1 # 2 # Copyright (c) 1999, 2010, 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, CPP & AS 27 28 ifdef ALT_COMPILER_PATH 29 CPP = $(ALT_COMPILER_PATH)/g++ 30 CC = $(ALT_COMPILER_PATH)/gcc 31 else 32 CPP = g++ 33 CC = gcc 34 endif 35 36 AS = $(CC) -c 37 38 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only 39 # prints the numbers (e.g. "2.95", "3.2.1") 40 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1) 41 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2) 42 43 # check for precompiled headers support 44 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0" 45 USE_PRECOMPILED_HEADER=1 46 PRECOMPILED_HEADER_DIR=. 47 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/incls/_precompiled.incl.gch 48 endif 49 50 51 #------------------------------------------------------------------------ 52 # Compiler flags 53 54 # position-independent code 55 PICFLAG = -fPIC 56 57 VM_PICFLAG/LIBJVM = $(PICFLAG) 58 VM_PICFLAG/AOUT = 59 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO)) 60 61 ifeq ($(ZERO_BUILD), true) 62 CFLAGS += $(LIBFFI_CFLAGS) 63 endif 64 ifeq ($(SHARK_BUILD), true) 65 CFLAGS += $(LLVM_CFLAGS) 66 endif 67 CFLAGS += $(VM_PICFLAG) 68 CFLAGS += -fno-rtti 69 CFLAGS += -fno-exceptions 70 CFLAGS += -D_REENTRANT 71 CFLAGS += -fcheck-new 72 73 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH)) 74 ARCHFLAG/i486 = -m32 -march=i586 75 ARCHFLAG/amd64 = -m64 76 ARCHFLAG/ia64 = 77 ARCHFLAG/sparc = -m32 -mcpu=v9 78 ARCHFLAG/sparcv9 = -m64 -mcpu=v9 79 ARCHFLAG/arm = -fsigned-char 80 ARCHFLAG/zero = $(ZERO_ARCHFLAG) 81 ifndef E500V2 82 ARCHFLAG/ppc = -mcpu=powerpc 83 endif 84 85 CFLAGS += $(ARCHFLAG) 86 AOUT_FLAGS += $(ARCHFLAG) 87 LFLAGS += $(ARCHFLAG) 88 ASFLAGS += $(ARCHFLAG) 89 90 ifdef E500V2 91 CFLAGS += -DE500V2 92 endif 93 94 # Use C++ Interpreter 95 ifdef CC_INTERP 96 CFLAGS += -DCC_INTERP 97 endif 98 99 # Build for embedded targets 100 ifdef JAVASE_EMBEDDED 101 CFLAGS += -DJAVASE_EMBEDDED 102 endif 103 104 # Keep temporary files (.ii, .s) 105 ifdef NEED_ASM 106 CFLAGS += -save-temps 107 else 108 CFLAGS += -pipe 109 endif 110 111 # Compiler warnings are treated as errors 112 WARNINGS_ARE_ERRORS = -Werror 113 114 # Except for a few acceptable ones 115 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit 116 # conversions which might affect the values. To avoid that, we need to turn 117 # it off explicitly. 118 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 119 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare 120 else 121 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare 122 endif 123 124 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS) 125 # Special cases 126 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 127 128 # The flags to use for an Optimized g++ build 129 OPT_CFLAGS += -O3 130 131 # Hotspot uses very unstrict aliasing turn this optimization off 132 OPT_CFLAGS += -fno-strict-aliasing 133 134 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 135 # if we use expensive-optimizations 136 ifeq ($(BUILDARCH), ia64) 137 OPT_CFLAGS += -fno-expensive-optimizations 138 endif 139 140 OPT_CFLAGS/NOOPT=-O0 141 142 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 143 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0" 144 OPT_CFLAGS/mulnode.o += -O0 145 endif 146 147 #------------------------------------------------------------------------ 148 # Linker flags 149 150 # statically link libstdc++.so, work with gcc but ignored by g++ 151 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 152 153 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x. 154 ifneq ("${CC_VER_MAJOR}", "2") 155 STATIC_LIBGCC += -static-libgcc 156 endif 157 158 ifeq ($(BUILDARCH), ia64) 159 LFLAGS += -Wl,-relax 160 endif 161 162 # Enable linker optimization 163 LFLAGS += -Xlinker -O1 164 165 # If this is a --hash-style=gnu system, use --hash-style=both 166 # The gnu .hash section won't work on some Linux systems like SuSE 10. 167 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu') 168 ifneq ($(_HAS_HASH_STYLE_GNU),) 169 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 170 endif 171 LFLAGS += $(LDFLAGS_HASH_STYLE) 172 173 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 174 MAPFLAG = -Xlinker --version-script=FILENAME 175 176 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj 177 SONAMEFLAG = -Xlinker -soname=SONAME 178 179 # Build shared library 180 SHARED_FLAG = -shared 181 182 # Keep symbols even they are not used 183 AOUT_FLAGS += -export-dynamic 184 185 #------------------------------------------------------------------------ 186 # Debug flags 187 188 # Use the stabs format for debugging information (this is the default 189 # on gcc-2.91). It's good enough, has all the information about line 190 # numbers and local variables, and libjvm_g.so is only about 16M. 191 # Change this back to "-g" if you want the most expressive format. 192 # (warning: that could easily inflate libjvm_g.so to 150M!) 193 # Note: The Itanium gcc compiler crashes when using -gstabs. 194 DEBUG_CFLAGS/ia64 = -g 195 DEBUG_CFLAGS/amd64 = -g 196 DEBUG_CFLAGS/arm = -g 197 DEBUG_CFLAGS/ppc = -g 198 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 199 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),) 200 DEBUG_CFLAGS += -gstabs 201 endif 202 203 # DEBUG_BINARIES overrides everything, use full -g debug information 204 ifeq ($(DEBUG_BINARIES), true) 205 DEBUG_CFLAGS = -g 206 CFLAGS += $(DEBUG_CFLAGS) 207 endif 208 209 # If we are building HEADLESS, pass on to VM 210 # so it can set the java.awt.headless property 211 ifdef HEADLESS 212 CFLAGS += -DHEADLESS 213 endif 214 215 # We are building Embedded for a small device 216 # favor code space over speed 217 ifdef MINIMIZE_RAM_USAGE 218 CFLAGS += -DMINIMIZE_RAM_USAGE 219 endif