Add Linux and MinGW build support

.gitignore

@@ -0,0 +1,46 @@
+# New Makefile build directories
+/obj/
+/lib/
+
+# Compiler and linker output
+*.o
+*.obj
+*.d
+*.a
+*.so
+*.so.*
+*.dll
+*.dll.a
+*.lib
+*.exe
+*.out
+*.pdb
+
+# Files produced by the legacy makefile
+/ccsds_tab.c
+/ccsds_tal.c
+/gen_ccsds
+/gen_ccsds_tal
+/peaktest
+/sumsq_test
+/dtest
+/vtest27
+/vtest29
+/vtest615
+/rstest
+/core
+/core.*
+/autom4te.cache/
+
+# Editor and operating-system files
+*~
+*.swp
+*.swo
+*.tmp
+*.bak
+.DS_Store
+Thumbs.db
+
+# IDE settings
+/.idea/
+/.vscode/