initial commit - linking static lib to executable

cplusplus/cmake_ys/executable_staticlib/A/LibA/CMakeLists.txt

@@ -0,0 +1,15 @@
+
+
+add_library(LibA)
+target_sources(LibA
+ PRIVATE
+    func1.cxx
+
+ PUBLIC
+    FILE_SET HEADERS
+    FILES
+      func1.h
+ 
+
+)
+

cplusplus/cmake_ys/executable_staticlib/A/LibA/func1.cxx

@@ -0,0 +1,6 @@
+namespace LibA {
+double sqrt(double x)
+{
+  return -42;
+}
+}

cplusplus/cmake_ys/executable_staticlib/A/LibA/func1.h

@@ -0,0 +1,3 @@
+namespace LibA {
+double sqrt(double x);
+}