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Merge pull request #1766 from mkbel/update_readme 

Update readme
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Marek Běl 2019-04-25 05:49:32 +00:00 committed by GitHub
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@ -53,6 +53,9 @@ _(after installation, the item is labeled as `"INSTALLED"` and can then be used
add "-Wl,-u,vfprintf -lprintf_flt -lm" to "compiler.c.elf.flags=" before existing flag "-Wl,--gc-sections" add "-Wl,-u,vfprintf -lprintf_flt -lm" to "compiler.c.elf.flags=" before existing flag "-Wl,--gc-sections"
example: example:
`"compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"` `"compiler.c.elf.flags=-w -Os -Wl,-u,vfprintf -lprintf_flt -lm -Wl,--gc-sections"`
The file can be found in Arduino instalation directory, or after Arduino has been updated at:
"C:\Users\(user)\AppData\Local\Arduino15\packages\arduino\hardware\avr\(version)"
If you can locate the file in both places, file from user profile is probably used.
#### 2. Source code compilation #### 2. Source code compilation