[問題] maple在redhat7.3上

[HEC (機殼電源專賣)]

    我在/home/bbs/src/lib目錄裡，執行 make 出現下面情形

gcc -O2 -s -pipe -fomit-frame-pointer -Wunused -I../include -c f_map.c
f_map.c: In function `f_map':
f_map.c:31: `NULL' undeclared (first use in this function)
f_map.c:31: (Each undeclared identifier is reported only once
f_map.c:31: for each function it appears in.)
make: *** [f_map.o] Error 1
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 114.40.126.34
→ dendrobium:NULL沒宣告 暴力法: f_map.c加#define NULL 0
推 Lavchi:123
→ Lavchi:1test_1
→ Lavchi:test_2
→ Lavchi:test_3