visibility - autotools part (./configure --enable-visibility)

git-svn-id: https://tesseract-ocr.googlecode.com/svn/trunk@690 d0cd1f9f-072b-0410-8dd7-cf729c803f20

AUTHORS

-Ray Smith (lead developer) <theraysmith@users.sourceforge.net>
+Ray Smith (lead developer) <theraysmith@gmail.com>
 Phil Cheatle
 Simon Crouch
 Dan Johnson

Makefile.am

 ACLOCAL_AMFLAGS = -I m4
-SUBDIRS = ccutil viewer cutil image ccstruct dict classify wordrec neural_networks/runtime textord cube ccmain api . training java tessdata testing doc
+SUBDIRS = ccutil viewer cutil image ccstruct dict classify wordrec neural_networks/runtime textord cube ccmain api . java tessdata testing doc
+# training subdir can not be build with -fvisibility at the moment
+if !VISIBILITY
+SUBDIRS += training
+endif
+
 #if USING_GETTEXT
 #SUBDIRS += po
 #AM_CPPFLAGS = -DLOCALEDIR=\"$(localedir)\"

api/Makefile.am

@@ -4,6 +4,10 @@ AM_CPPFLAGS = -DLOCALEDIR=\"$(localedir)\"\
     -I$(top_srcdir)/textord -I$(top_srcdir)/dict \
     -I$(top_srcdir)/classify -I$(top_srcdir)/ccmain \
     -I$(top_srcdir)/wordrec -I$(top_srcdir)/cutil
+    
+if VISIBILITY
+AM_CPPFLAGS += -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     apitypes.h baseapi.h tesseractmain.h
@@ -28,10 +32,14 @@ libtesseract_api_la_LIBADD = \
     $(top_srcdir)/viewer/libtesseract_viewer.la \
     $(top_srcdir)/ccutil/libtesseract_ccutil.la
 endif
+libtesseract_api_la_CPPFLAGS = $(AM_CPPFLAGS)
+if VISIBILITY
+libtesseract_api_la_CPPFLAGS += -DTESS_EXPORTS
+endif
 libtesseract_api_la_SOURCES = baseapi.cpp
 
 lib_LTLIBRARIES += libtesseract.la
-libtesseract_la_LDFLAGS =
+libtesseract_la_LDFLAGS = 
 libtesseract_la_SOURCES =
 # Dummy C++ source to cause C++ linking.
 # see http://www.gnu.org/s/hello/manual/automake/Libtool-Convenience-Libraries.html#Libtool-Convenience-Libraries
@@ -52,8 +60,11 @@ libtesseract_la_LIBADD = \
     $(top_srcdir)/ccutil/libtesseract_ccutil.la
 
 libtesseract_la_LDFLAGS += -version-info $(GENERIC_LIBRARY_VERSION)
-libtesseract_la_LDFLAGS += -L./ -L../ -L../api -L../ccutil -L../viewer -L../cutil -L../image -L../ccstruct -L../dict -L../classify -L../wordrec -L../neural_networks/runtime -L../textord -L../cube -L../ccmain
 
 bin_PROGRAMS = tesseract
 tesseract_SOURCES = $(top_srcdir)/api/tesseractmain.cpp
 tesseract_LDADD = libtesseract.la
+tesseract_CPPFLAGS = $(AM_CPPFLAGS)
+if VISIBILITY
+tesseract_CPPFLAGS += -DTESS_IMPORTS
+endif

ccmain/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -DUSE_STD_NAMESPACE \
     -I$(top_srcdir)/ccutil -I$(top_srcdir)/ccstruct \
@@ -7,6 +6,11 @@ AM_CPPFLAGS = \
     -I$(top_srcdir)/wordrec -I$(top_srcdir)/cutil \
     -I$(top_srcdir)/neural_networks/runtime -I$(top_srcdir)/cube \
     -I$(top_srcdir)/textord
+    
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     control.h cube_reco_context.h cubeclassifier.h \

ccstruct/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -I$(top_srcdir)/ccutil -I$(top_srcdir)/cutil \
     -I$(top_srcdir)/image -I$(top_srcdir)/viewer
+    
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     blckerr.h blobbox.h blobs.h blread.h boxread.h boxword.h ccstruct.h coutln.h crakedge.h \

ccutil/Makefile.am

 SUBDIRS =
 AM_CXXFLAGS = -DTESSDATA_PREFIX=@datadir@/
 
+if VISIBILITY
+AM_CXXFLAGS += -fvisibility=hidden -fvisibility-inlines-hidden
+AM_CPPFLAGS += -DTESS_EXPORTS
+endif
+
 EXTRA_DIST = mfcpch.cpp
 
 include_HEADERS = \

classify/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -I$(top_srcdir)/cutil -I$(top_srcdir)/ccutil \
     -I$(top_srcdir)/ccstruct -I$(top_srcdir)/dict \
     -I$(top_srcdir)/image -I$(top_srcdir)/viewer
+    
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     adaptive.h baseline.h blobclass.h chartoname.h \

configure.ac

@@ -7,7 +7,7 @@
 # ----------------------------------------
 
 AC_PREREQ(2.50)
-AC_INIT([tesseract], [3.02], [theraysmith@gmail.com])
+AC_INIT([tesseract], [3.02], [http://code.google.com/p/tesseract-ocr/issues/list])
 AC_CONFIG_MACRO_DIR([m4])
 AC_REVISION($Id: configure.ac,v 1.4 2007/02/02 22:38:17 theraysmith Exp $)
 AC_CONFIG_AUX_DIR(config)
@@ -98,6 +98,17 @@ if test "$enable_embedded" = "yes"; then
   AC_SUBST([AM_CPPFLAGS], [-DEMBEDDED])
 fi
 
+# check whether to build tesseract with -fvisibility=hidden -fvisibility-inlines-hidden
+# http://gcc.gnu.org/wiki/Visibility
+# http://groups.google.com/group/tesseract-dev/browse_thread/thread/976645ae98189127
+AC_MSG_CHECKING(--enable-visibility argument)
+AC_ARG_ENABLE([visibility],
+    [AC_HELP_STRING([--enable-visibility],[enable experimental build with fvisibility (default=no)])],
+    [enable_visibility=$enableval],
+    [enable_visibility="no"])
+AC_MSG_RESULT($enable_visibility)
+AM_CONDITIONAL([VISIBILITY], [test "$enable_visibility" = "yes"])
+
 # check whether to build multiple libraries
 AC_MSG_CHECKING(--enable-multiple-libraries argument)
 AC_ARG_ENABLE([multiple-libraries],

cube/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -DUSE_STD_NAMESPACE \
     -I$(top_srcdir)/cutil -I$(top_srcdir)/ccutil \
@@ -7,6 +6,11 @@ AM_CPPFLAGS = \
     -I$(top_srcdir)/textord -I$(top_srcdir)/wordrec \
     -I$(top_srcdir)/neural_networks/runtime \
     -I$(top_srcdir)/image -I$(top_srcdir)/viewer
+        
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     altlist.h beam_search.h bmp_8.h cached_file.h \

cutil/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = -I$(top_srcdir)/ccutil -I$(top_srcdir)/viewer
 
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
+
 include_HEADERS = \
     bitvec.h callcpp.h const.h cutil.h cutil_class.h danerror.h efio.h \
     emalloc.h freelist.h globals.h listio.h \

dict/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = -I$(top_srcdir)/cutil -I$(top_srcdir)/ccutil \
     -I$(top_srcdir)/ccstruct -I$(top_srcdir)/viewer -I$(top_srcdir)/image
+    
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     dawg.h dict.h matchdefs.h \

image/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = -I$(top_srcdir)/ccutil -I$(top_srcdir)/viewer
+    
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     image.h img.h imgerrs.h imgs.h \

neural_networks/runtime/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -DUSE_STD_NAMESPACE \
     -I$(top_srcdir)/cutil -I$(top_srcdir)/ccutil \
     -I$(top_srcdir)/ccstruct -I$(top_srcdir)/dict \
     -I$(top_srcdir)/image -I$(top_srcdir)/viewer
 
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
+
 include_HEADERS = \
     input_file_buffer.h neural_net.h neuron.h
 

textord/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -I$(top_srcdir)/ccstruct -I$(top_srcdir)/ccutil \
     -I$(top_srcdir)/image -I$(top_srcdir)/viewer \
     -I$(top_srcdir)/ccmain -I$(top_srcdir)/wordrec -I$(top_srcdir)/api \
     -I$(top_srcdir)/cutil -I$(top_srcdir)/classify -I$(top_srcdir)/dict
+        
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
+
 
 include_HEADERS = \
     alignedblob.h bbgrid.h blkocc.h blobgrid.h \

viewer/Makefile.am

-SUBDIRS =
-AM_CPPFLAGS =
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
 
 include_HEADERS = \
     scrollview.h svmnode.h svutil.h
@@ -13,5 +15,3 @@ endif
 
 libtesseract_viewer_la_SOURCES = \
     scrollview.cpp svmnode.cpp svutil.cpp svpaint.cpp
-
-

wordrec/Makefile.am

-SUBDIRS =
 AM_CPPFLAGS = \
     -I$(top_srcdir)/ccstruct -I$(top_srcdir)/ccutil \
     -I$(top_srcdir)/cutil -I$(top_srcdir)/classify \
     -I$(top_srcdir)/image -I$(top_srcdir)/dict \
     -I$(top_srcdir)/viewer
 
+if VISIBILITY
+AM_CPPFLAGS += -DTESS_EXPORTS \
+    -fvisibility=hidden -fvisibility-inlines-hidden
+endif
+
 include_HEADERS = \
     associate.h bestfirst.h chop.h \
     chopper.h closed.h drawfx.h findseam.h gradechop.h \