mirror of
https://github.com/gnustep/libs-base.git
synced 2025-05-10 08:10:49 +00:00
Attempt to detect the flags needed to enable compiler intrinsics for atomic
operations. git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@33134 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Niels Grewe
parent
61c20dcf92
commit
410ab087fa
5 changed files with 218 additions and 12 deletions
10
ChangeLog
10
ChangeLog
|
|
@ -1,3 +1,13 @@
|
|||
2011-05-26 Niels Grewe <niels.grewe@halbordnung.de>
|
||||
|
||||
* configure.ac: Add test to check for availability of atomic builtins.
|
||||
* configure: Regenerate.
|
||||
* Headers/GNUstepBase/config.h.in: Regenerate.
|
||||
* Source/NSObject.m: Fix typo.
|
||||
|
||||
Attempt to set the compiler and linker flags needed to enable compiler
|
||||
intrinsics for atomic operations on platforms where those are available.
|
||||
|
||||
2011-05-26 18:29 David Chisnall <theraven@gna.org>
|
||||
|
||||
* Source/simple-load.h:
|
||||
|
|
|
|||
|
|
@ -699,6 +699,9 @@
|
|||
/* Define to the one symbol short name of this package. */
|
||||
#undef PACKAGE_TARNAME
|
||||
|
||||
/* Define to the home page for this package. */
|
||||
#undef PACKAGE_URL
|
||||
|
||||
/* Define to the version of this package. */
|
||||
#undef PACKAGE_VERSION
|
||||
|
||||
|
|
@ -738,6 +741,9 @@
|
|||
/* Define to 1 if you have the ANSI C header files. */
|
||||
#undef STDC_HEADERS
|
||||
|
||||
/* Define if the compiler provides builtins for atomic operations */
|
||||
#undef USE_ATOMIC_BUILTINS
|
||||
|
||||
/* Define if using the ffcall library for invocations */
|
||||
#undef USE_FFCALL
|
||||
|
||||
|
|
|
|||
|
|
@ -209,7 +209,7 @@ typedef int32_t volatile *gsatomic_t;
|
|||
#define GSAtomicDecrement(X) InterlockedDecrement((LONG volatile*)X)
|
||||
|
||||
|
||||
#elif defined(__llvm__) || (defined(USE_ATOMIC_BUILDINS) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
|
||||
#elif defined(__llvm__) || (defined(USE_ATOMIC_BUILTINS) && (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)))
|
||||
/* Use the GCC atomic operations with recent GCC versions */
|
||||
|
||||
typedef int32_t volatile *gsatomic_t;
|
||||
|
|
|
|||
126
configure
vendored
126
configure
vendored
|
|
@ -5063,6 +5063,132 @@ $as_echo "$ac_cv_safe_to_define___extensions__" >&6; }
|
|||
|
||||
|
||||
|
||||
|
||||
#--------------------------------------------------------------------
|
||||
# Check how to enable builtins for atomic operations
|
||||
#--------------------------------------------------------------------
|
||||
|
||||
ac_ext=c
|
||||
ac_cpp='$CPP $CPPFLAGS'
|
||||
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
|
||||
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
|
||||
ac_compiler_gnu=$ac_cv_c_compiler_gnu
|
||||
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports atomic operations" >&5
|
||||
$as_echo_n "checking whether the compiler supports atomic operations... " >&6; };
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
typedef int atomic;
|
||||
int
|
||||
main ()
|
||||
{
|
||||
atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_compile "$LINENO"; then :
|
||||
have_atomic=yes
|
||||
else
|
||||
have_atomic=no
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext;
|
||||
if test "$have_atomic" = "yes"; then
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
|
||||
$as_echo "yes" >&6; };
|
||||
|
||||
$as_echo "#define USE_ATOMIC_BUILTINS 1" >>confdefs.h
|
||||
|
||||
else
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; };
|
||||
fi
|
||||
if test "$CC" = "gcc"; then
|
||||
saved_CFLAGS="$CFLAGS";
|
||||
ATOMIC_CFLAGS="";
|
||||
|
||||
# FIXME: Forcing -march=i568 for any i568 or later CPU is a stop gap measure
|
||||
# to make the compiler emit native assembly for atomic operations on i586 or
|
||||
# latter processors (GCC by defaults emits code compatible with the original
|
||||
# i386 and requires library functions to emulate atomic operations). When
|
||||
# gnustep-make takes care of this kind of target setting, the check can safely
|
||||
# be removed.
|
||||
case "$target_cpu" in
|
||||
i586*|i686*|i786*)
|
||||
ATOMIC_CFLAGS="-march=i586";
|
||||
CFLAGS="$saved_CFLAGS $ATOMIC_CFLAGS";
|
||||
esac
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking checking whether atomic operations require an external library" >&5
|
||||
$as_echo_n "checking checking whether atomic operations require an external library... " >&6; };
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
typedef int atomic;
|
||||
int
|
||||
main ()
|
||||
{
|
||||
atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
need_linkage=no
|
||||
else
|
||||
need_linkage=yes
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext;
|
||||
|
||||
if test "$need_linkage" = "no"; then
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; };
|
||||
else
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
|
||||
$as_echo "yes" >&6; };
|
||||
saved_LDFLAGS="$LDFLAGS";
|
||||
LDFLAGS="$saved_LDFLAGS -lgcc";
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking checking for atomic operations from libgcc" >&5
|
||||
$as_echo_n "checking checking for atomic operations from libgcc... " >&6; };
|
||||
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
||||
/* end confdefs.h. */
|
||||
typedef int atomic;
|
||||
int
|
||||
main ()
|
||||
{
|
||||
atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);
|
||||
;
|
||||
return 0;
|
||||
}
|
||||
_ACEOF
|
||||
if ac_fn_c_try_link "$LINENO"; then :
|
||||
atomic_in_libgcc=yes
|
||||
else
|
||||
atomic_in_libgcc=no
|
||||
fi
|
||||
rm -f core conftest.err conftest.$ac_objext \
|
||||
conftest$ac_exeext conftest.$ac_ext;
|
||||
if test "$atomic_in_libgcc" = "yes"; then
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
|
||||
$as_echo "yes" >&6; };
|
||||
LIBS="$LIBS -lgcc";
|
||||
|
||||
$as_echo "#define USE_ATOMIC_BUILTINS 1" >>confdefs.h
|
||||
|
||||
else
|
||||
LDFLAGS="$saved_LDFLAGS";
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
|
||||
$as_echo "no" >&6; };
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
ac_ext=c
|
||||
ac_cpp='$CPP $CPPFLAGS'
|
||||
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
|
||||
ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
|
||||
ac_compiler_gnu=$ac_cv_c_compiler_gnu
|
||||
|
||||
|
||||
|
||||
# Extract the first word of "whoami", so it can be a program name with args.
|
||||
set dummy whoami; ac_word=$2
|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
|
||||
|
|
|
|||
64
configure.ac
64
configure.ac
|
|
@ -1006,6 +1006,70 @@ AC_PROG_CC
|
|||
AC_PROG_CPP
|
||||
AC_USE_SYSTEM_EXTENSIONS
|
||||
|
||||
|
||||
#--------------------------------------------------------------------
|
||||
# Check how to enable builtins for atomic operations
|
||||
#--------------------------------------------------------------------
|
||||
|
||||
AC_LANG_PUSH(C)
|
||||
AC_MSG_CHECKING([whether the compiler supports atomic operations]);
|
||||
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[typedef int atomic;]],
|
||||
[[atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);]])],
|
||||
have_atomic=yes,
|
||||
have_atomic=no);
|
||||
if test "$have_atomic" = "yes"; then
|
||||
AC_MSG_RESULT([yes]);
|
||||
AC_DEFINE(USE_ATOMIC_BUILTINS,1,
|
||||
[Define if the compiler provides builtins for atomic operations])
|
||||
else
|
||||
AC_MSG_RESULT([no]);
|
||||
fi
|
||||
if test "$CC" = "gcc"; then
|
||||
saved_CFLAGS="$CFLAGS";
|
||||
ATOMIC_CFLAGS="";
|
||||
|
||||
# FIXME: Forcing -march=i568 for any i568 or later CPU is a stop gap measure
|
||||
# to make the compiler emit native assembly for atomic operations on i586 or
|
||||
# latter processors (GCC by defaults emits code compatible with the original
|
||||
# i386 and requires library functions to emulate atomic operations). When
|
||||
# gnustep-make takes care of this kind of target setting, the check can safely
|
||||
# be removed.
|
||||
case "$target_cpu" in
|
||||
i586*|i686*|i786*)
|
||||
ATOMIC_CFLAGS="-march=i586";
|
||||
CFLAGS="$saved_CFLAGS $ATOMIC_CFLAGS";
|
||||
esac
|
||||
AC_MSG_CHECKING([checking whether atomic operations require an external library]);
|
||||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[typedef int atomic;]],
|
||||
[[atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);]])],
|
||||
need_linkage=no,
|
||||
need_linkage=yes);
|
||||
|
||||
if test "$need_linkage" = "no"; then
|
||||
AC_MSG_RESULT([no]);
|
||||
else
|
||||
AC_MSG_RESULT([yes]);
|
||||
saved_LDFLAGS="$LDFLAGS";
|
||||
LDFLAGS="$saved_LDFLAGS -lgcc";
|
||||
AC_MSG_CHECKING([checking for atomic operations from libgcc]);
|
||||
AC_LINK_IFELSE([AC_LANG_PROGRAM([[typedef int atomic;]],
|
||||
[[atomic x; atomic y; __sync_bool_compare_and_swap(&x, y, y + 1);]])],
|
||||
atomic_in_libgcc=yes,
|
||||
atomic_in_libgcc=no);
|
||||
if test "$atomic_in_libgcc" = "yes"; then
|
||||
AC_MSG_RESULT([yes]);
|
||||
LIBS="$LIBS -lgcc";
|
||||
AC_DEFINE(USE_ATOMIC_BUILTINS,1,
|
||||
[Define if the compiler provides builtins for atomic operations])
|
||||
else
|
||||
LDFLAGS="$saved_LDFLAGS";
|
||||
AC_MSG_RESULT([no]);
|
||||
fi
|
||||
fi
|
||||
fi
|
||||
AC_LANG_POP(C)
|
||||
|
||||
|
||||
AC_PATH_PROG(WHOAMI, whoami, echo, $PATH:/usr/ucb)
|
||||
|
||||
#--------------------------------------------------------------------
|
||||
|
|
|
|||
Loading…
Reference in a new issue