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dnl Copyright (C) 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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dnl gl_NON_RECURSIVE_GNULIB_PREFIX_HACK LIB_DIR
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dnl Adjust configure-set $gl_LIBOBJS and each AC_SUBST'd *_H variable
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dnl with a value ending in ".h" to reflect that these files are located
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dnl in the directory specified by LIB_DIR.
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AC_DEFUN([gl_NON_RECURSIVE_GNULIB_PREFIX_HACK],
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# Tell AC_LIBSOURCES where to find source files like alloca.c.
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AC_CONFIG_LIBOBJ_DIR([lib])
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# This hack originated in bison. It is required when using non-recursive
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# automake rules to build from gnulib-provided lib/ sources. Hence, LIB_DIR
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# is usually simply "lib". Those rules use the list of names like "fchdir.o"
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# and "strstr.o" in gl_LIBOBJS. With non-recursive make, we must prefix each
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# such file name with the "lib/" prefix. See also build-aux/prefix-gnulib-mk.
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gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , $1/,g'`
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# Listing the names of the variables to prefix is error-prone.
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# Rather, adjust each AC_SUBST'd variable whose name ends in '_H'
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# and whose value ends in '.h'.
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for ac_var in $ac_subst_vars
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eval "ac_val=\$$ac_var"
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case $ac_var:$ac_val in
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(*_H:*.h) eval "$ac_var=$1/\$$ac_var";;
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# If $ALLOCA is not empty, prefix its value with "lib/".
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test -n "$ALLOCA" && ALLOCA="lib/$ALLOCA"