Submitted By: Jim Gifford  <jim at cross-lfs dot org>
Originally Submitted By: Tushar Teredesai <tushar@linuxfromscratch.org>
Date: 2009-05-7
Initial Package Version: 1.2.2
Origin: Gentoo ebuild?
Upstream Status: Not submitted
Description:
 1. Build shared and static lib in one pass
 2. Always add -fPIC when building shared lib, don't expect the user to set it.

To build the shared and static library:
	./configure --prefix=<prefix> --shared &&
	make &&
	make install
Remove the --shared if you don't want the shared lib.

diff -Naur zlib-1.2.3.orig/configure zlib-1.2.3/configure
--- zlib-1.2.3.orig/configure	2005-07-11 13:11:57.000000000 -0700
+++ zlib-1.2.3/configure	2009-05-07 12:09:31.000000000 -0700
@@ -23,7 +23,7 @@
 VER=`sed -n -e '/VERSION "/s/.*"\(.*\)".*/\1/p' < zlib.h`
 VER2=`sed -n -e '/VERSION "/s/.*"\([0-9]*\\.[0-9]*\)\\..*/\1/p' < zlib.h`
 VER1=`sed -n -e '/VERSION "/s/.*"\([0-9]*\)\\..*/\1/p' < zlib.h`
-AR=${AR-"ar rc"}
+AR=${AR-"ar"}
 RANLIB=${RANLIB-"ranlib"}
 prefix=${prefix-/usr/local}
 exec_prefix=${exec_prefix-'${prefix}'}
@@ -73,7 +73,11 @@
 
 if test "$gcc" -eq 1 && ($cc -c $cflags $test.c) 2>/dev/null; then
   CC="$cc"
-  SFLAGS=${CFLAGS-"-fPIC -O3"}
+  #SFLAGS=${CFLAGS-"-fPIC -O3"}
+  # the above is horribly wrong on a few archs where -fPIC should ALWAYS be
+  # used in the creation of shared libraries. without the following, the
+  # shared lib test will sometimes fail even when shared libs -can- be created.
+  SFLAGS="${CFLAGS-"-O3"} -fPIC"
   CFLAGS="$cflags"
   case `(uname -s || echo unknown) 2>/dev/null` in
   Linux | linux | GNU | GNU/*) LDSHARED=${LDSHARED-"$cc -shared -Wl,-soname,libz.so.1"};;
@@ -174,7 +178,7 @@
   if test "`($CC -c $SFLAGS $test.c) 2>&1`" = "" &&
      test "`($LDSHARED -o $test$shared_ext $test.o) 2>&1`" = ""; then
     CFLAGS="$SFLAGS"
-    LIBS="$SHAREDLIBV"
+    LIBS="$LIBS $SHAREDLIBV"
     echo Building shared library $SHAREDLIBV with $CC.
   elif test -z "$old_cc" -a -z "$old_cflags"; then
     echo No shared library support.
diff -Naur zlib-1.2.3.orig/Makefile.in zlib-1.2.3/Makefile.in
--- zlib-1.2.3.orig/Makefile.in	2005-07-17 19:25:21.000000000 -0700
+++ zlib-1.2.3/Makefile.in	2009-05-07 12:10:15.000000000 -0700
@@ -49,6 +49,8 @@
 OBJS = adler32.o compress.o crc32.o gzio.o uncompr.o deflate.o trees.o \
        zutil.o inflate.o infback.o inftrees.o inffast.o
 
+PIC_OBJS = $(OBJS:%.o=%.lo)
+
 OBJA =
 # to use the asm code: make OBJA=match.o
 
@@ -68,7 +70,7 @@
 	fi
 
 libz.a: $(OBJS) $(OBJA)
-	$(AR) $@ $(OBJS) $(OBJA)
+	$(AR) rc $@ $(OBJS) $(OBJA)
 	-@ ($(RANLIB) $@ || true) >/dev/null 2>&1
 
 match.o: match.S
@@ -77,8 +79,11 @@
 	mv _match.o match.o
 	rm -f _match.s
 
-$(SHAREDLIBV): $(OBJS)
-	$(LDSHARED) -o $@ $(OBJS)
+%.lo: %.c
+	$(CC) $(CFLAGS) -DPIC -fPIC -c $< -o $@
+
+$(SHAREDLIBV): $(PIC_OBJS)
+	$(LDSHARED) -o $@ $(PIC_OBJS) -lc
 	rm -f $(SHAREDLIB) $(SHAREDLIBM)
 	ln -s $@ $(SHAREDLIB)
 	ln -s $@ $(SHAREDLIBM)
@@ -89,13 +94,10 @@
 minigzip$(EXE): minigzip.o $(LIBS)
 	$(CC) $(CFLAGS) -o $@ minigzip.o $(LDFLAGS)
 
-install: $(LIBS)
+install-libs: $(LIBS)
 	-@if [ ! -d $(exec_prefix) ]; then mkdir -p $(exec_prefix); fi
-	-@if [ ! -d $(includedir)  ]; then mkdir -p $(includedir); fi
 	-@if [ ! -d $(libdir)      ]; then mkdir -p $(libdir); fi
 	-@if [ ! -d $(man3dir)     ]; then mkdir -p $(man3dir); fi
-	cp zlib.h zconf.h $(includedir)
-	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
 	cp $(LIBS) $(libdir)
 	cd $(libdir); chmod 755 $(LIBS)
 	-@(cd $(libdir); $(RANLIB) libz.a || true) >/dev/null 2>&1
@@ -110,6 +112,11 @@
 # The ranlib in install is needed on NeXTSTEP which checks file times
 # ldconfig is for Linux
 
+install: install-libs
+	-@if [ ! -d $(includedir)  ]; then mkdir $(includedir); fi
+	cp zlib.h zconf.h $(includedir)
+	chmod 644 $(includedir)/zlib.h $(includedir)/zconf.h
+
 uninstall:
 	cd $(includedir); \
 	cd $(libdir); rm -f libz.a; \