diff --git a/zlib-lfs.patch b/zlib-lfs.patch
index f9d06dc..0924150 100644
--- a/zlib-lfs.patch
+++ b/zlib-lfs.patch
@@ -1,7 +1,6 @@
-diff -up zlib-1.2.5/zlib.h.pom zlib-1.2.5/zlib.h
---- zlib-1.2.5/zlib.h.pom	2010-04-20 06:12:48.000000000 +0200
-+++ zlib-1.2.5/zlib.h	2010-06-16 13:08:59.000000000 +0200
-@@ -1578,7 +1578,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF(
+--- zlib.h.orig
++++ zlib.h
+@@ -1582,7 +1582,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF(
  #  define gzoffset gzoffset64
  #  define adler32_combine adler32_combine64
  #  define crc32_combine crc32_combine64
@@ -10,4 +9,19 @@ diff -up zlib-1.2.5/zlib.h.pom zlib-1.2.5/zlib.h
       ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
       ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int));
       ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));
-
+--- Makefile.in.orig
++++ Makefile.in
+@@ -133,11 +133,11 @@ minigzip64.o: minigzip.c zlib.h zconf.h
+ 
+ .c.lo:
+ 	-@mkdir objs 2>/dev/null || test -d objs
+-	$(CC) $(SFLAGS) -DPIC -c -o objs/$*.o $<
++	$(CC) $(SFLAGS) $(CFLAGS) -DPIC -c -o objs/$*.o $<
+ 	-@mv objs/$*.o $@
+ 
+ $(SHAREDLIBV): $(PIC_OBJS)
+-	$(LDSHARED) $(SFLAGS) -o $@ $(PIC_OBJS) $(LDSHAREDLIBC) $(LDFLAGS)
++	$(LDSHARED) $(SFLAGS) $(CFLAGS) -o $@ $(PIC_OBJS) $(LDSHAREDLIBC) $(LDFLAGS)
+ 	rm -f $(SHAREDLIB) $(SHAREDLIBM)
+ 	ln -s $@ $(SHAREDLIB)
+ 	ln -s $@ $(SHAREDLIBM)
diff --git a/zlib-parallel.patch b/zlib-parallel.patch
new file mode 100644
index 0000000..774a7c3
--- /dev/null
+++ b/zlib-parallel.patch
@@ -0,0 +1,13 @@
+Index: zlib-1.2.5/Makefile.in
+===================================================================
+--- zlib-1.2.5.orig/Makefile.in
++++ zlib-1.2.5/Makefile.in
+@@ -136,7 +136,7 @@ minigzip64.o: minigzip.c zlib.h zconf.h
+ 	$(CC) $(SFLAGS) $(CFLAGS) -DPIC -c -o objs/$*.o $<
+ 	-@mv objs/$*.o $@
+ 
+-$(SHAREDLIBV): $(PIC_OBJS)
++$(SHAREDLIBV): $(PIC_OBJS) libz.a
+ 	$(LDSHARED) $(SFLAGS) $(CFLAGS) -o $@ $(PIC_OBJS) $(LDSHAREDLIBC) $(LDFLAGS)
+ 	rm -f $(SHAREDLIB) $(SHAREDLIBM)
+ 	ln -s $@ $(SHAREDLIB)
diff --git a/zlib.changes b/zlib.changes
index 59eec00..df30a8e 100644
--- a/zlib.changes
+++ b/zlib.changes
@@ -1,3 +1,13 @@
+-------------------------------------------------------------------
+Tue Dec 21 16:12:56 CET 2010 - meissner@suse.de
+
+- Add dependency to make it build in a parallel world.
+
+-------------------------------------------------------------------
+Tue Dec  7 17:18:43 UTC 2010 - cristian.rodriguez@opensuse.org
+
+- use compiler profile information to make libz slightly faster. 
+
 -------------------------------------------------------------------
 Tue Sep 21 21:48:23 UTC 2010 - dimstar@opensuse.org
 
diff --git a/zlib.spec b/zlib.spec
index 6f367f9..48733b0 100644
--- a/zlib.spec
+++ b/zlib.spec
@@ -38,6 +38,8 @@ Source2:        baselibs.conf
 Patch0:         zlib-1.2.2-format.patch
 # PATCH-FIX-UPSTREAM zlib-lfs.patch dimstar@opensuse.org -- Properly define large file support. Patch taken from gentoo
 Patch1:         zlib-lfs.patch
+# PATCH-FIX-JENGELH-PARALLEL-MAKE zlib-parallel.patch meissner@novell.com -- shared library links with libz.a
+Patch2:         zlib-parallel.patch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 BuildRequires:  pkgconfig
 
@@ -80,14 +82,26 @@ libraries.
 %prep
 %setup -q
 %patch0
-%patch1 -p1
+%patch1
+%patch2 -p1
 
 %build
-CFLAGS="%{optflags}" ./configure --shared
+%if %{do_profiling}
+profiledir=$(mktemp -d)
+trap "rm -rf $profiledir" EXIT
+./configure --shared
+%{__make} CFLAGS="$RPM_OPT_FLAGS %{cflags_profile_generate}=$profiledir" %{?_smp_mflags}
+time make check
+make clean
+%{__make} CFLAGS="$RPM_OPT_FLAGS %{cflags_profile_feedback}=$profiledir" %{?_smp_mflags}
+%else
+export CFLAGS="%optflags"
+./configure --shared
 %{__make} %{?_smp_mflags}
+%endif
 
 %check
-make test
+time make check
 
 %install
 mkdir -p %{buildroot}{/%{_lib},%{_libdir}}