[PATCH] Cygwin: doc: Explciitly name the output when building .info files

[Jon Turney]

This works arounda bug in docbook2x-texi seen with current bash in
Fedora 42 during cross-building.

If the -output-dir option to db2x_texixml isn't specified (always the
case when invoked by docbook2x-texi), then the script attempts cd ''
which is now an error ("cd: null directory") rather being treated as
equivalent to cd '.'

Instead, explicitly name the output file when building .info files.
---
 winsup/doc/Makefile.am | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/winsup/doc/Makefile.am b/winsup/doc/Makefile.am
index 394c43596..043bbcba4 100644
--- a/winsup/doc/Makefile.am
+++ b/winsup/doc/Makefile.am
@@ -24,7 +24,7 @@ XMLTO_HTML_CHUNK_QUIET=$(XMLTO_HTML_CHUNK_QUIET_$(V))
 XMLTO_MAN_QUIET_=--stringparam man.output.quietly=1
 XMLTO_MAN_QUIET=$(XMLTO_MAN_QUIET_$(V))
 
-DOCBOOK2XTEXI=@DOCBOOK2XTEXI@ --xinclude --info --utf8trans-map=charmap
+DOCBOOK2XTEXI=@DOCBOOK2XTEXI@ --xinclude --info --utf8trans-map=charmap 
--to-stdout
 
 -include Makefile.dep
 
@@ -142,7 +142,7 @@ utils2man.stamp: $(cygwin-ug-net_SOURCES) man.xsl
        @touch $@
 
 cygwin-ug-net.info: $(cygwin-ug-net_SOURCES) charmap
-       $(AM_V_GEN)$(DOCBOOK2XTEXI) $(srcdir)/cygwin-ug-net.xml --string-param 
output-file=cygwin-ug-net
+       $(AM_V_GEN)$(DOCBOOK2XTEXI) $(srcdir)/cygwin-ug-net.xml --string-param 
output-file=cygwin-ug-net >$@
 
 cygwin-api/cygwin-api.html: $(cygwin-api_SOURCES) html.xsl
        $(AM_V_GEN)$(XMLTO) html -o cygwin-api/ -m $(srcdir)/html.xsl 
$(XMLTO_HTML_CHUNK_QUIET) $<
@@ -155,7 +155,7 @@ api2man.stamp: $(cygwin-api_SOURCES) man.xsl
        @touch $@
 
 cygwin-api.info: $(cygwin-api_SOURCES) charmap
-       $(AM_V_GEN)$(DOCBOOK2XTEXI) $(srcdir)/cygwin-api.xml --string-param 
output-file=cygwin-api
+       $(AM_V_GEN)$(DOCBOOK2XTEXI) $(srcdir)/cygwin-api.xml --string-param 
output-file=cygwin-api >$@
 
 # this generates a custom charmap for docbook2x-texi which has a mapping for 
&reg;
 charmap:
-- 
2.51.0