1 dnl Copyright (C) 2012-2020 Free Software Foundation, Inc.
2 dnl This file is free software; the Free Software Foundation
3 dnl gives unlimited permission to copy and/or distribute it,
4 dnl with or without modifications, as long as this notice is preserved.
6 dnl gl_NON_RECURSIVE_GNULIB_PREFIX_HACK LIB_DIR
7 dnl Adjust configure-set $gl_LIBOBJS and each AC_SUBST'd *_H variable
8 dnl with a value ending in ".h" to reflect that these files are located
9 dnl in the directory specified by LIB_DIR.
10 AC_DEFUN([gl_NON_RECURSIVE_GNULIB_PREFIX_HACK],
12 # Tell AC_LIBSOURCES where to find source files like alloca.c.
13 AC_CONFIG_LIBOBJ_DIR([$1])
15 # This hack originated in bison. It is required when using non-recursive
16 # automake rules to build from gnulib-provided lib/ sources. Hence, LIB_DIR
17 # is usually simply "lib". Those rules use the list of names like "fchdir.o"
18 # and "strstr.o" in gl_LIBOBJS. With non-recursive make, we must prefix each
19 # such file name with the "lib/" prefix. See also build-aux/prefix-gnulib-mk.
20 gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , $1/,g'`
22 # Listing the names of the variables to prefix is error-prone.
23 # Rather, adjust each AC_SUBST'd variable whose name ends in '_H'
24 # and whose value ends in '.h'.
25 for ac_var in $ac_subst_vars
27 eval "ac_val=\$$ac_var"
28 case $ac_var:$ac_val in
29 *_H:*.h) eval "$ac_var=$1/\$$ac_var";;