[joaohf]

Hello,

When building wings with GCC 16.2, I got the following build issue. I just want to check if they make sense to you? I did not try to execute wings yet (I'll report it soon). However, updating libs and also the eigen_assert macro solved the situation.

aarch64-poky-linux-gcc  -mcpu=cortex-a57+crc -mbranch-protection=standard -fstack-protector-strong  -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/wo
rk/cortexa57-poky-linux/wings/2.4.1+git/recipe-sysroot  -O2 -g -fcanon-prefix-map  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/sources/wings=/usr/src/debug/wings/2.4.1+git
  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/sources/wings=/usr/src/debug/wings/2.4.1+git  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/c
ortexa57-poky-linux/wings/2.4.1+git/recipe-sysroot=  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/recipe-sysroot-native=  -pipe -fvisibility-inlines-hidden -Wno-deprecated-
declarations -Wno-unknown-pragmas -Wno-switch  -O2 -g -fcanon-prefix-map  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/sources/wings=/usr/src/debug/wings/2.4.1+git  -ffile-
prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/sources/wings=/usr/src/debug/wings/2.4.1+git  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-
poky-linux/wings/2.4.1+git/recipe-sysroot=  -ffile-prefix-map=/data-work/yocto/builds/bitbake-builds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/recipe-sysroot-native=  -pipe -g -O3 -fPIC  -I"/data-work/yocto/builds/bitbake-buil
ds/wings/build/tmp/work/cortexa57-poky-linux/wings/2.4.1+git/recipe-sysroot-native/usr/lib/erlang/usr/include" -I../_deps/eigen -I../_deps/libigl/include  -o../priv/libigl.so libigl.cpp -shared -lstdc++
In file included from ../_deps/libigl/include/igl/boundary_facets.h:54,
                 from ../_deps/libigl/include/igl/vector_area_matrix.cpp:9,
                 from ../_deps/libigl/include/igl/vector_area_matrix.h:38,
                 from ../_deps/libigl/include/igl/lscm.cpp:10,
                 from ../_deps/libigl/include/igl/lscm.h:46,
                 from libigl.cpp:42:
../_deps/libigl/include/igl/boundary_facets.cpp: In function 'void igl::boundary_facets(const Eigen::MatrixBase<Derived>&, Eigen::PlainObjectBase<DerivedF>&, Eigen::PlainObjectBase<DerivedJ>&, Eigen::PlainObjectBase<DerivedK>&)':
../_deps/libigl/include/igl/boundary_facets.cpp:86:30: error: return type of 'const Eigen::ArrayBase<Eigen::ArrayWrapper<Eigen::Matrix<int, -1, 1> > >::RCmpEQReturnType Eigen::operator==(const ArrayBase<ArrayWrapper<Matrix<int, -1, 1> > >::Sc
alar&, const ArrayWrapper<Matrix<int, -1, 1> >&)' is not 'bool' [-Wtemplate-body]
   86 |   const int ones = (C.array()==1).count();
      |                     ~~~~~~~~~^~~
../_deps/libigl/include/igl/boundary_facets.cpp:86:30: note: used as rewritten candidate for comparison of 'Eigen::ArrayWrapper<Eigen::Matrix<int, -1, 1> >' and 'int'
In file included from ../_deps/eigen/Eigen/SparseCore:47,
                 from ../_deps/eigen/Eigen/Sparse:26,
                 from ../_deps/libigl/include/igl/lscm.h:14:

[dgud]

Thanks, the reason for my libigl was a patch for windows a long time ago, will see if it works, but then maybe we should hardcode
the igl version as well.