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