- seems like the ICU detection broken now and pulls ins system ICU files which leads to `HAVE_ICU` defined and ends up with a broken build
```
[69/79] Compiling C++ object src/libharfbuzz-icu.so.0.50200.0.p/hb-icu.cc.o
FAILED: src/libharfbuzz-icu.so.0.50200.0.p/hb-icu.cc.o
/mnt/build/LibreELEC-RR/build.LibreELEC-x11.x86_64-11.0-devel/toolchain/bin/x86_64-libreelec-linux-gnu-g++ -Isrc/libharfbuzz-icu.so.0.50200.0.p -Isrc -I../src -I. -I.. -I/usr/include -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wnon-virtual-dtor -std=c++11 -fno-rtti -O0 -fno-exceptions -fno-rtti -fno-threadsafe-statics -fvisibility-inlines-hidden -DHAVE_CONFIG_H -march=x86-64-v2 -Wall -pipe -O2 -fomit-frame-pointer -DNDEBUG -fPIC -Wno-non-virtual-dtor -MD -MQ src/libharfbuzz-icu.so.0.50200.0.p/hb-icu.cc.o -MF src/libharfbuzz-icu.so.0.50200.0.p/hb-icu.cc.o.d -o src/libharfbuzz-icu.so.0.50200.0.p/hb-icu.cc.o -c ../src/hb-icu.cc
CROSS COMPILE Badness: /usr/include in INCLUDEPATH: /usr/include
cc1plus: internal compiler error: in add_path, at incpath.cc:481
0x6b83d4 _start
../sysdeps/x86_64/start.S:115
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
```
update 3.0.0 (2021-09-17) to 3.1.1 (2021-11-08)
Overview of changes leading to 3.1.1
Wednesday, November 8, 2021
====================================
- Work around GCC cast-align error/warning on some platforms. (Behdad Esfahbod)
- Documentation improvements. (Matthias Clasen)
Overview of changes leading to 3.1.0
Wednesday, November 3, 2021
====================================
- Better offset-overflow handling in the subsetter library. (Garret Rieger)
- Improved Unicode 14 properties in the USE shaper, and various other USE
shaper fixes. (David Corbett)
- MATH and COLR v1 tables subsetting support, and various other subsetter fixes.
(Qunxin Liu)
- Support for Pwo Karen / Ason Chin medial la. (Simon Cozens)
- Apply GPOS positioning when substituting with morx table, if kerx is missing.
(Behdad Esfahbod)
- Apply calt and clig features across syllable boundaries in Indic shaper.
(Behdad Esfahbod)
- meson option for enabling Graphite 2 has been renamed to graphite2.
- Build and documentation fixes.
- New API:
+hb_buffer_set_not_found_glyph()
+hb_buffer_get_not_found_glyph()
