From: Michael Meskes <meskes@topsystem.de>

Well this is not really a patch. But I mananged to get Linus' old Postgres95
precompiler to compile and work with PostgreSQL. The next step would be to
collect bug/missing feature reports and to put it into the distribution so
that it is made with the standard make procedure.

Warning! So far it is not tested much and it does not install correctly. But
I was able to create a small binary with it.

Author: scrappy

src/interfaces/ecpg/Makefile

@@ -0,0 +1,4 @@
+SUBDIRS = src/include src/lib src/preproc
+
+all install uninstall clean::
+	for i in $(SUBDIRS); do ( cd $$i; make $@ ); done

src/interfaces/ecpg/TODO

@@ -0,0 +1,48 @@
+This list is still from Linus. MM
+
+The variables should be static.
+    
+The preprocessor interface is strange, to say the least It would be better
+with a consistant unix arguments interface, perhaps builtin default
+filenames so they won't have to be given all the time.
+    
+Preprocessor cannot do syntax checking on your SQL statements Whatever you
+write is copied more or less exactly to the postgres95 and you will not be
+able to locate your errors until run-time.
+    
+No restriction to strings only The PQ interface, and most of all the PQexec
+function, that is used by the ecpg relies on that the request is built up as
+a string. In some cases, like when the data contains the null character,
+this will be a serious problem.
+
+There should be different error numbers for the different errors instead of
+just -1 for them all.
+    
+Missing library functions to_date et al.
+    
+Possibility to define records or structs in the declare section in a way
+that the record can be filled from one row in the database. This is a
+simpler way to handle an entire row at a time.
+    
+Oracle has array operations that enhances speed. When implementing it in
+ecpg it is done for compatibility reasons only. For them to improve speed
+would require a lot more insight in the postgres internal mechanisms than I
+possess.
+    
+Oracle has indicator variables that tell if a value is null or if it is
+empty. This largely simplifies array operations and provides for a way to
+hack around some design flaws in the handling of VARCHAR2 (like that an
+empty string isn't distinguishable from a null value). I am not sure if this
+is an Oracle extension or part of the ANSI standard.
+    
+As well as complex types like records and arrays, typedefs would be a good
+thing to take care of.
+    
+To set up a database you need a few scripts with table definitions and other
+configuration parameters. If you have these scripts for an old database you
+would like to just apply them to get a postgres database that works in the
+same way. The functionality could be accomplished with some conversion
+scripts. Speed will never be accomplished in this way. To do this you need a
+bigger insight in the database construction and the use of the database than
+could be realised in a script.
+

src/interfaces/ecpg/config.cache

@@ -0,0 +1,22 @@
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs.  It is not useful on other systems.
+# If it contains results you don't want to keep, you may remove or edit it.
+#
+# By default, configure uses ./config.cache as the cache file,
+# creating it if it does not exist already.  You can give configure
+# the --cache-file=FILE option to use a different cache file; that is
+# what configure does when it calls configure scripts in
+# subdirectories, so they share the cache.
+# Giving --cache-file=/dev/null disables caching, for debugging configure.
+# config.status only pays attention to the cache file if you give it the
+# --recheck option to rerun configure.
+#
+ac_cv_lib_fl_yywrap=${ac_cv_lib_fl_yywrap=yes}
+ac_cv_prog_CC=${ac_cv_prog_CC=gcc}
+ac_cv_prog_LEX=${ac_cv_prog_LEX=flex}
+ac_cv_prog_YACC=${ac_cv_prog_YACC='bison -y'}
+ac_cv_prog_cc_cross=${ac_cv_prog_cc_cross=no}
+ac_cv_prog_cc_g=${ac_cv_prog_cc_g=yes}
+ac_cv_prog_cc_works=${ac_cv_prog_cc_works=yes}
+ac_cv_prog_gcc=${ac_cv_prog_gcc=yes}

src/interfaces/ecpg/config.log

@@ -0,0 +1,12 @@
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+
+configure:526: checking for gcc
+configure:603: checking whether the C compiler (gcc  ) works
+configure:617: gcc -o conftest    conftest.c  1>&5
+configure:637: checking whether the C compiler (gcc  ) is a cross-compiler
+configure:642: checking whether we are using GNU C
+configure:666: checking whether gcc accepts -g
+configure:696: checking for flex
+configure:729: checking for yywrap in -lfl
+configure:775: checking for bison

src/interfaces/ecpg/config.status

@@ -0,0 +1,152 @@
+#! /bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+# on host gauss:
+#
+# ./configure 
+#
+# Compiler output produced by configure, useful for debugging
+# configure, is in ./config.log if it exists.
+
+ac_cs_usage="Usage: ./config.status [--recheck] [--version] [--help]"
+for ac_option
+do
+  case "$ac_option" in
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    echo "running ${CONFIG_SHELL-/bin/sh} ./configure  --no-create --no-recursion"
+    exec ${CONFIG_SHELL-/bin/sh} ./configure  --no-create --no-recursion ;;
+  -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
+    echo "./config.status generated by autoconf version 2.12"
+    exit 0 ;;
+  -help | --help | --hel | --he | --h)
+    echo "$ac_cs_usage"; exit 0 ;;
+  *) echo "$ac_cs_usage"; exit 1 ;;
+  esac
+done
+
+ac_given_srcdir=.
+
+trap 'rm -fr src/include/Makefile src/lib/Makefile src/preproc/Makefile src/preproc/ecpg conftest*; exit 1' 1 2 15
+
+# Protect against being on the right side of a sed subst in config.status.
+sed 's/%@/@@/; s/@%/@@/; s/%g$/@g/; /@g$/s/[\\&%]/\\&/g;
+ s/@@/%@/; s/@@/@%/; s/@g$/%g/' > conftest.subs <<\CEOF
+/^[ 	]*VPATH[ 	]*=[^:]*$/d
+
+s%@CFLAGS@%-g -O2%g
+s%@CPPFLAGS@%%g
+s%@CXXFLAGS@%%g
+s%@DEFS@% %g
+s%@LDFLAGS@%%g
+s%@LIBS@%%g
+s%@exec_prefix@%${prefix}%g
+s%@prefix@%/usr/local%g
+s%@program_transform_name@%s,x,x,%g
+s%@bindir@%${exec_prefix}/bin%g
+s%@sbindir@%${exec_prefix}/sbin%g
+s%@libexecdir@%${exec_prefix}/libexec%g
+s%@datadir@%${prefix}/share%g
+s%@sysconfdir@%${prefix}/etc%g
+s%@sharedstatedir@%${prefix}/com%g
+s%@localstatedir@%${prefix}/var%g
+s%@libdir@%${exec_prefix}/lib%g
+s%@includedir@%${prefix}/include%g
+s%@oldincludedir@%/usr/include%g
+s%@infodir@%${prefix}/info%g
+s%@mandir@%${prefix}/man%g
+s%@CC@%gcc%g
+s%@LEX@%flex%g
+s%@LEXLIB@%-lfl%g
+s%@YACC@%bison -y%g
+s%@TOPSRC@%/home/meskes/data/computer/databases/postgres/pgsql/src/interfaces/ecpg/../..%g
+
+CEOF
+
+# Split the substitutions into bite-sized pieces for seds with
+# small command number limits, like on Digital OSF/1 and HP-UX.
+ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
+ac_file=1 # Number of current file.
+ac_beg=1 # First line for current file.
+ac_end=$ac_max_sed_cmds # Line after last line for current file.
+ac_more_lines=:
+ac_sed_cmds=""
+while $ac_more_lines; do
+  if test $ac_beg -gt 1; then
+    sed "1,${ac_beg}d; ${ac_end}q" conftest.subs > conftest.s$ac_file
+  else
+    sed "${ac_end}q" conftest.subs > conftest.s$ac_file
+  fi
+  if test ! -s conftest.s$ac_file; then
+    ac_more_lines=false
+    rm -f conftest.s$ac_file
+  else
+    if test -z "$ac_sed_cmds"; then
+      ac_sed_cmds="sed -f conftest.s$ac_file"
+    else
+      ac_sed_cmds="$ac_sed_cmds | sed -f conftest.s$ac_file"
+    fi
+    ac_file=`expr $ac_file + 1`
+    ac_beg=$ac_end
+    ac_end=`expr $ac_end + $ac_max_sed_cmds`
+  fi
+done
+if test -z "$ac_sed_cmds"; then
+  ac_sed_cmds=cat
+fi
+
+CONFIG_FILES=${CONFIG_FILES-"src/include/Makefile src/lib/Makefile src/preproc/Makefile src/preproc/ecpg"}
+for ac_file in .. $CONFIG_FILES; do if test "x$ac_file" != x..; then
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case "$ac_file" in
+  *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+       ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+  *) ac_file_in="${ac_file}.in" ;;
+  esac
+
+  # Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories.
+
+  # Remove last slash and all that follows it.  Not all systems have dirname.
+  ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+  if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+    # The file is in a subdirectory.
+    test ! -d "$ac_dir" && mkdir "$ac_dir"
+    ac_dir_suffix="/`echo $ac_dir|sed 's%^\./%%'`"
+    # A "../" for each directory in $ac_dir_suffix.
+    ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
+  else
+    ac_dir_suffix= ac_dots=
+  fi
+
+  case "$ac_given_srcdir" in
+  .)  srcdir=.
+      if test -z "$ac_dots"; then top_srcdir=.
+      else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;;
+  /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;;
+  *) # Relative path.
+    srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix"
+    top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  esac
+
+
+  echo creating "$ac_file"
+  rm -f "$ac_file"
+  configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure."
+  case "$ac_file" in
+  *Makefile*) ac_comsub="1i\\
+# $configure_input" ;;
+  *) ac_comsub= ;;
+  esac
+
+  ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+  sed -e "$ac_comsub
+s%@configure_input@%$configure_input%g
+s%@srcdir@%$srcdir%g
+s%@top_srcdir@%$top_srcdir%g
+" $ac_file_inputs | (eval "$ac_sed_cmds") > $ac_file
+fi; done
+rm -f conftest.s*
+
+
+
+exit 0