config/programs.m4 - cloudberry - Git at Google

 # config/programs.m4


 # PGAC_PATH_PROGS
 # ---------------
 # This wrapper for AC_PATH_PROGS behaves like that macro except when
 # VARIABLE is already set; in that case we just accept the value verbatim.
 # (AC_PATH_PROGS would accept it only if it looks like an absolute path.)
 # A desirable future improvement would be to convert a non-absolute-path
 # input into absolute form.
 AC_DEFUN([PGAC_PATH_PROGS],
 [if test -z "$$1"; then
   AC_PATH_PROGS($@)
 else
   # Report the value of $1 in configure's output in all cases.
   AC_MSG_CHECKING([for $1])
   AC_MSG_RESULT([$$1])
 fi
 ])


 # PGAC_PATH_BISON
 # ---------------
 # Look for Bison, set the output variable BISON to its path if found.
 # Reject versions before 1.875 (they have bugs or capacity limits).
 # Note we do not accept other implementations of yacc.

 AC_DEFUN([PGAC_PATH_BISON],
 [PGAC_PATH_PROGS(BISON, bison)

 if test "$BISON"; then
   pgac_bison_version=`$BISON --version 2>/dev/null | sed q`
   AC_MSG_NOTICE([using $pgac_bison_version])
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}'
   then
     AC_MSG_WARN([
 *** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
 *** Bison version 1.875 or later is required, but this is $pgac_bison_version.])
     BISON=""
   fi
   # Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
   # of the now preferred %name-prefix "base_yy", but the latter
   # doesn't work with Bison 2.3 or less.  So for now we silence the
   # deprecation warnings.
   if echo "$pgac_bison_version" | $AWK '{ if ([$]4 >= 3) exit 0; else exit 1;}'
   then
     BISONFLAGS="$BISONFLAGS -Wno-deprecated"
   fi
 fi

 if test -z "$BISON"; then
   AC_MSG_WARN([
 *** Without Bison you will not be able to build PostgreSQL from Git nor
 *** change any of the parser definition files.  You can obtain Bison from
 *** a GNU mirror site.  (If you are using the official distribution of
 *** PostgreSQL then you do not need to worry about this, because the Bison
 *** output is pre-generated.)])
 fi
 dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
 AC_SUBST(BISONFLAGS)
 ])# PGAC_PATH_BISON


 # PGAC_PATH_FLEX
 # --------------
 # Look for Flex, set the output variable FLEX to its path if found.
 # Reject versions before 2.5.31, as we need a reasonably non-buggy reentrant
 # scanner.  (Note: the well-publicized security problem in 2.5.31 does not
 # affect Postgres, and there are still distros shipping patched 2.5.31,
 # so allow it.)  Also find Flex if its installed under `lex', but do not
 # accept other Lex programs.

 AC_DEFUN([PGAC_PATH_FLEX],
 [AC_CACHE_CHECK([for flex], pgac_cv_path_flex,
 [# Let the user override the test
 if test -n "$FLEX"; then
   pgac_cv_path_flex=$FLEX
 else
   pgac_save_IFS=$IFS
   IFS=$PATH_SEPARATOR
   for pgac_dir in $PATH; do
     IFS=$pgac_save_IFS
     if test -z "$pgac_dir" || test x"$pgac_dir" = x"."; then
       pgac_dir=`pwd`
     fi
     for pgac_prog in flex lex; do
       pgac_candidate="$pgac_dir/$pgac_prog"
       if test -f "$pgac_candidate" \
         && $pgac_candidate --version </dev/null >/dev/null 2>&1
       then
         echo '%%'  > conftest.l
         if $pgac_candidate -t conftest.l 2>/dev/null | grep FLEX_SCANNER >/dev/null 2>&1; then
           pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
           if echo "$pgac_flex_version" | sed ['s/[^0-9]/ /g'] | $AWK '{ if ([$]1 == 2 && ([$]2 > 5 || ([$]2 == 5 && [$]3 >= 4))) exit 0; else exit 1;}'
           then
             pgac_cv_path_flex=$pgac_candidate
             break 2
           else
             AC_MSG_WARN([
 *** The installed version of Flex, $pgac_candidate, is too old to use with Apache Cloudberry.
 *** Flex version 2.5.4 or later is required, but this is $pgac_flex_version.])
           fi
         fi
       fi
     done
   done
   rm -f conftest.l lex.yy.c
   : ${pgac_cv_path_flex=no}
 fi
 ])[]dnl AC_CACHE_CHECK

 if test x"$pgac_cv_path_flex" = x"no"; then
   AC_MSG_WARN([
 *** Without Flex you will not be able to build PostgreSQL from Git nor
 *** change any of the scanner definition files.  You can obtain Flex from
 *** a GNU mirror site.  (If you are using the official distribution of
 *** PostgreSQL then you do not need to worry about this because the Flex
 *** output is pre-generated.)])

   FLEX=
 else
   FLEX=$pgac_cv_path_flex
   pgac_flex_version=`$FLEX --version 2>/dev/null`
   AC_MSG_NOTICE([using $pgac_flex_version])
 fi

 AC_SUBST(FLEX)
 AC_SUBST(FLEXFLAGS)
 ])# PGAC_PATH_FLEX


 # PGAC_LDAP_SAFE
 # --------------
 # PostgreSQL sometimes loads libldap_r and plain libldap into the same
 # process.  Check for OpenLDAP versions known not to tolerate doing so; assume
 # non-OpenLDAP implementations are safe.  The dblink test suite exercises the
 # hazardous interaction directly.

 AC_DEFUN([PGAC_LDAP_SAFE],
 [AC_CACHE_CHECK([for compatible LDAP implementation], [pgac_cv_ldap_safe],
 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 [#include <ldap.h>
 #if !defined(LDAP_VENDOR_VERSION) || \
      (defined(LDAP_API_FEATURE_X_OPENLDAP) && \
       LDAP_VENDOR_VERSION >= 20424 && LDAP_VENDOR_VERSION <= 20431)
 choke me
 #endif], [])],
 [pgac_cv_ldap_safe=yes],
 [pgac_cv_ldap_safe=no])])

 if test "$pgac_cv_ldap_safe" != yes; then
   AC_MSG_WARN([
 *** With OpenLDAP versions 2.4.24 through 2.4.31, inclusive, each backend
 *** process that loads libpq (via WAL receiver, dblink, or postgres_fdw) and
 *** also uses LDAP will crash on exit.])
 fi])


 # PGAC_CHECK_READLINE
 # -------------------
 # Check for the readline library and dependent libraries, either
 # termcap or curses.  Also try libedit, since NetBSD's is compatible.
 # Add the required flags to LIBS, define HAVE_LIBREADLINE.

 AC_DEFUN([PGAC_CHECK_READLINE],
 [AC_REQUIRE([AC_CANONICAL_HOST])

 AC_CACHE_CHECK([for library containing readline], [pgac_cv_check_readline],
 [pgac_cv_check_readline=no
 pgac_save_LIBS=$LIBS
 if test x"$with_libedit_preferred" != x"yes"
 then	READLINE_ORDER="-lreadline -ledit"
 else	READLINE_ORDER="-ledit -lreadline"
 fi
 for pgac_rllib in $READLINE_ORDER ; do
   for pgac_lib in "" " -ltermcap" " -lncurses" " -lcurses" ; do
     LIBS="${pgac_rllib}${pgac_lib} $pgac_save_LIBS"
     AC_TRY_LINK_FUNC([readline], [[
       # Older NetBSD and OpenBSD have a broken linker that does not
       # recognize dependent libraries; assume curses is needed if we didn't
       # find any dependency.
       case $host_os in
         netbsd* | openbsd*)
           if test x"$pgac_lib" = x"" ; then
             pgac_lib=" -lcurses"
           fi ;;
       esac

       pgac_cv_check_readline="${pgac_rllib}${pgac_lib}"
       break
     ]])
   done
   if test "$pgac_cv_check_readline" != no ; then
     break
   fi
 done
 LIBS=$pgac_save_LIBS
 ])[]dnl AC_CACHE_CHECK

 if test "$pgac_cv_check_readline" != no ; then
   LIBS="$pgac_cv_check_readline $LIBS"
   AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a function readline library])
 fi

 ])# PGAC_CHECK_READLINE


 # PGAC_READLINE_VARIABLES
 # -----------------------
 # Readline versions < 2.1 don't have rl_completion_append_character,
 # and some versions lack rl_completion_suppress_quote.
 # Libedit lacks rl_filename_quote_characters and rl_filename_quoting_function

 AC_DEFUN([PGAC_READLINE_VARIABLES],
 [AC_CACHE_CHECK([for rl_completion_append_character], pgac_cv_var_rl_completion_append_character,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
 #if defined(HAVE_READLINE_READLINE_H)
 #include <readline/readline.h>
 #elif defined(HAVE_EDITLINE_READLINE_H)
 #include <editline/readline.h>
 #elif defined(HAVE_READLINE_H)
 #include <readline.h>
 #endif
 ],
 [rl_completion_append_character = 'x';])],
 [pgac_cv_var_rl_completion_append_character=yes],
 [pgac_cv_var_rl_completion_append_character=no])])
 if test x"$pgac_cv_var_rl_completion_append_character" = x"yes"; then
 AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
           [Define to 1 if you have the global variable 'rl_completion_append_character'.])
 fi
 AC_CACHE_CHECK([for rl_completion_suppress_quote], pgac_cv_var_rl_completion_suppress_quote,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
 #if defined(HAVE_READLINE_READLINE_H)
 #include <readline/readline.h>
 #elif defined(HAVE_EDITLINE_READLINE_H)
 #include <editline/readline.h>
 #elif defined(HAVE_READLINE_H)
 #include <readline.h>
 #endif
 ],
 [rl_completion_suppress_quote = 1;])],
 [pgac_cv_var_rl_completion_suppress_quote=yes],
 [pgac_cv_var_rl_completion_suppress_quote=no])])
 if test x"$pgac_cv_var_rl_completion_suppress_quote" = x"yes"; then
 AC_DEFINE(HAVE_RL_COMPLETION_SUPPRESS_QUOTE, 1,
           [Define to 1 if you have the global variable 'rl_completion_suppress_quote'.])
 fi
 AC_CACHE_CHECK([for rl_filename_quote_characters], pgac_cv_var_rl_filename_quote_characters,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
 #if defined(HAVE_READLINE_READLINE_H)
 #include <readline/readline.h>
 #elif defined(HAVE_EDITLINE_READLINE_H)
 #include <editline/readline.h>
 #elif defined(HAVE_READLINE_H)
 #include <readline.h>
 #endif
 ],
 [rl_filename_quote_characters = "x";])],
 [pgac_cv_var_rl_filename_quote_characters=yes],
 [pgac_cv_var_rl_filename_quote_characters=no])])
 if test x"$pgac_cv_var_rl_filename_quote_characters" = x"yes"; then
 AC_DEFINE(HAVE_RL_FILENAME_QUOTE_CHARACTERS, 1,
           [Define to 1 if you have the global variable 'rl_filename_quote_characters'.])
 fi
 AC_CACHE_CHECK([for rl_filename_quoting_function], pgac_cv_var_rl_filename_quoting_function,
 [AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
 #if defined(HAVE_READLINE_READLINE_H)
 #include <readline/readline.h>
 #elif defined(HAVE_EDITLINE_READLINE_H)
 #include <editline/readline.h>
 #elif defined(HAVE_READLINE_H)
 #include <readline.h>
 #endif
 ],
 [rl_filename_quoting_function = 0;])],
 [pgac_cv_var_rl_filename_quoting_function=yes],
 [pgac_cv_var_rl_filename_quoting_function=no])])
 if test x"$pgac_cv_var_rl_filename_quoting_function" = x"yes"; then
 AC_DEFINE(HAVE_RL_FILENAME_QUOTING_FUNCTION, 1,
           [Define to 1 if you have the global variable 'rl_filename_quoting_function'.])
 fi
 ])# PGAC_READLINE_VARIABLES


 # PGAC_CHECK_GETTEXT
 # ------------------
 # We check for bind_textdomain_codeset() not just gettext().  GNU gettext
 # before 0.10.36 does not have that function, and is generally too incomplete
 # to be usable.

 AC_DEFUN([PGAC_CHECK_GETTEXT],
 [
   AC_SEARCH_LIBS(bind_textdomain_codeset, intl, [],
                  [AC_MSG_ERROR([a gettext implementation is required for NLS])])
   AC_CHECK_HEADER([libintl.h], [],
                   [AC_MSG_ERROR([header file <libintl.h> is required for NLS])])
   PGAC_PATH_PROGS(MSGFMT, msgfmt)
   AC_ARG_VAR(MSGFMT, [msgfmt program for NLS])dnl
   if test -z "$MSGFMT"; then
     AC_MSG_ERROR([msgfmt is required for NLS])
   fi
   AC_CACHE_CHECK([for msgfmt flags], pgac_cv_msgfmt_flags,
 [if test x"$MSGFMT" != x"" && "$MSGFMT" --version 2>&1 | grep "GNU" >/dev/null; then
     pgac_cv_msgfmt_flags=-c
 fi])
   AC_SUBST(MSGFMT_FLAGS, $pgac_cv_msgfmt_flags)
   PGAC_PATH_PROGS(MSGMERGE, msgmerge)
   PGAC_PATH_PROGS(XGETTEXT, xgettext)
 ])# PGAC_CHECK_GETTEXT


 # PGAC_CHECK_STRIP
 # ----------------
 # Check for a 'strip' program, and figure out if that program can
 # strip libraries.

 AC_DEFUN([PGAC_CHECK_STRIP],
 [
   AC_CHECK_TOOL(STRIP, strip, :)

   AC_MSG_CHECKING([whether it is possible to strip libraries])
   if test x"$STRIP" != x"" && "$STRIP" -V 2>&1 | grep "GNU strip" >/dev/null; then
     STRIP_STATIC_LIB="$STRIP -x"
     STRIP_SHARED_LIB="$STRIP --strip-unneeded"
     AC_MSG_RESULT(yes)
   else
     case $host_os in
       darwin*)
         STRIP="$STRIP -x"
         STRIP_STATIC_LIB=$STRIP
         STRIP_SHARED_LIB=$STRIP
         AC_MSG_RESULT(yes)
         ;;
       *)
         STRIP_STATIC_LIB=:
         STRIP_SHARED_LIB=:
         AC_MSG_RESULT(no)
         ;;
     esac
   fi
   AC_SUBST(STRIP_STATIC_LIB)
   AC_SUBST(STRIP_SHARED_LIB)
 ])# PGAC_CHECK_STRIP


 # GPAC_PATH_APR_1_CONFIG
 # ----------------------
 # Check for apr-1-config, used by gpfdist
 AC_DEFUN([GPAC_PATH_APR_1_CONFIG],
 [
 if test x"$with_apr_config" != x; then
   APR_1_CONFIG=$with_apr_config
 fi
 if test -z "$APR_1_CONFIG"; then
   AC_PATH_PROGS(APR_1_CONFIG, apr-1-config)
 fi

 if test -n "$APR_1_CONFIG"; then
   gpac_apr_1_config_version=`$APR_1_CONFIG --version 2>/dev/null | sed q`
   if test -z "$gpac_apr_1_config_version"; then
     AC_MSG_ERROR([apr-1-config is required for gpfdist, unable to identify version])
   fi
   AC_MSG_NOTICE([using apr-1-config $gpac_apr_1_config_version])
   apr_includes=`"$APR_1_CONFIG" --includes`
   apr_link_ld_libs=`"$APR_1_CONFIG" --link-ld --libs`
   apr_cflags=`"$APR_1_CONFIG" --cflags`
   apr_cppflags=`"$APR_1_CONFIG" --cppflags`
   AC_SUBST(apr_includes)
   AC_SUBST(apr_link_ld_libs)
   AC_SUBST(apr_cflags)
   AC_SUBST(apr_cppflags)
 else
   AC_MSG_ERROR([apr-1-config is required for gpfdist, unable to find binary])
 fi
 ]) # GPAC_PATH_APR_1_CONFIG
	# config/programs.m4


	# PGAC_PATH_PROGS
	# ---------------
	# This wrapper for AC_PATH_PROGS behaves like that macro except when
	# VARIABLE is already set; in that case we just accept the value verbatim.
	# (AC_PATH_PROGS would accept it only if it looks like an absolute path.)
	# A desirable future improvement would be to convert a non-absolute-path
	# input into absolute form.
	AC_DEFUN([PGAC_PATH_PROGS],
	[if test -z "$$1"; then
	AC_PATH_PROGS($@)
	else
	# Report the value of $1 in configure's output in all cases.
	AC_MSG_CHECKING([for $1])
	AC_MSG_RESULT([$$1])
	fi
	])


	# PGAC_PATH_BISON
	# ---------------
	# Look for Bison, set the output variable BISON to its path if found.
	# Reject versions before 1.875 (they have bugs or capacity limits).
	# Note we do not accept other implementations of yacc.

	AC_DEFUN([PGAC_PATH_BISON],
	[PGAC_PATH_PROGS(BISON, bison)

	if test "$BISON"; then
	pgac_bison_version=`$BISON --version 2>/dev/null \| sed q`
	AC_MSG_NOTICE([using $pgac_bison_version])
	if echo "$pgac_bison_version" \| $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}'
	then
	AC_MSG_WARN([
	*** The installed version of Bison, $BISON, is too old to use with PostgreSQL.
	*** Bison version 1.875 or later is required, but this is $pgac_bison_version.])
	BISON=""
	fi
	# Bison >=3.0 issues warnings about %name-prefix="base_yy", instead
	# of the now preferred %name-prefix "base_yy", but the latter
	# doesn't work with Bison 2.3 or less. So for now we silence the
	# deprecation warnings.
	if echo "$pgac_bison_version" \| $AWK '{ if ([$]4 >= 3) exit 0; else exit 1;}'
	then
	BISONFLAGS="$BISONFLAGS -Wno-deprecated"
	fi
	fi

	if test -z "$BISON"; then
	AC_MSG_WARN([
	*** Without Bison you will not be able to build PostgreSQL from Git nor
	*** change any of the parser definition files. You can obtain Bison from
	*** a GNU mirror site. (If you are using the official distribution of
	*** PostgreSQL then you do not need to worry about this, because the Bison
	*** output is pre-generated.)])
	fi
	dnl We don't need AC_SUBST(BISON) because PGAC_PATH_PROGS did it
	AC_SUBST(BISONFLAGS)
	])# PGAC_PATH_BISON



	# PGAC_PATH_FLEX
	# --------------
	# Look for Flex, set the output variable FLEX to its path if found.
	# Reject versions before 2.5.31, as we need a reasonably non-buggy reentrant
	# scanner. (Note: the well-publicized security problem in 2.5.31 does not
	# affect Postgres, and there are still distros shipping patched 2.5.31,
	# so allow it.) Also find Flex if its installed under `lex', but do not
	# accept other Lex programs.

	AC_DEFUN([PGAC_PATH_FLEX],
	[AC_CACHE_CHECK([for flex], pgac_cv_path_flex,
	[# Let the user override the test
	if test -n "$FLEX"; then
	pgac_cv_path_flex=$FLEX
	else
	pgac_save_IFS=$IFS
	IFS=$PATH_SEPARATOR
	for pgac_dir in $PATH; do
	IFS=$pgac_save_IFS
	if test -z "$pgac_dir" \|\| test x"$pgac_dir" = x"."; then
	pgac_dir=`pwd`
	fi
	for pgac_prog in flex lex; do
	pgac_candidate="$pgac_dir/$pgac_prog"
	if test -f "$pgac_candidate" \
	&& $pgac_candidate --version </dev/null >/dev/null 2>&1
	then
	echo '%%' > conftest.l
	if $pgac_candidate -t conftest.l 2>/dev/null \| grep FLEX_SCANNER >/dev/null 2>&1; then
	pgac_flex_version=`$pgac_candidate --version 2>/dev/null`
	if echo "$pgac_flex_version" \| sed ['s/[^0-9]/ /g'] \| $AWK '{ if ([$]1 == 2 && ([$]2 > 5 \|\| ([$]2 == 5 && [$]3 >= 4))) exit 0; else exit 1;}'
	then
	pgac_cv_path_flex=$pgac_candidate
	break 2
	else
	AC_MSG_WARN([
	*** The installed version of Flex, $pgac_candidate, is too old to use with Apache Cloudberry.
	*** Flex version 2.5.4 or later is required, but this is $pgac_flex_version.])
	fi
	fi
	fi
	done
	done
	rm -f conftest.l lex.yy.c
	: ${pgac_cv_path_flex=no}
	fi
	])[]dnl AC_CACHE_CHECK

	if test x"$pgac_cv_path_flex" = x"no"; then
	AC_MSG_WARN([
	*** Without Flex you will not be able to build PostgreSQL from Git nor
	*** change any of the scanner definition files. You can obtain Flex from
	*** a GNU mirror site. (If you are using the official distribution of
	*** PostgreSQL then you do not need to worry about this because the Flex
	*** output is pre-generated.)])

	FLEX=
	else
	FLEX=$pgac_cv_path_flex
	pgac_flex_version=`$FLEX --version 2>/dev/null`
	AC_MSG_NOTICE([using $pgac_flex_version])
	fi

	AC_SUBST(FLEX)
	AC_SUBST(FLEXFLAGS)
	])# PGAC_PATH_FLEX



	# PGAC_LDAP_SAFE
	# --------------
	# PostgreSQL sometimes loads libldap_r and plain libldap into the same
	# process. Check for OpenLDAP versions known not to tolerate doing so; assume
	# non-OpenLDAP implementations are safe. The dblink test suite exercises the
	# hazardous interaction directly.

	AC_DEFUN([PGAC_LDAP_SAFE],
	[AC_CACHE_CHECK([for compatible LDAP implementation], [pgac_cv_ldap_safe],
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
	[#include <ldap.h>
	#if !defined(LDAP_VENDOR_VERSION) \|\| \
	(defined(LDAP_API_FEATURE_X_OPENLDAP) && \
	LDAP_VENDOR_VERSION >= 20424 && LDAP_VENDOR_VERSION <= 20431)
	choke me
	#endif], [])],
	[pgac_cv_ldap_safe=yes],
	[pgac_cv_ldap_safe=no])])

	if test "$pgac_cv_ldap_safe" != yes; then
	AC_MSG_WARN([
	*** With OpenLDAP versions 2.4.24 through 2.4.31, inclusive, each backend
	*** process that loads libpq (via WAL receiver, dblink, or postgres_fdw) and
	*** also uses LDAP will crash on exit.])
	fi])



	# PGAC_CHECK_READLINE
	# -------------------
	# Check for the readline library and dependent libraries, either
	# termcap or curses. Also try libedit, since NetBSD's is compatible.
	# Add the required flags to LIBS, define HAVE_LIBREADLINE.

	AC_DEFUN([PGAC_CHECK_READLINE],
	[AC_REQUIRE([AC_CANONICAL_HOST])

	AC_CACHE_CHECK([for library containing readline], [pgac_cv_check_readline],
	[pgac_cv_check_readline=no
	pgac_save_LIBS=$LIBS
	if test x"$with_libedit_preferred" != x"yes"
	then READLINE_ORDER="-lreadline -ledit"
	else READLINE_ORDER="-ledit -lreadline"
	fi
	for pgac_rllib in $READLINE_ORDER ; do
	for pgac_lib in "" " -ltermcap" " -lncurses" " -lcurses" ; do
	LIBS="${pgac_rllib}${pgac_lib} $pgac_save_LIBS"
	AC_TRY_LINK_FUNC([readline], [[
	# Older NetBSD and OpenBSD have a broken linker that does not
	# recognize dependent libraries; assume curses is needed if we didn't
	# find any dependency.
	case $host_os in
	netbsd* \| openbsd*)
	if test x"$pgac_lib" = x"" ; then
	pgac_lib=" -lcurses"
	fi ;;
	esac

	pgac_cv_check_readline="${pgac_rllib}${pgac_lib}"
	break
	]])
	done
	if test "$pgac_cv_check_readline" != no ; then
	break
	fi
	done
	LIBS=$pgac_save_LIBS
	])[]dnl AC_CACHE_CHECK

	if test "$pgac_cv_check_readline" != no ; then
	LIBS="$pgac_cv_check_readline $LIBS"
	AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a function readline library])
	fi

	])# PGAC_CHECK_READLINE



	# PGAC_READLINE_VARIABLES
	# -----------------------
	# Readline versions < 2.1 don't have rl_completion_append_character,
	# and some versions lack rl_completion_suppress_quote.
	# Libedit lacks rl_filename_quote_characters and rl_filename_quoting_function

	AC_DEFUN([PGAC_READLINE_VARIABLES],
	[AC_CACHE_CHECK([for rl_completion_append_character], pgac_cv_var_rl_completion_append_character,
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
	#if defined(HAVE_READLINE_READLINE_H)
	#include <readline/readline.h>
	#elif defined(HAVE_EDITLINE_READLINE_H)
	#include <editline/readline.h>
	#elif defined(HAVE_READLINE_H)
	#include <readline.h>
	#endif
	],
	[rl_completion_append_character = 'x';])],
	[pgac_cv_var_rl_completion_append_character=yes],
	[pgac_cv_var_rl_completion_append_character=no])])
	if test x"$pgac_cv_var_rl_completion_append_character" = x"yes"; then
	AC_DEFINE(HAVE_RL_COMPLETION_APPEND_CHARACTER, 1,
	[Define to 1 if you have the global variable 'rl_completion_append_character'.])
	fi
	AC_CACHE_CHECK([for rl_completion_suppress_quote], pgac_cv_var_rl_completion_suppress_quote,
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
	#if defined(HAVE_READLINE_READLINE_H)
	#include <readline/readline.h>
	#elif defined(HAVE_EDITLINE_READLINE_H)
	#include <editline/readline.h>
	#elif defined(HAVE_READLINE_H)
	#include <readline.h>
	#endif
	],
	[rl_completion_suppress_quote = 1;])],
	[pgac_cv_var_rl_completion_suppress_quote=yes],
	[pgac_cv_var_rl_completion_suppress_quote=no])])
	if test x"$pgac_cv_var_rl_completion_suppress_quote" = x"yes"; then
	AC_DEFINE(HAVE_RL_COMPLETION_SUPPRESS_QUOTE, 1,
	[Define to 1 if you have the global variable 'rl_completion_suppress_quote'.])
	fi
	AC_CACHE_CHECK([for rl_filename_quote_characters], pgac_cv_var_rl_filename_quote_characters,
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
	#if defined(HAVE_READLINE_READLINE_H)
	#include <readline/readline.h>
	#elif defined(HAVE_EDITLINE_READLINE_H)
	#include <editline/readline.h>
	#elif defined(HAVE_READLINE_H)
	#include <readline.h>
	#endif
	],
	[rl_filename_quote_characters = "x";])],
	[pgac_cv_var_rl_filename_quote_characters=yes],
	[pgac_cv_var_rl_filename_quote_characters=no])])
	if test x"$pgac_cv_var_rl_filename_quote_characters" = x"yes"; then
	AC_DEFINE(HAVE_RL_FILENAME_QUOTE_CHARACTERS, 1,
	[Define to 1 if you have the global variable 'rl_filename_quote_characters'.])
	fi
	AC_CACHE_CHECK([for rl_filename_quoting_function], pgac_cv_var_rl_filename_quoting_function,
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>
	#if defined(HAVE_READLINE_READLINE_H)
	#include <readline/readline.h>
	#elif defined(HAVE_EDITLINE_READLINE_H)
	#include <editline/readline.h>
	#elif defined(HAVE_READLINE_H)
	#include <readline.h>
	#endif
	],
	[rl_filename_quoting_function = 0;])],
	[pgac_cv_var_rl_filename_quoting_function=yes],
	[pgac_cv_var_rl_filename_quoting_function=no])])
	if test x"$pgac_cv_var_rl_filename_quoting_function" = x"yes"; then
	AC_DEFINE(HAVE_RL_FILENAME_QUOTING_FUNCTION, 1,
	[Define to 1 if you have the global variable 'rl_filename_quoting_function'.])
	fi
	])# PGAC_READLINE_VARIABLES



	# PGAC_CHECK_GETTEXT
	# ------------------
	# We check for bind_textdomain_codeset() not just gettext(). GNU gettext
	# before 0.10.36 does not have that function, and is generally too incomplete
	# to be usable.

	AC_DEFUN([PGAC_CHECK_GETTEXT],
	[
	AC_SEARCH_LIBS(bind_textdomain_codeset, intl, [],
	[AC_MSG_ERROR([a gettext implementation is required for NLS])])
	AC_CHECK_HEADER([libintl.h], [],
	[AC_MSG_ERROR([header file <libintl.h> is required for NLS])])
	PGAC_PATH_PROGS(MSGFMT, msgfmt)
	AC_ARG_VAR(MSGFMT, [msgfmt program for NLS])dnl
	if test -z "$MSGFMT"; then
	AC_MSG_ERROR([msgfmt is required for NLS])
	fi
	AC_CACHE_CHECK([for msgfmt flags], pgac_cv_msgfmt_flags,
	[if test x"$MSGFMT" != x"" && "$MSGFMT" --version 2>&1 \| grep "GNU" >/dev/null; then
	pgac_cv_msgfmt_flags=-c
	fi])
	AC_SUBST(MSGFMT_FLAGS, $pgac_cv_msgfmt_flags)
	PGAC_PATH_PROGS(MSGMERGE, msgmerge)
	PGAC_PATH_PROGS(XGETTEXT, xgettext)
	])# PGAC_CHECK_GETTEXT



	# PGAC_CHECK_STRIP
	# ----------------
	# Check for a 'strip' program, and figure out if that program can
	# strip libraries.

	AC_DEFUN([PGAC_CHECK_STRIP],
	[
	AC_CHECK_TOOL(STRIP, strip, :)

	AC_MSG_CHECKING([whether it is possible to strip libraries])
	if test x"$STRIP" != x"" && "$STRIP" -V 2>&1 \| grep "GNU strip" >/dev/null; then
	STRIP_STATIC_LIB="$STRIP -x"
	STRIP_SHARED_LIB="$STRIP --strip-unneeded"
	AC_MSG_RESULT(yes)
	else
	case $host_os in
	darwin*)
	STRIP="$STRIP -x"
	STRIP_STATIC_LIB=$STRIP
	STRIP_SHARED_LIB=$STRIP
	AC_MSG_RESULT(yes)
	;;
	*)
	STRIP_STATIC_LIB=:
	STRIP_SHARED_LIB=:
	AC_MSG_RESULT(no)
	;;
	esac
	fi
	AC_SUBST(STRIP_STATIC_LIB)
	AC_SUBST(STRIP_SHARED_LIB)
	])# PGAC_CHECK_STRIP


	# GPAC_PATH_APR_1_CONFIG
	# ----------------------
	# Check for apr-1-config, used by gpfdist
	AC_DEFUN([GPAC_PATH_APR_1_CONFIG],
	[
	if test x"$with_apr_config" != x; then
	APR_1_CONFIG=$with_apr_config
	fi
	if test -z "$APR_1_CONFIG"; then
	AC_PATH_PROGS(APR_1_CONFIG, apr-1-config)
	fi

	if test -n "$APR_1_CONFIG"; then
	gpac_apr_1_config_version=`$APR_1_CONFIG --version 2>/dev/null \| sed q`
	if test -z "$gpac_apr_1_config_version"; then
	AC_MSG_ERROR([apr-1-config is required for gpfdist, unable to identify version])
	fi
	AC_MSG_NOTICE([using apr-1-config $gpac_apr_1_config_version])
	apr_includes=`"$APR_1_CONFIG" --includes`
	apr_link_ld_libs=`"$APR_1_CONFIG" --link-ld --libs`
	apr_cflags=`"$APR_1_CONFIG" --cflags`
	apr_cppflags=`"$APR_1_CONFIG" --cppflags`
	AC_SUBST(apr_includes)
	AC_SUBST(apr_link_ld_libs)
	AC_SUBST(apr_cflags)
	AC_SUBST(apr_cppflags)
	else
	AC_MSG_ERROR([apr-1-config is required for gpfdist, unable to find binary])
	fi
	]) # GPAC_PATH_APR_1_CONFIG