<p><b>@cladmi</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/RIOT-OS/RIOT/pull/11246#discussion_r269236751">cpu/esp32/Makefile.include</a>:</p>
<pre style='color:#555'>> @@ -93,6 +89,7 @@ CFLAGS  += -DLOG_TAG_IN_BRACKETS
 CFLAGS  += -Wno-unused-parameter -Wformat=0
 CFLAGS  += -mlongcalls -mtext-section-literals -fstrict-volatile-bitfields
 CFLAGS  += -fdata-sections -fzero-initialized-in-bss
+CFLAGS  += -ffunction-sections
</pre>
<p>Yep I will do.</p>

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