[thirdparty/gcc.git] / libstdc++-v3 / configure.host

# configure.host
#
# This shell script handles all host based configuration for libstdc++.
# It sets various shell variables based on the the host and the
# configuration options.  You can modify this shell script without needing
# to rerun autoconf/aclocal/etc.  This file is "sourced" not executed.
#
# You should read docs/html/17_intro/porting.* to make sense of this file.
#
#
# It uses the following shell variables as set by config.guess:
#   host                The configuration host (full CPU-vendor-OS triplet)
#   host_cpu            The configuration host CPU
#   host_os             The configuration host OS
#
#
# It sets the following shell variables:
#
#   cpu_include_dir        CPU-specific directory, defaults to cpu/generic
#                          if cpu/host_cpu doesn't exist.  This is not used
#                          directly, but sets the default for others.
#
#   os_include_dir         OS-specific directory, defaults to os/generic.
#
#   c_model                the "C" header model, defaults to c_global.
#
#   c_compatibility        if "C" compatibility headers are necessary,
#                          defaults to no.
#
#   abi_baseline_pair      directory name for ABI compat testing,
#                          defaults to host_cpu-host_os (as per config.guess)
#
#   abi_baseline_subdir_switch
#			   g++ switch to determine ABI baseline subdir for
#			   multilibbed targets,
#			   defaults to --print-multi-directory
#
#   abi_tweaks_dir         location of cxxabi_tweaks.h,
#                          defaults to cpu_include_dir
#
#   atomicity_dir          location of atomicity.h,
#                          defaults to cpu_include_dir
#
#   atomic_word_dir        location of atomic_word.h
#                          defaults to generic.
#
#   atomic_flags           extra flags to pass to use atomic instructions
#                          defaults to nothing.
#
#   cpu_defines_dir        location of cpu_defines.h
#                          defaults to generic.
#
#   cpu_opt_bits_random    path name of random.h containing CPU-specific
#                          optimizations
#
#   cpu_opt_ext_random     path name of random.h containing CPU-specific
#                          optimizations for extensions
#
#   error_constants_dir    location of error_constants.h
#                          defaults to os/generic.
#
# It possibly modifies the following variables:
#
#   OPT_LDFLAGS            extra flags to pass when linking the library, of
#                          the form '-Wl,blah'
#                          (defaults to empty in acinclude.m4)
#
#   port_specific_symbol_files
#                          whitespace-seperated list of files containing
#                          additional symbols to export from the shared
#                          library, when symbol versioning is in use
#
#
# If the defaults will not work for your platform, you need only change the
# variables that won't work, i.e., you do not need to explicitly set a
# working variable to its default.  Most hosts only need to change the two
# *_include_dir variables.


# DEFAULTS
# Try to guess a default cpu_include_dir based on the name of the CPU.  We
# cannot do this for os_include_dir; there are too many portable operating
# systems out there.  :-)
c_model=c_global
c_compatibility=no
atomic_word_dir=cpu/generic
atomic_flags=""
atomicity_dir="cpu/generic"
cpu_defines_dir="cpu/generic"
try_cpu=generic
abi_baseline_subdir_switch=--print-multi-directory
abi_tweaks_dir="cpu/generic"
error_constants_dir="os/generic"

# HOST-SPECIFIC OVERRIDES
# Set any CPU-dependent bits.

# Provide a way to funnel exotic flavors and prefixed/postfixed chip
# variants into the established source config/cpu/* sub-directories.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
case "${host_cpu}" in
  alpha*)
    try_cpu=alpha
    ;;
  arm*)
    try_cpu=arm
    ;;
  crisv32)
    try_cpu=cris
    ;;
  i[567]86 | x86_64)
    try_cpu=i486
    ;;
  hppa*)
    try_cpu=hppa
    ;;
  mep*)
    EXTRA_CXX_FLAGS=-mm
    try_cpu=generic
    ;;
  mips*)
    try_cpu=mips
    ;;
  powerpc* | rs6000)
    try_cpu=powerpc
    ;;
  sparc* | ultrasparc)
    try_cpu=sparc
    ;;
  *)
    if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
      try_cpu=${host_cpu}
    fi
esac


# Now look for the file(s) usually tied to a CPU model, and make
# default choices for those if they haven't been explicitly set
# already.  
cpu_include_dir=cpu/${try_cpu}


# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
case "${host_cpu}" in
  powerpc* | rs6000)
    cpu_defines_dir=cpu/powerpc
    ;;
esac


# Set specific CPU overrides for atomic_word_dir and atomic_flags. 
# Most can just use generic.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
case "${host_cpu}" in
  alpha*)
    atomic_word_dir=cpu/alpha
    ;;
  cris*)
    atomic_word_dir=cpu/cris
    ;;
  ia64)
    atomic_word_dir=cpu/ia64
    ;;
  i[4567]86 | x86_64)
    atomic_flags="-march=native"
    ;;
  powerpc* | rs6000)
    atomic_word_dir=cpu/powerpc
    ;;
  sparc* | ultrasparc)
    atomic_word_dir=cpu/sparc
    atomic_flags="-mcpu=v9"
    ;;
esac


# Set specific CPU overrides for atomicity_dir.
# This can be over-ridden in GLIBCXX_ENABLE_ATOMIC_BUILTINS.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
  atomicity_dir=$cpu_include_dir
fi


if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
  abi_tweaks_dir=$cpu_include_dir
fi


# Set directory with CPU-specific optimization
cpu_opt_dir=${cpu_include_dir}/opt
test -d ${glibcxx_srcdir}/config/${cpu_include_dir}/opt ||
cpu_opt_dir=cpu/generic/opt
# For each header with CPU-specific optimizations check whether it
# exists in ${cpu_opt_dir}.  If not, point the variable at the
# appropriate file in the generic directory.
cpu_opt_ext_random=${cpu_opt_dir}/ext/opt_random.h
test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} ||
cpu_opt_ext_random=cpu/generic/opt/ext/opt_random.h

cpu_opt_bits_random=${cpu_opt_dir}/bits/opt_random.h
test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} ||
cpu_opt_ext_random=cpu/generic/opt/bits/opt_random.h


# Set any OS-dependent bits.
# Set the os_include_dir.
# Set the error_costants_dir.
# Set c_model, c_compatibility here.
# If atomic ops and/or numeric limits are OS-specific rather than
# CPU-specifc, set those here too.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
case "${host_os}" in
  aix4.[3456789]* | aix[56789]*)
    # We set os_include_dir to os/aix only on AIX 4.3 and newer, but
    # os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
    # explicitly duplicate the directory for 4.[<3].
    os_include_dir="os/aix"
    atomicity_dir="os/aix"
    atomic_word_dir="os/aix"
    OPT_LDFLAGS="-Wl,-G"
    ;;
  aix4.*)
    os_include_dir="os/generic"
    atomicity_dir="os/aix"
    atomic_word_dir="os/aix"
    ;;
  aix*)
    os_include_dir="os/generic"
    atomicity_dir="cpu/generic"
    ;;
  bsd*)
    # Plain BSD attempts to share FreeBSD files.
    os_include_dir="os/bsd/freebsd"
    ;;
  cygwin*)
    os_include_dir="os/newlib"
    OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
    ;;
  darwin | darwin[1-7] | darwin[1-7].*)
    # On Darwin, performance is improved if libstdc++ is single-module.
    # Up to at least 10.3.7, -flat_namespace is required for proper
    # treatment of coalesced symbols.
    OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
    os_include_dir="os/bsd/darwin"
    ;;
  darwin[89] | darwin[89].* | darwin[1-9][0-9]* )
    # On Darwin, performance is improved if libstdc++ is single-module,
    # and on 8+ compatibility is better if not -flat_namespace.
    OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
    case "${host_cpu}" in
      i[34567]86 | x86_64)
        OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden"
        ;;
    esac
    os_include_dir="os/bsd/darwin"
    ;;
  *djgpp*)      # leading * picks up "msdosdjgpp"
    os_include_dir="os/djgpp"
    error_constants_dir="os/djgpp"
    ;;
  freebsd*)
    os_include_dir="os/bsd/freebsd"
    ;;
  gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
    if [ "$uclibc" = "yes" ]; then
      os_include_dir="os/uclibc"
    elif [ "$bionic" = "yes" ]; then
      os_include_dir="os/bionic"
    else
      os_include_dir="os/gnu-linux"
    fi
    ;;
  hpux*)
    os_include_dir="os/hpux"
    ;;
  mingw32*)
    case "$host" in
      *-w64-*)
        os_include_dir="os/mingw32-w64"
        error_constants_dir="os/mingw32-w64"
        ;;
      *)
        os_include_dir="os/mingw32"
        error_constants_dir="os/mingw32"
        ;;
    esac
    OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
    ;;
  netbsd*)
    os_include_dir="os/bsd/netbsd"
    ;;
  openbsd*)
    os_include_dir="os/bsd/openbsd"
    ;;
  qnx6.[12]*)
    os_include_dir="os/qnx/qnx6.1"
    c_model=c
    ;;
  solaris2)
    # This too-vague configuration does not provide enough information
    # to select a ctype include, and thus os_include_dir is a crap shoot.
    echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
    exit 1
    ;;
  solaris2.9 | solaris2.1[0-9])
    os_include_dir="os/solaris/solaris2.9"
    ;;
  tpf)
    os_include_dir="os/tpf"
    ;;
  vxworks)
    os_include_dir="os/vxworks"
    ;;
  *)
    os_include_dir="os/generic"
    ;;
esac


# Set any OS-dependent and CPU-dependent bits.
# THIS TABLE IS SORTED.  KEEP IT THAT WAY.
case "${host}" in
  *-*-linux*)
    case "${host_cpu}" in
      i[567]86)
        abi_baseline_pair=i486-linux-gnu
        ;;
      mips64*)
	abi_baseline_pair=mips64-linux-gnu
	;;
      powerpc64)
        abi_baseline_pair=powerpc64-linux-gnu
        ;;
      s390)
        abi_baseline_pair=s390-linux-gnu
        ;;
      s390x)
        abi_baseline_pair=s390x-linux-gnu
        ;;
      x86_64)
        abi_baseline_pair=x86_64-linux-gnu
        ;;
      *)
        if test -d ${glibcxx_srcdir}/config/abi/post/${try_cpu}-linux-gnu; then
          abi_baseline_pair=${try_cpu}-linux-gnu
        fi
    esac
    case "${host}" in
      arm*-*-linux-*)
	port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
	;;
    esac
    ;;
  powerpc*-*-darwin*)
    port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
    ;;
  *-*-solaris2.9)
    abi_baseline_pair=solaris2.9
    abi_baseline_subdir_switch=--print-multi-os-directory
    ;;
  *-*-solaris2.1[0-9])
    abi_baseline_pair=solaris2.10
    abi_baseline_subdir_switch=--print-multi-os-directory
    ;;
esac
Commit	Line	Data
b731048b	1	# configure.host
2c839a4e	2	#
b731048b BK	3	# This shell script handles all host based configuration for libstdc++.
b731048b BK	4	# It sets various shell variables based on the the host and the
2c839a4e PE	5	# configuration options. You can modify this shell script without needing
	6	# to rerun autoconf/aclocal/etc. This file is "sourced" not executed.
	7	#
	8	# You should read docs/html/17_intro/porting.* to make sense of this file.
	9	#
	10	#
	11	# It uses the following shell variables as set by config.guess:
b731048b BK	12	# host The configuration host (full CPU-vendor-OS triplet)
	13	# host_cpu The configuration host CPU
	14	# host_os The configuration host OS
2c839a4e PE	15	#
	16	#
	17	# It sets the following shell variables:
	18	#
	19	# cpu_include_dir CPU-specific directory, defaults to cpu/generic
7d3998a4 PE	20	# if cpu/host_cpu doesn't exist. This is not used
7d3998a4 PE	21	# directly, but sets the default for others.
2c839a4e PE	22	#
	23	# os_include_dir OS-specific directory, defaults to os/generic.
	24	#
803f183a	25	# c_model the "C" header model, defaults to c_global.
e01c9849	26	#
17640f24	27	# c_compatibility if "C" compatibility headers are necessary,
ef16a298	28	# defaults to no.
2c839a4e	29	#
ef16a298 BK	30	# abi_baseline_pair directory name for ABI compat testing,
ef16a298 BK	31	# defaults to host_cpu-host_os (as per config.guess)
314b5a68	32	#
00fc1bf6 RO	33	# abi_baseline_subdir_switch
	34	# g++ switch to determine ABI baseline subdir for
	35	# multilibbed targets,
	36	# defaults to --print-multi-directory
	37	#
7d3998a4 PE	38	# abi_tweaks_dir location of cxxabi_tweaks.h,
	39	# defaults to cpu_include_dir
	40	#
2c5d0ae8	41	# atomicity_dir location of atomicity.h,
ef16a298	42	# defaults to cpu_include_dir
ca017eef	43	#
2c5d0ae8 BK	44	# atomic_word_dir location of atomic_word.h
	45	# defaults to generic.
	46	#
c2ba9709 JS	47	# atomic_flags extra flags to pass to use atomic instructions
	48	# defaults to nothing.
	49	#
4b90c838 PC	50	# cpu_defines_dir location of cpu_defines.h
	51	# defaults to generic.
	52	#
48c7b524	53	# cpu_opt_bits_random path name of random.h containing CPU-specific
9bf714c2	54	# optimizations
e4bf5dfc	55	#
48c7b524 UD	56	# cpu_opt_ext_random path name of random.h containing CPU-specific
	57	# optimizations for extensions
	58	#
e4bf5dfc DS	59	# error_constants_dir location of error_constants.h
	60	# defaults to os/generic.
	61	#
2c839a4e PE	62	# It possibly modifies the following variables:
	63	#
	64	# OPT_LDFLAGS extra flags to pass when linking the library, of
ef16a298 BK	65	# the form '-Wl,blah'
ef16a298 BK	66	# (defaults to empty in acinclude.m4)
2c839a4e	67	#
58579a27	68	# port_specific_symbol_files
e6b7a69a	69	# whitespace-seperated list of files containing
ff66d28f PE	70	# additional symbols to export from the shared
ff66d28f PE	71	# library, when symbol versioning is in use
e6b7a69a	72	#
2c839a4e PE	73	#
	74	# If the defaults will not work for your platform, you need only change the
	75	# variables that won't work, i.e., you do not need to explicitly set a
b731048b	76	# working variable to its default. Most hosts only need to change the two
2c839a4e	77	# *_include_dir variables.
d0941a31	78
d0941a31	79
e01c9849	80	# DEFAULTS
2c839a4e PE	81	# Try to guess a default cpu_include_dir based on the name of the CPU. We
	82	# cannot do this for os_include_dir; there are too many portable operating
	83	# systems out there. :-)
af13a7a6	84	c_model=c_global
85ab9d23	85	c_compatibility=no
2c5d0ae8	86	atomic_word_dir=cpu/generic
c2ba9709	87	atomic_flags=""
701a3eee BK	88	atomicity_dir="cpu/generic"
	89	cpu_defines_dir="cpu/generic"
	90	try_cpu=generic
00fc1bf6	91	abi_baseline_subdir_switch=--print-multi-directory
701a3eee	92	abi_tweaks_dir="cpu/generic"
e4bf5dfc	93	error_constants_dir="os/generic"
2c839a4e	94
b731048b	95	# HOST-SPECIFIC OVERRIDES
e01c9849	96	# Set any CPU-dependent bits.
ef16a298	97
701a3eee BK	98	# Provide a way to funnel exotic flavors and prefixed/postfixed chip
701a3eee BK	99	# variants into the established source config/cpu/* sub-directories.
d0941a31	100	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
b731048b	101	case "${host_cpu}" in
d0941a31	102	alpha*)
ef16a298	103	try_cpu=alpha
d0941a31	104	;;
cd985f66	105	arm*)
7d3998a4 PE	106	try_cpu=arm
7d3998a4 PE	107	;;
06785812 HPN	108	crisv32)
	109	try_cpu=cris
	110	;;
e6b7a69a	111	i[567]86 \| x86_64)
ef16a298	112	try_cpu=i486
d0941a31	113	;;
49dd74ef	114	hppa*)
ef16a298	115	try_cpu=hppa
49dd74ef	116	;;
7acf4da6 DD	117	mep*)
	118	EXTRA_CXX_FLAGS=-mm
	119	try_cpu=generic
	120	;;
92d568f2	121	mips*)
701a3eee	122	try_cpu=mips
92d568f2	123	;;
bd11db39	124	powerpc* \| rs6000)
ef16a298	125	try_cpu=powerpc
d0941a31	126	;;
0fe707cc	127	sparc* \| ultrasparc)
ef16a298 BK	128	try_cpu=sparc
	129	;;
	130	*)
1568430f	131	if test -d ${glibcxx_srcdir}/config/cpu/${host_cpu}; then
bbdfb3e8	132	try_cpu=${host_cpu}
bbdfb3e8	133	fi
d0941a31 PE	134	esac
d0941a31 PE	135
701a3eee BK	136
	137	# Now look for the file(s) usually tied to a CPU model, and make
	138	# default choices for those if they haven't been explicitly set
	139	# already.
	140	cpu_include_dir=cpu/${try_cpu}
	141
2c5d0ae8	142
4b90c838 PC	143	# Set specific CPU overrides for cpu_defines_dir. Most can just use generic.
	144	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	145	case "${host_cpu}" in
460d832b	146	powerpc* \| rs6000)
4b90c838 PC	147	cpu_defines_dir=cpu/powerpc
	148	;;
	149	esac
	150
2c839a4e	151
c2ba9709 JS	152	# Set specific CPU overrides for atomic_word_dir and atomic_flags.
c2ba9709 JS	153	# Most can just use generic.
701a3eee	154	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
7c499eeb	155	case "${host_cpu}" in
701a3eee BK	156	alpha*)
701a3eee BK	157	atomic_word_dir=cpu/alpha
7c499eeb	158	;;
701a3eee BK	159	cris*)
	160	atomic_word_dir=cpu/cris
	161	;;
	162	ia64)
	163	atomic_word_dir=cpu/ia64
	164	;;
bdfb7c6d	165	i[4567]86 \| x86_64)
c2ba9709 JS	166	atomic_flags="-march=native"
c2ba9709 JS	167	;;
701a3eee BK	168	powerpc* \| rs6000)
	169	atomic_word_dir=cpu/powerpc
	170	;;
	171	sparc* \| ultrasparc)
	172	atomic_word_dir=cpu/sparc
c2ba9709	173	atomic_flags="-mcpu=v9"
7c499eeb PC	174	;;
7c499eeb PC	175	esac
1568430f	176
701a3eee BK	177
	178	# Set specific CPU overrides for atomicity_dir.
	179	# This can be over-ridden in GLIBCXX_ENABLE_ATOMIC_BUILTINS.
	180	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
	181	if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/atomicity.h ; then
	182	atomicity_dir=$cpu_include_dir
	183	fi
	184
	185
1568430f PB	186	if test -f ${glibcxx_srcdir}/config/${cpu_include_dir}/cxxabi_tweaks.h ; then
1568430f PB	187	abi_tweaks_dir=$cpu_include_dir
1568430f	188	fi
2c839a4e	189
701a3eee	190
9bf714c2 UD	191	# Set directory with CPU-specific optimization
	192	cpu_opt_dir=${cpu_include_dir}/opt
	193	test -d ${glibcxx_srcdir}/config/${cpu_include_dir}/opt \|\|
	194	cpu_opt_dir=cpu/generic/opt
	195	# For each header with CPU-specific optimizations check whether it
	196	# exists in ${cpu_opt_dir}. If not, point the variable at the
	197	# appropriate file in the generic directory.
	198	cpu_opt_ext_random=${cpu_opt_dir}/ext/opt_random.h
	199	test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} \|\|
	200	cpu_opt_ext_random=cpu/generic/opt/ext/opt_random.h
	201
48c7b524 UD	202	cpu_opt_bits_random=${cpu_opt_dir}/bits/opt_random.h
	203	test -f ${glibcxx_srcdir}/config/${cpu_opt_ext_random} \|\|
	204	cpu_opt_ext_random=cpu/generic/opt/bits/opt_random.h
	205
9bf714c2	206
e01c9849	207	# Set any OS-dependent bits.
17640f24	208	# Set the os_include_dir.
e4bf5dfc	209	# Set the error_costants_dir.
e01c9849 BK	210	# Set c_model, c_compatibility here.
	211	# If atomic ops and/or numeric limits are OS-specific rather than
	212	# CPU-specifc, set those here too.
d0941a31	213	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
b731048b	214	case "${host_os}" in
527b03ed	215	aix4.[3456789]* \| aix[56789]*)
2c839a4e	216	# We set os_include_dir to os/aix only on AIX 4.3 and newer, but
d32e25df	217	# os/aix/atomicity.h works on earlier versions of AIX 4.*, so we
2c839a4e PE	218	# explicitly duplicate the directory for 4.[<3].
2c839a4e PE	219	os_include_dir="os/aix"
2c5d0ae8	220	atomicity_dir="os/aix"
7afe555c	221	atomic_word_dir="os/aix"
34e3a8d5	222	OPT_LDFLAGS="-Wl,-G"
d0941a31	223	;;
2c839a4e	224	aix4.*)
47395a24	225	os_include_dir="os/generic"
2c5d0ae8	226	atomicity_dir="os/aix"
7afe555c	227	atomic_word_dir="os/aix"
2c839a4e PE	228	;;
2c839a4e PE	229	aix*)
47395a24	230	os_include_dir="os/generic"
2c5d0ae8	231	atomicity_dir="cpu/generic"
2c839a4e	232	;;
8478f170 LR	233	bsd*)
8478f170 LR	234	# Plain BSD attempts to share FreeBSD files.
2c839a4e	235	os_include_dir="os/bsd/freebsd"
d0941a31	236	;;
c383aafd	237	cygwin*)
2c839a4e	238	os_include_dir="os/newlib"
7de6ba7a	239	OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
2c839a4e	240	;;
ae59b55c	241	darwin \| darwin[1-7] \| darwin[1-7].*)
f1a66265	242	# On Darwin, performance is improved if libstdc++ is single-module.
ae59b55c	243	# Up to at least 10.3.7, -flat_namespace is required for proper
f1a66265 GK	244	# treatment of coalesced symbols.
f1a66265 GK	245	OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module -Wl,-flat_namespace"
f9686024	246	os_include_dir="os/bsd/darwin"
f1a66265	247	;;
ae59b55c GK	248	darwin[89] \| darwin[89].* \| darwin[1-9][0-9]* )
	249	# On Darwin, performance is improved if libstdc++ is single-module,
	250	# and on 8+ compatibility is better if not -flat_namespace.
	251	OPT_LDFLAGS="${OPT_LDFLAGS} -Wl,-single_module"
62801a96 HH	252	case "${host_cpu}" in
	253	i[34567]86 \| x86_64)
	254	OPTIMIZE_CXXFLAGS="${OPTIMIZE_CXXFLAGS} -fvisibility-inlines-hidden"
	255	;;
	256	esac
ae59b55c GK	257	os_include_dir="os/bsd/darwin"
ae59b55c GK	258	;;
2c839a4e PE	259	djgpp) # leading * picks up "msdosdjgpp"
2c839a4e PE	260	os_include_dir="os/djgpp"
a51d1999	261	error_constants_dir="os/djgpp"
c383aafd	262	;;
8478f170 LR	263	freebsd*)
8478f170 LR	264	os_include_dir="os/bsd/freebsd"
8478f170	265	;;
b938ad89	266	gnu* \| linux* \| kfreebsd-gnu \| knetbsd-gnu)
464aea98 JM	267	if [ "$uclibc" = "yes" ]; then
464aea98 JM	268	os_include_dir="os/uclibc"
aa6a73b9 MK	269	elif [ "$bionic" = "yes" ]; then
aa6a73b9 MK	270	os_include_dir="os/bionic"
464aea98 JM	271	else
	272	os_include_dir="os/gnu-linux"
	273	fi
6f87af20	274	;;
2c839a4e PE	275	hpux*)
2c839a4e PE	276	os_include_dir="os/hpux"
d0941a31	277	;;
944effb6	278	mingw32*)
d7a3ef97 JY	279	case "$host" in
	280	-w64-)
	281	os_include_dir="os/mingw32-w64"
	282	error_constants_dir="os/mingw32-w64"
	283	;;
	284	*)
	285	os_include_dir="os/mingw32"
	286	error_constants_dir="os/mingw32"
	287	;;
	288	esac
7de6ba7a	289	OPT_LDFLAGS="${OPT_LDFLAGS} \$(lt_host_flags)"
944effb6	290	;;
11b176c1	291	netbsd*)
2c839a4e	292	os_include_dir="os/bsd/netbsd"
11b176c1	293	;;
1f726ff8 MK	294	openbsd*)
	295	os_include_dir="os/bsd/openbsd"
	296	;;
ff66d28f PE	297	qnx6.[12]*)
	298	os_include_dir="os/qnx/qnx6.1"
	299	c_model=c
	300	;;
43892f8c BK	301	solaris2)
	302	# This too-vague configuration does not provide enough information
	303	# to select a ctype include, and thus os_include_dir is a crap shoot.
	304	echo "Please specify the full version of Solaris, ie. solaris2.9 " 1>&2
7d3998a4	305	exit 1
43892f8c	306	;;
7888f266 RO	307	solaris2.9 \| solaris2.1[0-9])
7888f266 RO	308	os_include_dir="os/solaris/solaris2.9"
a1998fab	309	;;
6e198ee0 UW	310	tpf)
	311	os_include_dir="os/tpf"
	312	;;
65fc9769 PE	313	vxworks)
	314	os_include_dir="os/vxworks"
	315	;;
d0941a31	316	*)
2c839a4e	317	os_include_dir="os/generic"
d0941a31 PE	318	;;
	319	esac
	320
	321
e01c9849	322	# Set any OS-dependent and CPU-dependent bits.
d0941a31	323	# THIS TABLE IS SORTED. KEEP IT THAT WAY.
b731048b	324	case "${host}" in
701a3eee BK	325	--linux*)
	326	case "${host_cpu}" in
	327	i[567]86)
	328	abi_baseline_pair=i486-linux-gnu
	329	;;
8deecedf AN	330	mips64*)
	331	abi_baseline_pair=mips64-linux-gnu
	332	;;
701a3eee BK	333	powerpc64)
	334	abi_baseline_pair=powerpc64-linux-gnu
	335	;;
	336	s390)
	337	abi_baseline_pair=s390-linux-gnu
	338	;;
	339	s390x)
	340	abi_baseline_pair=s390x-linux-gnu
	341	;;
	342	x86_64)
	343	abi_baseline_pair=x86_64-linux-gnu
	344	;;
	345	*)
	346	if test -d ${glibcxx_srcdir}/config/abi/post/${try_cpu}-linux-gnu; then
	347	abi_baseline_pair=${try_cpu}-linux-gnu
	348	fi
	349	esac
5194c5c1	350	case "${host}" in
9945a876	351	arm--linux-*)
5194c5c1 MM	352	port_specific_symbol_files="\$(srcdir)/../config/os/gnu-linux/arm-eabi-extra.ver"
	353	;;
	354	esac
701a3eee	355	;;
f9314d01 GK	356	powerpc--darwin*)
	357	port_specific_symbol_files="\$(srcdir)/../config/os/bsd/darwin/ppc-extra.ver"
	358	;;
7888f266 RO	359	--solaris2.9)
7888f266 RO	360	abi_baseline_pair=solaris2.9
00fc1bf6	361	abi_baseline_subdir_switch=--print-multi-os-directory
33f49367 RO	362	;;
	363	--solaris2.1[0-9])
	364	abi_baseline_pair=solaris2.10
00fc1bf6	365	abi_baseline_subdir_switch=--print-multi-os-directory
c18dc5cc	366	;;
6414587c	367	esac