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