From d7c6f8ae3f52d7442a7811fece2b6dc0168fa3c9 Mon Sep 17 00:00:00 2001
From: Grant Limberg <grant.limberg@zerotier.com>
Date: Tue, 23 Jun 2020 11:49:43 -0700
Subject: [PATCH] armel/armhf differentiation in builds

---
 CMakeLists.txt         | 15 ++++++++++++++-
 packaging/debian.cmake |  6 ++++++
 packaging/rpm.cmake    |  4 ++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9bfabe84..2cdc35fc4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -154,6 +154,12 @@ if(NOT PACKAGE_STATIC)
 
 			option(BUILD_32BIT "Force building as 32-bit binary" OFF)
 			option(BUILD_STATIC "Build statically linked executable" OFF)
+			option(BUILD_ARM_V5 "Build ARMv5" OFF)
+			option(BUILD_ARM_v6 "Build ARMv6" OFF)
+			
+			if (BUILD_ARM_V5 AND BUILD_ARM_V6) 
+				message(FATAL_ERROR "BUILD_ARM_V5 and BUILD_ARM_V6 are mutually exclusive!")
+			endif()
 
 			if(BUILD_32BIT)
 				set(CMAKE_SYSTEM_PROCESSOR "x86" CACHE STRING "system processor")
@@ -185,6 +191,13 @@ if(NOT PACKAGE_STATIC)
 				)
 			endif(BUILD_STATIC)
 
+			if (BUILD_ARM_V5)
+				set(GOARM "GOARM=5")
+			endif (BUILD_ARM_V5)
+
+			if (BUILD_ARM_v6)
+				set(GOARM "GOARM=6")
+			endif (BUILD_ARM_V6)
 		endif(APPLE)
 	endif(WIN32)
 
@@ -230,7 +243,7 @@ if(NOT PACKAGE_STATIC)
 		zerotier ALL
 		BYPRODUCTS ${CMAKE_BINARY_DIR}/zerotier
 		SOURCES ${go_src}
-		COMMAND ${CMAKE_COMMAND} -E env ${GOARCH} CGO_ENABLED=1 CGO_CFLAGS=\"-O3\" CGO_LDFLAGS=\"$<TARGET_FILE:zt_core> $<TARGET_FILE:zt_controller> $<TARGET_FILE:zt_service_io_core> $<TARGET_FILE:zt_osdep> ${GO_EXTRA_LIBRARIES}\" ${GO} build ${GOFLAGS} -o ${CMAKE_BINARY_DIR}/${GO_EXE_NAME} ${CMAKE_SOURCE_DIR}/cmd/zerotier/zerotier.go
+		COMMAND ${CMAKE_COMMAND} -E env ${GOARCH} ${GOARM} CGO_ENABLED=1 CGO_CFLAGS=\"-O3\" CGO_LDFLAGS=\"$<TARGET_FILE:zt_core> $<TARGET_FILE:zt_controller> $<TARGET_FILE:zt_service_io_core> $<TARGET_FILE:zt_osdep> ${GO_EXTRA_LIBRARIES}\" ${GO} build ${GOFLAGS} -o ${CMAKE_BINARY_DIR}/${GO_EXE_NAME} ${CMAKE_SOURCE_DIR}/cmd/zerotier/zerotier.go
 		COMMENT "Compiling Go Code..."
 	)
 	add_dependencies(zerotier zt_osdep zt_core zt_controller zt_service_io_core)
diff --git a/packaging/debian.cmake b/packaging/debian.cmake
index 4e7d17c8c..e03845101 100644
--- a/packaging/debian.cmake
+++ b/packaging/debian.cmake
@@ -19,4 +19,10 @@ set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA "${CMAKE_CURRENT_SOURCE_DIR}/packaging/de
 
 set(CPACK_DEBIAN_FILE_NAME "DEB-DEFAULT")
 
+if(BUILD_ARM_V5)
+    set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "armel")
+elseif(BUILD_ARM_V6)
+    set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "armhf")
+endif()
+
 include(CPack)
diff --git a/packaging/rpm.cmake b/packaging/rpm.cmake
index acc57def3..ff7f25613 100644
--- a/packaging/rpm.cmake
+++ b/packaging/rpm.cmake
@@ -18,6 +18,10 @@ set(CPACK_RPM_PACKAGE_OBSOLETES "zerotier-one")
 set(CPACK_PACKAGE_RELOCATABLE FALSE)
 if(BUILD_32BIT)
     set(CPACK_RPM_PACKAGE_ARCHITECTURE "i386")
+elseif(BUILD_ARM_V5)
+    set(CPACK_RPM_PACKAGE_ARCHITECTURE "armel")
+elseif(BUILD_ARM_V6)
+    set(CPACK_RPM_PACKAGE_ARCHITECTURE "armhf")
 endif()
 
 set(CPACK_RPM_PRE_INSTALL_SCRIPT_FILE "${CMAKE_CURRENT_SOURCE_DIR}/packaging/rpm/rpm.pre")