Fail if llvm can not be found

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0cef065e80833086e1c993bd0cb834bdf85b332e..0eab70c64b330ce261acdbb5cb9051c02c3084dd 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,9 +14,15 @@ pkg_check_modules(LOG4CXX REQUIRED liblog4cxx)
 #add_compile_options(${LOG4CXX_CFLAGS})
 add_definitions(${LOG4CXX_CFLAGS})
 
-execute_process(COMMAND llvm-config-3.5 --cxxflags OUTPUT_VARIABLE LLVM_CFLAGS  OUTPUT_STRIP_TRAILING_WHITESPACE)
-execute_process(COMMAND llvm-config-3.5 --ldflags  OUTPUT_VARIABLE LLVM_LDFLAGS OUTPUT_STRIP_TRAILING_WHITESPACE)
-execute_process(COMMAND llvm-config-3.5 --libs     OUTPUT_VARIABLE LLVM_LIBS    OUTPUT_STRIP_TRAILING_WHITESPACE)
+find_program(LLVM_CONFIG llvm-config-3.5)
+
+if(NOT LLVM_CONFIG)
+  message(FATAL_ERROR "LLVM not found")
+endif()
+
+execute_process(COMMAND ${LLVM_CONFIG} --cxxflags OUTPUT_VARIABLE LLVM_CFLAGS  OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND ${LLVM_CONFIG} --ldflags  OUTPUT_VARIABLE LLVM_LDFLAGS OUTPUT_STRIP_TRAILING_WHITESPACE)
+execute_process(COMMAND ${LLVM_CONFIG} --libs     OUTPUT_VARIABLE LLVM_LIBS    OUTPUT_STRIP_TRAILING_WHITESPACE)
 
 separate_arguments(LLVM_CFLAGS)
 add_definitions(${LLVM_CFLAGS})