diff options
Diffstat (limited to 'm4/include_next.m4')
| -rw-r--r-- | m4/include_next.m4 | 54 |
1 files changed, 40 insertions, 14 deletions
diff --git a/m4/include_next.m4 b/m4/include_next.m4 index b3c78491..a60a2614 100644 --- a/m4/include_next.m4 +++ b/m4/include_next.m4 @@ -1,5 +1,5 @@ -# include_next.m4 serial 18 -dnl Copyright (C) 2006-2011 Free Software Foundation, Inc. +# include_next.m4 serial 23 +dnl Copyright (C) 2006-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -143,7 +143,7 @@ choke me # even if the compiler does not support include_next. # The three "///" are to pacify Sun C 5.8, which otherwise would say # "warning: #include of /usr/include/... may be non-portable". -# Use `""', not `<>', so that the /// cannot be confused with a C99 comment. +# Use '""', not '<>', so that the /// cannot be confused with a C99 comment. # Note: This macro assumes that the header file is not empty after # preprocessing, i.e. it does not only define preprocessor macros but also # provides some type/enum definitions or function/variable declarations. @@ -175,11 +175,13 @@ AC_DEFUN([gl_NEXT_HEADERS_INTERNAL], [AC_CHECK_HEADERS_ONCE([$1]) ]) +dnl FIXME: gl_next_header and gl_header_exists must be used unquoted +dnl until we can assume autoconf 2.64 or newer. m4_foreach_w([gl_HEADER_NAME], [$1], [AS_VAR_PUSHDEF([gl_next_header], [gl_cv_next_]m4_defn([gl_HEADER_NAME])) if test $gl_cv_have_include_next = yes; then - AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>']) + AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>']) else AC_CACHE_CHECK( [absolute name of <]m4_defn([gl_HEADER_NAME])[>], @@ -205,33 +207,57 @@ AC_DEFUN([gl_NEXT_HEADERS_INTERNAL], aix*) gl_absname_cpp="$ac_cpp -C" ;; *) gl_absname_cpp="$ac_cpp" ;; esac +changequote(,) + case "$host_os" in + mingw*) + dnl For the sake of native Windows compilers (excluding gcc), + dnl treat backslash as a directory separator, like /. + dnl Actually, these compilers use a double-backslash as + dnl directory separator, inside the + dnl # line "filename" + dnl directives. + gl_dirsep_regex='[/\\]' + ;; + *) + gl_dirsep_regex='\/' + ;; + esac + dnl A sed expression that turns a string into a basic regular + dnl expression, for use within "/.../". + gl_make_literal_regex_sed='s,[]$^\\.*/[],\\&,g' +changequote([,]) + gl_header_literal_regex=`echo ']m4_defn([gl_HEADER_NAME])[' \ + | sed -e "$gl_make_literal_regex_sed"` + gl_absolute_header_sed="/${gl_dirsep_regex}${gl_header_literal_regex}/"'{ + s/.*"\(.*'"${gl_dirsep_regex}${gl_header_literal_regex}"'\)".*/\1/ +changequote(,)dnl + s|^/[^/]|//&| +changequote([,])dnl + p + q + }' dnl eval is necessary to expand gl_absname_cpp. dnl Ultrix and Pyramid sh refuse to redirect output of eval, dnl so use subshell. - AS_VAR_SET([gl_next_header], + AS_VAR_SET(gl_next_header, ['"'`(eval "$gl_absname_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD | - sed -n '\#/]m4_defn([gl_HEADER_NAME])[#{ - s#.*"\(.*/]m4_defn([gl_HEADER_NAME])[\)".*#\1# - s#^/[^/]#//&# - p - q - }'`'"']) + sed -n "$gl_absolute_header_sed"`'"']) m4_if([$2], [check], [else - AS_VAR_SET([gl_next_header], ['<'gl_HEADER_NAME'>']) + AS_VAR_SET(gl_next_header, ['<'gl_HEADER_NAME'>']) fi ]) ]) fi AC_SUBST( AS_TR_CPP([NEXT_]m4_defn([gl_HEADER_NAME])), - [AS_VAR_GET([gl_next_header])]) + [AS_VAR_GET(gl_next_header)]) if test $gl_cv_have_include_next = yes || test $gl_cv_have_include_next = buggy; then # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include_next' gl_next_as_first_directive='<'gl_HEADER_NAME'>' else # INCLUDE_NEXT_AS_FIRST_DIRECTIVE='include' - gl_next_as_first_directive=AS_VAR_GET([gl_next_header]) + gl_next_as_first_directive=AS_VAR_GET(gl_next_header) fi AC_SUBST( AS_TR_CPP([NEXT_AS_FIRST_DIRECTIVE_]m4_defn([gl_HEADER_NAME])), |