added build information

U-UC\harvey1 · U-UC\harvey1 · commit c8f42c1e40ab · 2015-10-13T12:24:41.000-06:00
diff --git a/BUILD.md b/BUILD.md
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+# Building AS4
+
+Building AS4 is simple, just type make. If you type make here a statically linked and optimised version of the assembler will be built. Type "make debug" for unoptimised code that is profile and debugger friendly.
+
+If you cd in src, typing make will default to the "debug" compilation. Type "make fast" to get the optimised version.
