From 75f90aa95e3da44cc19c133c857c181f118febf9 Mon Sep 17 00:00:00 2001
From: Andrew Belt <andrewpbelt@gmail.com>
Date: Mon, 28 Nov 2022 17:57:17 -0500
Subject: [PATCH] Allow cross-compiling plugins by setting CROSS_COMPILE
 environment variable to a machine triplet.

---
 arch.mk    | 6 +++++-
 compile.mk | 6 ++++++
 dep.mk     | 6 ++++++
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/arch.mk b/arch.mk
index a93cb92e..a2a75a34 100644
--- a/arch.mk
+++ b/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
diff --git a/compile.mk b/compile.mk
index b72fd683..011b4363 100644
--- a/compile.mk
+++ b/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
diff --git a/dep.mk b/dep.mk
index 7db35fb5..41fe5896 100644
--- a/dep.mk
+++ b/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