下面这个Compiler claims to be ANSI C level 1是什么意思？

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下面这个Compiler claims to be ANSI C level 1是什么意思？
ANSI C level 1的数据长度必须符合如下规范吗？
char必须要是8位？int必须要是32位？
感觉像是VC6的标准？
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Compiler claims to be ANSI C level 1

Compiler names are at least 64 chars long
Preprocessor names are at least 64 long

SIZES
char = 8 bits, signed
short=16 int=32 long=32 float=32 double=64 bits
long double=128 bits
char*=32 bits
int* =32 bits
func*=32 bits
Type size_t is unsigned int/long
Type wchar_t is signed int/long

ALIGNMENTS
char=1 short=2 int=4 long=4
float=4 double=8
long double=8
char*=4 int*=4 func*=4

CHARACTER ORDER
short: AB
int: ABCD
long: ABCD

PROPERTIES OF POINTERS
Char and int pointer formats seem identical
Char and function pointer formats seem identical
Strings are shared
Type ptrdiff_t is signed int/long
Dereferencing NULL causes a trap

PROPERTIES OF INTEGRAL TYPES
Overflow of a short does not generate a trap
Maximum short = 32767 (= 2**15-1)
Minimum short = -32768
Overflow of an int does not generate a trap
Maximum int = 2147483647 (= 2**31-1)
Minimum int = -2147483648
Overflow of a long does not generate a trap
Maximum long = 2147483647 (= 2**31-1)
Minimum long = -2147483648
Maximum unsigned short = 65535
Maximum unsigned int = 4294967295
Maximum unsigned long = 4294967295

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