Fix cross/zlib (#5496)

* cross/zlib: fix pkgconfig file
- fix generated zlib.pc (wrong prefix caused problems in dependent libraries and binaries)

* openjpeg: fix build with fixed zlib.pc

cross/openjpeg/Makefile

@@ -15,5 +15,7 @@ LICENSE  = BSD 2-clause simplified
 CMAKE_USE_NINJA = 1
 CMAKE_ARGS += -DBUILD_STATIC_LIBS=OFF
 CMAKE_ARGS += -DOPENJP2_COMPILE_OPTIONS="-O"
+# deactivate build of tools (we use the library only)
+CMAKE_ARGS += -DBUILD_CODEC=OFF
 
 include ../../mk/spksrc.cross-cmake.mk

cross/zlib/Makefile

@@ -13,4 +13,9 @@ LICENSE  = zlib-license
 
 ADDITIONAL_CFLAGS = -Os -fPIC
 
-include ../../mk/spksrc.cross-cc.mk
+# fix pkgconfig file
+# build with cross-cc creates wrong pkgconfig file (prefix without missing package name)
+# build with cross-cmake creates correct pkgconfig file, but default folder is share not lib
+CMAKE_ARGS += -DINSTALL_PKGCONFIG_DIR=$(INSTALL_PREFIX)/lib/pkgconfig
+
+include ../../mk/spksrc.cross-cmake.mk