test: duplicate c functions

Author: Hoblovski

testdata/cduplicate/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.0)
+project(my_combined_project)
+
+add_subdirectory(d1)
+
+add_subdirectory(d2)

testdata/cduplicate/d1/CMakeLists.txt

@@ -0,0 +1 @@
+add_executable(prog1 ../main.c add.c)

testdata/cduplicate/d1/add.c

@@ -0,0 +1 @@
+int add(int a){return a+1;}

testdata/cduplicate/d2/CMakeLists.txt

@@ -0,0 +1 @@
+add_executable(prog2 ../main.c add.c)

testdata/cduplicate/d2/add.c

@@ -0,0 +1 @@
+int add(int a){return a+1;}

testdata/cduplicate/main.c

@@ -0,0 +1 @@
+extern int add(int); int main(int argc,char**argv){return add(argc);}