[ET Trac] #2807: Hydro_RNSD passes CFLAGS to LD

[Roland Haas]

#2807: Hydro_RNSD passes CFLAGS to LD

 Reporter: Roland Haas
   Status: new
Milestone: 
  Version: 
     Type: bug
 Priority: minor
Component: EinsteinToolkit thorn

Hydro\_RNSID passed CFLAGS to LD when linking its utilities:  

```
HYDRO_RNS_LDFLAGS := $(HYDRO_RNS_CFLAGS) $(DEBUG_LD) $(LDFLAGS) $(EXTRAFLAGS) $(GENERAL_LIBRARIES
```

‌

this fails if `LD` is `nvcc` which will not accept a `-std=gnu99` or `-std=c99` option typically present in `CFLAGS` since it only accepts C\+\+ language flavors.

This is similar to #2553 where Cactus pass `CPPFLAGS` and `CXXFLAGS` to `LD`

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2807/hydro_rnsd-passes-cflags-to-ld
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