Valgrind的不顯示行數

Question

我已經加入了-g選項生成文件是這樣的：

CFLAGS=-Wall -g 

all: 
     cc hello.c -o hello 
     cc badprog.c -o badprog 

當我編譯使用make：

cc hello.c -o hello 
cc badprog.c -o badprog 

我沒有看到-g選擇這裏。爲valgrind --track-origins=yes ./badprog結果是這樣的：

==14412== Conditional jump or move depends on uninitialised value(s) 
==14412== at 0x4E7D665: _itoa_word (_itoa.c:179) 
==14412== by 0x4E81B91: vfprintf (vfprintf.c:1654) 
==14412== by 0x4E880A8: printf (printf.c:34) 
==14412== by 0x400564: main (in /home/anr/Desktop/c programming/badprog) 
==14412== Uninitialised value was created by a stack allocation 
==14412== at 0x40052C: main (in /home/anr/Desktop/c programming/badprog) 

Answer 1

因爲CFLAGS沒有參考在編譯命令中編譯。修改你的Makefile爲：

CFLAGS=-Wall -g 

all: 
     cc hello.c $(CFLAGS) -o hello 
     cc badprog.c $(CFLAGS) -o badprog