Add CMath library + ensure it builds, links, and runs

Package.swift

@@ -17,15 +17,30 @@ let package = Package(
             name: "PMCalc",
             dependencies: [
                 .product(name: "Adwaita", package: "adwaita-swift"),
-                .product(name: "Localized", package: "localized")
+                .product(name: "Localized", package: "localized"),
+                "CMath"
             ],
-            path: "Sources",
+            path: "Sources/PMCalc",
             resources: [
                 .process("Localized.yml")
             ],
+            cSettings: [
+                .headerSearchPath("Sources/CMath/include")
+            ],
+            linkerSettings: [
+                .unsafeFlags([
+                    "-L./Sources/CMath/lib/",
+                    "-lcmath"
+                ])
+            ],
             plugins: [
                 .plugin(name: "GenerateLocalized", package: "localized")
             ]
+        ),
+        .systemLibrary(
+            name: "CMath",
+            path: "Sources/CMath",
+            providers: []
         )
     ],
     swiftLanguageModes: [.v5]

Sources/CMath/include/add_nums.h

@@ -0,0 +1,13 @@
+//
+//  add_nums.h
+//  CMath
+//
+//  Created by TheAlgorithm476 on 28/03/2025.
+//
+
+#ifndef __ADD_NUMS_H
+#define __ADD_NUMS_H
+
+double add_nums(double a, double b);
+
+#endif // __ADD_NUMS_H

Sources/CMath/include/div_nums.h

@@ -0,0 +1,13 @@
+//
+//  div_nums.h
+//  CMath
+//
+//  Created by TheAlgorithm476 on 28/03/2025.
+//
+
+#ifndef __DIV_NUMS_H
+#define __DIV_NUMS_H
+
+double div_nums(double a, double b);
+
+#endif // __DIV_NUMS_H

Sources/CMath/include/mul_nums.h

@@ -0,0 +1,13 @@
+//
+//  mul_nums.h
+//  CMath
+//
+//  Created by TheAlgorithm476 on 28/03/2025.
+//
+
+#ifndef __MUL_NUMS_H
+#define __MUL_NUMS_H
+
+double mul_nums(double a, double b);
+
+#endif // __MUL_NUMS_H

Sources/CMath/include/spc_nums.h

@@ -0,0 +1,17 @@
+//
+//  spc_nums.h
+//  CMath
+//
+//  Created by TheAlgorithm476 on 28/03/2025.
+//
+
+#ifndef __SPC_NUMS_H
+#define __SPC_NUMS_H
+
+#define POOR_MANS_POW_GUESSES 12
+#define NEWTONIAN_DIV_GUESSES 12
+
+double pow(double x, double exp);
+double sqrt(double x);
+
+#endif // __SPC_NUMS_H

Sources/CMath/include/sub_nums.h

@@ -0,0 +1,13 @@
+//
+//  sub_nums.h
+//  CMath
+//
+//  Created by TheAlgorithm476 on 28/03/2025.
+//
+
+#ifndef __SUB_NUMS_H
+#define __SUB_NUMS_H
+
+double sub_nums(double a, double b);
+
+#endif // __SUB_NUMS_H

Sources/CMath/module.modulemap

@@ -0,0 +1,9 @@
+module CMath {
+    header "include/add_nums.h"
+    header "include/sub_nums.h"
+    header "include/mul_nums.h"
+    header "include/div_nums.h"
+    header "include/spc_nums.h"
+    export *
+    link "cmath"
+}

Sources/PMCalc/PMCalc.swift

@@ -2,6 +2,7 @@
 // https://docs.swift.org/swift-book
 
 import Adwaita
+import CMath
 
 @main
 struct PMCalc: App {

me.thealgorithm476.PMCalc.PMCalc.json

@@ -46,7 +46,8 @@
         "install -Dm644 data/me.thealgorithm476.PMCalc.PMCalc.metainfo.xml $DESTDIR/app/share/metainfo/me.thealgorithm476.PMCalc.PMCalc.metainfo.xml",
         "install -Dm644 data/me.thealgorithm476.PMCalc.PMCalc.desktop $DESTDIR/app/share/applications/me.thealgorithm476.PMCalc.PMCalc.desktop",
         "install -Dm644 data/icons/me.thealgorithm476.PMCalc.PMCalc.svg $DESTDIR/app/share/icons/hicolor/scalable/apps/me.thealgorithm476.PMCalc.PMCalc.svg",
-        "install -Dm644 data/icons/me.thealgorithm476.PMCalc.PMCalc-symbolic.svg $DESTDIR/app/share/icons/hicolor/symbolic/apps/me.thealgorithm476.PMCalc.PMCalc-symbolic.svg"
+        "install -Dm644 data/icons/me.thealgorithm476.PMCalc.PMCalc-symbolic.svg $DESTDIR/app/share/icons/hicolor/symbolic/apps/me.thealgorithm476.PMCalc.PMCalc-symbolic.svg",
+        "install -Dm644 Sources/CMath/lib/libcmath.so /app/lib/libcmath.so"
       ]
     }
   ]