@@ -81,10 +81,6 @@ will be used, and CFLAGS sets optimization options for the compiler.
library will still be usable, but functionality may be lost--for
example, you can't build a shared libc with old binutils.
-'--without-fp'
- Use this option if your computer lacks hardware floating-point
- support and your operating system does not emulate an FPU.
-
'--disable-shared'
Don't build shared libraries even if it is possible. Not all
systems support shared libraries; you need ELF support and
@@ -76,6 +76,11 @@ Deprecated and removed features, and other changes affecting compatibility:
glibc has been removed. The --enable-add-ons configure option is now
ignored.
+* The --without-fp configure option is now ignored. Whether hardware
+ floating-point instructions are used is now configured based on whether
+ the compiler used at configure time (without any options implied by a
+ --with-cpu= configure option) uses such instructions.
+
* The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
the specified string can be parsed as a domain name.
@@ -57,7 +57,7 @@ have-z-execstack = @libc_cv_z_execstack@
have-protected-data = @libc_cv_protected_data@
have-insert = @libc_cv_insert@
have-glob-dat-reloc = @libc_cv_has_glob_dat@
-with-fp = @with_fp@
+with-fp = @libc_cv_with_fp@
enable-timezone-tools = @enable_timezone_tools@
unwind-find-fde = @libc_cv_gcc_unwind_find_fde@
have-fpie = @libc_cv_fpie@
@@ -666,6 +666,7 @@ multi_arch
no_stack_protector
stack_protector
libc_cv_ssp
+libc_cv_with_fp
base_machine
have_tunables
build_pt_chown
@@ -683,7 +684,6 @@ hardcoded_path_in_tests
enable_timezone_tools
use_default_link
sysheaders
-with_fp
ac_ct_CXX
CXXFLAGS
CXX
@@ -756,7 +756,6 @@ with_bugurl
with_gd
with_gd_include
with_gd_lib
-with_fp
with_binutils
with_selinux
with_headers
@@ -1467,7 +1466,6 @@ Optional Packages:
--with-gd=DIR find libgd include dir and library with prefix DIR
--with-gd-include=DIR find libgd include files in DIR
--with-gd-lib=DIR find libgd library files in DIR
- --with-fp if using floating-point hardware [default=yes]
--with-binutils=PATH specify location of binutils (as and ld)
--with-selinux if building with SELinux support
--with-headers=PATH location of system headers to use (for example
@@ -3294,15 +3292,6 @@ libgd-LDFLAGS = $libgd_ldflags"
fi
-# Check whether --with-fp was given.
-if test "${with_fp+set}" = set; then :
- withval=$with_fp; with_fp=$withval
-else
- with_fp=yes
-fi
-
-
-
# Check whether --with-binutils was given.
if test "${with_binutils+set}" = set; then :
withval=$with_binutils; path_binutils=$withval
@@ -3778,6 +3767,11 @@ fi
# check below.
libc_config_ok=no
+# A preconfigure script for a system that may or may not use fpu
+# sysdeps directories sets this to a preprocessor conditional for
+# whether to use such directories.
+with_fp_cond=1
+
if frags=`ls -d $srcdir/sysdeps/*/preconfigure 2> /dev/null`
then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sysdeps preconfigure fragments" >&5
@@ -3816,6 +3810,30 @@ fi
test -n "$base_machine" || base_machine=$machine
+# Determine whether to use fpu or nofpu sysdeps directories.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for use of fpu sysdeps directories" >&5
+$as_echo_n "checking for use of fpu sysdeps directories... " >&6; }
+if ${libc_cv_with_fp+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat > conftest.c <<EOF
+#if $with_fp_cond
+int dummy;
+#else
+# error "no hardware floating point"
+#endif
+EOF
+libc_cv_with_fp=no
+if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \
+ 1>&5 2>&5 ; then
+ libc_cv_with_fp=yes
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_with_fp" >&5
+$as_echo "$libc_cv_with_fp" >&6; }
+
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fstack-protector" >&5
$as_echo_n "checking for -fstack-protector... " >&6; }
if ${libc_cv_ssp+:} false; then :
@@ -4085,7 +4103,7 @@ tail=$machine${submachine:+/$submachine}
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
set $m
# Prepend the machine's FPU directory unless --without-fp.
- if test "$with_fp" = yes; then
+ if test "$libc_cv_with_fp" = yes; then
maybe_fpu=/fpu
else
maybe_fpu=/nofpu
@@ -127,12 +127,6 @@ libgd-LDFLAGS = $libgd_ldflags"
fi
dnl Arguments to specify presence of other packages/features.
-AC_ARG_WITH([fp],
- AC_HELP_STRING([--with-fp],
- [if using floating-point hardware @<:@default=yes@:>@]),
- [with_fp=$withval],
- [with_fp=yes])
-AC_SUBST(with_fp)
AC_ARG_WITH([binutils],
AC_HELP_STRING([--with-binutils=PATH],
[specify location of binutils (as and ld)]),
@@ -489,6 +483,11 @@ AC_ARG_WITH([cpu],
# check below.
libc_config_ok=no
+# A preconfigure script for a system that may or may not use fpu
+# sysdeps directories sets this to a preprocessor conditional for
+# whether to use such directories.
+with_fp_cond=1
+
dnl Let sysdeps/*/preconfigure act here.
LIBC_PRECONFIGURE([$srcdir], [for sysdeps])
@@ -517,6 +516,24 @@ fi
test -n "$base_machine" || base_machine=$machine
AC_SUBST(base_machine)
+# Determine whether to use fpu or nofpu sysdeps directories.
+AC_CACHE_CHECK([for use of fpu sysdeps directories],
+ libc_cv_with_fp, [dnl
+cat > conftest.c <<EOF
+#if $with_fp_cond
+int dummy;
+#else
+# error "no hardware floating point"
+#endif
+EOF
+libc_cv_with_fp=no
+if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \
+ 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
+ libc_cv_with_fp=yes
+fi
+rm -f conftest*])
+AC_SUBST(libc_cv_with_fp)
+
AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl
LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector],
[libc_cv_ssp=yes],
@@ -720,7 +737,7 @@ tail=$machine${submachine:+/$submachine}
while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do
set $m
# Prepend the machine's FPU directory unless --without-fp.
- if test "$with_fp" = yes; then
+ if test "$libc_cv_with_fp" = yes; then
maybe_fpu=/fpu
else
maybe_fpu=/nofpu
@@ -106,10 +106,6 @@ problem and suppress these constructs, so that the library will still be
usable, but functionality may be lost---for example, you can't build a
shared libc with old binutils.
-@item --without-fp
-Use this option if your computer lacks hardware floating-point support
-and your operating system does not emulate an FPU.
-
@c disable static doesn't work currently
@c @item --disable-static
@c Don't build static libraries. Static libraries aren't that useful these
@@ -216,15 +216,12 @@ class Context(object):
os_name='linux-gnu',
variant='soft',
gcc_cfg=['--with-mips-plt', '--with-float=soft'],
- glibcs=[{'variant': 'n32-soft',
- 'cfg': ['--without-fp']},
+ glibcs=[{'variant': 'n32-soft'},
{'variant': 'soft',
'arch': 'mips',
- 'ccopts': '-mabi=32',
- 'cfg': ['--without-fp']},
+ 'ccopts': '-mabi=32'},
{'variant': 'n64-soft',
- 'ccopts': '-mabi=64',
- 'cfg': ['--without-fp']}])
+ 'ccopts': '-mabi=64'}])
self.add_config(arch='mips64',
os_name='linux-gnu',
variant='nan2008',
@@ -244,15 +241,12 @@ class Context(object):
'--with-arch-64=mips64r2',
'--with-arch-32=mips32r2',
'--with-float=soft'],
- glibcs=[{'variant': 'n32-nan2008-soft',
- 'cfg': ['--without-fp']},
+ glibcs=[{'variant': 'n32-nan2008-soft'},
{'variant': 'nan2008-soft',
'arch': 'mips',
- 'ccopts': '-mabi=32',
- 'cfg': ['--without-fp']},
+ 'ccopts': '-mabi=32'},
{'variant': 'n64-nan2008-soft',
- 'ccopts': '-mabi=64',
- 'cfg': ['--without-fp']}])
+ 'ccopts': '-mabi=64'}])
self.add_config(arch='mips64el',
os_name='linux-gnu',
gcc_cfg=['--with-mips-plt'],
@@ -265,15 +259,12 @@ class Context(object):
os_name='linux-gnu',
variant='soft',
gcc_cfg=['--with-mips-plt', '--with-float=soft'],
- glibcs=[{'variant': 'n32-soft',
- 'cfg': ['--without-fp']},
+ glibcs=[{'variant': 'n32-soft'},
{'variant': 'soft',
'arch': 'mipsel',
- 'ccopts': '-mabi=32',
- 'cfg': ['--without-fp']},
+ 'ccopts': '-mabi=32'},
{'variant': 'n64-soft',
- 'ccopts': '-mabi=64',
- 'cfg': ['--without-fp']}])
+ 'ccopts': '-mabi=64'}])
self.add_config(arch='mips64el',
os_name='linux-gnu',
variant='nan2008',
@@ -293,15 +284,12 @@ class Context(object):
'--with-arch-64=mips64r2',
'--with-arch-32=mips32r2',
'--with-float=soft'],
- glibcs=[{'variant': 'n32-nan2008-soft',
- 'cfg': ['--without-fp']},
+ glibcs=[{'variant': 'n32-nan2008-soft'},
{'variant': 'nan2008-soft',
'arch': 'mipsel',
- 'ccopts': '-mabi=32',
- 'cfg': ['--without-fp']},
+ 'ccopts': '-mabi=32'},
{'variant': 'n64-nan2008-soft',
- 'ccopts': '-mabi=64',
- 'cfg': ['--without-fp']}])
+ 'ccopts': '-mabi=64'}])
self.add_config(arch='nios2',
os_name='linux-gnu')
self.add_config(arch='powerpc',
@@ -314,8 +302,7 @@ class Context(object):
os_name='linux-gnu',
variant='soft',
gcc_cfg=['--disable-multilib', '--with-float=soft',
- '--enable-secureplt'],
- glibcs=[{'variant': 'soft', 'cfg': ['--without-fp']}])
+ '--enable-secureplt'])
self.add_config(arch='powerpc64',
os_name='linux-gnu',
gcc_cfg=['--disable-multilib', '--enable-secureplt'])
@@ -325,13 +312,11 @@ class Context(object):
self.add_config(arch='powerpc',
os_name='linux-gnuspe',
gcc_cfg=['--disable-multilib', '--enable-secureplt',
- '--enable-e500-double'],
- glibcs=[{'cfg': ['--without-fp']}])
+ '--enable-e500-double'])
self.add_config(arch='powerpc',
os_name='linux-gnuspe',
variant='e500v1',
- gcc_cfg=['--disable-multilib', '--enable-secureplt'],
- glibcs=[{'variant': 'e500v1', 'cfg': ['--without-fp']}])
+ gcc_cfg=['--disable-multilib', '--enable-secureplt'])
self.add_config(arch='s390x',
os_name='linux-gnu',
glibcs=[{},
@@ -347,13 +332,11 @@ class Context(object):
self.add_config(arch='sh4',
os_name='linux-gnu',
variant='soft',
- gcc_cfg=['--without-fp'],
- glibcs=[{'variant': 'soft', 'cfg': ['--without-fp']}])
+ gcc_cfg=['--without-fp'])
self.add_config(arch='sh4eb',
os_name='linux-gnu',
variant='soft',
- gcc_cfg=['--without-fp'],
- glibcs=[{'variant': 'soft', 'cfg': ['--without-fp']}])
+ gcc_cfg=['--without-fp'])
self.add_config(arch='sparc64',
os_name='linux-gnu',
glibcs=[{},
@@ -13,5 +13,9 @@ m68k) variant=`(echo "#ifdef __mcoldfire__"
echo >&2 "Cannot determine m68k processor variant"
exit 1
fi
- base_machine=m68k machine=m68k/$variant ;;
+ base_machine=m68k machine=m68k/$variant
+ if test "$variant" = "coldfire"; then
+ with_fp_cond="defined __mcffpu__"
+ fi
+ ;;
esac
@@ -25,5 +25,7 @@ mips*)
if test "$abiflag" != "_ABIO32" -a "$mips16flag" = "1"; then
as_fn_error $? "MIPS16 is only supported with the o32 ABI." "$LINENO" 5
fi
+
+ with_fp_cond="defined __mips_hard_float"
;;
esac
@@ -16,5 +16,6 @@ powerpc*)
base_machine=powerpc machine=powerpc/powerpc32
fi
rm -f conftest.i
+ with_fp_cond="!defined __NO_FPRS__"
;;
esac
@@ -1,6 +1,12 @@
# preconfigure fragment for sh.
case "$machine" in
-sh3*) base_machine=sh machine=sh/sh3 ;;
-sh4*) base_machine=sh machine=sh/sh4 ;;
+sh3*) base_machine=sh
+ machine=sh/sh3
+ with_fp_cond="defined __SH_FPU_ANY__"
+ ;;
+sh4*) base_machine=sh
+ machine=sh/sh4
+ with_fp_cond="defined __SH_FPU_ANY__"
+ ;;
esac