# Keep these sync'd with the list in Makefile.am. The first provides an
# expandable list at autoconf time; the second provides an expandable list
# (i.e., shell variable) at configure time.
- m4_define([glibcxx_SUBDIRS],[include libsupc++ src doc po testsuite])
+ m4_define([glibcxx_SUBDIRS],[include libsupc++ python src doc po testsuite])
SUBDIRS='glibcxx_SUBDIRS'
# These need to be absolute paths, yet at the same time need to
AC_HELP_STRING([--with-newlib],
[assume newlib as a system C library]))
- # We're almost certainly being configured before anything else which uses
- # C++, so all of our AC_PROG_* discoveries will be cached. It's vital that
- # we not cache the value of CXX that we "discover" here, because it's set
- # to something unique for us and libjava. Other target libraries need to
- # find CXX for themselves. We yank the rug out from under the normal AC_*
- # process by sneakily renaming the cache variable. This also lets us debug
- # the value of "our" CXX in postmortems.
- #
- # We must also force CXX to /not/ be a precious variable, otherwise the
- # wrong (non-multilib-adjusted) value will be used in multilibs. This
- # little trick also affects CPPFLAGS, CXXFLAGS, and LDFLAGS. And as a side
- # effect, CXXFLAGS is no longer automagically subst'd, so we have to do
- # that ourselves. Un-preciousing AC_PROG_CC also affects CC and CFLAGS.
- #
- # -fno-builtin must be present here so that a non-conflicting form of
- # std::exit can be guessed by AC_PROG_CXX, and used in later tests.
-
- m4_define([ac_cv_prog_CXX],[glibcxx_cv_prog_CXX])
- m4_rename([_AC_ARG_VAR_PRECIOUS],[glibcxx_PRECIOUS])
- m4_define([_AC_ARG_VAR_PRECIOUS],[])
- save_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS -fno-builtin"
- AC_PROG_CC
- AC_PROG_CXX
- CXXFLAGS="$save_CXXFLAGS"
- m4_rename([glibcxx_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
- AC_SUBST(CFLAGS)
- AC_SUBST(CXXFLAGS)
-
# Will set LN_S to either 'ln -s', 'ln', or 'cp -p' (if linking isn't
# available). Uncomment the next line to force a particular method.
AC_PROG_LN_S
dnl that are used should be checked.
dnl
dnl Note:
-dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD.
+dnl libgomp and libgfortran do this with a link test, instead of an asm test.
+dnl see: CHECK_SYNC_FETCH_AND_ADD
dnl
dnl Defines:
dnl _GLIBCXX_ATOMIC_BUILTINS_1
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
old_CXXFLAGS="$CXXFLAGS"
-
- # Do link tests if possible, instead asm tests.
- if test x$gcc_no_link != xyes; then
-
- # Can do link tests.
-
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
-
- AC_MSG_CHECKING([for atomic builtins for bool])
- AC_CACHE_VAL(glibcxx_cv_atomic_bool, [
- AC_TRY_LINK(
- [ ],
- [typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- const atomic_type c3(0);
- __sync_fetch_and_add(&c1, c2);
- __sync_val_compare_and_swap(&c1, c3, c2);
- __sync_lock_test_and_set(&c1, c3);
- __sync_lock_release(&c1);
- __sync_synchronize();],
- [glibcxx_cv_atomic_bool=yes],
- [glibcxx_cv_atomic_bool=no])
- ])
- if test $glibcxx_cv_atomic_bool = yes; then
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
- [Define if builtin atomic operations for bool are supported on this host.])
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_bool)
-
- AC_MSG_CHECKING([for atomic builtins for short])
- AC_CACHE_VAL(glibcxx_cv_atomic_short, [
- AC_TRY_LINK(
- [ ],
- [typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- const atomic_type c3(0);
- __sync_fetch_and_add(&c1, c2);
- __sync_val_compare_and_swap(&c1, c3, c2);
- __sync_lock_test_and_set(&c1, c3);
- __sync_lock_release(&c1);
- __sync_synchronize();],
- [glibcxx_cv_atomic_short=yes],
- [glibcxx_cv_atomic_short=no])
- ])
- if test $glibcxx_cv_atomic_short = yes; then
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
- [Define if builtin atomic operations for short are supported on this host.])
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_short)
-
- AC_MSG_CHECKING([for atomic builtins for int])
- AC_CACHE_VAL(glibcxx_cv_atomic_int, [
- AC_TRY_LINK(
- [ ],
- [typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- const atomic_type c3(0);
- __sync_fetch_and_add(&c1, c2);
- __sync_val_compare_and_swap(&c1, c3, c2);
- __sync_lock_test_and_set(&c1, c3);
- __sync_lock_release(&c1);
- __sync_synchronize();],
- [glibcxx_cv_atomic_int=yes],
- [glibcxx_cv_atomic_int=no])
- ])
- if test $glibcxx_cv_atomic_int = yes; then
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
- [Define if builtin atomic operations for int are supported on this host.])
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_int)
-
- AC_MSG_CHECKING([for atomic builtins for long long])
- AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [
- AC_TRY_LINK(
- [ ],
- [typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- const atomic_type c3(0);
- __sync_fetch_and_add(&c1, c2);
- __sync_val_compare_and_swap(&c1, c3, c2);
- __sync_lock_test_and_set(&c1, c3);
- __sync_lock_release(&c1);
- __sync_synchronize();],
- [glibcxx_cv_atomic_long_long=yes],
- [glibcxx_cv_atomic_long_long=no])
- ])
- if test $glibcxx_cv_atomic_long_long = yes; then
- AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
- [Define if builtin atomic operations for long long are supported on this host.])
- fi
- AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
-
- else
-
- # Do asm tests.
-
+
# Compile unoptimized.
CXXFLAGS='-O0 -S'
- # Fake what AC_TRY_COMPILE does.
+ # Fake what AC_TRY_COMPILE does, without linking as this is
+ # unnecessary for a builtins test.
cat > conftest.$ac_ext << EOF
[#]line __oline__ "configure"
AC_MSG_CHECKING([for atomic builtins for bool])
if AC_TRY_EVAL(ac_compile); then
if grep __sync_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_bool=no
+ enable_atomic_builtinsb=no
else
AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1,
[Define if builtin atomic operations for bool are supported on this host.])
- glibcxx_cv_atomic_bool=yes
+ enable_atomic_builtinsb=yes
fi
fi
- AC_MSG_RESULT($glibcxx_cv_atomic_bool)
+ AC_MSG_RESULT($enable_atomic_builtinsb)
rm -f conftest*
cat > conftest.$ac_ext << EOF
AC_MSG_CHECKING([for atomic builtins for short])
if AC_TRY_EVAL(ac_compile); then
if grep __sync_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_short=no
+ enable_atomic_builtinss=no
else
AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1,
[Define if builtin atomic operations for short are supported on this host.])
- glibcxx_cv_atomic_short=yes
+ enable_atomic_builtinss=yes
fi
fi
- AC_MSG_RESULT($glibcxx_cv_atomic_short)
+ AC_MSG_RESULT($enable_atomic_builtinss)
rm -f conftest*
cat > conftest.$ac_ext << EOF
AC_MSG_CHECKING([for atomic builtins for int])
if AC_TRY_EVAL(ac_compile); then
if grep __sync_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_int=no
+ enable_atomic_builtinsi=no
else
AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1,
[Define if builtin atomic operations for int are supported on this host.])
- glibcxx_cv_atomic_int=yes
+ enable_atomic_builtinsi=yes
fi
fi
- AC_MSG_RESULT($glibcxx_cv_atomic_int)
+ AC_MSG_RESULT($enable_atomic_builtinsi)
rm -f conftest*
cat > conftest.$ac_ext << EOF
AC_MSG_CHECKING([for atomic builtins for long long])
if AC_TRY_EVAL(ac_compile); then
if grep __sync_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_long_long=no
+ enable_atomic_builtinsll=no
else
AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1,
[Define if builtin atomic operations for long long are supported on this host.])
- glibcxx_cv_atomic_long_long=yes
+ enable_atomic_builtinsll=yes
fi
fi
- AC_MSG_RESULT($glibcxx_cv_atomic_long_long)
+ AC_MSG_RESULT($enable_atomic_builtinsll)
rm -f conftest*
- fi
CXXFLAGS="$old_CXXFLAGS"
AC_LANG_RESTORE
# Set atomicity_dir to builtins if either of above tests pass.
- if test $glibcxx_cv_atomic_int = yes || test $glibcxx_cv_atomic_bool = yes ; then
+ if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then
atomicity_dir=cpu/generic/atomicity_builtins
fi
OSDN Git Service
