CMake static library example added.

c/cmake_static_lib/CMakeLists.txt

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+cmake_minimum_required (VERSION 2.6)
+project (HELLO)
+
+add_subdirectory (libmean)
+add_subdirectory (test)

c/cmake_static_lib/libmean/CMakeLists.txt

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+add_library (libmean mean.c)

c/cmake_static_lib/libmean/mean.c

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+//#include <stdio.h>
+
+double mean(double a, double b) {
+  return (a+b) / 2;
+}

c/cmake_static_lib/libmean/mean.h

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+double mean(double, double);

c/cmake_static_lib/test/CMakeLists.txt

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+include_directories (${HELLO_SOURCE_DIR}/libmean)
+
+link_directories (${HELLO_BINARY_DIR}/libmean)
+
+add_executable (helloDemo main)
+
+target_link_libraries (helloDemo libmean)

c/cmake_static_lib/test/main.c

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+#include <stdio.h>
+#include "mean.h"
+
+int main(int argc, char* argv[]) {
+
+  double v1, v2, m;
+  v1 = 5.2;
+  v2 = 7.9;
+
+  m  = mean(v1, v2);
+
+  printf("The mean of %3.2f and %3.2f is %3.2f\n", v1, v2, m);
+
+  return 0;
+}