diff --git a/c/README.md b/c/README.md
index 0c3b361..44944ff 100644
--- a/c/README.md
+++ b/c/README.md
@@ -119,5 +119,5 @@
         1. [C++ templates](template_cpp.c)
     1.  [String to int](string_to_int.c)
     1.  [User input](interactive/user_input.c.off)
-    1.  [Virtual memory](virtual_memory.c)
+    1.  [Memory layout](memory_layout.c)
     1.  [Profiling](interactive/profiling.c)
diff --git a/c/virtual_memory.c b/c/memory_layout.c
similarity index 95%
rename from c/virtual_memory.c
rename to c/memory_layout.c
index 7982b94..1f5905d 100644
--- a/c/virtual_memory.c
+++ b/c/memory_layout.c
@@ -30,7 +30,7 @@ int main(int argc, char **argv) {
     printf("  &heap       = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)heap);
     printf("  &bss        = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)&bss);
     printf("  &data       = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)&data);
-    printf("  &str main   = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)&main);
+    printf("  &main       = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)&main);
     printf("  &str char*  = %0*" PRIxPTR "\n", PRIxPTR_WIDTH, (uintptr_t)&str);
 
     free(heap);
diff --git a/cmake/README.md b/cmake/README.md
index 6afe9a9..fd5fa09 100644
--- a/cmake/README.md
+++ b/cmake/README.md
@@ -1,5 +1,8 @@
 # CMake
 
+Good examples: <https://github.com/ttroy50/cmake-examples>
+
+1. [multi_executable](multi_executable/)
 1. [shared_lib_external](shared_lib_external/)
 
 Make alternative that aims to be portable.
diff --git a/cmake/multi_executable/CMakeLists.txt b/cmake/multi_executable/CMakeLists.txt
new file mode 100644
index 0000000..b35795e
--- /dev/null
+++ b/cmake/multi_executable/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.0)
+file(GLOB APP_SOURCES RELATIVE ${CMAKE_SOURCE_DIR} "*.c")
+message("${APP_SOURCES}")
+foreach(testsourcefile ${APP_SOURCES})
+    string(REPLACE ".c" "" testname ${testsourcefile})
+    add_executable(${testname} ${testsourcefile})
+endforeach(testsourcefile ${APP_SOURCES})
diff --git a/cmake/multi_executable/a.c b/cmake/multi_executable/a.c
new file mode 100644
index 0000000..113b2ea
--- /dev/null
+++ b/cmake/multi_executable/a.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+	puts(__FILE__);
+    return EXIT_SUCCESS;
+}
diff --git a/cmake/multi_executable/b.c b/cmake/multi_executable/b.c
new file mode 100644
index 0000000..113b2ea
--- /dev/null
+++ b/cmake/multi_executable/b.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+	puts(__FILE__);
+    return EXIT_SUCCESS;
+}
diff --git a/cmake/shared_lib_external/CMakeLists.txt b/cmake/shared_lib_external/CMakeLists.txt
index 3edd1b6..72dcef3 100644
--- a/cmake/shared_lib_external/CMakeLists.txt
+++ b/cmake/shared_lib_external/CMakeLists.txt
@@ -1,3 +1,4 @@
+# sudo apt-get install libgsl-dev
 cmake_minimum_required(VERSION 2.8)
 add_executable(main main.c)
 target_link_libraries(main gsl gslcblas)