Allow cross-compiling plugins by setting CROSS_COMPILE environment variable to a machine triplet.

arch.mk

@@ -1,4 +1,8 @@
-MACHINE := $(shell $(CC) -dumpmachine)
+ifdef CROSS_COMPILE
+	MACHINE := $(CROSS_COMPILE)
+else
+	MACHINE ?= $(shell $(CC) -dumpmachine)
+endif
 
 ifneq (,$(findstring x86_64-,$(MACHINE)))
 	ARCH_X64 := 1

compile.mk

@@ -20,6 +20,12 @@ FLAGS += -Wall -Wextra -Wno-unused-parameter
 # C++ standard
 CXXFLAGS += -std=c++11
 
+# Define compiler/linker target if cross-compiling
+ifdef CROSS_COMPILE
+	FLAGS += --target=$(MACHINE)
+	LDFLAGS += --target=$(MACHINE)
+endif
+
 # Architecture-independent flags
 ifdef ARCH_X64
 	FLAGS += -DARCH_X64

dep.mk

@@ -10,6 +10,12 @@ DEP_FLAGS += -g -O3
 # Static libs don't usually compiled with -fPIC, but since we're including them in a shared library, it's needed.
 DEP_FLAGS += -fPIC
 
+# Define compiler/linker target if cross-compiling
+ifdef CROSS_COMPILE
+	DEP_FLAGS += --target=$(MACHINE)
+	DEP_LDFLAGS += --target=$(MACHINE)
+endif
+
 ifdef ARCH_X64
 	DEP_FLAGS += -march=nehalem
 endif