From 797969983d38149f4a0ea1f960becfac88fc2b8e Mon Sep 17 00:00:00 2001
From: "Ondrej Zajicek (work)" <santiago@crfreenet.org>
Date: Tue, 19 Feb 2019 18:32:45 +0100
Subject: [PATCH] Doc: Detect SP/OpenSP automatically

---
 INSTALL        | 5 -----
 doc/sgml2html  | 4 ++++
 doc/sgml2latex | 4 ++++
 doc/sgml2txt   | 4 ++++
 4 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/INSTALL b/INSTALL
index b9ca3e00..b3f66f13 100644
--- a/INSTALL
+++ b/INSTALL
@@ -40,8 +40,3 @@ For compiling BIRD documentation you also need:
 
  - Linuxdoc-Tools
  - LaTeX
-
-Note that build scripts for BIRD documentation expects 'nsgmls' from
-James Clark's SP suite, while modern distributions use 'onsgmls' from
-OpenSP suite. It is possible to build BIRD documentation with OpenSP
-tools, but it requires manually tweaking paths in doc/sgml2* scripts.
diff --git a/doc/sgml2html b/doc/sgml2html
index 6072a7a3..ea8e8c92 100755
--- a/doc/sgml2html
+++ b/doc/sgml2html
@@ -34,6 +34,10 @@ $progs = {
   "GROFFMACRO" => "-ms",
   "AWK" => "/usr/share/linuxdoc-tools/awkwhich"
 };
+
+if (! -x $progs->{"NSGMLS"})
+  { $progs->{"NSGMLS"} = "/usr/bin/onsgmls"; }
+
 $ENV{"SGML_CATALOG_FILES"} = "$DataDir/dtd/catalog" .
   (defined $ENV{SGML_CATALOG_FILES} ? ":$ENV{SGML_CATALOG_FILES}" : "");
 
diff --git a/doc/sgml2latex b/doc/sgml2latex
index c48f787d..79c6df03 100755
--- a/doc/sgml2latex
+++ b/doc/sgml2latex
@@ -34,6 +34,10 @@ $progs = {
   "GROFFMACRO" => "-ms",
   "AWK" => "/usr/share/linuxdoc-tools/awkwhich"
 };
+
+if (! -x $progs->{"NSGMLS"})
+  { $progs->{"NSGMLS"} = "/usr/bin/onsgmls"; }
+
 $ENV{"SGML_CATALOG_FILES"} = "$DataDir/dtd/catalog" .
   (defined $ENV{SGML_CATALOG_FILES} ? ":$ENV{SGML_CATALOG_FILES}" : "");
 
diff --git a/doc/sgml2txt b/doc/sgml2txt
index af0bcb49..013479fe 100755
--- a/doc/sgml2txt
+++ b/doc/sgml2txt
@@ -34,6 +34,10 @@ $progs = {
   "GROFFMACRO" => "-ms",
   "AWK" => "/usr/share/linuxdoc-tools/awkwhich"
 };
+
+if (! -x $progs->{"NSGMLS"})
+  { $progs->{"NSGMLS"} = "/usr/bin/onsgmls"; }
+
 $ENV{"SGML_CATALOG_FILES"} = "$DataDir/dtd/catalog" .
   (defined $ENV{SGML_CATALOG_FILES} ? ":$ENV{SGML_CATALOG_FILES}" : "");