From fb61ba77bc66ff07fbeb7fb4abbb5f756af7e955 Mon Sep 17 00:00:00 2001
From: David Jones
Date: Thu, 16 Dec 2004 12:17:13 +0000
Subject: Mps: expgen script to generate a list of exported symbols.  and

its output.

Copied from Perforce
 Change: 133985
 ServerID: perforce.ravenbrook.com

---
 mps/code/expgen.sh | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100755 mps/code/expgen.sh

(limited to 'mps/code/expgen.sh')

diff --git a/mps/code/expgen.sh b/mps/code/expgen.sh
new file mode 100755
index 00000000000..54c8daca2dc
--- /dev/null
+++ b/mps/code/expgen.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+# $Header$
+#
+# Copyright (C) 2004 Ravenbrook Limited.  All rights reserved.
+#
+# expgen.sh
+#
+# Export Generator
+#
+# This is a script to generate the a list of exports that is required
+# for Windows DLL creation.
+#
+# It processed the mps header files and produces a .DEF file that is
+# suitable for use with the linker when producing a DLL file on Windows.
+#
+# When run, this script produces the following output files:
+# expgen - a plain text list of functions declared in the header files.
+# w3gen.def - a .def file suitable for use in the linker stage when
+# building a Windows .DLL.
+#
+#
+# Design
+#
+# The script works by using the -fdump-translation-unit option of gcc.
+# This produces a more easily parseable rendering of the header files.
+# A fairly simple awk script is used to process the output.
+#
+#
+# Dependencies
+#
+# This script currently depends fairly heavily on being run in a
+# Unix-like environment with access to the GNU compiler.
+#
+# It's also fairly sensitive to changes in the undocumented format
+# produced by gcc -fdump-translation-unit.  Hopefully it is fairly easy
+# to adapt to changes in this output.
+#
+# Assumes it can freely write to the files "fun", "name-s".
+#
+#
+# Awk crash course
+#
+# Awk processes files line-by-line, thus the entire script is executed
+# for each line of the input file (more complex awk scripts can control
+# this using "next" and "getline" and so on).
+#
+# In awk $exp identifies a field within the line.  $1 is the first
+# field, $2 is the second and so on.  $0 is the whole line.  By default
+# fields are separated by whitespace.
+#
+# string ~ RE is a matching expression and evaulated to true iff the
+# string is matched by the regular expression.
+#
+# REFERENCES
+#
+# [SUSV3] Single UNIX Specification Version 3,
+# http://www.unix.org/single_unix_specification/
+#
+# For documenation of the standard utilities: sh, awk, join, sort, sed
+#
+# [MSDN-LINKER-DEF] Module-Definition (.def) files,
+# http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/html/_core_module.2d.definition_files.asp
+#
+# For documentation on the format of .def files.
+
+tu () {
+  # if invoked on a file called spong.h will produce a file named
+  # spong.h.tu
+  gcc -fdump-translation-unit -o /dev/null "$@"
+}
+
+# This list of header files is produced by
+# awk '/^copy.*\.h/{print $2}' w3build.bat
+# followed by manual removal of mpsw3.h mpswin.h.
+# The functions declared in mpsw3.h have to be added to the .def file by
+# hand later in this script.
+f='mps.h
+mpsavm.h
+mpsacl.h
+mpscamc.h
+mpscams.h
+mpscawl.h
+mpsclo.h
+mpscmv.h
+mpscmvff.h
+mpscsnc.h
+mpsio.h
+mpslib.h
+mpstd.h'
+
+tu $f
+
+>expgen
+
+for a in $f
+do
+  >fun
+  awk '
+    $2=="function_decl" && $7=="srcp:" && $8 ~ /^'$a':/ {print $4 >"fun"}
+    $2=="identifier_node"{print $1,$4}
+  ' $a.tu |
+  sort -k 1 >name-s
+
+  echo ';' $a >>expgen
+  sort -k 1 fun |
+    join -o 2.2 - name-s >>expgen
+done
+
+{
+  printf '%sHeader%s\n' '$' '$'
+  echo '; DO NOT EDIT.  Automatically generated by $Header$' | sed 's/\$/!/g'
+  echo 'EXPORTS'
+  cat expgen
+  # This is where we manually the functions declared in mpsw3.h
+  echo ';' mpsw3.h - by hand
+  echo mps_SEH_filter
+  echo mps_SEH_handler
+} > w3gen.def
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