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 # When cross-compiling the ALT_COMPILER_PATH points 29 # to the cross-compilation toolset 30 ifdef CROSS_COMPILE_ARCH 31 CXX = $(ALT_COMPILER_PATH)/g++ 32 CC = $(ALT_COMPILER_PATH)/gcc 33 HOSTCXX = g++ 34 HOSTCC = gcc 35 else 36 CXX = g++ 37 CC = gcc 38 HOSTCXX = $(CXX) 39 HOSTCC = $(CC) 40 endif 41 42 AS = $(CC) -c 43 44 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only 45 # prints the numbers (e.g. "2.95", "3.2.1") 46 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1) 47 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2) 48 49 # check for precompiled headers support 50 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0" 51 # Allow the user to turn off precompiled headers from the command line. 52 ifneq ($(USE_PRECOMPILED_HEADER),0) 53 PRECOMPILED_HEADER_DIR=. 54 PRECOMPILED_HEADER_SRC=$(GAMMADIR)/src/share/vm/precompiled/precompiled.hpp 55 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/precompiled.hpp.gch 56 endif 57 endif 58 59 60 #------------------------------------------------------------------------ 61 # Compiler flags 62 63 # position-independent code 64 PICFLAG = -fPIC 65 66 VM_PICFLAG/LIBJVM = $(PICFLAG) 67 VM_PICFLAG/AOUT = 68 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO)) 69 70 ifeq ($(ZERO_BUILD), true) 71 CFLAGS += $(LIBFFI_CFLAGS) 72 endif 73 ifeq ($(SHARK_BUILD), true) 74 CFLAGS += $(LLVM_CFLAGS) 75 endif 76 CFLAGS += $(VM_PICFLAG) 77 CFLAGS += -fno-rtti 78 CFLAGS += -fno-exceptions 79 CFLAGS += -D_REENTRANT 80 CFLAGS += -fcheck-new 81 # version 4 and above support fvisibility=hidden (matches jni_x86.h file) 82 # except 4.1.2 gives pointless warnings that can't be disabled (afaik) 83 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 84 CFLAGS += -fvisibility=hidden 85 endif 86 87 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH)) 88 ARCHFLAG/i486 = -m32 -march=i586 89 ARCHFLAG/amd64 = -m64 90 ARCHFLAG/ia64 = 91 ARCHFLAG/sparc = -m32 -mcpu=v9 92 ARCHFLAG/sparcv9 = -m64 -mcpu=v9 93 ARCHFLAG/arm = -fsigned-char 94 ARCHFLAG/zero = $(ZERO_ARCHFLAG) 95 ifndef E500V2 96 ARCHFLAG/ppc = -mcpu=powerpc 97 endif 98 99 CFLAGS += $(ARCHFLAG) 100 AOUT_FLAGS += $(ARCHFLAG) 101 LFLAGS += $(ARCHFLAG) 102 ASFLAGS += $(ARCHFLAG) 103 104 ifdef E500V2 105 CFLAGS += -DE500V2 106 endif 107 108 # Use C++ Interpreter 109 ifdef CC_INTERP 110 CFLAGS += -DCC_INTERP 111 endif 112 113 # Build for embedded targets 114 ifdef JAVASE_EMBEDDED 115 CFLAGS += -DJAVASE_EMBEDDED 116 endif 117 118 # Keep temporary files (.ii, .s) 119 ifdef NEED_ASM 120 CFLAGS += -save-temps 121 else 122 CFLAGS += -pipe 123 endif 124 125 # Compiler warnings are treated as errors 126 WARNINGS_ARE_ERRORS = -Werror 127 128 # Except for a few acceptable ones 129 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit 130 # conversions which might affect the values. To avoid that, we need to turn 131 # it off explicitly. 132 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 133 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare 134 else 135 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare 136 endif 137 138 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS) 139 # Special cases 140 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 141 142 # The flags to use for an Optimized g++ build 143 OPT_CFLAGS += -O3 144 145 # Hotspot uses very unstrict aliasing turn this optimization off 146 OPT_CFLAGS += -fno-strict-aliasing 147 148 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 149 # if we use expensive-optimizations 150 ifeq ($(BUILDARCH), ia64) 151 OPT_CFLAGS += -fno-expensive-optimizations 152 endif 153 154 OPT_CFLAGS/NOOPT=-O0 155 156 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 157 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0" 158 OPT_CFLAGS/mulnode.o += -O0 159 endif 160 161 # Flags for generating make dependency flags. 162 ifneq ("${CC_VER_MAJOR}", "2") 163 DEPFLAGS = -MMD -MP -MF $(DEP_DIR)/$(@:%=%.d) 164 endif 165 166 # -DDONT_USE_PRECOMPILED_HEADER will exclude all includes in precompiled.hpp. 167 ifeq ($(USE_PRECOMPILED_HEADER),0) 168 CFLAGS += -DDONT_USE_PRECOMPILED_HEADER 169 endif 170 171 #------------------------------------------------------------------------ 172 # Linker flags 173 174 # statically link libstdc++.so, work with gcc but ignored by g++ 175 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 176 177 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x. 178 ifneq ("${CC_VER_MAJOR}", "2") 179 STATIC_LIBGCC += -static-libgcc 180 endif 181 182 ifeq ($(BUILDARCH), ia64) 183 LFLAGS += -Wl,-relax 184 endif 185 186 # Enable linker optimization 187 LFLAGS += -Xlinker -O1 188 189 # If this is a --hash-style=gnu system, use --hash-style=both 190 # The gnu .hash section won't work on some Linux systems like SuSE 10. 191 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu') 192 ifneq ($(_HAS_HASH_STYLE_GNU),) 193 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 194 endif 195 LFLAGS += $(LDFLAGS_HASH_STYLE) 196 197 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 198 MAPFLAG = -Xlinker --version-script=FILENAME 199 200 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj 201 SONAMEFLAG = -Xlinker -soname=SONAME 202 203 # Build shared library 204 SHARED_FLAG = -shared 205 206 # Keep symbols even they are not used 207 AOUT_FLAGS += -Xlinker -export-dynamic 208 209 #------------------------------------------------------------------------ 210 # Debug flags 211 212 # Use the stabs format for debugging information (this is the default 213 # on gcc-2.91). It's good enough, has all the information about line 214 # numbers and local variables, and libjvm_g.so is only about 16M. 215 # Change this back to "-g" if you want the most expressive format. 216 # (warning: that could easily inflate libjvm_g.so to 150M!) 217 # Note: The Itanium gcc compiler crashes when using -gstabs. 218 DEBUG_CFLAGS/ia64 = -g 219 DEBUG_CFLAGS/amd64 = -g 220 DEBUG_CFLAGS/arm = -g 221 DEBUG_CFLAGS/ppc = -g 222 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 223 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),) 224 DEBUG_CFLAGS += -gstabs 225 endif 226 227 ifneq ($(OBJCOPY),) 228 FASTDEBUG_CFLAGS/ia64 = -g 229 FASTDEBUG_CFLAGS/amd64 = -g 230 FASTDEBUG_CFLAGS/arm = -g 231 FASTDEBUG_CFLAGS/ppc = -g 232 FASTDEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 233 ifeq ($(FASTDEBUG_CFLAGS/$(BUILDARCH)),) 234 FASTDEBUG_CFLAGS += -gstabs 235 endif 236 237 OPT_CFLAGS/ia64 = -g 238 OPT_CFLAGS/amd64 = -g 239 OPT_CFLAGS/arm = -g 240 OPT_CFLAGS/ppc = -g 241 OPT_CFLAGS += $(OPT_CFLAGS/$(BUILDARCH)) 242 ifeq ($(OPT_CFLAGS/$(BUILDARCH)),) 243 OPT_CFLAGS += -gstabs 244 endif 245 endif 246 247 # DEBUG_BINARIES overrides everything, use full -g debug information 248 ifeq ($(DEBUG_BINARIES), true) 249 DEBUG_CFLAGS = -g 250 CFLAGS += $(DEBUG_CFLAGS) 251 endif 252 253 # If we are building HEADLESS, pass on to VM 254 # so it can set the java.awt.headless property 255 ifdef HEADLESS 256 CFLAGS += -DHEADLESS 257 endif 258 259 # We are building Embedded for a small device 260 # favor code space over speed 261 ifdef MINIMIZE_RAM_USAGE 262 CFLAGS += -DMINIMIZE_RAM_USAGE 263 endif 264 265 ifdef CROSS_COMPILE_ARCH 266 STRIP = $(ALT_COMPILER_PATH)/strip 267 else 268 STRIP = strip 269 endif