[Buildroot] [PATCH v2] package/boost: fixup Optimization flag in boost build

[Peter Korsgaard <peter@korsgaard.com>]

>>>>> "Michael" == Michael Nosthoff <buildroot@heine.tech> writes:

 > When building with Boost Build the CXXFLAGS are extended depending
 > on the optimization level set. When not defined explicitly the
 > optimization level depends on the <variant>. For release it's 'speed'
 > and for debug it's set to 'off'

 > These flags overwrite the -O flag passed in with TARGET_CXXFLAGS as
 > it is appended when calling g++.

 > This commit sets the Optimization flags generated by Boost Build
 > to the value of TARGET_OPTIMIZATION no matter what level is used.

 > As Boost Build offers no nice way to alter those values the gcc
 > toolchain file is altered directly.

 > Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
 > ---

 > v1 -> v2:
 >   - use sed to manipulate gcc.jam directly
 >   - remove extending user-config.jam

Committed to 2020.02.x and 2020.05.x, thanks.

-- 
Bye, Peter Korsgaard