configure: --enable-shared for libx264.so

git-svn-id: svn://svn.videolan.org/x264/trunk@467 df754926-b1dd-0310-bc7b-ec298dee348c

Makefile

@@ -67,6 +67,9 @@ libx264.a: .depend $(OBJS) $(OBJASM)
 	ar rc libx264.a $(OBJS) $(OBJASM)
 	ranlib libx264.a
 
+$(SONAME): .depend $(OBJS) $(OBJASM)
+	$(CC) -shared -o $@ $(OBJS) $(OBJASM) -Wl,-soname,$(SONAME)
+
 x264$(EXE): $(OBJCLI) libx264.a 
 	$(CC) -o $@ $+ $(LDFLAGS)
 
@@ -120,7 +123,7 @@ fprofiled:
 endif
 
 clean:
-	rm -f $(OBJS) $(OBJASM) $(OBJCLI) *.a x264 x264.exe .depend TAGS
+	rm -f $(OBJS) $(OBJASM) $(OBJCLI) $(SONAME) *.a x264 x264.exe .depend TAGS
 	rm -f checkasm checkasm.exe tools/checkasm.o
 	rm -f tools/avc2avi tools/avc2avi.exe tools/avc2avi.o
 	rm -rf vfw/build/cygwin/bin
@@ -130,7 +133,7 @@ clean:
 distclean: clean
 	rm -f config.mak config.h vfw/build/cygwin/config.mak x264.pc
 
-install: x264
+install: x264 $(SONAME)
 	install -d $(DESTDIR)$(bindir) $(DESTDIR)$(includedir)
 	install -d $(DESTDIR)$(libdir) $(DESTDIR)$(libdir)/pkgconfig
 	install -m 644 x264.h $(DESTDIR)$(includedir)
@@ -138,10 +141,13 @@ install: x264
 	install -m 644 x264.pc $(DESTDIR)$(libdir)/pkgconfig
 	install x264 $(DESTDIR)$(bindir)
 	ranlib $(DESTDIR)$(libdir)/libx264.a
+	$(if $(SONAME), ln -sf $(DESTDIR)$(libdir)/$(SONAME) $(DESTDIR)$(libdir)/libx264.so)
+	$(if $(SONAME), install -m 755 $(SONAME) $(DESTDIR)$(libdir))
 
 uninstall:
 	rm -f $(DESTDIR)$(includedir)/x264.h $(DESTDIR)$(libdir)/libx264.a
 	rm -f $(DESTDIR)$(bindir)/x264 $(DESTDIR)$(libdir)/pkgconfig/x264.pc
+	$(if $(SONAME), rm -f $(DESTDIR)$(libdir)/$(SONAME) $(DESTDIR)$(libdir)/libx264.so)
 
 etags: TAGS
 

configure

@@ -15,6 +15,7 @@ echo "  --enable-debug           adds -g, doesn't strip"
 echo "  --enable-gprof           adds -pg, doesn't strip"
 echo "  --enable-visualize       enables visualization (X11 only)"
 echo "  --enable-pic             build position-independent code"
+echo "  --enable-shared          build libx264.so"
 echo "  --extra-asflags=EASFLAGS add EASFLAGS to ASFLAGS"
 echo "  --extra-cflags=ECFLAGS   add ECFLAGS to CFLAGS"
 echo "  --extra-ldflags=ELDFLAGS add ELDFLAGS to LDFLAGS"
@@ -51,6 +52,7 @@ gprof="no"
 pic="no"
 vfw="no"
 vis="no"
+shared="no"
 
 CC="gcc"
 CFLAGS="-Wall -I. -O4 -ffast-math -D__X264__"
@@ -92,13 +94,11 @@ case "$UNAMES" in
     LDFLAGS="$LDFLAGS -mno-cygwin"
     EXE=".exe"
     DEVNULL="NUL"
-    vfw="yes"
     ;;
   MINGW*)
     SYS="MINGW"
     EXE=".exe"
     DEVNULL="NUL"
-    vfw="yes"
     ;;
   SunOS)
     SYS="SunOS"
@@ -242,8 +242,6 @@ for opt do
             gprof="yes"
             ;;
         --enable-pic)
-            CFLAGS="$CFLAGS -fPIC"
-            ASFLAGS="$ASFLAGS -D__PIC__"
             pic="yes"
             ;;
         --enable-vfw)
@@ -252,6 +250,12 @@ for opt do
         --disable-vfw)
             vfw="no"
             ;;
+        --enable-shared)
+            shared="yes"
+            if [ $ARCH = "X86_64" -o $ARCH = "PPC" -o $ARCH = "ALPHA" ] ; then
+                pic="yes"
+            fi
+            ;;
         --enable-visualize)
             LDFLAGS="$LDFLAGS -L/usr/X11R6/lib -lX11"
             CFLAGS="$CFLAGS -DVISUALIZE=1"
@@ -311,6 +315,11 @@ if [ "$avis_input" = "yes" ] ; then
     LDFLAGS="$LDFLAGS -lvfw32"
 fi
 
+if [ "$pic" = "yes" ] ; then
+    CFLAGS="$CFLAGS -fPIC"
+    ASFLAGS="$ASFLAGS -D__PIC__"
+fi
+
 if [ "$debug" != "yes" -a "$gprof" != "yes" ]; then
     CFLAGS="$CFLAGS -s -fomit-frame-pointer"
     LDFLAGS="$LDFLAGS -s"
@@ -357,6 +366,12 @@ EOF
     echo "default: x264vfw.dll" >> config.mak
 fi
 
+if [ "$shared" = "yes" ]; then
+    API=`grep '#define X264_BUILD' < x264.h | cut -f 3 -d ' '`
+    echo "SONAME=libx264.so.$API" >> config.mak
+    echo 'default: $(SONAME)' >> config.mak
+fi
+
 ./version.sh
 
 cat > x264.pc << EOF
@@ -382,6 +397,7 @@ echo "vfw:        $vfw"
 echo "debug:      $debug"
 echo "gprof:      $gprof"
 echo "PIC:        $pic"
+echo "shared:     $shared"
 echo "visualize:  $vis"
 echo
 echo "You can run 'make' or 'make fprofiled' now."