From 2eea177013a817542a31425c280ca0c9d5c8d276 Mon Sep 17 00:00:00 2001
From: Ramakrishnan Muthukrishnan <ram@rkrishnan.org>
Date: Wed, 9 Aug 2023 22:44:45 +0530
Subject: [PATCH] Makefile: possibility to add the rust library as a
 cdynlib/header

---
 .gitignore      |  2 +-
 Makefile        | 16 ++++++++++++----
 rust/Cargo.toml | 12 ++++++++++++
 rust/src/lib.rs | 17 +++++++++++++++++
 4 files changed, 42 insertions(+), 5 deletions(-)
 create mode 100644 rust/Cargo.toml
 create mode 100644 rust/src/lib.rs

diff --git a/.gitignore b/.gitignore
index 3166f93..b5e7b33 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
 *.o
 pihpsdr
 .vscode
-rust/*
+rust/target/*
diff --git a/Makefile b/Makefile
index f7c1163..522c11e 100644
--- a/Makefile
+++ b/Makefile
@@ -174,8 +174,11 @@ ifeq ($(UNAME_S), Linux)
 RT_OPTION=-lrt
 endif
 
-LIBS=$(RT_OPTION) -lfftw3 -lm -lwdsp -lpthread $(AUDIO_LIBS) $(USBOZY_LIBS) $(GTKLIBS) $(GPIO_LIBS) $(MIDI_LIBS)
-INCLUDES=$(GTKINCLUDES)
+RUST_LIB=-Lrust/target/debug -lhpsdr
+RUST_INCLUDES=-Irust/target/debug
+
+LIBS=$(RT_OPTION) -lfftw3 -lm -lwdsp -lpthread $(AUDIO_LIBS) $(USBOZY_LIBS) $(GTKLIBS) $(GPIO_LIBS) $(MIDI_LIBS) $(RUST_LIB)
+INCLUDES=$(GTKINCLUDES) $(RUST_INCLUDES)
 
 COMPILE=$(CC) $(CFLAGS) $(OPTIONS) $(INCLUDES)
 
@@ -419,10 +422,11 @@ toolbar_menu.o
 
 $(PROGRAM):  $(OBJS) $(AUDIO_OBJS) $(REMOTE_OBJS) $(USBOZY_OBJS) \
 		$(LOCALCW_OBJS) $(PURESIGNAL_OBJS) \
-		$(MIDI_OBJS) $(SERVER_OBJS)
+		$(MIDI_OBJS) $(SERVER_OBJS) \
+		libhpsdr
 	$(LINK) -o $(PROGRAM) $(OBJS) $(AUDIO_OBJS) $(REMOTE_OBJS) $(USBOZY_OBJS) \
 		$(LOCALCW_OBJS) $(PURESIGNAL_OBJS) \
-		$(MIDI_OBJS) $(SERVER_OBJS) $(LIBS)
+		$(MIDI_OBJS) $(SERVER_OBJS) $(LIBS)		
 
 .PHONY:	all
 all:	prebuild  $(PROGRAM) $(HEADERS) $(AUDIO_HEADERS) $(USBOZY_HEADERS) \
@@ -506,6 +510,10 @@ newhpsdrsim.o:	newhpsdrsim.c hpsdrsim.h
 hpsdrsim:	hpsdrsim.o newhpsdrsim.o
 	$(LINK) -o hpsdrsim hpsdrsim.o newhpsdrsim.o -lasound -lm -lpthread
 
+libhpsdr:
+	cd rust && \
+	cargo build && \
+	cd ..
 
 debian:
 	cp $(PROGRAM) pkg/pihpsdr/usr/local/bin
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
new file mode 100644
index 0000000..48363f2
--- /dev/null
+++ b/rust/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "hpsdr"
+version = "0.1.0"
+edition = "2021"
+authors = ["Ramakrishnan Muthukrishnan <ram@rkrishnan.org>"]
+
+[dependencies]
+libc = "0.2"
+
+[lib]
+name = "hpsdr"
+crate-type = ["staticlib"]
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
new file mode 100644
index 0000000..5d7f64a
--- /dev/null
+++ b/rust/src/lib.rs
@@ -0,0 +1,17 @@
+use libc::{size_t};
+
+#[no_mangle]
+pub extern fn add(left: size_t, right: size_t) -> size_t {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}
-- 
2.45.2