fix C++ cross builds

container/conf/setup_native

@@ -37,7 +37,16 @@ function export_elf (
 		new_file="/native/$(basename "$file")"
 	fi
 	[ ! -e "$new_file" ]
-	bbe -e 's|/usr/lib/gcc-cross/|///////usr/lib/gcc/|;s|/usr/libexec/gcc-cross/|///////usr/libexec/gcc/|' < "$file" > "$new_file"
+
+	cat < "$file" \
+	| bbe -e 's|/usr/lib/gcc-cross/|///////usr/lib/gcc/|' \
+	| bbe -e 's|/usr/libexec/gcc-cross/|///////usr/libexec/gcc/|' \
+	| bbe -e 's|/x86_64-linux-gnu/include/c++/13/x86_64-linux-gnu|//////////////////include/x86_64-linux-gnu/c++/13|' \
+	| bbe -e 's|/x86_64-linux-gnu/include/c++/|//////////////////include/c++/|' \
+	| bbe -e 's|/aarch64-linux-gnu/include/c++/13/aarch64-linux-gnu|///////////////////include/aarch64-linux-gnu/c++/13|' \
+	| bbe -e 's|/aarch64-linux-gnu/include/c++/|///////////////////include/c++/|' \
+	> "$new_file"
+
 	if [ -x "$file" ]; then
 		chmod +x "$new_file"
 	fi

container/crossbuild.containerfile

@@ -51,8 +51,11 @@ RUN [ "/native/bash", "-c", "PATH=/native:$PATH ./setup_native import $(awk '{ p
 
 # Run gcc test after setup_native and then clean up /tmp
 RUN gcc --print-search-dir \
-    && echo 'int main() { return 0; }' > main.c \
+    && printf '#include <stdio.h>\nint main() { printf("hello\\n"); return 0; }' > main.c \
     && gcc -o main main.c \
+    && ./main \
+	&& printf '#include <iostream>\nint main() { std::cout << "hello" << std::endl; return 0; }' > main.cpp \
+    && g++ -o main main.cpp \
     && ./main \
     && find /tmp -mindepth 1 -delete