Create demo with compile-time linking

build.sh

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+#!/bin/sh
+CFLAGS="-std=c11 -pedantic -Wall -Wextra"
+mkdir -p build
+clang $CFLAGS -fPIC -shared mod.c -o build/libmod.so
+clang $CFLAGS -Lbuild -lmod main.c -o build/demo

main.c

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+/*
+ * Copyright (c) Camden Dixie O'Brien
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+#define _POSIX_C_SOURCE 199309L
+
+#include "mod.h"
+
+#include <stdio.h>
+#include <time.h>
+
+int main(void)
+{
+	const struct timespec pause = { .tv_nsec = 16666667 };
+	while (1) {
+		printf("\33[2K\r%s", getmsg());
+		fflush(stdout);
+		nanosleep(&pause, NULL);
+	}
+	return 0;
+}

mod.c

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+/*
+ * Copyright (c) Camden Dixie O'Brien
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+#include "mod.h"
+
+const char *getmsg(void)
+{
+	return "hi";
+}

mod.h

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+/*
+ * Copyright (c) Camden Dixie O'Brien
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+#ifndef MOD_H
+#define MOD_H
+
+const char *getmsg(void);
+
+#endif