CPPFLAGS="-Wdate-time -D_FORTIFY_SOURCE=2"
-ENV LDFLAGS="-Wl,-z,relro"
+ENV LDFLAGS="-Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now"
 
 WORKDIR /app