THRIFT-4295: rework the docker build images, updating them and tuning the travis builds
This closes #1340
diff --git a/lib/d/Makefile.am b/lib/d/Makefile.am
index 5c529ba..2a81218 100644
--- a/lib/d/Makefile.am
+++ b/lib/d/Makefile.am
@@ -177,7 +177,7 @@
touch $@
unittest/debug/%: src/%.d $(all_targets) unittest/emptymain.d
- $(DMD) -gc -of$(subst /,$(DMD_OF_DIRSEP),$@) $(d_test_flags) $^
+ $(DMD) -g -of$(subst /,$(DMD_OF_DIRSEP),$@) $(d_test_flags) $^
unittest/release/%: src/%.d $(all_targets) unittest/emptymain.d
$(DMD) -O -release -of$(subst /,$(DMD_OF_DIRSEP),$@) $(d_test_flags) $^