fix(docker/builder): enforce DRAIOS_DEBUG_FLAGS to DNDEBUG when BUILD_TYPE=debug

This is a temporary fix for Travis CI (which is where we use
falco-builder docker image).

Was already done in the past (see:
9285aa59c1 (diff-354f30a63fb0907d4ad57269548329e3)).

Signed-off-by: Leonardo Di Donato <leodidonato@gmail.com>

docker/builder/Dockerfile

@@ -36,9 +36,7 @@ RUN source scl_source enable devtoolset-7 && \
     rm -rf /tmp/cmake-${CMAKE_VERSION}
 
 # fixme: deps needs a fix into CMakeLists.txt
-RUN yum -y install libyaml-devel
-
-RUN yum clean all -y
+RUN yum -y install libyaml-devel && yum clean all -y
 
 COPY ./root /
 

docker/builder/root/usr/bin/entrypoint

@@ -9,8 +9,10 @@ shift
 
 # Build type can be "debug" or "release", fallbacks to "release" by default
 BUILD_TYPE=$(echo "$BUILD_TYPE" | tr "[:upper:]" "[:lower:]")
+DRAIOS_DEBUG_FLAGS=
 case "$BUILD_TYPE" in
 "debug")
+    DRAIOS_DEBUG_FLAGS="-D_DEBUG -DNDEBUG"
     ;;
 *)
     BUILD_TYPE="release"
@@ -39,6 +41,7 @@ case "$CMD" in
     -DBUILD_BPF="$BUILD_BPF" \
     -DBUILD_WARNINGS_AS_ERRORS="$BUILD_WARNINGS_AS_ERRORS" \
     -DFALCO_VERSION="$FALCO_VERSION" \
+    -DDRAIOS_DEBUG_FLAGS="$DRAIOS_DEBUG_FLAGS" \
     "$SOURCE_DIR/falco"
     exit "$(printf '%d\n' $?)"
     ;;