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merge r2127 from trunk

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git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/prepare-0.9.10@2170 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2008-03-27 23:37:23 +00:00
parent daaf70bb3a
commit 46cd2253ab
2 changed files with 324 additions and 7 deletions
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100
configure.ac
View file

@ -125,6 +125,43 @@ if test "x$GCC" = "xyes" ; then
done
fi
# Native atomic operation support
AC_ARG_ENABLE([atomic-arm-linux-helpers],
AC_HELP_STRING([--disable-atomic-arm-linux-helpers], [use inline asm or libatomic_ops instead]),
[
case "${enableval}" in
yes) atomic_arm_linux_helpers=yes ;;
no) atomic_arm_linux_helpers=no ;;
*) AC_MSG_ERROR(bad value ${enableval} for --disable-atomic-arm-linux-helpers) ;;
esac
],
[atomic_arm_linux_helpers=auto])
AC_ARG_ENABLE([atomic-arm-memory-barrier],
AC_HELP_STRING([--enable-atomic-arm-memory-barrier], [only really needed in SMP arm systems]),
[
case "${enableval}" in
yes) AC_DEFINE_UNQUOTED(ATOMIC_ARM_MEMORY_BARRIER_ENABLED, 1, [Enable memory barriers]) ;;
no) ;;
*) AC_MSG_ERROR(bad value ${enableval} for --disable-atomic-arm-linux-helpers) ;;
esac
],)
AC_MSG_CHECKING([target operating system])
case $host in
*-*-linux*)
AC_MSG_RESULT([linux])
pulse_target_os=linux
;;
*)
AC_MSG_RESULT([unknown])
pulse_target_os=unknown
;;
esac
# If everything else fails use libatomic_ops
need_libatomic_ops=yes
AC_MSG_CHECKING([whether $CC knows __sync_bool_compare_and_swap()])
AC_LANG_CONFTEST([int main() { int a = 4; __sync_bool_compare_and_swap(&a, 4, 5); }])
$CC conftest.c $CFLAGS -o conftest > /dev/null 2> /dev/null
@ -133,8 +170,53 @@ rm -f conftest.o conftest
if test $ret -eq 0 ; then
AC_DEFINE([HAVE_ATOMIC_BUILTINS], 1, [Have __sync_bool_compare_and_swap() and friends.])
AC_MSG_RESULT([yes])
need_libatomic_ops=no
else
AC_MSG_RESULT([no])
# HW specific atomic ops stuff
AC_MSG_CHECKING([architecture for native atomic operations])
case $host_cpu in
arm*)
AC_MSG_RESULT([arm])
AC_MSG_CHECKING([whether we can use Linux kernel helpers])
# The Linux kernel helper functions have been there since 2.6.16. However
# compile time checking for kernel version in cross compile environment
# (which is usually the case for arm cpu) is tricky (or impossible).
if test "x$pulse_target_os" = "xlinux" && test "x$atomic_arm_linux_helpers" != "xno"; then
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(ATOMIC_ARM_LINUX_HELPERS, 1, [special arm linux implementation])
need_libatomic_ops=no
else
AC_MSG_RESULT([no])
AC_MSG_CHECKING([compiler support for arm inline asm atomic operations])
AC_LANG_CONFTEST([[int main()
{
volatile int a=0;
int o=0, n=1, r;
asm volatile ("ldrex %0, [%1]\n"
"subs %0, %0, %2\n"
"strexeq %0, %3, [%1]\n"
: "=&r" (r)
: "r" (&a), "Ir" (o), "r" (n)
: "cc");
return (a==1 ? 0 : -1);
}]])
$CC conftest.c $CFLAGS -o conftest > /dev/null 2>&1
ret=$?
rm -f conftest.o conftest
if test $ret -eq 0 ; then
AC_DEFINE([ATOMIC_ARM_INLINE_ASM], 1, [Have ARMv6 instructions.])
AC_MSG_RESULT([yes])
need_libatomic_ops=no
else
AC_MSG_RESULT([no])
fi
fi
;;
*)
AC_MSG_RESULT([unknown])
;;
esac
fi
AC_MSG_CHECKING([whether $CC knows __thread])
@ -412,13 +494,19 @@ AC_SUBST(LIBSNDFILE_LIBS)
#### atomic-ops ###
AC_CHECK_HEADERS([atomic_ops.h], [], [
AC_MSG_ERROR([*** libatomic-ops headers not found])
])
AC_MSG_CHECKING([whether we need libatomic_ops])
if test "x$need_libatomic_ops" = "xyes"; then
AC_MSG_RESULT([yes])
AC_CHECK_HEADERS([atomic_ops.h], [], [
AC_MSG_ERROR([*** libatomic-ops headers not found])
])
# Win32 does not need the lib and breaks horribly if we try to include it
if test "x$os_is_win32" != "x1" ; then
LIBS="$LIBS -latomic_ops"
# Win32 does not need the lib and breaks horribly if we try to include it
if test "x$os_is_win32" != "x1" ; then
LIBS="$LIBS -latomic_ops"
fi
else
AC_MSG_RESULT([no])
fi
#### Libsamplerate support (optional) ####