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diff --git openjdk.orig/jdk/make/lib/CoreLibraries.gmk openjdk/jdk/make/lib/CoreLibraries.gmk
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--- openjdk.orig/jdk/make/lib/CoreLibraries.gmk
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+++ openjdk/jdk/make/lib/CoreLibraries.gmk
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@@ -37,21 +37,32 @@ ifeq ($(OPENJDK_TARGET_OS), solaris)
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endif
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ifeq ($(OPENJDK_TARGET_OS), linux)
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- ifeq ($(OPENJDK_TARGET_CPU), ppc64)
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- BUILD_LIBFDLIBM_OPTIMIZATION := HIGH
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- else ifeq ($(OPENJDK_TARGET_CPU), ppc64le)
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- BUILD_LIBFDLIBM_OPTIMIZATION := HIGH
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- else ifeq ($(OPENJDK_TARGET_CPU), aarch64)
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- BUILD_LIBFDLIBM_OPTIMIZATION := HIGH
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- endif
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-endif
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-
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-ifneq ($(OPENJDK_TARGET_OS), macosx)
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+ BUILD_LIBFDLIBM_OPTIMIZATION := HIGH
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+ LIBFDLIBM_CFLAGS_LINUX := -ffp-contract=off
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# Unfortunately, '-ffp-contract' is only available since gcc 4.6. For ppc64le
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# that's no problem since ppc64le support only appeared in gcc 4.8.3. But on
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# ppc64 (big endian) we traditionally compiled with gcc 4.3 which only knows
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# '-mno-fused-madd'. However, that's still not enough to get the float
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# computations right - we additionally have to supply '-fno-strict-aliasing'.
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+ #
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+ #
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+ ifeq ($(TOOLCHAIN_TYPE), gcc)
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+ CC_VER_MAJOR := $(shell $(CC) -dumpversion | cut -d'.' -f1)
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+ CC_VER_MINOR := $(shell $(CC) -dumpversion | cut -d'.' -f2)
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+ endif
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+ # Only GCC 4.6 and better have machine independent -ffp-contract=off.
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+ # For other versions we need to explicitly set arch specific machine
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+ # flags or keep optimization off.
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+ ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 6 \) \))" "0"
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+ ifeq ($(OPENJDK_TARGET_CPU), ppc64)
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+ LIBFDLIBM_CFLAGS_LINUX := -mno-fused-madd -fno-strict-aliasing
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+ else
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+ BUILD_LIBFDLIBM_OPTIMIZATION := NONE
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+ endif
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+ endif
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+endif
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+
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+ifneq ($(OPENJDK_TARGET_OS), macosx)
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$(eval $(call SetupNativeCompilation,BUILD_LIBFDLIBM, \
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STATIC_LIBRARY := fdlibm, \
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OUTPUT_DIR := $(JDK_OUTPUTDIR)/objs, \
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@@ -62,9 +73,7 @@ ifneq ($(OPENJDK_TARGET_OS), macosx)
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-I$(JDK_TOPDIR)/src/share/native/java/lang/fdlibm/include, \
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CFLAGS_windows_debug := -DLOGGING, \
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CFLAGS_aix := -qfloat=nomaf, \
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- CFLAGS_linux_ppc64 := -mno-fused-madd -fno-strict-aliasing, \
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- CFLAGS_linux_ppc64le := -ffp-contract=off, \
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- CFLAGS_linux_aarch64 := -ffp-contract=off, \
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+ CFLAGS_linux := $(LIBFDLIBM_CFLAGS_LINUX), \
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ARFLAGS := $(ARFLAGS), \
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OBJECT_DIR := $(JDK_OUTPUTDIR)/objs/libfdlibm, \
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DEBUG_SYMBOLS := $(DEBUG_ALL_BINARIES)))
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