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Viewing changes to m4/include_next.m4

  • Committer: Package Import Robot
  • Author(s): Colin Watson
  • Date: 2012-11-28 03:03:42 UTC
  • mfrom: (8.3.4 sid)
  • Revision ID: package-import@ubuntu.com-20121128030342-21zanj8354gas5gr
Tags: 8.20-3ubuntu1
* Resynchronise with Debian.  Remaining changes:
  - Make 'uname -i -p' return the real processor/hardware, instead of
    unknown.
  - Build-depend on gettext:any instead of on gettext, so that apt-get can
    properly resolve build-dependencies on the tool when cross-building.

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m4/include_next.m4
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# include_next.m4 serial 20
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dnl Copyright (C) 2006-2011 Free Software Foundation, Inc.
 
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# include_next.m4 serial 23
 
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dnl Copyright (C) 2006-2012 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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# even if the compiler does not support include_next.
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# The three "///" are to pacify Sun C 5.8, which otherwise would say
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# "warning: #include of /usr/include/... may be non-portable".
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# Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
 
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# Use '""', not '<>', so that the /// cannot be confused with a C99 comment.
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# Note: This macro assumes that the header file is not empty after
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# preprocessing, i.e. it does not only define preprocessor macros but also
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# provides some type/enum definitions or function/variable declarations.
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                 aix*) gl_absname_cpp="$ac_cpp -C" ;;
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                 *)    gl_absname_cpp="$ac_cpp" ;;
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               esac
 
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changequote(,)
 
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               case "$host_os" in
 
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                 mingw*)
 
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                   dnl For the sake of native Windows compilers (excluding gcc),
 
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                   dnl treat backslash as a directory separator, like /.
 
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                   dnl Actually, these compilers use a double-backslash as
 
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                   dnl directory separator, inside the
 
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                   dnl   # line "filename"
 
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                   dnl directives.
 
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                   gl_dirsep_regex='[/\\]'
 
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                   ;;
 
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                 *)
 
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                   gl_dirsep_regex='\/'
 
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                   ;;
 
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               esac
 
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               dnl A sed expression that turns a string into a basic regular
 
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               dnl expression, for use within "/.../".
 
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               gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g'
 
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changequote([,])
 
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               gl_header_literal_regex=`echo ']m4_defn([gl_HEADER_NAME])[' \
 
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                                        | sed -e "$gl_make_literal_regex_sed"`
 
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               gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{
 
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                   s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/
 
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changequote(,)dnl
 
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                   s|^/[^/]|//&|
 
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changequote([,])dnl
 
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                   p
 
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                   q
 
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                 }'
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               dnl eval is necessary to expand gl_absname_cpp.
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               dnl Ultrix and Pyramid sh refuse to redirect output of eval,
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               dnl so use subshell.
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               AS_VAR_SET(gl_next_header,
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                 ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
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                  sed -n '\#/]m4_defn([gl_HEADER_NAME])[#{
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                    s#.*"\(.*/]m4_defn([gl_HEADER_NAME])[\)".*#\1#
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                    s#^/[^/]#//&#
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                    p
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                    q
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                  }'`'"'])
 
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                      sed -n "$gl_absolute_header_sed"`'"'])
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          m4_if([$2], [check],
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            [else
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               AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>'])