From 962f29ba59b3b064d2e6e4d6274f4b4ff09a6412 Mon Sep 17 00:00:00 2001
From: Johannes Stoelp <johannes.stoelp@gmail.com>
Date: Fri, 5 Jul 2024 00:26:27 +0200
Subject: cross: mini cpp cross compile using zig compiler

---
 example-cross-compile-cpp/.gitignore |  7 +++++++
 example-cross-compile-cpp/Makefile   | 18 ++++++++++++++++++
 example-cross-compile-cpp/lin.cc     |  5 +++++
 example-cross-compile-cpp/win.cc     |  9 +++++++++
 example-cross-compile-cpp/windll.cc  |  5 +++++
 5 files changed, 44 insertions(+)
 create mode 100644 example-cross-compile-cpp/.gitignore
 create mode 100644 example-cross-compile-cpp/Makefile
 create mode 100644 example-cross-compile-cpp/lin.cc
 create mode 100644 example-cross-compile-cpp/win.cc
 create mode 100644 example-cross-compile-cpp/windll.cc

(limited to 'example-cross-compile-cpp')

diff --git a/example-cross-compile-cpp/.gitignore b/example-cross-compile-cpp/.gitignore
new file mode 100644
index 0000000..19794fc
--- /dev/null
+++ b/example-cross-compile-cpp/.gitignore
@@ -0,0 +1,7 @@
+*.lib
+*.dll
+*.exe
+*.exe.obj
+*.pdb
+*.elf
+*.elf.o
diff --git a/example-cross-compile-cpp/Makefile b/example-cross-compile-cpp/Makefile
new file mode 100644
index 0000000..6c7f234
--- /dev/null
+++ b/example-cross-compile-cpp/Makefile
@@ -0,0 +1,18 @@
+riscv64: lin-riscv64
+aarch64: lin-aarch64
+mips64el: lin-mips64el
+
+lin-%:
+	zig build-exe lin.cc -target $*-linux-musl -lc --name $*.elf
+	file $*.elf
+	qemu-$* $*.elf
+
+win:
+	zig build-lib -dynamic -target x86_64-windows -lc windll.cc
+	zig build-exe win.cc -target x86_64-windows -lc windll.lib
+	file win.exe windll.dll
+	wine win.exe
+
+clean:
+	git clean -fdx .
+
diff --git a/example-cross-compile-cpp/lin.cc b/example-cross-compile-cpp/lin.cc
new file mode 100644
index 0000000..5d70f91
--- /dev/null
+++ b/example-cross-compile-cpp/lin.cc
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+int main() {
+    puts("hello from cpp main()");
+}
diff --git a/example-cross-compile-cpp/win.cc b/example-cross-compile-cpp/win.cc
new file mode 100644
index 0000000..abb0f6d
--- /dev/null
+++ b/example-cross-compile-cpp/win.cc
@@ -0,0 +1,9 @@
+#include <windows.h>
+#include <winuser.h>
+
+__declspec(dllimport) void say(const char*);
+
+int main() {
+   say("hello dll");
+    MessageBoxA(nullptr, "world", "hello", 0);
+}
diff --git a/example-cross-compile-cpp/windll.cc b/example-cross-compile-cpp/windll.cc
new file mode 100644
index 0000000..890117c
--- /dev/null
+++ b/example-cross-compile-cpp/windll.cc
@@ -0,0 +1,5 @@
+#include <stdio.h>
+
+__declspec(dllexport) void say(const char* str) {
+  if (str) puts(str);
+}
-- 
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