1 # 2 # Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 # 5 # This code is free software; you can redistribute it and/or modify it 6 # under the terms of the GNU General Public License version 2 only, as 7 # published by the Free Software Foundation. 8 # 9 # This code is distributed in the hope that it will be useful, but WITHOUT 10 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 # version 2 for more details (a copy is included in the LICENSE file that 13 # accompanied this code). 14 # 15 # You should have received a copy of the GNU General Public License version 16 # 2 along with this work; if not, write to the Free Software Foundation, 17 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 # 19 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 # or visit www.oracle.com if you need additional information or have any 21 # questions. 22 # 23 # 24 25 #------------------------------------------------------------------------ 26 # CC, CXX & AS 27 28 # If a SPEC is not set already, then use these defaults. 29 ifeq ($(SPEC),) 30 # When cross-compiling the ALT_COMPILER_PATH points 31 # to the cross-compilation toolset 32 ifdef CROSS_COMPILE_ARCH 33 CXX = $(ALT_COMPILER_PATH)/g++ 34 CC = $(ALT_COMPILER_PATH)/gcc 35 HOSTCXX = g++ 36 HOSTCC = gcc 37 else 38 CXX = g++ 39 CC = gcc 40 HOSTCXX = $(CXX) 41 HOSTCC = $(CC) 42 endif 43 44 AS = $(CC) -c 45 46 ifdef CROSS_COMPILE_ARCH 47 STRIP = $(ALT_COMPILER_PATH)/strip 48 else 49 STRIP = strip 50 endif 51 endif 52 53 54 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only 55 # prints the numbers (e.g. "2.95", "3.2.1") 56 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1) 57 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2) 58 59 # check for precompiled headers support 60 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0" 61 # Allow the user to turn off precompiled headers from the command line. 62 ifneq ($(USE_PRECOMPILED_HEADER),0) 63 PRECOMPILED_HEADER_DIR=. 64 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp 65 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch 66 endif 67 endif 68 69 70 #------------------------------------------------------------------------ 71 # Compiler flags 72 73 # position-independent code 74 PICFLAG = -fPIC 75 76 VM_PICFLAG/LIBJVM = $(PICFLAG) 77 VM_PICFLAG/AOUT = 78 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO)) 79 80 ifeq ($(ZERO_BUILD), true) 81 CFLAGS += $(LIBFFI_CFLAGS) 82 endif 83 ifeq ($(SHARK_BUILD), true) 84 CFLAGS += $(LLVM_CFLAGS) 85 endif 86 CFLAGS += $(VM_PICFLAG) 87 CFLAGS += -fno-rtti 88 CFLAGS += -fno-exceptions 89 CFLAGS += -D_REENTRANT 90 CFLAGS += -fcheck-new 91 # version 4 and above support fvisibility=hidden (matches jni_x86.h file) 92 # except 4.1.2 gives pointless warnings that can't be disabled (afaik) 93 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 94 CFLAGS += -fvisibility=hidden 95 endif 96 97 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH)) 98 ARCHFLAG/i486 = -m32 -march=i586 99 ARCHFLAG/amd64 = -m64 100 ARCHFLAG/ia64 = 101 ARCHFLAG/sparc = -m32 -mcpu=v9 102 ARCHFLAG/sparcv9 = -m64 -mcpu=v9 103 ARCHFLAG/arm = -fsigned-char 104 ARCHFLAG/zero = $(ZERO_ARCHFLAG) 105 ifndef E500V2 106 ARCHFLAG/ppc = -mcpu=powerpc 107 endif 108 109 CFLAGS += $(ARCHFLAG) 110 AOUT_FLAGS += $(ARCHFLAG) 111 LFLAGS += $(ARCHFLAG) 112 ASFLAGS += $(ARCHFLAG) 113 114 ifdef E500V2 115 CFLAGS += -DE500V2 116 endif 117 118 # Use C++ Interpreter 119 ifdef CC_INTERP 120 CFLAGS += -DCC_INTERP 121 endif 122 123 # Build for embedded targets 124 ifdef JAVASE_EMBEDDED 125 CFLAGS += -DJAVASE_EMBEDDED 126 endif 127 128 # Keep temporary files (.ii, .s) 129 ifdef NEED_ASM 130 CFLAGS += -save-temps 131 else 132 CFLAGS += -pipe 133 endif 134 135 # Compiler warnings are treated as errors 136 WARNINGS_ARE_ERRORS = -Werror 137 138 # Except for a few acceptable ones 139 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit 140 # conversions which might affect the values. To avoid that, we need to turn 141 # it off explicitly. 142 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 143 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare 144 else 145 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare 146 endif 147 148 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS) 149 # Special cases 150 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 151 152 # The flags to use for an Optimized g++ build 153 OPT_CFLAGS += -O3 154 155 # Hotspot uses very unstrict aliasing turn this optimization off 156 OPT_CFLAGS += -fno-strict-aliasing 157 158 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 159 # if we use expensive-optimizations 160 ifeq ($(BUILDARCH), ia64) 161 OPT_CFLAGS += -fno-expensive-optimizations 162 endif 163 164 OPT_CFLAGS/NOOPT=-O0 165 166 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 167 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0" 168 OPT_CFLAGS/mulnode.o += -O0 169 endif 170 171 # Flags for generating make dependency flags. 172 ifneq ("${CC_VER_MAJOR}", "2") 173 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d) 174 endif 175 176 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp. 177 ifeq ($(USE_PRECOMPILED_HEADER),0) 178 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER 179 endif 180 181 #------------------------------------------------------------------------ 182 # Linker flags 183 184 # statically link libstdc++.so, work with gcc but ignored by g++ 185 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 186 187 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x. 188 ifneq ("${CC_VER_MAJOR}", "2") 189 STATIC_LIBGCC += -static-libgcc 190 endif 191 192 ifeq ($(BUILDARCH), ia64) 193 LFLAGS += -Wl,-relax 194 endif 195 196 # Enable linker optimization 197 LFLAGS += -Xlinker -O1 198 199 # If this is a --hash-style=gnu system, use --hash-style=both 200 # The gnu .hash section won't work on some Linux systems like SuSE 10. 201 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu') 202 ifneq ($(_HAS_HASH_STYLE_GNU),) 203 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 204 endif 205 LFLAGS += $(LDFLAGS_HASH_STYLE) 206 207 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 208 MAPFLAG = -Xlinker --version-script=FILENAME 209 210 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj 211 SONAMEFLAG = -Xlinker -soname=SONAME 212 213 # Build shared library 214 SHARED_FLAG = -shared 215 216 # Keep symbols even they are not used 217 AOUT_FLAGS += -Xlinker -export-dynamic 218 219 #------------------------------------------------------------------------ 220 # Debug flags 221 222 # Use the stabs format for debugging information (this is the default 223 # on gcc-2.91). It's good enough, has all the information about line 224 # numbers and local variables, and libjvm_g.so is only about 16M. 225 # Change this back to "-g" if you want the most expressive format. 226 # (warning: that could easily inflate libjvm_g.so to 150M!) 227 # Note: The Itanium gcc compiler crashes when using -gstabs. 228 DEBUG_CFLAGS/ia64 = -g 229 DEBUG_CFLAGS/amd64 = -g 230 DEBUG_CFLAGS/arm = -g 231 DEBUG_CFLAGS/ppc = -g 232 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 233 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),) 234 DEBUG_CFLAGS += -gstabs 235 endif 236 237 ifneq ($(OBJCOPY),) 238 FASTDEBUG_CFLAGS/ia64 = -g 239 FASTDEBUG_CFLAGS/amd64 = -g 240 FASTDEBUG_CFLAGS/arm = -g 241 FASTDEBUG_CFLAGS/ppc = -g 242 FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 243 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),) 244 FASTDEBUG_CFLAGS += -gstabs 245 endif 246 247 OPT_CFLAGS/ia64 = -g 248 OPT_CFLAGS/amd64 = -g 249 OPT_CFLAGS/arm = -g 250 OPT_CFLAGS/ppc = -g 251 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH)) 252 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),) 253 OPT_CFLAGS += -gstabs 254 endif 255 endif 256 257 # DEBUG_BINARIES overrides everything, use full -g debug information 258 ifeq ($(DEBUG_BINARIES), true) 259 DEBUG_CFLAGS = -g 260 CFLAGS += $(DEBUG_CFLAGS) 261 endif 262 263 # If we are building HEADLESS, pass on to VM 264 # so it can set the java.awt.headless property 265 ifdef HEADLESS 266 CFLAGS += -DHEADLESS 267 endif 268 269 # We are building Embedded for a small device 270 # favor code space over speed 271 ifdef MINIMIZE_RAM_USAGE 272 CFLAGS += -DMINIMIZE_RAM_USAGE 273 endif