1 # 2 # Copyright (c) 1999, 2009, 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 CPP = g++ 29 CC = gcc 30 AS = $(CC) -c 31 32 # -dumpversion in gcc-2.91 shows "egcs-2.91.66". In later version, it only 33 # prints the numbers (e.g. "2.95", "3.2.1") 34 CC_VER_MAJOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f1) 35 CC_VER_MINOR := $(shell $(CC) -dumpversion | sed 's/egcs-//' | cut -d'.' -f2) 36 37 # check for precompiled headers support 38 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 3 \) \| \( \( $(CC_VER_MAJOR) = 3 \) \& \( $(CC_VER_MINOR) \>= 4 \) \))" "0" 39 USE_PRECOMPILED_HEADER=1 40 PRECOMPILED_HEADER_DIR=. 41 PRECOMPILED_HEADER=$(PRECOMPILED_HEADER_DIR)/incls/_precompiled.incl.gch 42 endif 43 44 45 #------------------------------------------------------------------------ 46 # Compiler flags 47 48 # position-independent code 49 PICFLAG = -fPIC 50 51 VM_PICFLAG/LIBJVM = $(PICFLAG) 52 VM_PICFLAG/AOUT = 53 VM_PICFLAG = $(VM_PICFLAG/$(LINK_INTO)) 54 55 ifeq ($(ZERO_BUILD), true) 56 CFLAGS += $(LIBFFI_CFLAGS) 57 endif 58 CFLAGS += $(VM_PICFLAG) 59 CFLAGS += -fno-rtti 60 CFLAGS += -fno-exceptions 61 CFLAGS += -D_REENTRANT 62 CFLAGS += -fcheck-new 63 64 ARCHFLAG = $(ARCHFLAG/$(BUILDARCH)) 65 ARCHFLAG/i486 = -m32 -march=i586 66 ARCHFLAG/amd64 = -m64 67 ARCHFLAG/ia64 = 68 ARCHFLAG/sparc = -m32 -mcpu=v9 69 ARCHFLAG/sparcv9 = -m64 -mcpu=v9 70 ARCHFLAG/zero = $(ZERO_ARCHFLAG) 71 72 CFLAGS += $(ARCHFLAG) 73 AOUT_FLAGS += $(ARCHFLAG) 74 LFLAGS += $(ARCHFLAG) 75 ASFLAGS += $(ARCHFLAG) 76 77 # Use C++ Interpreter 78 ifdef CC_INTERP 79 CFLAGS += -DCC_INTERP 80 endif 81 82 # Keep temporary files (.ii, .s) 83 ifdef NEED_ASM 84 CFLAGS += -save-temps 85 else 86 CFLAGS += -pipe 87 endif 88 89 # Compiler warnings are treated as errors 90 WARNINGS_ARE_ERRORS = -Werror 91 92 # Except for a few acceptable ones 93 # Since GCC 4.3, -Wconversion has changed its meanings to warn these implicit 94 # conversions which might affect the values. To avoid that, we need to turn 95 # it off explicitly. 96 ifneq "$(shell expr \( $(CC_VER_MAJOR) \> 4 \) \| \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) \>= 3 \) \))" "0" 97 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wsign-compare 98 else 99 ACCEPTABLE_WARNINGS = -Wpointer-arith -Wconversion -Wsign-compare 100 endif 101 102 CFLAGS_WARN/DEFAULT = $(WARNINGS_ARE_ERRORS) $(ACCEPTABLE_WARNINGS) 103 # Special cases 104 CFLAGS_WARN/BYFILE = $(CFLAGS_WARN/$@)$(CFLAGS_WARN/DEFAULT$(CFLAGS_WARN/$@)) 105 106 # The flags to use for an Optimized g++ build 107 OPT_CFLAGS += -O3 108 109 # Hotspot uses very unstrict aliasing turn this optimization off 110 OPT_CFLAGS += -fno-strict-aliasing 111 112 # The gcc compiler segv's on ia64 when compiling bytecodeInterpreter.cpp 113 # if we use expensive-optimizations 114 ifeq ($(BUILDARCH), ia64) 115 OPT_CFLAGS += -fno-expensive-optimizations 116 endif 117 118 OPT_CFLAGS/NOOPT=-O0 119 120 # 6835796. Problem in GCC 4.3.0 with mulnode.o optimized compilation. 121 ifneq "$(shell expr \( \( $(CC_VER_MAJOR) = 4 \) \& \( $(CC_VER_MINOR) = 3 \) \))" "0" 122 OPT_CFLAGS/mulnode.o += -O0 123 endif 124 125 #------------------------------------------------------------------------ 126 # Linker flags 127 128 # statically link libstdc++.so, work with gcc but ignored by g++ 129 STATIC_STDCXX = -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic 130 131 # statically link libgcc and/or libgcc_s, libgcc does not exist before gcc-3.x. 132 ifneq ("${CC_VER_MAJOR}", "2") 133 STATIC_LIBGCC += -static-libgcc 134 endif 135 136 ifeq ($(BUILDARCH), ia64) 137 LFLAGS += -Wl,-relax 138 endif 139 140 # Enable linker optimization 141 LFLAGS += -Xlinker -O1 142 143 # If this is a --hash-style=gnu system, use --hash-style=both 144 # The gnu .hash section won't work on some Linux systems like SuSE 10. 145 _HAS_HASH_STYLE_GNU:=$(shell $(CC) -dumpspecs | grep -- '--hash-style=gnu') 146 ifneq ($(_HAS_HASH_STYLE_GNU),) 147 LDFLAGS_HASH_STYLE = -Wl,--hash-style=both 148 endif 149 LFLAGS += $(LDFLAGS_HASH_STYLE) 150 151 # Use $(MAPFLAG:FILENAME=real_file_name) to specify a map file. 152 MAPFLAG = -Xlinker --version-script=FILENAME 153 154 # Use $(SONAMEFLAG:SONAME=soname) to specify the intrinsic name of a shared obj 155 SONAMEFLAG = -Xlinker -soname=SONAME 156 157 # Build shared library 158 SHARED_FLAG = -shared 159 160 # Keep symbols even they are not used 161 AOUT_FLAGS += -export-dynamic 162 163 #------------------------------------------------------------------------ 164 # Debug flags 165 166 # Use the stabs format for debugging information (this is the default 167 # on gcc-2.91). It's good enough, has all the information about line 168 # numbers and local variables, and libjvm_g.so is only about 16M. 169 # Change this back to "-g" if you want the most expressive format. 170 # (warning: that could easily inflate libjvm_g.so to 150M!) 171 # Note: The Itanium gcc compiler crashes when using -gstabs. 172 DEBUG_CFLAGS/ia64 = -g 173 DEBUG_CFLAGS/amd64 = -g 174 DEBUG_CFLAGS += $(DEBUG_CFLAGS/$(BUILDARCH)) 175 ifeq ($(DEBUG_CFLAGS/$(BUILDARCH)),) 176 DEBUG_CFLAGS += -gstabs 177 endif 178 179 # DEBUG_BINARIES overrides everything, use full -g debug information 180 ifeq ($(DEBUG_BINARIES), true) 181 DEBUG_CFLAGS = -g 182 CFLAGS += $(DEBUG_CFLAGS) 183 endif