[Bug bootstrap/85630] New: GCC 8.1.0: Filesystem pollution during build: .cache dir in $HOME

[kdevel at vogtner dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85630

            Bug ID: 85630
           Summary: GCC 8.1.0: Filesystem pollution during build: .cache
                    dir in $HOME
           Product: gcc
           Version: 8.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: kdevel at vogtner dot de
  Target Milestone: ---

After a make bootstrap and make test (which failed, Bug 85629) a directory
named ".cache" is left over in $HOME. It contains a sub-directory "go-build":

$ ls
00  09  12  1b  24  2d  36  3f  48  51  5a  63  6c  75  7e  87  90  99  a2  ab 
b4  bd  c6  cf  d8  e1  ea  f3  fc
01  0a  13  1c  25  2e  37  40  49  52  5b  64  6d  76  7f  88  91  9a  a3  ac 
b5  be  c7  d0  d9  e2  eb  f4  fd
02  0b  14  1d  26  2f  38  41  4a  53  5c  65  6e  77  80  89  92  9b  a4  ad 
b6  bf  c8  d1  da  e3  ec  f5  fe
03  0c  15  1e  27  30  39  42  4b  54  5d  66  6f  78  81  8a  93  9c  a5  ae 
b7  c0  c9  d2  db  e4  ed  f6  ff
04  0d  16  1f  28  31  3a  43  4c  55  5e  67  70  79  82  8b  94  9d  a6  af 
b8  c1  ca  d3  dc  e5  ee  f7  log.txt
05  0e  17  20  29  32  3b  44  4d  56  5f  68  71  7a  83  8c  95  9e  a7  b0 
b9  c2  cb  d4  dd  e6  ef  f8  README
06  0f  18  21  2a  33  3c  45  4e  57  60  69  72  7b  84  8d  96  9f  a8  b1 
ba  c3  cc  d5  de  e7  f0  f9  trim.txt
07  10  19  22  2b  34  3d  46  4f  58  61  6a  73  7c  85  8e  97  a0  a9  b2 
bb  c4  cd  d6  df  e8  f1  fa
08  11  1a  23  2c  35  3e  47  50  59  62  6b  74  7d  86  8f  98  a1  aa  b3 
bc  c5  ce  d7  e0  e9  f2  fb

$ cat README 
This directory holds cached build artifacts from the Go build system.
Run "go clean -cache" if the directory is getting too large.
See golang.org to learn more about Go.

These files shall be placed in the build-directory and not in $HOME.