Add go-to-rust via cgo. Dynamic and static variants.

go-to-rust-cgo-dynamic/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "go-to-rust"
+version = "0.1.0"
+authors = ["Voronkov Andrey <voronkovaa@gmail.com>"]
+
+[lib]
+name = "double_input"
+crate-type = ["dylib"]

go-to-rust-cgo-dynamic/Makefile

@@ -0,0 +1,14 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
+all: target/debug/libdouble_input.$(EXT)
+	go run src/double.go
+
+target/debug/libdouble_input.$(EXT): src/lib.rs Cargo.toml
+	cargo build
+
+clean:
+	rm -rf target

go-to-rust-cgo-dynamic/src/double.go

@@ -0,0 +1,15 @@
+package main
+
+//#cgo LDFLAGS: -L${SRCDIR}/../target/debug -Wl,-rpath=${SRCDIR}/../target/debug -ldouble_input -ldl
+//#include <stdint.h>
+//extern int32_t double_input(int32_t input);
+import "C"
+import (
+        "fmt"
+)
+
+func main() {
+    input  := 2
+    double := C.double_input(C.int32_t(input))
+    fmt.Printf("%d * 2 = %d\n", input, double)
+}

go-to-rust-cgo-dynamic/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern "C" fn double_input(input: i32) -> i32 {
+    input * 2
+}

go-to-rust-cgo-static/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "go-to-rust"
+version = "0.1.0"
+authors = ["Voronkov Andrey <voronkovaa@gmail.com>"]
+
+[lib]
+name = "double_input"
+crate-type = ["staticlib"]

go-to-rust-cgo-static/Makefile

@@ -0,0 +1,8 @@
+all: target/debug/libdouble_input.a
+	go run src/double.go
+
+target/debug/libdouble_input.a: src/lib.rs Cargo.toml
+	cargo build
+
+clean:
+	rm -rf target

go-to-rust-cgo-static/src/double.go

@@ -0,0 +1,15 @@
+package main
+
+//#cgo LDFLAGS: -L${SRCDIR}/../target/debug -ldouble_input -ldl
+//#include <stdint.h>
+//extern int32_t double_input(int32_t input);
+import "C"
+import (
+        "fmt"
+)
+
+func main() {
+    input  := 2
+    double := C.double_input(C.int32_t(input))
+    fmt.Printf("%d * 2 = %d\n", input, double)
+}

go-to-rust-cgo-static/src/lib.rs

@@ -0,0 +1,4 @@
+#[no_mangle]
+pub extern "C" fn double_input(input: i32) -> i32 {
+    input * 2
+}