Check in CI that all installed headers are usable

ci-tests/build-spike

@@ -11,7 +11,7 @@ mkdir install
 CXXFLAGS="-Wnon-virtual-dtor" CFLAGS="-Werror -Wignored-qualifiers -Wunused-function -Wunused-parameter -Wunused-variable" $DIR/../configure --prefix=`pwd`/install
 make -j"$(nproc 2> /dev/null || sysctl -n hw.ncpu)"
 make check
-make install
+make install install-hdrs-list.h
 
 # check that help message prints without error
 install/bin/spike -h

ci-tests/test-spike

@@ -16,5 +16,8 @@ time ../install/bin/spike --isa=rv64gc pk hello | grep "Hello, world!  Pi is app
 g++ -std=c++2a -I../install/include -L../install/lib $DIR/testlib.cc -lriscv -o test-libriscv
 g++ -std=c++2a -I../install/include -L../install/lib $DIR/test-customext.cc -lriscv -o test-customext
 
+# check that all installed headers are functional
+g++ -std=c++2a -I../install/include -L../install/lib $DIR/testlib.cc -lriscv -o /dev/null -include ../install-hdrs-list.h
+
 LD_LIBRARY_PATH=../install/lib ./test-libriscv pk hello| grep "Hello, world!  Pi is approximately 3.141588."
 LD_LIBRARY_PATH=../install/lib ./test-customext pk dummy-slliuw | grep "Executed successfully"