Update build instructions

xiph · Jun 16, 2023 · 4414db0 · 4414db0
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commit 4414db0
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diff --git a/README b/README
@@ -73,10 +73,13 @@ On Apple macOS, install Xcode and brew.sh, then in the Terminal enter:
 
 2) Compiling the source
 
+    % git submodule update --init
     % ./autogen.sh
     % ./configure
     % make
 
+On x86, it's a good idea to use a -march= option that allows the use of AVX2.
+
 3) Install the codec libraries (optional)
 
     % sudo make install