m4/ax_pthread.m4 | 76 +++++++++++++++++++++++++++++++++++++------------------
1 file changed, 52 insertions(+), 24 deletions(-)
New commits:
commit 5e029db4971e37437cfe6147d52d00136dfb8cb5
Author: Akira TAGOH <akira@xxxxxxxxx>
Date: Mon Oct 21 12:16:46 2013 +0900
Fix the dynamic loading issue on NetBSD
On NetBSD, it is not supported to load a library linked against
libpthread into a program that wasn't (since the C library provides
stubs for some pthread-functions, which might have already been called
before libpthread is loaded, leading to problems).
Patch from Matthias Drochner
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
index d383ad5..e77541c 100644
--- a/m4/ax_pthread.m4
+++ b/m4/ax_pthread.m4
@@ -162,6 +162,11 @@ case ${host_os} in
darwin*)
ax_pthread_flags="-pthread $ax_pthread_flags"
;;
+ netbsd*)
+ # use libc stubs, don't link against libpthread, to allow
+ # dynamic loading
+ ax_pthread_flags=""
+ ;;
esac
# Clang doesn't consider unrecognized options an error unless we specify
commit ff0e0d17b254f71592dfa29a988a82efefff8913
Author: Akira TAGOH <akira@xxxxxxxxx>
Date: Mon Oct 21 12:13:31 2013 +0900
Update ax_pthread.m4 to the latest version
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4
index d90de34..d383ad5 100644
--- a/m4/ax_pthread.m4
+++ b/m4/ax_pthread.m4
@@ -82,7 +82,7 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
-#serial 18
+#serial 21
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [
@@ -103,8 +103,8 @@ if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
- AC_TRY_LINK_FUNC(pthread_join, ax_pthread_ok=yes)
- AC_MSG_RESULT($ax_pthread_ok)
+ AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes])
+ AC_MSG_RESULT([$ax_pthread_ok])
if test x"$ax_pthread_ok" = xno; then
PTHREAD_LIBS=""
PTHREAD_CFLAGS=""
@@ -164,6 +164,20 @@ case ${host_os} in
;;
esac
+# Clang doesn't consider unrecognized options an error unless we specify
+# -Werror. We throw in some extra Clang-specific options to ensure that
+# this doesn't happen for GCC, which also accepts -Werror.
+
+AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags])
+save_CFLAGS="$CFLAGS"
+ax_pthread_extra_flags="-Werror"
+CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument"
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])],
+ [AC_MSG_RESULT([yes])],
+ [ax_pthread_extra_flags=
+ AC_MSG_RESULT([no])])
+CFLAGS="$save_CFLAGS"
+
if test x"$ax_pthread_ok" = xno; then
for flag in $ax_pthread_flags; do
@@ -178,7 +192,7 @@ for flag in $ax_pthread_flags; do
;;
pthread-config)
- AC_CHECK_PROG(ax_pthread_config, pthread-config, yes, no)
+ AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
if test x"$ax_pthread_config" = xno; then continue; fi
PTHREAD_CFLAGS="`pthread-config --cflags`"
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
@@ -193,7 +207,7 @@ for flag in $ax_pthread_flags; do
save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
- CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags"
# Check for various functions. We must include pthread.h,
# since some functions may be macros. (On the Sequent, we
@@ -219,7 +233,7 @@ for flag in $ax_pthread_flags; do
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
- AC_MSG_RESULT($ax_pthread_ok)
+ AC_MSG_RESULT([$ax_pthread_ok])
if test "x$ax_pthread_ok" = xyes; then
break;
fi
@@ -245,9 +259,9 @@ if test "x$ax_pthread_ok" = xyes; then
[attr_name=$attr; break],
[])
done
- AC_MSG_RESULT($attr_name)
+ AC_MSG_RESULT([$attr_name])
if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
- AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
+ AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name],
[Define to necessary symbol if this constant
uses a non-standard name on your system.])
fi
@@ -261,45 +275,54 @@ if test "x$ax_pthread_ok" = xyes; then
if test "$GCC" = "yes"; then
flag="-D_REENTRANT"
else
+ # TODO: What about Clang on Solaris?
flag="-mt -D_REENTRANT"
fi
;;
esac
- AC_MSG_RESULT(${flag})
+ AC_MSG_RESULT([$flag])
if test "x$flag" != xno; then
PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
fi
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
- ax_cv_PTHREAD_PRIO_INHERIT, [
- AC_LINK_IFELSE([
- AC_LANG_PROGRAM([[#include <pthread.h>]], [[int i = PTHREAD_PRIO_INHERIT;]])],
+ [ax_cv_PTHREAD_PRIO_INHERIT], [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
+ [[int i = PTHREAD_PRIO_INHERIT;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
])
AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"],
- AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], 1, [Have PTHREAD_PRIO_INHERIT.]))
+ [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])])
LIBS="$save_LIBS"
CFLAGS="$save_CFLAGS"
- # More AIX lossage: must compile with xlc_r or cc_r
- if test x"$GCC" != xyes; then
- AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})
- else
- PTHREAD_CC=$CC
+ # More AIX lossage: compile with *_r variant
+ if test "x$GCC" != xyes; then
+ case $host_os in
+ aix*)
+ AS_CASE(["x/$CC"],
+ [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+ [#handle absolute path differently from PATH based program lookup
+ AS_CASE(["x$CC"],
+ [x/*],
+ [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
+ [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+ ;;
+ esac
fi
-else
- PTHREAD_CC="$CC"
fi
-AC_SUBST(PTHREAD_LIBS)
-AC_SUBST(PTHREAD_CFLAGS)
-AC_SUBST(PTHREAD_CC)
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+
+AC_SUBST([PTHREAD_LIBS])
+AC_SUBST([PTHREAD_CFLAGS])
+AC_SUBST([PTHREAD_CC])
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$ax_pthread_ok" = xyes; then
- ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
+ ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
:
else
ax_pthread_ok=no
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