Support building for more big endian architectures

CMakeLists.txt

@@ -94,13 +94,15 @@ else ()
     set_property(TARGET Pcap++ PROPERTY COMPILE_WARNING_AS_ERROR OFF)
     set_property(TARGET Common++ PROPERTY COMPILE_WARNING_AS_ERROR OFF)
     list(APPEND APP_LINK_LIB Pcap++)
-    if (ZIG_TARGET STREQUAL mips-linux-musl)
+    set(ZIG_BE "mips" "mips64" "armeb" "powerpc64" "powerpc" "aarch64_be" "s390x")
+    list(FIND ZIG_BE "${ZIG_TARGET_ARCH}" INDEX)
+    if (${INDEX} GREATER -1)
+        message(STATUS "Patching Layer.h to support big endian when cross-compiling")
         add_custom_command(
                 OUTPUT ${PcapPlusPlus_SOURCE_DIR}/Packet++/header/Layer.h
                 WORKING_DIRECTORY ${PcapPlusPlus_SOURCE_DIR}
                 COMMAND patch -Np1 -i ${CMAKE_SOURCE_DIR}/endian.patch || true
                 DEPENDS ${CMAKE_SOURCE_DIR}/endian.patch
-                COMMENT "Patching for big endian"
         )
         add_custom_target(PatchLayer ALL DEPENDS ${PcapPlusPlus_SOURCE_DIR}/Packet++/header/Layer.h)
         add_dependencies(Pcap++ PatchLayer)

tests/README.md

@@ -23,6 +23,6 @@ cmake --build build pppwn_pybind
 Test 3: Output the packet generated by the C++ version.
 
 ```shell
-cmake -B build -DBUILD_TEST=ON -DCMAKE_BUILD_TYPE=Debug -DPython3_EXECUTABLE=$(which python3)
+cmake -B build -DBUILD_TEST=ON
 cmake --build build pppwn_output
 ```