305 # This option is added to CFLAGS rather than OPT_CFLAGS
 306 # so that OPT_CFLAGS overrides get this option too.
 307 CFLAGS += -fno-strict-aliasing
 308 
 309 ifdef OPT_CFLAGS
 310   ifneq ("$(origin OPT_CFLAGS)", "command line")
 311     $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
 312   endif
 313 endif
 314 
 315 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
 316 
 317 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
 318 # if we use expensive-optimizations
 319 ifeq ($(BUILDARCH), ia64)
 320 OPT_CFLAGS += -fno-expensive-optimizations
 321 endif
 322 
 323 # Work around some compiler bugs.
 324 ifeq ($(USE_CLANG), true)
 325   # Clang < 6 | <= 6.1 | <= 7.0
 326   ifeq ($(shell expr \
 327       $(CC_VER_MAJOR) \< 6 \| \
 328       \( $(CC_VER_MAJOR) = 6 \& $(CC_VER_MINOR) \<= 1 \) \| \
 329       \( $(CC_VER_MAJOR) = 7 \& $(CC_VER_MINOR) \<= 0 \) \
 330     ), 1)
 331     OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
 332     OPT_CFLAGS/unsafe.o += -O1
 333 
 334     # The debug flag is added to OPT_CFLAGS, but lost in case of per-file overrides
 335     # of OPT_CFLAGS. Restore it here.
 336     ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
 337       OPT_CFLAGS/loopTransform.o += -g
 338       OPT_CFLAGS/unsafe.o += -g
 339     endif
 340   else
 341     $(error "Update compiler workarounds for Clang $(CC_VER_MAJOR).$(CC_VER_MINOR)")
 342   endif
 343 else
 344   # Do not allow GCC 4.1.1
 345   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 1 \& $(CC_VER_MICRO) = 1), 1)
 346     $(error "GCC $(CC_VER_MAJOR).$(CC_VER_MINOR).$(CC_VER_MICRO) not supported because of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27724")
 347   endif
 348   # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
 349   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)

 305 # This option is added to CFLAGS rather than OPT_CFLAGS
 306 # so that OPT_CFLAGS overrides get this option too.
 307 CFLAGS += -fno-strict-aliasing
 308 
 309 ifdef OPT_CFLAGS
 310   ifneq ("$(origin OPT_CFLAGS)", "command line")
 311     $(error " Use OPT_EXTRAS instead of OPT_CFLAGS to add extra flags to OPT_CFLAGS.")
 312   endif
 313 endif
 314 
 315 OPT_CFLAGS = $(OPT_CFLAGS/$(OPT_CFLAGS_DEFAULT)) $(OPT_EXTRAS)
 316 
 317 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp
 318 # if we use expensive-optimizations
 319 ifeq ($(BUILDARCH), ia64)
 320 OPT_CFLAGS += -fno-expensive-optimizations
 321 endif
 322 
 323 # Work around some compiler bugs.
 324 ifeq ($(USE_CLANG), true)
 325   # Clang < 6 | <= 6.1 | <= 7.3
 326   ifeq ($(shell expr \
 327       $(CC_VER_MAJOR) \< 6 \| \
 328       \( $(CC_VER_MAJOR) = 6 \& $(CC_VER_MINOR) \<= 1 \) \| \
 329       \( $(CC_VER_MAJOR) = 7 \& $(CC_VER_MINOR) \<= 3 \) \
 330     ), 1)
 331     OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
 332     OPT_CFLAGS/unsafe.o += -O1
 333 
 334     # The debug flag is added to OPT_CFLAGS, but lost in case of per-file overrides
 335     # of OPT_CFLAGS. Restore it here.
 336     ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
 337       OPT_CFLAGS/loopTransform.o += -g
 338       OPT_CFLAGS/unsafe.o += -g
 339     endif
 340   else
 341     $(error "Update compiler workarounds for Clang $(CC_VER_MAJOR).$(CC_VER_MINOR)")
 342   endif
 343 else
 344   # Do not allow GCC 4.1.1
 345   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 1 \& $(CC_VER_MICRO) = 1), 1)
 346     $(error "GCC $(CC_VER_MAJOR).$(CC_VER_MINOR).$(CC_VER_MICRO) not supported because of https://gcc.gnu.org/bugzilla/show_bug.cgi?id=27724")
 347   endif
 348   # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
 349   ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)