Merge branch 'release' into 'master'

Release v2.5.0

See merge request gnu/riscv-gnu-toolchain!33

Author: bluewww

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [2.5.0] - 2021-10-30
 ### Added
 - gcc: Add `xfhalf`, `xfalthalf`, `xfhalfinx` and `xfhalthalfinx` support. This
   means code generation in the backend, libgcc changes to make softfloat

MAINTAINERS.md

@@ -88,9 +88,16 @@ make check RUNTEST=$HOME/tmp/pulp-new-gcc/bin/runtest RUNTESTFLAGS="--target_boa
 ```
 
 ### gcc
-Using `make check` from gcc
+Using `make check` from `build-gcc-newlib-stage2/`
 
 ```
+# make sure that you have a site.exp file that defines 'target_triplet', 'src_dir' etc.
+# if it doesn't exist, you can just run
+make report-gcc
+# which will generate these files for you
+# then make sure that DEJAGNULIBS points to the local dejagnu installation
+DEJAGNULIBS=$HOME/tmp/pulp-new-gcc/share/dejagnu
+# and finally run the tests with
 make check-gcc RUNTESTFLAGS="execute.exp=scal-to-vec1* --target_board=riscv-sim"
 make check-gcc RUNTESTFLAGS="riscv.exp=pulp*  -target_board='riscv-sim'"
 ```