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Autoconf 2.5x makes this unnecessary.
AC_AS_DIRNAME (PATH)
this is the macro AS_DIRNAME from autoconf 2.4x defined here for use in autoconf 2.1x, remove the AC_ when you use 2.4x
Guido Draheim <guidod@gmx.de>
2005-01-25
AC_DEFUN([AC_ECHO_MKFILE], [dnl case $2 in */*) P=` AC_AS_DIRNAME($2) ` ; AC_AS_MKDIR_P($P) ;; esac echo "$1" >$2 ]) AC_DEFUN([AC_AS_DIRNAME], [AC_AS_DIRNAME_EXPR([$1]) 2>/dev/null || AC_AS_DIRNAME_SED([$1]) ]) # _AC_AS_EXPR_PREPARE # ---------------- # Some expr work properly (i.e. compute and issue the right result), # but exit with failure. When a fall back to expr (as in AS_DIRNAME) # is provided, you get twice the result. Prevent this. AC_DEFUN([_AC_AS_EXPR_PREPARE], [if expr a : '\(a\)' >/dev/null 2>&1; then as_expr=expr else as_expr=false fi ])# _AC_AS_EXPR_PREPARE # AS_DIRNAME(PATHNAME) # -------------------- # Simulate running `dirname(1)' on PATHNAME, not all systems have it. # This macro must be usable from inside ` `. # # Prefer expr to echo|sed, since expr is usually faster and it handles # backslashes and newlines correctly. However, older expr # implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have # a silly length limit that causes expr to fail if the matched # substring is longer than 120 bytes. So fall back on echo|sed if # expr fails. # # FIXME: Please note the following m4_require is quite wrong: if the first # occurrence of AS_DIRNAME_EXPR is in a backquoted expression, the # shell will be lost. We might have to introduce diversions for # setting up an M4sh script: required macros will then be expanded there. AC_DEFUN([AC_AS_DIRNAME_EXPR], [AC_REQUIRE([_AC_AS_EXPR_PREPARE])dnl $as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \ X[]$1 : 'X\(//\)[[^/]]' \| \ X[]$1 : 'X\(//\)$' \| \ X[]$1 : 'X\(/\)' \| \ . : '\(.\)']) AC_DEFUN([AC_AS_DIRNAME_SED], [echo X[]$1 | sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; } /^X\(\/\/\)[^/].*/{ s//\1/; q; } /^X\(\/\/\)$/{ s//\1/; q; } /^X\(\/\).*/{ s//\1/; q; } s/.*/./; q']])
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