darwin workaround for python3

.github/workflows/ci.yml

@@ -101,6 +101,8 @@ jobs:
       CC: ${{ matrix.cc }}
       CXX: ${{ matrix.cxx }}
       RUMPRUN_TOOLCHAIN_TUPLE: ${{ matrix.rumprun_tuple }}
+      C_INCLUDE_PATH: /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/Headers
+      CPLUS_INCLUDE_PATH: /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/Headers
 
     defaults:
       run:
@@ -162,7 +164,7 @@ jobs:
         if: runner.os == 'macos'
         run: |
           mkdir -p ~/.local/bin
-          brew install gnu-sed ccache e2fsprogs
+          brew install gnu-sed ccache e2fsprogs gawk
           brew install binutils coreutils automake
           ln -sf /usr/local/bin/gsed ~/.local/bin/sed
           ln -sf /usr/local/bin/gdate ~/.local/bin/date
@@ -171,6 +173,7 @@ jobs:
           # we didn't use gcp as CoW of coreutil 9.0 breaks somehow
           #ln -sf /usr/local/opt/coreutils/bin/gcp ~/.local/bin/cp
           ln -sf /usr/local/opt/binutils/bin/objcopy ~/.local/bin/objcopy
+          ln -sf /usr/local/bin/gawk ~/.local/bin/awk
 
       - name: ccache counter reset
         run: ccache -z

python3/Makefile

@@ -59,7 +59,10 @@ dl/$(TARBALL):
 build/hostpython: | dl/$(TARBALL)
 	mkdir -p build
 	(cd build && tar -x --strip-components 1 -f ../dl/$(TARBALL))
-	(cd build; CFLAGS=$(HOST_CFLAGS) ./configure --prefix=$(shell pwd)/build/hostdist; make python Parser/pgen && make install)
+ifeq ($(shell uname),Darwin)
+	(cd build && sed "s/^MULTIARCH.*//" configure > /tmp/a; mv /tmp/a configure; chmod +x configure)
+endif
+	(cd build; CFLAGS=$(HOST_CFLAGS) ./configure --prefix=$(shell pwd)/build/hostdist; CFLAGS=-IInclude make python Parser/pgen && make install)
 	mv build/python$(EXESUFFIX) build/hostpython
 
 build/Parser/hostpgen: build/hostpython