Contribution from Diego "Flameeyes" Pettenò:
--------------------------------------------

The gmk file currnetly allow usage of -z defs as LDFLAGS only for
arches that are not PPC and are not 64-bit, without any comment on why
this happens; counting that PPC Linux does not seem to be supported by
OpenJDK anyway at the moment, -z defs works *mostly* fine on AMD64
Linux.

Where mostly is referred to demos that links using gcc even when the
source code is C++, using the LIBCXX variable to fix the link; this
works fine, unless you use STATIC_CXX=false at build time to use
runtime link to libstdc++.

The attached patch removes the conditionals and fixes the libstdc++
build, allowing a safer build with -z defs enabled even on amd64.

-- Diego "Flameeyes" Pettenò http://farragut.flameeyes.is-a-geek.org/



Index: openjdk/j2se/make/common/Defs-linux.gmk
===================================================================
--- openjdk.orig/j2se/make/common/Defs-linux.gmk
+++ openjdk/j2se/make/common/Defs-linux.gmk
@@ -208,12 +208,8 @@ endif
 
 EXTRA_LIBS += -lc
 
-ifneq ($(ARCH),ppc)
- ifneq ($(ARCH_DATA_MODEL),64)
- LDFLAGS_DEFS_OPTION = -z defs
- LDFLAGS_COMMON += $(LDFLAGS_DEFS_OPTION)
- endif
-endif
+LDFLAGS_DEFS_OPTION = -z defs
+LDFLAGS_COMMON += $(LDFLAGS_DEFS_OPTION)
 
 #
 # -L paths for finding and -ljava
@@ -288,7 +284,7 @@ override LEX_LIBRARY = -lfl
 ifeq ($(STATIC_CXX),true)
 override LIBCXX = -Wl,-Bstatic -lstdc++ -lgcc -Wl,-Bdynamic
 else
-override LIBCXX =
+override LIBCXX = -lstdc++
 endif
 override LIBPOSIX4 =
 override LIBSOCKET =