Add cmake build system

Add cmake support for CLC and ll asm language,
the latter includes clang preprocessing stage.
Add ctests to check for external function calls.

v2: fix typos, style

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Acked-by: Aaron Watry <awatry@gmail.com>
Tested-by: Aaron Watry <awatry@gmail.com>
Acked-by: Vedran Miletić <vedran@miletic.net>
llvm-svn: 347667
diff --git a/libclc/libclc.pc.in b/libclc/libclc.pc.in
new file mode 100644
index 0000000..82e4e94
--- /dev/null
+++ b/libclc/libclc.pc.in
@@ -0,0 +1,8 @@
+includedir=@CMAKE_INSTALL_PREFIX@/include
+libexecdir=@CMAKE_INSTALL_PREFIX@/lib/clc
+
+Name: libclc
+Description: Library requirements of the OpenCL C programming language
+Version: @PROJECT_VERSION@
+Cflags: -I${includedir}
+Libs: -L${libexecdir}