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