[GRASS-user] Failure to compile GRASS GIS 7.8 with Proj 6 and GDAL 3

[Nikos Alexandris]

Dears,

I cannot get GRASS GIS 7.8 to compile with

```
eselect gcc show
x86_64-pc-linux-gnu-9.2.0
```
+
```
make --version
GNU Make 4.2.1
```
+
zlib version 1.2.11-r3
+
```
eselect python show
python3.7
```
+
```
flex --version
flex 2.6.4
```
+
```
proj
Rel. 6.0.0, March 1st, 2019
```
+
```
geos-config --version
3.7.0
```
+
```
gdal-config --version
3.0.4
```
+
```
make distclean
./configure --with-freetype=yes --with-freetype-includes="/usr/include/freetype2/" --with-readline --with-geos
make
```

The `error.log` here: https://pastebin.com/rEgMmcPT
Running make from inside few directories with error(s):  https://pastebin.com/PisKVBHP