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8015252: Enable HotSpot build with Clang Reviewed-by: twisti, dholmes, kvn
author simonis
date Tue, 04 Jun 2013 22:16:15 -0700
parents cb75b67f04fb
children 91acb82a8b7a
comparison
equal deleted inserted replaced
10397:075ea888b039 10398:2cb5d5f6d5e5
69 endif 69 endif
70 CXX = $(CXX32) 70 CXX = $(CXX32)
71 CC = $(CC32) 71 CC = $(CC32)
72 endif 72 endif
73 73
74 ifeq ($(USE_CLANG), true)
75 CXX = clang++
76 CC = clang
77 endif
78
74 HOSTCXX = $(CXX) 79 HOSTCXX = $(CXX)
75 HOSTCC = $(CC) 80 HOSTCC = $(CC)
76 endif 81 endif
77 82
78 AS = $(CC) -c -x assembler-with-cpp 83 AS = $(CC) -c -x assembler-with-cpp
79 endif 84 endif
80 85
81 86
82 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only 87 ifeq ($(USE_CLANG), true)
83 # prints the numbers (e.g. "2.95", "3.2.1") 88 CC_VER_MAJOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f1)
84 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1) 89 CC_VER_MINOR := $(shell $(CC) -v 2>&1 | grep version | sed "s/.*version \([0-9]*\.[0-9]*\).*/\1/" | cut -d'.' -f2)
85 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2) 90 else
86 91 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only
87 # check for precompiled headers support 92 # prints the numbers (e.g. "2.95", "3.2.1")
88 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0" 93 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1)
89 # Allow the user to turn off precompiled headers from the command line. 94 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2)
90 ifneq ($(USE_PRECOMPILED_HEADER),0) 95 endif
91 PRECOMPILED_HEADER_DIR=. 96
92 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp 97 ifeq ($(USE_CLANG), true)
93 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch 98 # clang has precompiled headers support by default, but the user can switch
94 endif 99 # it off by using 'USE_PRECOMPILED_HEADER=0'.
95 endif 100 ifdef LP64
96 101 ifeq ($(USE_PRECOMPILED_HEADER),)
102 USE_PRECOMPILED_HEADER=1
103 endif
104 else
105 # We don't support precompiled headers on 32-bit builds because there some files are
106 # compiled with -fPIC while others are compiled without (see 'NONPIC_OBJ_FILES' rules.make)
107 # Clang produces an error if the PCH file was compiled with other options than the actual compilation unit.
108 USE_PRECOMPILED_HEADER=0
109 endif
110
111 ifeq ($(USE_PRECOMPILED_HEADER),1)
112
113 ifndef LP64
114 $(error " Precompiled Headers only supported on 64-bit platforms!")
115 endif
116
117 PRECOMPILED_HEADER_DIR=.
118 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
119 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.pch
120
121 PCH_FLAG = -include precompiled.hpp
122 PCH_FLAG/DEFAULT = $(PCH_FLAG)
123 PCH_FLAG/NO_PCH = -DNO_PCH
124 PCH_FLAG/BY_FILE = $(PCH_FLAG/$@)$(PCH_FLAG/DEFAULT$(PCH_FLAG/$@))
125
126 VM_PCH_FLAG/LIBJVM = $(PCH_FLAG/BY_FILE)
127 VM_PCH_FLAG/AOUT =
128 VM_PCH_FLAG = $(VM_PCH_FLAG/$(LINK_INTO))
129
130 # We only use precompiled headers for the JVM build
131 CFLAGS += $(VM_PCH_FLAG)
132
133 # There are some files which don't like precompiled headers
134 # The following files are build with 'OPT_CFLAGS/NOOPT' (-O0) in the opt build.
135 # But Clang doesn't support a precompiled header which was compiled with -O3
136 # to be used in a compilation unit which uses '-O0'. We could also prepare an
137 # extra '-O0' PCH file for the opt build and use it here, but it's probably
138 # not worth the effort as long as only two files need this special handling.
139 PCH_FLAG/loopTransform.o = $(PCH_FLAG/NO_PCH)
140 PCH_FLAG/sharedRuntimeTrig.o = $(PCH_FLAG/NO_PCH)
141 PCH_FLAG/sharedRuntimeTrans.o = $(PCH_FLAG/NO_PCH)
142
143 endif
144 else # ($(USE_CLANG), true)
145 # check for precompiled headers support
146 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0"
147 # Allow the user to turn off precompiled headers from the command line.
148 ifneq ($(USE_PRECOMPILED_HEADER),0)
149 PRECOMPILED_HEADER_DIR=.
150 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp
151 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch
152 endif
153 endif
154 endif
155
156 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
157 ifeq ($(USE_PRECOMPILED_HEADER),0)
158 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
159 endif
97 160
98 #------------------------------------------------------------------------ 161 #------------------------------------------------------------------------
99 # Compiler flags 162 # Compiler flags
100 163
101 # position-independent code 164 # position-independent code
113 CFLAGS += $(LLVM_CFLAGS) 176 CFLAGS += $(LLVM_CFLAGS)
114 endif 177 endif
115 CFLAGS += $(VM_PICFLAG) 178 CFLAGS += $(VM_PICFLAG)
116 CFLAGS += -fno-rtti 179 CFLAGS += -fno-rtti
117 CFLAGS += -fno-exceptions 180 CFLAGS += -fno-exceptions
118 CFLAGS += -pthread 181 ifeq ($(USE_CLANG),)
119 CFLAGS += -fcheck-new 182 CFLAGS += -pthread
120 # version 4 and above support fvisibility=hidden (matches jni_x86.h file) 183 CFLAGS += -fcheck-new
121 # except 4.1.2 gives pointless warnings that can't be disabled (afaik) 184 # version 4 and above support fvisibility=hidden (matches jni_x86.h file)
122 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 185 # except 4.1.2 gives pointless warnings that can't be disabled (afaik)
123 CFLAGS += -fvisibility=hidden 186 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
187 CFLAGS += -fvisibility=hidden
188 endif
189 else
190 CFLAGS += -fvisibility=hidden
191 endif
192
193 ifeq ($(USE_CLANG), true)
194 # Before Clang 3.1, we had to pass the stack alignment specification directly to llvm with the help of '-mllvm'
195 # Starting with version 3.1, Clang understands the '-mstack-alignment' (and rejects '-mllvm -stack-alignment')
196 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 1 \) \))" "0"
197 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mstack-alignment=16
198 else
199 STACK_ALIGNMENT_OPT = -mno-omit-leaf-frame-pointer -mllvm -stack-alignment=16
200 endif
124 endif 201 endif
125 202
126 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH)) 203 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH))
127 ARCHFLAG/i486 = -m32 -march=i586 204 ARCHFLAG/i486 = -m32 -march=i586
128 ARCHFLAG/amd64 = -m64 205 ARCHFLAG/amd64 = -m64 $(STACK_ALIGNMENT_OPT)
129 ARCHFLAG/ia64 = 206 ARCHFLAG/ia64 =
130 ARCHFLAG/sparc = -m32 -mcpu=v9 207 ARCHFLAG/sparc = -m32 -mcpu=v9
131 ARCHFLAG/sparcv9 = -m64 -mcpu=v9 208 ARCHFLAG/sparcv9 = -m64 -mcpu=v9
132 ARCHFLAG/zero = $(ZERO_ARCHFLAG) 209 ARCHFLAG/zero = $(ZERO_ARCHFLAG)
133 210
161 # Compiler warnings are treated as errors 238 # Compiler warnings are treated as errors
162 ifneq ($(COMPILER_WARNINGS_FATAL),false) 239 ifneq ($(COMPILER_WARNINGS_FATAL),false)
163 WARNINGS_ARE_ERRORS = -Werror 240 WARNINGS_ARE_ERRORS = -Werror
164 endif 241 endif
165 242
166 # Except for a few acceptable ones 243 ifeq ($(USE_CLANG), true)
167 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit 244 # However we need to clean the code up before we can unrestrictedly enable this option with Clang
168 # conversions which might affect the values. To avoid that, we need to turn 245 WARNINGS_ARE_ERRORS += -Wno-unused-value -Wno-logical-op-parentheses -Wno-parentheses-equality -Wno-parentheses
169 # it off explicitly. 246 WARNINGS_ARE_ERRORS += -Wno-switch -Wno-tautological-compare
170 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 247 # Not yet supported by clang in Xcode 4.6.2
248 # WARNINGS_ARE_ERRORS += -Wno-tautological-constant-out-of-range-compare
249 WARNINGS_ARE_ERRORS += -Wno-delete-non-virtual-dtor -Wno-deprecated -Wno-format -Wno-dynamic-class-memaccess
250 WARNINGS_ARE_ERRORS += -Wno-return-type -Wno-empty-body
251 endif
252
171 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef 253 WARNING_FLAGS = -Wpointer-arith -Wsign-compare -Wundef
172 else 254
173 WARNING_FLAGS = -Wpointer-arith -Wconversion -Wsign-compare -Wundef 255 ifeq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0"
256 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit
257 # conversions which might affect the values. Only enable it in earlier versions.
258 WARNING_FLAGS = -Wunused-function
259 ifeq ($(USE_CLANG),)
260 WARNINGS_FLAGS += -Wconversion
261 endif
174 endif 262 endif
175 263
176 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS) 264 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(WARNING_FLAGS)
177 # Special cases 265 # Special cases
178 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 266 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@))
212 OPT_CFLAGS += -fno-expensive-optimizations 300 OPT_CFLAGS += -fno-expensive-optimizations
213 endif 301 endif
214 302
215 OPT_CFLAGS/NOOPT=-O0 303 OPT_CFLAGS/NOOPT=-O0
216 304
217 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 305 # Work around some compiler bugs.
218 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0" 306 ifeq ($(USE_CLANG), true)
219 OPT_CFLAGS/mulnode.o += -O0 307 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 2), 1)
308 OPT_CFLAGS/loopTransform.o += $(OPT_CFLAGS/NOOPT)
309 endif
310 else
311 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation.
312 ifeq ($(shell expr $(CC_VER_MAJOR) = 4 \& $(CC_VER_MINOR) = 3), 1)
313 OPT_CFLAGS/mulnode.o += $(OPT_CFLAGS/NOOPT)
314 endif
220 endif 315 endif
221 316
222 # Flags for generating make dependency flags. 317 # Flags for generating make dependency flags.
223 ifneq ("${CC_VER_MAJOR}", "2") 318 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d)
224 DEPFLAGS = -fpch-deps -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d) 319 ifeq ($(USE_CLANG),)
320 ifneq ($(CC_VER_MAJOR), 2)
321 DEPFLAGS += -fpch-deps
322 endif
225 endif 323 endif
226 324
227 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp. 325 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp.
228 ifeq ($(USE_PRECOMPILED_HEADER),0) 326 ifeq ($(USE_PRECOMPILED_HEADER),0)
229 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER 327 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER
247 # Linker flags 345 # Linker flags
248 346
249 # statically link libstdc++.so, work with gcc but ignored by g++ 347 # statically link libstdc++.so, work with gcc but ignored by g++
250 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 348 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic
251 349
252 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x. 350 ifeq ($(USE_CLANG),)
253 ifneq ("${CC_VER_MAJOR}", "2") 351 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x.
254 STATIC_LIBGCC += -static-libgcc 352 ifneq ("${CC_VER_MAJOR}", "2")
255 endif 353 STATIC_LIBGCC += -static-libgcc
256 354 endif
257 ifeq ($(BUILDARCH), ia64) 355
258 LFLAGS += -Wl,-relax 356 ifeq ($(BUILDARCH), ia64)
357 LFLAGS += -Wl,-relax
358 endif
259 endif 359 endif
260 360
261 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 361 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file.
262 MAPFLAG = -Xlinker --version-script=FILENAME 362 MAPFLAG = -Xlinker --version-script=FILENAME
263 363
294 endif 394 endif
295 395
296 #------------------------------------------------------------------------ 396 #------------------------------------------------------------------------
297 # Debug flags 397 # Debug flags
298 398
299 # Use the stabs format for debugging information (this is the default 399 ifeq ($(USE_CLANG), true)
300 # on gcc-2.91). It's good enough, has all the information about line 400 # Restrict the debug information created by Clang to avoid
301 # numbers and local variables, and libjvm.so is only about 16M. 401 # too big object files and speed the build up a little bit
302 # Change this back to "-g" if you want the most expressive format. 402 # (see http://llvm.org/bugs/show_bug.cgi?id=7554)
303 # (warning: that could easily inflate libjvm.so to 150M!) 403 CFLAGS += -flimit-debug-info
304 # Note: The Itanium gcc compiler crashes when using -gstabs. 404 endif
305 DEBUG_CFLAGS/ia64 = -g 405
306 DEBUG_CFLAGS/amd64 = -g 406 # DEBUG_BINARIES uses full -g debug information for all configs
307 DEBUG_CFLAGS/arm = -g
308 DEBUG_CFLAGS/ppc = -g
309 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
310 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
311 DEBUG_CFLAGS += -gstabs
312 endif
313
314 # DEBUG_BINARIES overrides everything, use full -g debug information
315 ifeq ($(DEBUG_BINARIES), true) 407 ifeq ($(DEBUG_BINARIES), true)
316 DEBUG_CFLAGS = -g 408 CFLAGS += -g
317 CFLAGS += $(DEBUG_CFLAGS) 409 else
410 # Use the stabs format for debugging information (this is the default
411 # on gcc-2.91). It's good enough, has all the information about line
412 # numbers and local variables, and libjvm.so is only about 16M.
413 # Change this back to "-g" if you want the most expressive format.
414 # (warning: that could easily inflate libjvm.so to 150M!)
415 # Note: The Itanium gcc compiler crashes when using -gstabs.
416 DEBUG_CFLAGS/ia64 = -g
417 DEBUG_CFLAGS/amd64 = -g
418 DEBUG_CFLAGS/arm = -g
419 DEBUG_CFLAGS/ppc = -g
420 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH))
421 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),)
422 DEBUG_CFLAGS += -gstabs
423 endif
318 endif 424 endif
319 425
320 # If we are building HEADLESS, pass on to VM 426 # If we are building HEADLESS, pass on to VM
321 # so it can set the java.awt.headless property 427 # so it can set the java.awt.headless property
322 ifdef HEADLESS 428 ifdef HEADLESS