Angus Gratton 2f249edb8e Use std::abs for a float-compatible abs() function (#2738) ... * Other Arduino cores uses a macro to redefine libc abs() to take any type, meaning abs(-3.3) == 3.3 not the normal libc result of 3. * 1e4bf14a3 (#1783) replaced similar min, max macros with c++ stdlib. However this change includes <algorithm> after the line which defines the abs() macro. <algorithm> includes <cstdlib> which undefines abs() and re-defines it. * This means abs() becomes the plain libc version again which only takes integers, so abs(-3.3) == 3. As reported here: https://github.com/espressif/esp-idf/issues/3405 This fix tries to keep in the spirit of #1783 by using libstdc++. The other option would be to include <cstdlib> before defining the abs() macro, so it doesn't get undef-ed again later on.		2019-05-11 11:18:39 +03:00
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esp32	Use std::abs for a float-compatible abs() function (#2738)	2019-05-11 11:18:39 +03:00