implement clang compatibility

.travis.yml

@@ -13,6 +13,7 @@ install:
 
 compiler:
   - gcc
+  - clang
 
 script:
   - make

Makefile

@@ -13,24 +13,23 @@ ALLLIB      = $(shell find $(SRC) -name '*.cpp' -not -path "$(SRCPARSER)/*") $(s
 ALLTEST     = $(shell find test/lib/ -name '*.cpp') $(shell find test/lib/ -name '*.h')
 
 # compile & link flages
-CC         = g++
 CFLAGS     = -std=c++11 -Wall -fPIC
 LIBFLAGS   = -shared
 TARGET     = libsqlparser.so
 INSTALL    = /usr/local
 
-CTESTFLAGS = -Wall -Isrc/ -Itest/ -L./ -std=c++11
+CTESTFLAGS = -Wall -Isrc/ -Itest/ -L./ -std=c++11 -lstdc++
 
 all: library
 
 library: $(TARGET)
 
 $(TARGET): $(LIBOBJ)
-	$(CC) $(LIBFLAGS) -o $(TARGET) $(LIBOBJ)
+	$(CXX) $(LIBFLAGS) -o $(TARGET) $(LIBOBJ)
 
 
 %.o: %.cpp $(PARSERFILES)
-	$(CC) $(CFLAGS) -c -o $@ $<
+	$(CXX) $(CFLAGS) -c -o $@ $<
 
 $(SRCPARSER)/bison_parser.cpp: parser
 $(SRCPARSER)/flex_lexer.cpp: parser
@@ -69,8 +68,8 @@ test_install:
 
 $(BIN)/sql_tests: library
 	@mkdir -p $(BIN)/
-	$(CC) $(CTESTFLAGS) $(TESTCPP) test/sql_tests.cpp -o $(BIN)/sql_tests -lsqlparser
+	$(CXX) $(CTESTFLAGS) $(TESTCPP) test/sql_tests.cpp -o $(BIN)/sql_tests -lsqlparser
 
 $(BIN)/sql_grammar_test: library
 	@mkdir -p $(BIN)/
-	$(CC) $(CTESTFLAGS) test/sql_grammar_test.cpp -o $(BIN)/sql_grammar_test -lsqlparser
+	$(CXX) $(CTESTFLAGS) test/sql_grammar_test.cpp -o $(BIN)/sql_grammar_test -lsqlparser

example/Makefile

@@ -1,7 +1,6 @@
 
-CC     = g++
-CFLAGS = -std=c++11 -Wall -I../src/ -L../
+CFLAGS = -std=c++11 -lstdc++ -Wall -I../src/ -L../
 
 all:
-	$(CC) $(CFLAGS) example.cpp -o example -lsqlparser
+	$(CXX) $(CFLAGS) example.cpp -o example -lsqlparser