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Adjust configure script to print the bison and flex versions in use.

Browse Source 
Minor rearrangements to make a few tests in a more logical order.
REL8_3_STABLE
Tom Lane 18 years ago
parent d514ea3fda
commit 177be3f9bb
3 changed files with 235 additions and 208 deletions
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  1. 46
      config/programs.m4
  2. 363
      configure
  3. 34
      configure.in

46
config/programs.m4
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@ -1,4 +1,44 @@
# $PostgreSQL: pgsql/config/programs.m4,v 1.20 2006/05/23 19:28:45 momjian Exp $
# $PostgreSQL: pgsql/config/programs.m4,v 1.21 2007/07/19 17:15:30 tgl Exp $
# PGAC_PATH_YACC
# --------------
# Look for Bison, set the output variable YACC 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_YACC],
[# Let the user override the search
if test -z "$YACC"; then
AC_CHECK_PROGS(YACC, ['bison -y'])
fi
if test "$YACC"; then
pgac_yacc_version=`$YACC --version 2>/dev/null | sed q`
AC_MSG_NOTICE([using $pgac_yacc_version])
if echo "$pgac_yacc_version" | $AWK '{ if ([$]4 < 1.875) exit 0; else exit 1;}'
then
AC_MSG_WARN([
*** The installed version of Bison is too old to use with PostgreSQL.
*** Bison version 1.875 or later is required.])
YACC=""
fi
fi
if test -z "$YACC"; then
AC_MSG_WARN([
*** Without Bison you will not be able to build PostgreSQL from CVS nor
*** change any of the parser definition files. You can obtain Bison from
*** a GNU mirror site. (If you are using the official distribution of
*** PostgreSQL then you do not need to worry about this, because the Bison
*** output is pre-generated.) To use a different yacc program (possible,
*** but not recommended), set the environment variable YACC before running
*** 'configure'.])
fi
# We don't need AC_SUBST(YACC) because AC_PATH_PROG did it
AC_SUBST(YFLAGS)
])# PGAC_PATH_YACC
# PGAC_PATH_FLEX
@ -56,12 +96,12 @@ if test x"$pgac_cv_path_flex" = x"no"; then
*** 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.)])
fi
if test x"$pgac_cv_path_flex" = x"no"; then
FLEX=
else
FLEX=$pgac_cv_path_flex
pgac_flex_version=`$FLEX -V 2>/dev/null`
AC_MSG_NOTICE([using $pgac_flex_version])
fi
AC_SUBST(FLEX)

363
configure vendored
Unescape View File

@ -314,7 +314,7 @@ ac_includes_default="\
# include <unistd.h>
#endif"
ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS configure_args build build_cpu build_vendor build_os host host_cpu host_vendor host_os PORTNAME docdir enable_nls WANTED_LANGUAGES default_port enable_shared enable_rpath enable_debug enable_profiling DTRACE DTRACEFLAGS enable_dtrace CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP GCC TAS autodepend INCLUDES enable_thread_safety with_tcl with_perl with_python with_gssapi with_krb5 krb_srvtab with_pam with_ldap with_bonjour with_openssl with_ossp_uuid XML2_CONFIG with_libxml with_libxslt with_zlib EGREP ELF_SYS LDFLAGS_SL AWK FLEX FLEXFLAGS LN_S LD with_gnu_ld ld_R_works RANLIB ac_ct_RANLIB TAR STRIP ac_ct_STRIP STRIP_STATIC_LIB STRIP_SHARED_LIB YACC YFLAGS PERL perl_archlibexp perl_privlibexp perl_useshrplib perl_embed_ldflags PYTHON python_version python_configdir python_includespec python_libdir python_libspec python_additional_libs HAVE_IPV6 LIBOBJS acx_pthread_config PTHREAD_CC PTHREAD_LIBS PTHREAD_CFLAGS LDAP_LIBS_FE LDAP_LIBS_BE HAVE_POSIX_SIGNALS MSGFMT MSGMERGE XGETTEXT localedir TCLSH TCL_CONFIG_SH TCL_INCLUDE_SPEC TCL_LIB_FILE TCL_LIBS TCL_LIB_SPEC TCL_SHARED_BUILD TCL_SHLIB_LD_LIBS NSGMLS JADE have_docbook DOCBOOKSTYLE COLLATEINDEX SGMLSPL vpath_build LTLIBOBJS'
ac_subst_vars='SHELL PATH_SEPARATOR PACKAGE_NAME PACKAGE_TARNAME PACKAGE_VERSION PACKAGE_STRING PACKAGE_BUGREPORT exec_prefix prefix program_transform_name bindir sbindir libexecdir datadir sysconfdir sharedstatedir localstatedir libdir includedir oldincludedir infodir mandir build_alias host_alias target_alias DEFS ECHO_C ECHO_N ECHO_T LIBS configure_args build build_cpu build_vendor build_os host host_cpu host_vendor host_os PORTNAME docdir enable_nls WANTED_LANGUAGES default_port enable_shared enable_rpath enable_debug enable_profiling DTRACE DTRACEFLAGS enable_dtrace CC CFLAGS LDFLAGS CPPFLAGS ac_ct_CC EXEEXT OBJEXT CPP GCC TAS autodepend INCLUDES enable_thread_safety with_tcl with_perl with_python with_gssapi with_krb5 krb_srvtab with_pam with_ldap with_bonjour with_openssl with_ossp_uuid XML2_CONFIG with_libxml with_libxslt with_zlib EGREP ELF_SYS LDFLAGS_SL LD with_gnu_ld ld_R_works RANLIB ac_ct_RANLIB STRIP ac_ct_STRIP STRIP_STATIC_LIB STRIP_SHARED_LIB TAR LN_S AWK YACC YFLAGS FLEX FLEXFLAGS PERL perl_archlibexp perl_privlibexp perl_useshrplib perl_embed_ldflags PYTHON python_version python_configdir python_includespec python_libdir python_libspec python_additional_libs HAVE_IPV6 LIBOBJS acx_pthread_config PTHREAD_CC PTHREAD_LIBS PTHREAD_CFLAGS LDAP_LIBS_FE LDAP_LIBS_BE HAVE_POSIX_SIGNALS MSGFMT MSGMERGE XGETTEXT localedir TCLSH TCL_CONFIG_SH TCL_INCLUDE_SPEC TCL_LIB_FILE TCL_LIBS TCL_LIB_SPEC TCL_SHARED_BUILD TCL_SHLIB_LD_LIBS NSGMLS JADE have_docbook DOCBOOKSTYLE COLLATEINDEX SGMLSPL vpath_build LTLIBOBJS'
ac_subst_files=''
# Initialize some variables set by options.
@ -4547,131 +4547,6 @@ echo "$as_me: using LDFLAGS=$LDFLAGS" >&6;}
for ac_prog in gawk mawk nawk awk
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
echo "$as_me:$LINENO: checking for $ac_word" >&5
echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
if test "${ac_cv_prog_AWK+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
if test -n "$AWK"; then
ac_cv_prog_AWK="$AWK" # Let the user override the test.
else
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_prog_AWK="$ac_prog"
echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
fi
fi
AWK=$ac_cv_prog_AWK
if test -n "$AWK"; then
echo "$as_me:$LINENO: result: $AWK" >&5
echo "${ECHO_T}$AWK" >&6
else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
test -n "$AWK" && break
done
echo "$as_me:$LINENO: checking for flex" >&5
echo $ECHO_N "checking for flex... $ECHO_C" >&6
if test "${pgac_cv_path_flex+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
# Let the user override the test
if test -n "$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
if $pgac_candidate --version | grep ' 2\.5\.3$' >/dev/null 2>&1; then
pgac_broken_flex=$pgac_candidate
continue
fi
pgac_cv_path_flex=$pgac_candidate
break 2
fi
fi
done
done
rm -f conftest.l lex.yy.c
: ${pgac_cv_path_flex=no}
fi
fi
echo "$as_me:$LINENO: result: $pgac_cv_path_flex" >&5
echo "${ECHO_T}$pgac_cv_path_flex" >&6
if test x"$pgac_cv_path_flex" = x"no"; then
if test -n "$pgac_broken_flex"; then
{ echo "$as_me:$LINENO: WARNING:
*** The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
*** should get version 2.5.4 or later." >&5
echo "$as_me: WARNING:
*** The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
*** should get version 2.5.4 or later." >&2;}
fi
{ echo "$as_me:$LINENO: WARNING:
*** Without Flex you will not be able to build PostgreSQL from CVS or
*** change any of the scanner definition files. You can obtain Flex from
*** a GNU mirror site. (If you are using the official distribution of
*** PostgreSQL then you do not need to worry about this because the Flex
*** output is pre-generated.)" >&5
echo "$as_me: WARNING:
*** Without Flex you will not be able to build PostgreSQL from CVS or
*** 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.)" >&2;}
fi
if test x"$pgac_cv_path_flex" = x"no"; then
FLEX=
else
FLEX=$pgac_cv_path_flex
fi
echo "$as_me:$LINENO: checking whether ln -s works" >&5
echo $ECHO_N "checking whether ln -s works... $ECHO_C" >&6
LN_S=$as_ln_s
if test "$LN_S" = "ln -s"; then
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
else
echo "$as_me:$LINENO: result: no, using $LN_S" >&5
echo "${ECHO_T}no, using $LN_S" >&6
fi
# Check whether --with-gnu-ld or --without-gnu-ld was given.
if test "${with_gnu_ld+set}" = set; then
@ -4916,45 +4791,6 @@ else
RANLIB="$ac_cv_prog_RANLIB"
fi
# Extract the first word of "tar", so it can be a program name with args.
set dummy tar; ac_word=$2
echo "$as_me:$LINENO: checking for $ac_word" >&5
echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
if test "${ac_cv_path_TAR+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
case $TAR in
[\\/]* | ?:[\\/]*)
ac_cv_path_TAR="$TAR" # Let the user override the test with a path.
;;
*)
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_path_TAR="$as_dir/$ac_word$ac_exec_ext"
echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
;;
esac
fi
TAR=$ac_cv_path_TAR
if test -n "$TAR"; then
echo "$as_me:$LINENO: result: $TAR" >&5
echo "${ECHO_T}$TAR" >&6
else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
if test -n "$ac_tool_prefix"; then
# Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
@ -5054,6 +4890,98 @@ echo "${ECHO_T}no" >&6
# Extract the first word of "tar", so it can be a program name with args.
set dummy tar; ac_word=$2
echo "$as_me:$LINENO: checking for $ac_word" >&5
echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
if test "${ac_cv_path_TAR+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
case $TAR in
[\\/]* | ?:[\\/]*)
ac_cv_path_TAR="$TAR" # Let the user override the test with a path.
;;
*)
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_path_TAR="$as_dir/$ac_word$ac_exec_ext"
echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
;;
esac
fi
TAR=$ac_cv_path_TAR
if test -n "$TAR"; then
echo "$as_me:$LINENO: result: $TAR" >&5
echo "${ECHO_T}$TAR" >&6
else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
echo "$as_me:$LINENO: checking whether ln -s works" >&5
echo $ECHO_N "checking whether ln -s works... $ECHO_C" >&6
LN_S=$as_ln_s
if test "$LN_S" = "ln -s"; then
echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6
else
echo "$as_me:$LINENO: result: no, using $LN_S" >&5
echo "${ECHO_T}no, using $LN_S" >&6
fi
for ac_prog in gawk mawk nawk awk
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
echo "$as_me:$LINENO: checking for $ac_word" >&5
echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
if test "${ac_cv_prog_AWK+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
if test -n "$AWK"; then
ac_cv_prog_AWK="$AWK" # Let the user override the test.
else
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
ac_cv_prog_AWK="$ac_prog"
echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
fi
fi
AWK=$ac_cv_prog_AWK
if test -n "$AWK"; then
echo "$as_me:$LINENO: result: $AWK" >&5
echo "${ECHO_T}$AWK" >&6
else
echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6
fi
test -n "$AWK" && break
done
# Let the user override the search
if test -z "$YACC"; then
for ac_prog in 'bison -y'
do
@ -5095,21 +5023,26 @@ fi
test -n "$YACC" && break
done
fi
if test "$YACC"; then
if $YACC --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
{ echo "$as_me:$LINENO: WARNING:
if test "$YACC"; then
pgac_yacc_version=`$YACC --version 2>/dev/null | sed q`
{ echo "$as_me:$LINENO: using $pgac_yacc_version" >&5
echo "$as_me: using $pgac_yacc_version" >&6;}
if echo "$pgac_yacc_version" | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'
then
{ echo "$as_me:$LINENO: WARNING:
*** The installed version of Bison is too old to use with PostgreSQL.
*** Bison version 1.875 or later is required." >&5
echo "$as_me: WARNING:
*** The installed version of Bison is too old to use with PostgreSQL.
*** Bison version 1.875 or later is required." >&2;}
YACC=""
fi
YACC=""
fi
fi
if test -z "$YACC"; then
{ echo "$as_me:$LINENO: WARNING:
if test -z "$YACC"; then
{ echo "$as_me:$LINENO: WARNING:
*** Without Bison you will not be able to build PostgreSQL from CVS 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
@ -5125,10 +5058,86 @@ echo "$as_me: WARNING:
*** output is pre-generated.) To use a different yacc program (possible,
*** but not recommended), set the environment variable YACC before running
*** 'configure'." >&2;}
fi
# We don't need AC_SUBST(YACC) because AC_PATH_PROG did it
echo "$as_me:$LINENO: checking for flex" >&5
echo $ECHO_N "checking for flex... $ECHO_C" >&6
if test "${pgac_cv_path_flex+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
else
# Let the user override the test
if test -n "$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
if $pgac_candidate --version | grep ' 2\.5\.3$' >/dev/null 2>&1; then
pgac_broken_flex=$pgac_candidate
continue
fi
pgac_cv_path_flex=$pgac_candidate
break 2
fi
fi
done
done
rm -f conftest.l lex.yy.c
: ${pgac_cv_path_flex=no}
fi
fi
echo "$as_me:$LINENO: result: $pgac_cv_path_flex" >&5
echo "${ECHO_T}$pgac_cv_path_flex" >&6
if test x"$pgac_cv_path_flex" = x"no"; then
if test -n "$pgac_broken_flex"; then
{ echo "$as_me:$LINENO: WARNING:
*** The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
*** should get version 2.5.4 or later." >&5
echo "$as_me: WARNING:
*** The Flex version 2.5.3 you have at $pgac_broken_flex contains a bug. You
*** should get version 2.5.4 or later." >&2;}
fi
{ echo "$as_me:$LINENO: WARNING:
*** Without Flex you will not be able to build PostgreSQL from CVS or
*** change any of the scanner definition files. You can obtain Flex from
*** a GNU mirror site. (If you are using the official distribution of
*** PostgreSQL then you do not need to worry about this because the Flex
*** output is pre-generated.)" >&5
echo "$as_me: WARNING:
*** Without Flex you will not be able to build PostgreSQL from CVS or
*** 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.)" >&2;}
FLEX=
else
FLEX=$pgac_cv_path_flex
pgac_flex_version=`$FLEX -V 2>/dev/null`
{ echo "$as_me:$LINENO: using $pgac_flex_version" >&5
echo "$as_me: using $pgac_flex_version" >&6;}
fi
# Extract the first word of "perl", so it can be a program name with args.
set dummy perl; ac_word=$2
echo "$as_me:$LINENO: checking for $ac_word" >&5
@ -25180,22 +25189,22 @@ s,@with_zlib@,$with_zlib,;t t
s,@EGREP@,$EGREP,;t t
s,@ELF_SYS@,$ELF_SYS,;t t
s,@LDFLAGS_SL@,$LDFLAGS_SL,;t t
s,@AWK@,$AWK,;t t
s,@FLEX@,$FLEX,;t t
s,@FLEXFLAGS@,$FLEXFLAGS,;t t
s,@LN_S@,$LN_S,;t t
s,@LD@,$LD,;t t
s,@with_gnu_ld@,$with_gnu_ld,;t t
s,@ld_R_works@,$ld_R_works,;t t
s,@RANLIB@,$RANLIB,;t t
s,@ac_ct_RANLIB@,$ac_ct_RANLIB,;t t
s,@TAR@,$TAR,;t t
s,@STRIP@,$STRIP,;t t
s,@ac_ct_STRIP@,$ac_ct_STRIP,;t t
s,@STRIP_STATIC_LIB@,$STRIP_STATIC_LIB,;t t
s,@STRIP_SHARED_LIB@,$STRIP_SHARED_LIB,;t t
s,@TAR@,$TAR,;t t
s,@LN_S@,$LN_S,;t t
s,@AWK@,$AWK,;t t
s,@YACC@,$YACC,;t t
s,@YFLAGS@,$YFLAGS,;t t
s,@FLEX@,$FLEX,;t t
s,@FLEXFLAGS@,$FLEXFLAGS,;t t
s,@PERL@,$PERL,;t t
s,@perl_archlibexp@,$perl_archlibexp,;t t
s,@perl_privlibexp@,$perl_privlibexp,;t t

34
configure.in
Unescape View File

@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $PostgreSQL: pgsql/configure.in,v 1.521 2007/07/14 11:13:28 mha Exp $
dnl $PostgreSQL: pgsql/configure.in,v 1.522 2007/07/19 17:15:30 tgl Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@ -650,9 +650,6 @@ AC_MSG_NOTICE([using LDFLAGS=$LDFLAGS])
AC_ARG_VAR(LDFLAGS_SL)
AC_PROG_AWK
PGAC_PATH_FLEX
AC_PROG_LN_S
PGAC_PROG_LD
AC_SUBST(LD)
AC_SUBST(with_gnu_ld)
@ -667,33 +664,14 @@ case $host_os in sysv5*)
AC_SUBST(ld_R_works)
esac
AC_PROG_RANLIB
AC_PATH_PROG(TAR, tar)
PGAC_CHECK_STRIP
if test -z "$YACC"; then
AC_CHECK_PROGS(YACC, ['bison -y'])
if test "$YACC"; then
if $YACC --version | sed q | $AWK '{ if ($4 < 1.875) exit 0; else exit 1;}'; then
AC_MSG_WARN([
*** The installed version of Bison is too old to use with PostgreSQL.
*** Bison version 1.875 or later is required.])
YACC=""
fi
fi
AC_PATH_PROG(TAR, tar)
AC_PROG_LN_S
AC_PROG_AWK
if test -z "$YACC"; then
AC_MSG_WARN([
*** Without Bison you will not be able to build PostgreSQL from CVS 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.) To use a different yacc program (possible,
*** but not recommended), set the environment variable YACC before running
*** 'configure'.])
fi
fi
AC_SUBST(YFLAGS)
PGAC_PATH_YACC
PGAC_PATH_FLEX
PGAC_PATH_PERL
if test "$with_perl" = yes; then

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