[ET Trac] #2532: try and auto-detect "system" directories to strip from THORN_INC_DIRS and THORN_LIB_DIRS

[Roland Haas]

#2532: try and auto-detect "system" directories to strip from THORN_INC_DIRS and THORN_LIB_DIRS

 Reporter: Roland Haas
   Status: new
Milestone: 
  Version: development version
     Type: enhancement
 Priority: minor
Component: Cactus

Currently we use two utilities `strip-inc-dirs.sh` and `strip-lib-dirs.sh` to remove “system” libraries from `THORN_INC_DIRS` and `THORN_LIB_DIRS` in ExternalLibraries. However the list used is hard-coded and not always correct \(see eg #2528\).

It may be better to:

1. make the list of directories to strip option list variables
2. try to auto-detect them in the Cactus know-architectures files

To auto-detect on GNU/Linux with gcc/ld one can try and use the suggestion on [https://stackoverflow.com/questions/9922949/how-to-print-the-ldlinker-search-path](https://stackoverflow.com/questions/9922949/how-to-print-the-ldlinker-search-path) and [https://stackoverflow.com/questions/17939930/finding-out-what-the-gcc-include-path-is](https://stackoverflow.com/questions/17939930/finding-out-what-the-gcc-include-path-is) namely

```
gcc -print-search-dirs
```

and

```
echo | gcc -E -Wp,-v -
```

‌

--
Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2532/try-and-auto-detect-system-directories-to
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