Add libbcc.a compilation and test binary

This creates a new static library target for bcc. Add one trivial c test
case that links against it.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>

src/cc/CMakeLists.txt

@@ -32,8 +32,13 @@ if (CMAKE_COMPILER_IS_GNUCC)
   endif()
 endif()
 
-add_library(bcc SHARED bpf_common.cc bpf_module.cc libbpf.c perf_reader.c shared_table.cc exported_files.cc)
-set_target_properties(bcc PROPERTIES VERSION ${REVISION_LAST} SOVERSION 0)
+add_library(bcc-shared SHARED bpf_common.cc bpf_module.cc libbpf.c perf_reader.c shared_table.cc exported_files.cc)
+set_target_properties(bcc-shared PROPERTIES VERSION ${REVISION_LAST} SOVERSION 0)
+set_target_properties(bcc-shared PROPERTIES OUTPUT_NAME bcc)
+
+add_library(bcc-loader-static libbpf.c perf_reader.c)
+add_library(bcc-static STATIC bpf_common.cc bpf_module.cc shared_table.cc exported_files.cc)
+set_target_properties(bcc-static PROPERTIES OUTPUT_NAME bcc)
 
 # BPF is still experimental otherwise it should be available
 #llvm_map_components_to_libnames(llvm_libs bpf mcjit irreader passes)
@@ -45,9 +50,10 @@ set(clang_libs ${libclangFrontend} ${libclangSerialization} ${libclangDriver} ${
   ${libclangAST} ${libclangLex} ${libclangBasic})
 
 # Link against LLVM libraries
-target_link_libraries(bcc b_frontend clang_frontend ${clang_libs} ${llvm_libs} LLVMBPFCodeGen)
+target_link_libraries(bcc-shared b_frontend clang_frontend ${clang_libs} ${llvm_libs} LLVMBPFCodeGen)
+target_link_libraries(bcc-static b_frontend clang_frontend bcc-loader-static ${clang_libs} ${llvm_libs} LLVMBPFCodeGen)
 
-install(TARGETS bcc LIBRARY COMPONENT libbcc
+install(TARGETS bcc-shared LIBRARY COMPONENT libbcc
   DESTINATION ${CMAKE_INSTALL_LIBDIR})
 install(FILES bpf_common.h bpf_module.h ../libbpf.h COMPONENT libbcc
   DESTINATION include/bcc)

tests/cc/CMakeLists.txt

 # Copyright (c) PLUMgrid, Inc.
 # Licensed under the Apache License, Version 2.0 (the "License")
 
+include_directories(${CMAKE_SOURCE_DIR}/src/cc)
+
+add_executable(test_static test_static.c)
+target_link_libraries(test_static bcc-static)
+
+add_test(NAME c_test_static COMMAND ${TEST_WRAPPER} c_test_static sudo ${CMAKE_CURRENT_BINARY_DIR}/test_static)

tests/cc/test_static.c

+#include "bpf_common.h"
+
+int main(int argc, char **argv) {
+  void *mod = bpf_module_create_c_from_string("BPF_TABLE(\"array\", int, int, stats, 10);\n", 4, NULL, 0);
+  return !(mod != NULL);
+}