Rework the build system to be more modular

Split most of the work off into make/base.mk and allow for easy wrappers
to be created around that that can build with different instrumentation
in their own build directory.

Create wrappers for the following:
 - release build
 - debug build
 - afl++ fuzzing build
 - static analysis with clang
 - clang memory sanitizer
 - clang address/undefined sanitizer

validate.sh

@@ -2,19 +2,17 @@
 
 set -euo pipefail
 
-# Start with static analysis
-make clean all
-mkdir -p reports/static-analysis
-scan-build -o reports/static-analysis/ -plist-html --status-bugs make all
+make analyze debug asan msan
 
-# Run the sanitizer builds and valgrind
-make clean sanitize all
+ASAN=build/asan/oas
+MSAN=build/msan/oas
+DEBUG=build/debug/oas
 
 ARGUMENTS=("tokens" "text" "ast")
 while IFS= read -r INPUT_FILE; do
     for ARGS in ${ARGUMENTS[@]}; do
-        ./oas-asan $ARGS $INPUT_FILE > /dev/null
-        ./oas-msan $ARGS $INPUT_FILE > /dev/null
-        valgrind --leak-check=full --error-exitcode=1 ./oas $ARGS $INPUT_FILE >/dev/null
+        $ASAN $ARGS $INPUT_FILE > /dev/null
+        $MSAN $ARGS $INPUT_FILE > /dev/null
+        valgrind --leak-check=full --error-exitcode=1 $DEBUG $ARGS $INPUT_FILE >/dev/null
     done
 done < <(find tests/input/ -type f -name '*.asm')