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