zlib: enable PIC on Solaris

Signed-off-by: Rafaël Carré <funman@videolan.org>
(cherry picked from commit 8f70026dbf9a1f673da6a5ddff8b6d2fdbc2d4f7)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/zlib/rules.mak

@@ -13,6 +13,10 @@ ZLIB_CONFIG_VARS=CHOST=$(HOST)
 endif
 endif
 
+ifdef HAVE_SOLARIS
+ZLIB_ECFLAGS = -fPIC -DPIC
+endif
+
 $(TARBALLS)/zlib-$(ZLIB_VERSION).tar.gz:
 	$(call download,$(ZLIB_URL))
 
@@ -23,6 +27,6 @@ zlib: zlib-$(ZLIB_VERSION).tar.gz .sum-zlib
 	$(MOVE)
 
 .zlib: zlib
-	cd $< && $(HOSTVARS) $(ZLIB_CONFIG_VARS) ./configure --prefix=$(PREFIX) --static
+	cd $< && $(HOSTVARS) $(ZLIB_CONFIG_VARS) CFLAGS="$(CFLAGS) $(ZLIB_ECFLAGS)" ./configure --prefix=$(PREFIX) --static
 	cd $< && $(MAKE) install
 	touch $@