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77 lines
2.2 KiB
Plaintext
77 lines
2.2 KiB
Plaintext
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dnl Borut Razem
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dnl
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dnl This macro checks for the presence of the readline library.
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dnl It works also in cross-compilation environment.
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dnl
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dnl To get it into the aclocal.m4 dnl file, do this:
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dnl aclocal -I . --verbose
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dnl
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dnl The --verbose will show all of the files that are searched
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dnl for .m4 macros.
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AC_DEFUN([wi_LIB_READLINE], [
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dnl check for the readline.h header file
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AC_CHECK_HEADER(readline/readline.h)
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if test "$ac_cv_header_readline_readline_h" = yes; then
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dnl check the readline version
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cat > conftest.$ac_ext <<EOF
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#include <stdio.h>
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#include <readline/readline.h>
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wi_LIB_READLINE_VERSION RL_VERSION_MAJOR RL_VERSION_MINOR
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EOF
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wi_READLINE_VERSION=$($CPP $CPPFLAGS conftest.$ac_ext | sed -n -e "s/^wi_LIB_READLINE_VERSION *\([[0-9\]][[0-9\]]*\) *\([[0-9\]][[0-9\]]*\)$/\1.\2/p")
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rm -rf conftest*
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if test -n "$wi_READLINE_VERSION"; then
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wi_MAJOR=$(expr $wi_READLINE_VERSION : '\([[0-9]][[0-9]]*\)\.')
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wi_MINOR=$(expr $wi_READLINE_VERSION : '[[0-9]][[0-9]]*\.\([[0-9]][[0-9]]*$\)')
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if test $wi_MINOR -lt 10; then
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wi_MINOR=$(expr $wi_MINOR \* 10)
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fi
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wi_READLINE_VERSION=$(expr $wi_MAJOR \* 100 + $wi_MINOR)
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else
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wi_READLINE_VERSION=-1
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fi
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dnl check for the readline library
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ac_save_LIBS="$LIBS"
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# Note: $LIBCURSES is permitted to be empty.
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for LIBREADLINE in "-lreadline.dll" "-lreadline" "-lreadline $LIBCURSES" "-lreadline -ltermcap" "-lreadline -lncurses" "-lreadline -lcurses"
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do
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AC_MSG_CHECKING([for GNU Readline library $LIBREADLINE])
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LIBS="$ac_save_LIBS $LIBREADLINE"
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AC_TRY_LINK([
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/* includes */
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#include <stdio.h>
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#include <readline/readline.h>
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],[
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/* function-body */
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int dummy = rl_completion_append_character; /* rl_completion_append_character appeared in version 2.1 */
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readline(NULL);
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],[
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wi_cv_lib_readline=yes
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AC_MSG_RESULT(yes)
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],[
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wi_cv_lib_readline=no
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AC_MSG_RESULT(no)
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])
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if test "$wi_cv_lib_readline" = yes; then
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AC_SUBST(LIBREADLINE)
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AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE, $wi_READLINE_VERSION, [Readline])
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break
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fi
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done
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LIBS="$ac_save_LIBS"
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fi
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])
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