Remove default compiler flag

Author: tyfkda

Makefile

@@ -36,7 +36,7 @@ CC1_BE_DIR:=$(CC1_DIR)/backend
 OPTIMIZE:=-O2 -g3
 CFLAGS:=-ansi -std=c11 -pedantic -MMD -Wall -Wextra -Werror -Wold-style-definition \
 	-Wno-missing-field-initializers -Wno-empty-body \
-	-D_DEFAULT_SOURCE $(OPTIMIZE) -I$(UTIL_DIR)
+	$(OPTIMIZE) -I$(UTIL_DIR)
 ifneq ("$(NO_FLONUM)","")
 CFLAGS+=-D__NO_FLONUM
 endif

tests/Makefile

@@ -12,7 +12,6 @@ CFLAGS:=-ansi -std=c11 -Wall -Wextra -Werror \
 	-Wno-empty-body
 CFLAGS+=-Wno-char-subscripts  # for RISC-V, suppress error on isXXXX(char)
 CFLAGS+=-I$(CC1_FE_DIR) -I$(UTIL_DIR)
-CFLAGS+=-D_POSIX_C_SOURCE=200809L  # for getline
 
 PREFIX:=
 XCC:=../$(PREFIX)xcc
@@ -115,7 +114,7 @@ INITIALIZER_SRCS:=initializer_test.c $(CC1_FE_DIR)/parser.c $(CC1_FE_DIR)/parser
 	$(UTIL_DIR)/util.c $(UTIL_DIR)/table.c \
 	$(DEBUG_DIR)/dump_expr.c
 initializer_test:	$(INITIALIZER_SRCS)
-	$(CC) -o$@ -DNO_MAIN_DUMP_EXPR $(CFLAGS) $^
+	$(CC) -o$@ -DNO_MAIN_DUMP_EXPR -D_DEFAULT_SOURCE $(CFLAGS) $^
 
 TABLE_SRCS:=table_test.c $(UTIL_DIR)/table.c
 table_test:	$(TABLE_SRCS)
@@ -130,7 +129,7 @@ PARSER_SRCS:=parser_test.c $(CC1_FE_DIR)/parser_expr.c $(CC1_FE_DIR)/parser.c \
 	$(CC1_FE_DIR)/initializer.c $(CC1_FE_DIR)/fe_misc.c $(CC1_FE_DIR)/type.c $(CC1_FE_DIR)/ast.c \
 	$(UTIL_DIR)/util.c $(UTIL_DIR)/table.c
 parser_test:	$(PARSER_SRCS)
-	$(CC) -o$@ $(CFLAGS) $^
+	$(CC) -o$@ $(CFLAGS) -D_DEFAULT_SOURCE $^
 
 VAL_SRCS:=valtest.c
 valtest:	$(VAL_SRCS) # $(XCC)
@@ -144,7 +143,7 @@ fvaltest:	$(FVAL_SRCS) flotest.inc # $(XCC)
 
 TYPE_SRCS:=print_type_test.c $(CC1_FE_DIR)/type.c $(UTIL_DIR)/util.c $(UTIL_DIR)/table.c
 print_type_test:	$(TYPE_SRCS)
-	$(CC) -o $@ $(CFLAGS) $^
+	$(CC) -o $@ $(CFLAGS) -D_DEFAULT_SOURCE $^
 
 link_test: link_main.c link_sub.c
 	$(XCC) -c -fcommon -olink_main.o -Wall -Werror link_main.c