nanopolish: fix macOS build: pass environment's $CXXFLAGS to make (#2…

…1330)

Fast5 uses static_assert, which is from C++11 -- which is later than
the default language standard on conda's macOS compiler. Explicitly
pass $CXXFLAGS down, as it includes `-std=c++14` and so makes
static_assert available.

recipes/nanopolish/build.sh

@@ -10,10 +10,10 @@ mkdir -p $PREFIX/bin
 
 # Linker options aren't passed to minimap2
 pushd minimap2
-make CFLAGS="$CFLAGS" LIBS="-L$PREFIX/lib -lm -lz -pthread" libminimap2.a
+make CFLAGS="$CFLAGS" CXXFLAGS="$CXXFLAGS" LIBS="-L$PREFIX/lib -lm -lz -pthread" libminimap2.a
 popd
 
-make HDF5=noinstall EIGEN=noinstall HTS=noinstall MINIMAP=noinstall CXXFLAGS="-Iminimap2 -g -O3" LDFLAGS="$LDFLAGS -pthread -fopenmp"
+make HDF5=noinstall EIGEN=noinstall HTS=noinstall MINIMAP=noinstall CXXFLAGS="$CXXFLAGS -Iminimap2 -g -O3" LDFLAGS="$LDFLAGS -pthread -fopenmp"
 cp nanopolish $PREFIX/bin
 cp scripts/nanopolish_makerange.py $PREFIX/bin
 cp scripts/nanopolish_merge.py $PREFIX/bin

recipes/nanopolish/meta.yaml

@@ -6,8 +6,7 @@ package:
   version: {{ version }}
 
 build:
-  number: 0
-  skip: True  # [osx]
+  number: 1
   binary_relocation: False
 
 source: