missing hardening flags on Debian building

[yuzibo]

hi,
when I was packaging the new upstream release(1.0.1), I got one blhc test failed:

vimer@dev:~/build/rfs/python/ftbfs/opentsne$ blhc ../build-area/opentsne_1.0.1-1_amd64.build
CFLAGS missing (-g -O2 -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection): x86_64-linux-gnu-gcc <<PKGBUILDDIR>>/tmp6x6svb_h/omp.o -o /<<PKGBUILDDIR>>/tmp6x6svb_h/omp.c
CPPFLAGS missing (-D_FORTIFY_SOURCE=2): x86_64-linux-gnu-gcc <<PKGBUILDDIR>>/tmp6x6svb_h/omp.o -o /<<PKGBUILDDIR>>/tmp6x6svb_h/omp.c
LDFLAGS missing (-Wl,-z,relro -Wl,-z,now): x86_64-linux-gnu-gcc <<PKGBUILDDIR>>/tmp6x6svb_h/omp.o -o /<<PKGBUILDDIR>>/tmp6x6svb_h/omp.c

I am not sure if this is false positive for blhc checking, so report it here and please have a look, thanks.

[pavlin-policar]

Hi, thanks for reporting the issue. Unfortunately, I am unfamiliar with the Debian build system and don't really have any idea what build flags could be missing. The compilation flags are all speciifed in the setup.py.