PTHREAD_CC=$CC
fi
- # The next part tries to detect GCC inconsistency with -shared on some
- # architectures and systems. The problem is that in certain
- # configurations, when -shared is specified, GCC "forgets" to
- # internally use various flags which are still necessary.
+ # The next part tries to detect GCC inconsistency with -shared on some
+ # architectures and systems. The problem is that in certain
+ # configurations, when -shared is specified, GCC "forgets" to
+ # internally use various flags which are still necessary.
- { echo "$as_me:$LINENO: checking whether to check for GCC pthread/shared inconsistencies" >&5
+ #
+ # Prepare the flags
+ #
+ save_CFLAGS="$CFLAGS"
+ save_LIBS="$LIBS"
+ save_CC="$CC"
+
+ # Try with the flags determined by the earlier checks.
+ #
+ # -Wl,-z,defs forces link-time symbol resolution, so that the
+ # linking checks with -shared actually have any value
+ #
+ # FIXME: -fPIC is required for -shared on many architectures,
+ # so we specify it here, but the right way would probably be to
+ # properly detect whether it is actually required.
+ CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+ CC="$PTHREAD_CC"
+
+ # In order not to create several levels of indentation, we test
+ # the value of "$done" until we find the cure or run out of ideas.
+ done="no"
+
+ # First, make sure the CFLAGS we added are actually accepted by our
+ # compiler. If not (and OS X's ld, for instance, does not accept -z),
+ # then we can't do this test.
+ if test x"$done" = xno; then
+ { echo "$as_me:$LINENO: checking whether to check for GCC pthread/shared inconsistencies" >&5
echo $ECHO_N "checking whether to check for GCC pthread/shared inconsistencies... $ECHO_C" >&6; }
- check_inconsistencies=yes
- case "${host_cpu}-${host_os}" in
- *-darwin*) check_inconsistencies=no ;;
- esac
- if test x"$GCC" != xyes -o "x$check_inconsistencies" != xyes ; then
- { echo "$as_me:$LINENO: result: no" >&5
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (ac_try="$ac_link"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_link") 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } && {
+ test -z "$ac_c_werror_flag" ||
+ test ! -s conftest.err
+ } && test -s conftest$ac_exeext &&
+ $as_test_x conftest$ac_exeext; then
+ :
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ done=yes
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+ conftest$ac_exeext conftest.$ac_ext
+
+ if test "x$done" = xyes ; then
+ { echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6; }
- else
- { echo "$as_me:$LINENO: result: yes" >&5
+ else
+ { echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6; }
+ fi
+ fi
- # In order not to create several levels of indentation, we test
- # the value of "$ok" until we find out the cure or run out of
- # ideas.
- ok="no"
-
- #
- # Prepare the flags
- #
- save_CFLAGS="$CFLAGS"
- save_LIBS="$LIBS"
- save_CC="$CC"
- # Try with the flags determined by the earlier checks.
- #
- # -Wl,-z,defs forces link-time symbol resolution, so that the
- # linking checks with -shared actually have any value
- #
- # FIXME: -fPIC is required for -shared on many architectures,
- # so we specify it here, but the right way would probably be to
- # properly detect whether it is actually required.
- CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS"
- LIBS="$PTHREAD_LIBS $LIBS"
- CC="$PTHREAD_CC"
-
- { echo "$as_me:$LINENO: checking whether -pthread is sufficient with -shared" >&5
+ if test x"$done" = xno; then
+ { echo "$as_me:$LINENO: checking whether -pthread is sufficient with -shared" >&5
echo $ECHO_N "checking whether -pthread is sufficient with -shared... $ECHO_C" >&6; }
- cat >conftest.$ac_ext <<_ACEOF
+ cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
main ()
{
pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0);
;
return 0;
}
test ! -s conftest.err
} && test -s conftest$ac_exeext &&
$as_test_x conftest$ac_exeext; then
- ok=yes
+ done=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext
- if test "x$ok" = xyes; then
- { echo "$as_me:$LINENO: result: yes" >&5
+ if test "x$done" = xyes; then
+ { echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6; }
- else
- { echo "$as_me:$LINENO: result: no" >&5
+ else
+ { echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6; }
- fi
+ fi
+ fi
- #
- # Linux gcc on some architectures such as mips/mipsel forgets
- # about -lpthread
- #
- if test x"$ok" = xno; then
- { echo "$as_me:$LINENO: checking whether -lpthread fixes that" >&5
+ #
+ # Linux gcc on some architectures such as mips/mipsel forgets
+ # about -lpthread
+ #
+ if test x"$done" = xno; then
+ { echo "$as_me:$LINENO: checking whether -lpthread fixes that" >&5
echo $ECHO_N "checking whether -lpthread fixes that... $ECHO_C" >&6; }
- LIBS="-lpthread $PTHREAD_LIBS $save_LIBS"
- cat >conftest.$ac_ext <<_ACEOF
+ LIBS="-lpthread $PTHREAD_LIBS $save_LIBS"
+ cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
main ()
{
pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0);
;
return 0;
}
test ! -s conftest.err
} && test -s conftest$ac_exeext &&
$as_test_x conftest$ac_exeext; then
- ok=yes
+ done=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext
- if test "x$ok" = xyes; then
- { echo "$as_me:$LINENO: result: yes" >&5
+ if test "x$done" = xyes; then
+ { echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6; }
- PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
- else
- { echo "$as_me:$LINENO: result: no" >&5
+ PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
+ else
+ { echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6; }
- fi
- fi
- #
- # FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc
- #
- if test x"$ok" = xno; then
- { echo "$as_me:$LINENO: checking whether -lc_r fixes that" >&5
+ fi
+ fi
+ #
+ # FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc
+ #
+ if test x"$done" = xno; then
+ { echo "$as_me:$LINENO: checking whether -lc_r fixes that" >&5
echo $ECHO_N "checking whether -lc_r fixes that... $ECHO_C" >&6; }
- LIBS="-lc_r $PTHREAD_LIBS $save_LIBS"
- cat >conftest.$ac_ext <<_ACEOF
+ LIBS="-lc_r $PTHREAD_LIBS $save_LIBS"
+ cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
main ()
{
pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0);
;
return 0;
}
test ! -s conftest.err
} && test -s conftest$ac_exeext &&
$as_test_x conftest$ac_exeext; then
- ok=yes
+ done=yes
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext
- if test "x$ok" = xyes; then
- { echo "$as_me:$LINENO: result: yes" >&5
+ if test "x$done" = xyes; then
+ { echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6; }
- PTHREAD_LIBS="-lc_r $PTHREAD_LIBS"
- else
- { echo "$as_me:$LINENO: result: no" >&5
+ PTHREAD_LIBS="-lc_r $PTHREAD_LIBS"
+ else
+ { echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6; }
- fi
- fi
- if test x"$ok" = xno; then
- # OK, we have run out of ideas
- { echo "$as_me:$LINENO: WARNING: Impossible to determine how to use pthreads with shared libraries" >&5
+ fi
+ fi
+ if test x"$done" = xno; then
+ # OK, we have run out of ideas
+ { echo "$as_me:$LINENO: WARNING: Impossible to determine how to use pthreads with shared libraries" >&5
echo "$as_me: WARNING: Impossible to determine how to use pthreads with shared libraries" >&2;}
- # so it's not safe to assume that we may use pthreads
- acx_pthread_ok=no
- fi
+ # so it's not safe to assume that we may use pthreads
+ acx_pthread_ok=no
+ fi
- CFLAGS="$save_CFLAGS"
- LIBS="$save_LIBS"
- CC="$save_CC"
- fi
+ CFLAGS="$save_CFLAGS"
+ LIBS="$save_LIBS"
+ CC="$save_CC"
else
PTHREAD_CC="$CC"
fi
fi
-# We want to access the "PC" (Program Counter) register from a struct
-# ucontext. Every system has its own way of doing that. We try all the
-# possibilities we know about. Note REG_PC should come first (REG_RIP
-# is also defined on solaris, but does the wrong thing).
{ echo "$as_me:$LINENO: checking how to access the program counter from a struct ucontext" >&5
echo $ECHO_N "checking how to access the program counter from a struct ucontext... $ECHO_C" >&6; }
-pc_fields=" uc_mcontext.gregs[REG_PC]" # Solaris x86 (32 + 64 bit)
-pc_fields="$pc_fields uc_mcontext.gregs[REG_EIP]" # Linux (i386)
-pc_fields="$pc_fields uc_mcontext.gregs[REG_RIP]" # Linux (x86_64)
-pc_fields="$pc_fields uc_mcontext.sc_ip" # Linux (ia64)
-pc_fields="$pc_fields uc_mcontext.uc_regs->gregs[PT_NIP]" # Linux (ppc)
-pc_fields="$pc_fields uc_mcontext.gregs[R15]" # Linux (arm old [untested])
-pc_fields="$pc_fields uc_mcontext.arm_pc" # Linux (arm new [untested])
-pc_fields="$pc_fields uc_mcontext.mc_eip" # FreeBSD (i386)
-pc_fields="$pc_fields uc_mcontext.mc_rip" # FreeBSD (x86_64 [untested])
-pc_fields="$pc_fields uc_mcontext->ss.eip" # OS X (i386, <=10.4)
-pc_fields="$pc_fields uc_mcontext->__ss.__eip" # OS X (i386, >=10.5)
-pc_fields="$pc_fields uc_mcontext->ss.rip" # OS X (x86_64)
-pc_fields="$pc_fields uc_mcontext->__ss.__rip" # OS X (>=10.5 [untested])
-pc_fields="$pc_fields uc_mcontext->ss.srr0" # OS X (ppc, ppc64 [untested])
-pc_fields="$pc_fields uc_mcontext->__ss.__srr0" # OS X (>=10.5 [untested])
-pc_field_found=false
-for pc_field in $pc_fields; do
- if ! $pc_field_found; then
- cat >conftest.$ac_ext <<_ACEOF
+ pc_fields=" uc_mcontext.gregs[REG_PC]" # Solaris x86 (32 + 64 bit)
+ pc_fields="$pc_fields uc_mcontext.gregs[REG_EIP]" # Linux (i386)
+ pc_fields="$pc_fields uc_mcontext.gregs[REG_RIP]" # Linux (x86_64)
+ pc_fields="$pc_fields uc_mcontext.sc_ip" # Linux (ia64)
+ pc_fields="$pc_fields uc_mcontext.uc_regs->gregs[PT_NIP]" # Linux (ppc)
+ pc_fields="$pc_fields uc_mcontext.gregs[R15]" # Linux (arm old [untested])
+ pc_fields="$pc_fields uc_mcontext.arm_pc" # Linux (arm new [untested])
+ pc_fields="$pc_fields uc_mcontext.mc_eip" # FreeBSD (i386)
+ pc_fields="$pc_fields uc_mcontext.mc_rip" # FreeBSD (x86_64 [untested])
+ pc_fields="$pc_fields uc_mcontext.__gregs[_REG_EIP]" # NetBSD (i386)
+ pc_fields="$pc_fields uc_mcontext.__gregs[_REG_RIP]" # NetBSD (x86_64)
+ pc_fields="$pc_fields uc_mcontext->ss.eip" # OS X (i386, <=10.4)
+ pc_fields="$pc_fields uc_mcontext->__ss.__eip" # OS X (i386, >=10.5)
+ pc_fields="$pc_fields uc_mcontext->ss.rip" # OS X (x86_64)
+ pc_fields="$pc_fields uc_mcontext->__ss.__rip" # OS X (>=10.5 [untested])
+ pc_fields="$pc_fields uc_mcontext->ss.srr0" # OS X (ppc, ppc64 [untested])
+ pc_fields="$pc_fields uc_mcontext->__ss.__srr0" # OS X (>=10.5 [untested])
+ pc_field_found=false
+ for pc_field in $pc_fields; do
+ if ! $pc_field_found; then
+ cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#define _GNU_SOURCE 1
- #include <ucontext.h>
+ #include <ucontext.h>
int
main ()
{
#define PC_FROM_UCONTEXT $pc_field
_ACEOF
- { echo "$as_me:$LINENO: result: $pc_field" >&5
+ { echo "$as_me:$LINENO: result: $pc_field" >&5
echo "${ECHO_T}$pc_field" >&6; }
- pc_field_found=true
+ pc_field_found=true
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
- fi
-done
-if ! $pc_field_found; then
- { echo "$as_me:$LINENO: WARNING: Could not find the PC. Will not output failed addresses..." >&5
-echo "$as_me: WARNING: Could not find the PC. Will not output failed addresses..." >&2;}
+ fi
+ done
+ if ! $pc_field_found; then
+ pc_fields=" sc_eip" # OpenBSD (i386)
+ pc_fields="$pc_fields sc_rip" # OpenBSD (x86_64)
+ for pc_field in $pc_fields; do
+ if ! $pc_field_found; then
+ cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+#include <signal.h>
+int
+main ()
+{
+ucontext_t u; return u.$pc_field == 0;
+ ;
+ return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+ *) ac_try_echo=$ac_try;;
+esac
+eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
+ (eval "$ac_compile") 2>conftest.er1
+ ac_status=$?
+ grep -v '^ *+' conftest.er1 >conftest.err
+ rm -f conftest.er1
+ cat conftest.err >&5
+ echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); } && {
+ test -z "$ac_c_werror_flag" ||
+ test ! -s conftest.err
+ } && test -s conftest.$ac_objext; then
+
+cat >>confdefs.h <<_ACEOF
+#define PC_FROM_UCONTEXT $pc_field
+_ACEOF
+
+ { echo "$as_me:$LINENO: result: $pc_field" >&5
+echo "${ECHO_T}$pc_field" >&6; }
+ pc_field_found=true
+else
+ echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+
fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+ fi
+ done
+ fi
+ if ! $pc_field_found; then
+ { echo "$as_me:$LINENO: WARNING: Could not find the PC. Will not output failed addresses..." >&5
+echo "$as_me: WARNING: Could not find the PC. Will not output failed addresses..." >&2;}
+ fi
+
# These are what's needed by logging.h.in and raw_logging.h.in
# This was retrieved from
-# http://0pointer.de/cgi-bin/viewcvs.cgi/trunk/common/acx_pthread.m4?rev=1227
+# http://svn.0pointer.de/viewvc/trunk/common/acx_pthread.m4?revision=1277&root=avahi
# See also (perhaps for new versions?)
-# http://0pointer.de/cgi-bin/viewcvs.cgi/trunk/common/acx_pthread.m4
+# http://svn.0pointer.de/viewvc/trunk/common/acx_pthread.m4?root=avahi
+#
+# We've rewritten the inconsistency check code (from avahi), to work
+# more broadly. In particular, it no longer assumes ld accepts -zdefs.
+# This caused a restructing of the code, but the functionality has only
+# changed a little.
dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
dnl
PTHREAD_CC=$CC
fi
- # The next part tries to detect GCC inconsistency with -shared on some
- # architectures and systems. The problem is that in certain
- # configurations, when -shared is specified, GCC "forgets" to
- # internally use various flags which are still necessary.
-
- AC_MSG_CHECKING([whether to check for GCC pthread/shared inconsistencies])
- check_inconsistencies=yes
- case "${host_cpu}-${host_os}" in
- *-darwin*) check_inconsistencies=no ;;
- esac
- if test x"$GCC" != xyes -o "x$check_inconsistencies" != xyes ; then
- AC_MSG_RESULT([no])
- else
- AC_MSG_RESULT([yes])
-
- # In order not to create several levels of indentation, we test
- # the value of "$ok" until we find out the cure or run out of
- # ideas.
- ok="no"
-
- #
- # Prepare the flags
- #
- save_CFLAGS="$CFLAGS"
- save_LIBS="$LIBS"
- save_CC="$CC"
- # Try with the flags determined by the earlier checks.
- #
- # -Wl,-z,defs forces link-time symbol resolution, so that the
- # linking checks with -shared actually have any value
- #
- # FIXME: -fPIC is required for -shared on many architectures,
- # so we specify it here, but the right way would probably be to
- # properly detect whether it is actually required.
- CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS"
- LIBS="$PTHREAD_LIBS $LIBS"
- CC="$PTHREAD_CC"
-
- AC_MSG_CHECKING([whether -pthread is sufficient with -shared])
- AC_TRY_LINK([#include <pthread.h>],
- [pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
- [ok=yes])
-
- if test "x$ok" = xyes; then
- AC_MSG_RESULT([yes])
- else
- AC_MSG_RESULT([no])
- fi
-
- #
- # Linux gcc on some architectures such as mips/mipsel forgets
- # about -lpthread
- #
- if test x"$ok" = xno; then
- AC_MSG_CHECKING([whether -lpthread fixes that])
- LIBS="-lpthread $PTHREAD_LIBS $save_LIBS"
- AC_TRY_LINK([#include <pthread.h>],
- [pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
- [ok=yes])
-
- if test "x$ok" = xyes; then
- AC_MSG_RESULT([yes])
- PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
- else
- AC_MSG_RESULT([no])
- fi
- fi
- #
- # FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc
- #
- if test x"$ok" = xno; then
- AC_MSG_CHECKING([whether -lc_r fixes that])
- LIBS="-lc_r $PTHREAD_LIBS $save_LIBS"
- AC_TRY_LINK([#include <pthread.h>],
- [pthread_t th; pthread_join(th, 0);
- pthread_attr_init(0); pthread_cleanup_push(0, 0);
- pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
- [ok=yes])
-
- if test "x$ok" = xyes; then
- AC_MSG_RESULT([yes])
- PTHREAD_LIBS="-lc_r $PTHREAD_LIBS"
- else
- AC_MSG_RESULT([no])
- fi
- fi
- if test x"$ok" = xno; then
- # OK, we have run out of ideas
- AC_MSG_WARN([Impossible to determine how to use pthreads with shared libraries])
-
- # so it's not safe to assume that we may use pthreads
- acx_pthread_ok=no
- fi
-
- CFLAGS="$save_CFLAGS"
- LIBS="$save_LIBS"
- CC="$save_CC"
- fi
+ # The next part tries to detect GCC inconsistency with -shared on some
+ # architectures and systems. The problem is that in certain
+ # configurations, when -shared is specified, GCC "forgets" to
+ # internally use various flags which are still necessary.
+
+ #
+ # Prepare the flags
+ #
+ save_CFLAGS="$CFLAGS"
+ save_LIBS="$LIBS"
+ save_CC="$CC"
+
+ # Try with the flags determined by the earlier checks.
+ #
+ # -Wl,-z,defs forces link-time symbol resolution, so that the
+ # linking checks with -shared actually have any value
+ #
+ # FIXME: -fPIC is required for -shared on many architectures,
+ # so we specify it here, but the right way would probably be to
+ # properly detect whether it is actually required.
+ CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+ CC="$PTHREAD_CC"
+
+ # In order not to create several levels of indentation, we test
+ # the value of "$done" until we find the cure or run out of ideas.
+ done="no"
+
+ # First, make sure the CFLAGS we added are actually accepted by our
+ # compiler. If not (and OS X's ld, for instance, does not accept -z),
+ # then we can't do this test.
+ if test x"$done" = xno; then
+ AC_MSG_CHECKING([whether to check for GCC pthread/shared inconsistencies])
+ AC_TRY_LINK(,, , [done=yes])
+
+ if test "x$done" = xyes ; then
+ AC_MSG_RESULT([no])
+ else
+ AC_MSG_RESULT([yes])
+ fi
+ fi
+
+ if test x"$done" = xno; then
+ AC_MSG_CHECKING([whether -pthread is sufficient with -shared])
+ AC_TRY_LINK([#include <pthread.h>],
+ [pthread_t th; pthread_join(th, 0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
+ [done=yes])
+
+ if test "x$done" = xyes; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+
+ #
+ # Linux gcc on some architectures such as mips/mipsel forgets
+ # about -lpthread
+ #
+ if test x"$done" = xno; then
+ AC_MSG_CHECKING([whether -lpthread fixes that])
+ LIBS="-lpthread $PTHREAD_LIBS $save_LIBS"
+ AC_TRY_LINK([#include <pthread.h>],
+ [pthread_t th; pthread_join(th, 0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
+ [done=yes])
+
+ if test "x$done" = xyes; then
+ AC_MSG_RESULT([yes])
+ PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ #
+ # FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc
+ #
+ if test x"$done" = xno; then
+ AC_MSG_CHECKING([whether -lc_r fixes that])
+ LIBS="-lc_r $PTHREAD_LIBS $save_LIBS"
+ AC_TRY_LINK([#include <pthread.h>],
+ [pthread_t th; pthread_join(th, 0);
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
+ [done=yes])
+
+ if test "x$done" = xyes; then
+ AC_MSG_RESULT([yes])
+ PTHREAD_LIBS="-lc_r $PTHREAD_LIBS"
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ if test x"$done" = xno; then
+ # OK, we have run out of ideas
+ AC_MSG_WARN([Impossible to determine how to use pthreads with shared libraries])
+
+ # so it's not safe to assume that we may use pthreads
+ acx_pthread_ok=no
+ fi
+
+ CFLAGS="$save_CFLAGS"
+ LIBS="$save_LIBS"
+ CC="$save_CC"
else
PTHREAD_CC="$CC"
fi
projects / platform / upstream / glog.git / commitdiff