tREADME.md: add instructions on build versions - granular - granular dynamics simulation
 (HTM) git clone git://src.adamsgaard.dk/granular
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 (DIR) README
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 (DIR) commit 50bfdd9a9cab50af07ee70e3f62de9fb3656aa4a
 (DIR) parent 4a19dc89eaa19b3f3b61c14805371cbbdf9f35ac
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Thu, 25 Mar 2021 18:31:34 +0100
       
       README.md: add instructions on build versions
       
       Diffstat:
         M README.md                           |      11 +++++++++++
       
       1 file changed, 11 insertions(+), 0 deletions(-)
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 (DIR) diff --git a/README.md b/README.md
       t@@ -3,5 +3,16 @@
        Simulate granular mechanics with minimal external dependencies, respecting
        unix principles.
        
       +## Building and installing
       +
       +To build a fast version for performance, compile with the following
       +command:
       +
       +        $ make CFLAGS="-O3"
       +
       +To build with debug symbols for development, compile with the command:
       +
       +        $ make CFLAGS="-Wall -Wextra -pedantic -g"
       +
        ## Author
        Anders Damsgaard https://adamsgaard.dk