[passepartout] check for xsltproc in configure

[Sven Herzberg <herzi src gnome org>]

commit 8d109d0157cb462f6c385e5a545e0f0169b9e0c4
Author: Sven Herzberg <herzi lanedo com>
Date:   Tue Apr 28 15:00:44 2009 +0200

    check for xsltproc in configure
    
    * configure.ac: check for xsltproc
    * help/Makefile.am,
    * src/xml2ps/Makefile.am: use the new $(XSLTPROC) variable
---
 configure.ac           |    6 ++++++
 help/Makefile.am       |    4 ++--
 src/xml2ps/Makefile.am |    2 +-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/configure.ac b/configure.ac
index 887cfce..87615d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -125,6 +125,12 @@ if test "${XMLLINT}" = "no"; then
 		      http://xmlsoft.org/downloads.html])
 fi
 
+AC_PATH_PROGS(XSLTPROC,[xsltproc],[no])
+if test "${XSLTPROC}" = "no"; then
+	AC_MSG_ERROR([xsltproc not fount, please install libxslt from
+		      http://xmlsoft.org/XSLT/downloads.html])
+fi
+
 dnl  ---------------
 dnl | documentation |
 dnl  ---------------
diff --git a/help/Makefile.am b/help/Makefile.am
index cbcf747..6b6c69c 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -62,11 +62,11 @@ SUFFIXES=.txt .xml .html
 
 .xml.txt:
 	@echo "[GEN]  $@"
-	(mkdir -p C && cd C && xsltproc --path . -o $@ ../$(srcdir)/$(DOCBOOK2TXT) ../$<)
+	(mkdir -p C && cd C && $(XSLTPROC) --path . -o $@ ../$(srcdir)/$(DOCBOOK2TXT) ../$<)
 
 .xml.html:
 	@echo "[GEN]  $@"
-	(mkdir -p C && cd C && xsltproc --path . -o $@ ../$(srcdir)/$(DOCBOOK2HTML) ../$<)
+	(mkdir -p C && cd C && $(XSLTPROC) --path . -o $@ ../$(srcdir)/$(DOCBOOK2HTML) ../$<)
 
 EXTRA_DIST=$(dist_built_in) $(DOCBOOK2TXT) $(DOCBOOK2HTML)
 CLEANFILES=$(nodist_doc_DATA)
diff --git a/src/xml2ps/Makefile.am b/src/xml2ps/Makefile.am
index c7ced35..2927097 100644
--- a/src/xml2ps/Makefile.am
+++ b/src/xml2ps/Makefile.am
@@ -29,7 +29,7 @@ dist_xml_DATA=\
 	$(NULL)
 
 %.x2p: %.xhtml $(top_srcdir)/data/xhtml.xslt
-	xsltproc $(top_srcdir)/data/xhtml.xslt $< > $@
+	$(XSLTPROC) $(top_srcdir)/data/xhtml.xslt $< > $@
 
 %.pdf: %.x2p
 	./xml2ps --output-format=pdf -p 300x400 < $< > $@