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我想獲得一些代碼來編譯,試圖在nameser_compat.h頭文件中使用一些定義。如果設置了一些BIND兼容性,這個文件顯然包含在nameser.h中。什麼是nameser_compat.h,爲什麼不包含它?
我試着在OSX上編譯,顯然這個值沒有設置,因爲它沒有拉入文件。我應該手動將nameser_compat.h導入到我的代碼中添加到nameser.h中嗎?
我想獲得一些代碼來編譯,試圖在nameser_compat.h頭文件中使用一些定義。如果設置了一些BIND兼容性,這個文件顯然包含在nameser.h中。什麼是nameser_compat.h,爲什麼不包含它?
我試着在OSX上編譯,顯然這個值沒有設置,因爲它沒有拉入文件。我應該手動將nameser_compat.h導入到我的代碼中添加到nameser.h中嗎?
在我的Mac OS X 10.7.4的機器,我可以找到三個相關文件看:
/usr/include/arpa/nameser.h
/usr/include/arpa/nameser_compat.h
/usr/include/nameser.h
我把這個簡單的一段代碼(在文件xx.c
):
#include <nameser.h>
int main(void) { return 0; }
並編譯它像這樣獲得輸出顯示:
$ /usr/bin/gcc -O3 -g -std=c99 -Wall -Wextra -DBIND_8_COMPAT -H -c xx.c
. /usr/include/nameser.h
.. /usr/include/arpa/nameser_compat.h
... /usr/include/machine/endian.h
.... /usr/include/i386/endian.h
..... /usr/include/sys/cdefs.h
...... /usr/include/sys/_symbol_aliasing.h
...... /usr/include/sys/_posix_availability.h
..... /usr/include/sys/_endian.h
...... /usr/include/libkern/_OSByteOrder.h
....... /usr/include/sys/_types.h
........ /usr/include/machine/_types.h
......... /usr/include/i386/_types.h
....... /usr/include/libkern/i386/_OSByteOrder.h
.. /usr/include/sys/param.h
... /usr/include/sys/types.h
.... /usr/include/sys/appleapiopts.h
.... /usr/include/machine/types.h
..... /usr/include/i386/types.h
...... /usr/include/i386/_types.h
.... /usr/include/sys/_structs.h
... /usr/include/sys/syslimits.h
... /usr/include/machine/param.h
.... /usr/include/i386/param.h
..... /usr/include/i386/_param.h
... /usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin11/4.2.1/include/limits.h
.... /usr/llvm-gcc-4.2/bin/../lib/gcc/i686-apple-darwin11/4.2.1/include/syslimits.h
.... /Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/include/limits.h
..... /Applications/Xcode.app/Contents/Developer/usr/llvm-gcc-4.2/lib/gcc/i686-apple-darwin11/4.2.1/include/syslimits.h
..... /usr/include/limits.h
...... /usr/include/machine/limits.h
....... /usr/include/i386/limits.h
........ /usr/include/i386/_limits.h
... /usr/include/sys/signal.h
.... /usr/include/machine/signal.h
..... /usr/include/i386/signal.h
...... /usr/include/i386/_structs.h
.... /usr/include/sys/_structs.h
..... /usr/include/machine/_structs.h
...... /usr/include/i386/_structs.h
....... /usr/include/mach/i386/_structs.h
Multiple include guards may be useful for:
/usr/include/sys/_symbol_aliasing.h
$
這表明與包含集合,nameser_compat.h
標題。源代碼顯示,可以預期:
#ifndef _NAMESER_9_H_
#define _NAMESER_9_H_
#ifdef BIND_8_COMPAT
#include <arpa/nameser_compat.h>
#endif
,看看是否真的包含它,你需要調用GCC與-E,其中預處理後停止編譯。 – alinsoar 2012-07-14 00:09:24