java-1.8.0-openjdk/fix-zero-build-on-arm.patch

# HG changeset patch
# User omajid
# Date 1367253270 14400
# Node ID 1dfcc874461e8348a1066c360d1c33db72cebf55
# Parent b9415faa7066a4d3b16d466556d5428446918d95
8013480: fix zero build on arm
Reviewed-by: erikj

--- jdk8/common/autoconf/platform.m4	Tue Apr 23 09:26:43 2013 -0700
+++ jdk8/common/autoconf/platform.m4	Mon Apr 29 12:34:30 2013 -0400
@@ -342,6 +342,7 @@ AC_DEFUN([PLATFORM_SETUP_LEGACY_VARS],
       *)
         ZERO_ARCHFLAG="-m${OPENJDK_TARGET_CPU_BITS}"
     esac
+    PLATFORM_COMPILER_CHECK_ARGUMENTS([$ZERO_ARCHFLAG], [], [ZERO_ARCHFLAG=""])
     AC_SUBST(ZERO_ARCHFLAG)
 
     # ZERO_ARCHDEF is used to enable architecture-specific code
@@ -417,6 +418,51 @@ AC_SUBST(OS_VERSION_MICRO)
 AC_SUBST(OS_VERSION_MICRO)
 ])
 
+# PLATFORM_COMPILER_CHECK_ARGUMENTS([ARGUMENT], [RUN-IF-TRUE],
+#                                   [RUN-IF-FALSE])
+# ------------------------------------------------------------
+# Check that the c and c++ compilers support an argument
+AC_DEFUN([PLATFORM_COMPILER_CHECK_ARGUMENTS],
+[
+  AC_MSG_CHECKING([if compiler supports "$1"])
+  supports=yes
+
+  saved_cflags="$CFLAGS"
+  CFLAGS="$CFLAGS $1"
+  AC_LANG_PUSH([C])
+  AC_COMPILE_IFELSE([
+    AC_LANG_SOURCE([[int i;]])
+  ], [], [supports=no])
+  AC_LANG_POP([C])
+  CFLAGS="$saved_cflags"
+
+  saved_cxxflags="$CXXFLAGS"
+  CXXFLAGS="$CXXFLAG $1"
+  AC_LANG_PUSH([C++])
+  AC_COMPILE_IFELSE([
+    AC_LANG_SOURCE([[int i;]])
+  ], [], [supports=no])
+  AC_LANG_POP([C++])
+  CXXFLAGS="$saved_cxxflags"
+
+  AC_MSG_RESULT([$supports])
+  if test "x$supports" = "xyes" ; then
+    m4_ifval([$2], [$2], [:])
+  else
+    m4_ifval([$3], [$3], [:])
+  fi
+])
+
+# Check that the compiler supports -mX flags
+# Set COMPILER_SUPPORTS_TARGET_BITS_FLAG to 'true' if it does
+AC_DEFUN([PLATFORM_CHECK_COMPILER_TARGET_BITS_FLAGS],
+[
+  PLATFORM_COMPILER_CHECK_ARGUMENTS([-m${OPENJDK_TARGET_CPU_BITS}],
+    [COMPILER_SUPPORTS_TARGET_BITS_FLAG=true],
+    [COMPILER_SUPPORTS_TARGET_BITS_FLAG=false])
+  AC_SUBST(COMPILER_SUPPORTS_TARGET_BITS_FLAG)
+])
+
 # Support macro for PLATFORM_SETUP_OPENJDK_TARGET_BITS.
 # Add -mX to various FLAGS variables.
 AC_DEFUN([PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS],
@@ -444,6 +490,9 @@ AC_DEFUN_ONCE([PLATFORM_SETUP_OPENJDK_TA
 # (The JVM can use 32 or 64 bit Java pointers but that decision
 # is made at runtime.)
 #
+
+PLATFORM_CHECK_COMPILER_TARGET_BITS_FLAGS
+
 if test "x$OPENJDK_TARGET_OS" = xsolaris; then
   # Always specify -m flags on Solaris
   PLATFORM_SET_COMPILER_TARGET_BITS_FLAGS
--- jdk8/common/autoconf/spec.gmk.in	Tue Apr 23 09:26:43 2013 -0700
+++ jdk8/common/autoconf/spec.gmk.in	Mon Apr 29 12:34:30 2013 -0400
@@ -300,6 +300,8 @@ MACOSX_VERSION_MIN=@MACOSX_VERSION_MIN@
 # CC is gcc and others behaving reasonably similar.
 # CL is cl.exe only.
 COMPILER_TYPE:=@COMPILER_TYPE@
+
+COMPILER_SUPPORTS_TARGET_BITS_FLAG=@COMPILER_SUPPORTS_TARGET_BITS_FLAG@
 
 CC_OUT_OPTION:=@CC_OUT_OPTION@
 EXE_OUT_OPTION:=@EXE_OUT_OPTION@


--- jdk8/jdk/makefiles/GensrcX11Wrappers.gmk	Tue Apr 23 18:25:52 2013 -0700
+++ jdk8/jdk/makefiles/GensrcX11Wrappers.gmk	Mon Apr 29 12:34:53 2013 -0400
@@ -86,10 +86,15 @@ ifneq ($(COMPILE_TYPE),cross)
 	$(MKDIR) -p $(@D)
 	$(TOOL_WRAPPERGENERATOR) $(@D) $(GENSRC_SIZER_DIR)/xlibtypes.txt "sizer" $*
 
+    # use -m32/-m64 only if the compiler supports it
+    ifeq ($(COMPILER_SUPPORTS_TARGET_BITS_FLAG),true)
+    MEMORY_MODEL_FLAG="-m$*"
+    endif
+
     # Compile the C code into an executable.
     $(GENSRC_X11WRAPPERS_TMP)/sizer.%.exe : $(GENSRC_X11WRAPPERS_TMP)/sizer.%.c
 	$(MKDIR) -p $(@D)
-	(cd $(@D) && $(CC) -m$* -o $@ $< \
+	(cd $(@D) && $(CC) $(MEMORY_MODEL_FLAG) -o $@ $< \
               $(X_CFLAGS) \
               $(X_LIBS) \
               -I$(JDK_OUTPUTDIR)/include \