Locating ll files flexibly using build config

So far the path to ll files used in unittests are hardcoded
so that we can only run them in the unittests directory of build
directory.

This patch fixes the hardcoded path (using config values) so that
we can run unittests from anywhere.

CMakeLists.txt

@@ -92,6 +92,10 @@ else()
   message(STATUS "Dynamic log disabled")
 endif()
 
+configure_file(config.h.in config.h @ONLY)
+include_directories(${CMAKE_BINARY_DIR})
+
+
 include_directories(
   ${PHASAR_SRC_DIR}/include
 )

config.h.in

@@ -0,0 +1,7 @@
+#ifndef __CONFIG_H__
+#define __CONFIG_H__
+
+#define PHASAR_SRC_DIR "@CMAKE_SOURCE_DIR@"
+#define PHASAR_BUILD_DIR "@CMAKE_BINARY_DIR@"
+
+#endif /* __CONFIG_H__  */

unittests/TestUtils/TestConfig.h

@@ -1,11 +1,13 @@
 #ifndef UNITTEST_TESTUTILS_TESTCONFIG_H_
 #define UNITTEST_TESTUTILS_TESTCONFIG_H_
 
+#include "config.h"
+
 #include <string>
 
 namespace psr::unittest {
 
-inline const std::string PathToLLTestFiles("../test/llvm_test_code/");
+inline const std::string PathToLLTestFiles(PHASAR_BUILD_DIR "/test/llvm_test_code/");
 
 } // namespace psr::unittest