AC_AUTO_INCLUDE_HEADERS (HEADER-FILE, INCLUDE-FILE ...)
, 

2002年03月04日

Scott Pakin <pakin@uiuc.edu>

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Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Installed Packages (released)

Given a HEADER-FILE and a space-separated list of INCLUDE-FILEs, AC_AUTO_INCLUDE_HEADERS will append to HEADER-FILE a conditional #include for each INCLUDE-FILE. For instance, the following macro call:

 AC_AUTO_INCLUDE_HEADERS([config-inc.h], [sys/foobar.h])

will append the following text to config-inc.h:

 #ifdef HAVE_SYS_FOOBAR_H
 # include <sys/foobar.h>
 #endif

AC_AUTO_INCLUDE_HEADERS makes it easy to auto-generate a single header file that can then be #include'd by multiple files in a project. Because the #ifdef's are appended to HEADER-FILE, it's also convenient to include additional text in that file. For instance:

 cat <<\CIH_EOF > config-inc.h
 /* This file was generated automatically by configure. */

 #ifndef _CONFIG_INC_H_
 #define _CONFIG_INC_H_

 #include <stdio.h>

 CIH_EOF
 AC_AUTO_INCLUDE_HEADERS([config-inc.h], [arpa/inet.h dlfcn.h errno.h])
 echo "#endif" >> config-inc.h

Here's an easy way to get a complete list of header files from config.h:

 cat config.h | perl -ane '/ HAVE_\S+_H / && do {$_=$F[$#F-1]; s/^HAVE_//; s/_H/.h/; s|_|/|g; tr/A-Z/a-z/; print "$_ "}'

You can then manually edit the resulting list.

AC_DEFUN([AC_AUTO_INCLUDE_HEADERS],
[touch 1ドル
for ac_auto_include_file in 2ドル; do
 ac_auto_include_have=`echo $ac_auto_include_file | sed 'y%./*abcdefghijklmnopqrstuvwxyz%__PABCDEFGHIJKLMNOPQRSTUVWXYZ%;s%[^_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]%_%g'`
 echo "#ifdef HAVE_$ac_auto_include_have" >> 1ドル
 echo "# include <$ac_auto_include_file>" >> 1ドル
 echo "#endif" >> 1ドル
 echo "" >> 1ドル
done])