Merge pull request #242 from PunishedSnakePr/CMake-Extension

Added CMake compile definitions

CMakeLists.txt

@@ -9,6 +9,7 @@ SET(LIBUCL_VERSION
  "${LIBUCL_VERSION_MAJOR}.${LIBUCL_VERSION_MINOR}.${LIBUCL_VERSION_PATCH}")
 
 INCLUDE(CheckCCompilerFlag)
+INCLUDE(CheckCSourceCompiles)
 INCLUDE(FindOpenSSL)
 INCLUDE(GNUInstallDirs)
 
@@ -159,6 +160,25 @@ IF(ENABLE_URL_INCLUDE MATCHES "ON")
  ENDIF(LIBFETCH_LIBRARY)
 ENDIF(ENABLE_URL_INCLUDE MATCHES "ON")
 
+set(SYNC_BUILTINS_TEST_SOURCE [====[
+int main()
+{
+ unsigned long val;
+
+ __sync_bool_compare_and_swap(&val, 0, 1);
+ __sync_add_and_fetch(&val, 1);
+ __sync_fetch_and_add(&val, 0);
+ __sync_sub_and_fetch(&val, 1);
+
+ return 0;
+}
+]====])
+
+CHECK_C_SOURCE_COMPILES("${SYNC_BUILTINS_TEST_SOURCE}" HAVE_ATOMIC_BUILTINS)
+IF(NOT HAVE_ATOMIC_BUILTINS)
+ MESSAGE(WARNING "Libucl references could be thread-unsafe because atomic builtins are missing")
+ENDIF(NOT HAVE_ATOMIC_BUILTINS)
+
 SET(CMAKE_C_WARN_FLAGS "")
 CHECK_C_COMPILER_FLAG(-W SUPPORT_W)
 CHECK_C_COMPILER_FLAG(-Wno-pointer-sign SUPPORT_WPOINTER_SIGN)
@@ -182,6 +202,20 @@ IF(ENABLE_URL_SIGN MATCHES "ON")
  ENDIF(OPENSSL_FOUND)
 ENDIF(ENABLE_URL_SIGN MATCHES "ON")
 
+SET(UCL_COMPILE_DEFS)
+IF(HAVE_FETCH_H)
+ LIST(APPEND UCL_COMPILE_DEFS -DHAVE_FETCH_H=1)
+ENDIF(HAVE_FETCH_H)
+IF(CURL_FOUND)
+ LIST(APPEND UCL_COMPILE_DEFS -DCURL_FOUND=1)
+ENDIF(CURL_FOUND)
+IF(HAVE_OPENSSL)
+ LIST(APPEND UCL_COMPILE_DEFS -DHAVE_OPENSSL=1)
+ENDIF(HAVE_OPENSSL)
+IF(HAVE_ATOMIC_BUILTINS)
+ LIST(APPEND UCL_COMPILE_DEFS -DHAVE_ATOMIC_BUILTINS=1)
+ENDIF(HAVE_ATOMIC_BUILTINS)
+
 SET(UCLSRC src/ucl_util.c
  src/ucl_parser.c
  src/ucl_emitter.c
@@ -209,6 +243,10 @@ TARGET_INCLUDE_DIRECTORIES(ucl
  src
  uthash
  klib)
+TARGET_COMPILE_DEFINITIONS(ucl
+ PRIVATE
+ ${UCL_COMPILE_DEFS}
+)
 
 IF(ENABLE_LUA MATCHES "ON")
  IF(ENABLE_LUAJIT MATCHES "ON")