Rework the build system a bit

[ghc-hetmet.git] / mk / package.mk

diff --git a/mk/package.mk b/mk/package.mk
index 27a0966..6c22535 100644 (file)
--- a/mk/package.mk
+++ b/mk/package.mk
@@ -22,13 +22,8 @@ PKG_DATADIR = $$topdir
 
 else
 
-ifeq "$(BIN_DIST)" ""
-PKG_LIBDIR  = $(libdir)
-PKG_DATADIR = $(datadir)
-else
 PKG_LIBDIR  = $$libdir
 PKG_DATADIR = $$datadir
-endif
 
 endif # Unix
 
@@ -273,21 +268,35 @@ DYLD_LIBRARY = $(patsubst %.a,%_dyn.dylib,$(LIBRARY))
     # About the options used for Darwin:
     # -dynamiclib
     #   Apple's way of saying -shared
-    # -flat_namespace -undefined suppress:
+    # -undefined dynamic_lookup:
     #   Without these options, we'd have to specify the correct dependencies
-    #   for each of the dylibs. Twolevel namespaces are in general a good thing
-    #   (they make things more robust), so we should fix this sooner or later.
+    #   for each of the dylibs. Note that we could (and should) do without this
+    #  for all libraries except the RTS; all we need to do is to pass the
+    #  correct HSfoo_dyn.dylib files to the link command.
+    #  This feature requires Mac OS X 10.3 or later; there is a similar feature,
+    #  -flat_namespace -undefined suppress, which works on earlier versions,
+    #  but it has other disadvantages.
+    # -single_module
+    #  Build the dynamic library as a single "module", i.e. no dynamic binding
+    #  nonsense when referring to symbols from within the library. The NCG
+    #  assumes that this option is specified (on i386, at least).
+    # -Wl,-macosx_version_min -Wl,10.3
+    #  Tell the linker its safe to assume that the library will run on 10.3 or
+    #  later, so that it will not complain about the use of the option
+    #  -undefined dynamic_lookup above.
     # -install_name
     #   Causes the dynamic linker to ignore the DYLD_LIBRARY_PATH when loading
     #   this lib and instead look for it at its absolute path.
     #   When installing the .dylibs (see target.mk), we'll change that path to
-    #   point to the place they are installed.
-    #   Note: I'm not yet sure about this, but I think it will be convenient for
-    #         users not to have to set up DYLD_LIBRARY_PATH to point to the GHC
-    #         library dir. -- Wolfgang
+    #   point to the place they are installed. Therefore, we won't have to set
+    #  up DYLD_LIBRARY_PATH specifically for ghc.
 
 $(DYLD_LIBRARY) : $(LIBOBJS) $(STUBOBJS)
-       $(CC) -dynamiclib -o $@ $(STUBOBJS) $(LIBOBJS) -flat_namespace -undefined suppress -install_name `pwd`/$@
+       $(CC) -dynamiclib -o $@ $(STUBOBJS) $(LIBOBJS) \
+               -undefined dynamic_lookup -single_module \
+                -Wl,-macosx_version_min -Wl,10.3 \
+               -install_name `pwd`/$@
+
 else
 DYLD_LIBRARY = $(patsubst %.a,%_dyn.so,$(LIBRARY))
 
@@ -359,7 +368,6 @@ CLEAN_FILES += $(PACKAGE).haddock
        $(HC) $(HC_OPTS) -D__HADDOCK__ -E $< -o $@
 
 HTML_INSTALL_DIR = $(datadir)/html/libraries/$(PACKAGE)
-#  NOT the same as HTML_DIR_INSTALLED when BIN_DIST is on
 
 install-docs :: $(HTML_DOC)
        @$(INSTALL_DIR) $(HTML_INSTALL_DIR)