autobuild doc if possible patch by (Nicolas Boos <nicolas.boos at wanadoo dot fr>)

Originally committed as revision 3288 to svn://svn.ffmpeg.org/ffmpeg/trunk

Makefile

@@ -70,11 +70,15 @@ else
 TEST=test
 endif
 
+ifeq ($(BUILD_DOC),yes)
+DOC=documentation
+endif
+
 OBJS = ffmpeg.o ffserver.o cmdutils.o ffplay.o
 SRCS = $(OBJS:.o=.c) $(ASM_OBJS:.o=.s)
 FFLIBS = -L./libavformat -lavformat -L./libavcodec -lavcodec
 
-all: lib $(PROG) $(PROGTEST) $(VHOOK) $(QTFASTSTART)
+all: lib $(PROG) $(PROGTEST) $(VHOOK) $(QTFASTSTART) $(DOC)
 
 lib:
 	$(MAKE) -C libavcodec all
@@ -112,6 +116,9 @@ ffplay.o: ffplay.c
 videohook: .libs
 	$(MAKE) -C vhook all
 
+documentation:
+	$(MAKE) -C doc all
+
 .PHONY: install
 
 install: all install-man $(INSTALLVHOOK)

configure

@@ -900,6 +900,14 @@ fi
 fi
 fi
 
+##########################################
+# texi2html probe
+
+texi2html=no
+if texi2html -version >/dev/null 2>&1; then
+texi2html=yes
+fi
+
 case "`$cc -v 2>&1 | grep version`" in
     *gcc*)
 	CFLAGS="-Wall $CFLAGS"
@@ -1123,6 +1131,9 @@ if test "$sdl" = "yes" ; then
   echo "SDL_LIBS=`sdl-config --libs`" >> config.mak
   echo "SDL_CFLAGS=`sdl-config --cflags`" >> config.mak
 fi
+if test "$texi2html" = "yes"; then
+  echo "BUILD_DOC=yes" >> config.mak
+fi
 if test "$have_lrintf" = "yes" ; then
   echo "#define HAVE_LRINTF 1" >> $TMPH
 fi