Travis-CI: Enable RISC-V32 project compilation

.travis.yml

@@ -9,6 +9,7 @@ env:
     - TOOLS_DIR=$HOME/build_tools
     - GNAT_BIN_PATH=$TOOLS_DIR/gnat-community-2018-x86_64-linux-bin
     - GNAT_ARM_BIN_PATH=$TOOLS_DIR/gnat-community-2018-arm-elf-bin
+    - GNAT_RV32_BIN_PATH=$TOOLS_DIR/gnat-community-2018-riscv32-elf-bin
     - INSTALL_CONTROL_SCRIPT=$PWD/scripts/GNAT_CE_2018_install_control.qs
 
 os:
@@ -25,21 +26,25 @@ install:
   # not, download it.
   - test -f $GNAT_BIN_PATH ||( mkdir -p $TOOLS_DIR &&  wget http://mirrors.cdn.adacore.com/art/5b0d7bffa3f5d709751e3e04 -O $GNAT_BIN_PATH)
   - test -f $GNAT_ARM_BIN_PATH ||( mkdir -p $TOOLS_DIR &&  wget http://mirrors.cdn.adacore.com/art/5b0c1227a3f5d7097625478d -O $GNAT_ARM_BIN_PATH)
+  - test -f $GNAT_RV32_BIN_PATH ||( mkdir -p $TOOLS_DIR &&  wget http://mirrors.cdn.adacore.com/art/5b0c154aa3f5d70976254791 -O $GNAT_RV32_BIN_PATH)
 
   - wget https://raw.githubusercontent.com/AdaCore/gnat_community_install_script/master/install_package.sh
   - wget https://raw.githubusercontent.com/AdaCore/gnat_community_install_script/master/install_script.qs
 
   - sh install_package.sh $GNAT_BIN_PATH $TOOLS_DIR/native/
   - sh install_package.sh $GNAT_ARM_BIN_PATH $TOOLS_DIR/arm-elf/
+  - sh install_package.sh $GNAT_RV32_BIN_PATH $TOOLS_DIR/riscv32-elf/
 
   # Add GNAT to $PATH
   - export PATH=$PATH:$TOOLS_DIR/native/bin/
   - export PATH=$PATH:$TOOLS_DIR/arm-elf/bin/
+  - export PATH=$PATH:$TOOLS_DIR/riscv32-elf/bin/
 
 script:
   # Show GNAT version for the record
   - $TOOLS_DIR/native/bin/gprbuild --version
   - $TOOLS_DIR/arm-elf/bin/gprbuild --version
+  - $TOOLS_DIR/riscv32-elf/bin/gprbuild --version
 
   # Install extra run-times
   - python $PWD/scripts/install_dependencies.py

scripts/build_all_examples.py

@@ -5,7 +5,7 @@
 import os.path
 import subprocess
 import sys
-
+import distutils.spawn
 
 ROOT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 
@@ -146,6 +146,12 @@ def gprbuild(project_file, debug=False):
             STM_DRIVERS + "/demo_usart_polling/demo_usart_polling.gpr",
             ]
 
+# Check if RISC-V32 compiler is available
+if distutils.spawn.find_executable("riscv32-elf-gnatls"):
+
+    # Add RISC-V32 projects
+    projects += ["/examples/HiFive1/hifive1_example.gpr"]
+
 parser = argparse.ArgumentParser('Compile all the Ada_Drivers_Library examples')
 
 parser.add_argument(