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Subject: bug#12765: "configure --disable-threads" doesn't work with coreutils-8.20
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The following build error occurs on hppa1.1-hp-hpux10.20:

   CC     src/sort.o
In file included from ../src/sort.c:26:0:
./lib/pthread.h: In function 'pthread_spin_init':
./lib/pthread.h:241:3: error: incompatible type for argument 2 of 
'pthread_mutex_init'
/usr/include/pthread.h:354:5: note: expected 'pthread_mutexattr_t' but 
argument is of type 'void *'
../src/sort.c: In function 'merge_tree_init':
../src/sort.c:3200:3: error: incompatible type for argument 2 of 
'pthread_mutex_init'
/usr/include/pthread.h:354:5: note: expected 'pthread_mutexattr_t' but 
argument is of type 'void *'
../src/sort.c: In function 'init_node':
../src/sort.c:3242:3: error: incompatible type for argument 2 of 
'pthread_mutex_init'
/usr/include/pthread.h:354:5: note: expected 'pthread_mutexattr_t' but 
argument is of type 'void *'
../src/sort.c: In function 'queue_init':
../src/sort.c:3312:3: error: incompatible type for argument 2 of 
'pthread_mutex_init'
/usr/include/pthread.h:354:5: note: expected 'pthread_mutexattr_t' but 
argument is of type 'void *'
../src/sort.c:3313:3: error: incompatible type for argument 2 of 
'pthread_cond_init'
/usr/include/pthread.h:378:5: note: expected 'pthread_condattr_t' but 
argument is of type 'void *'
../src/sort.c: In function 'sortlines':
../src/sort.c:3584:7: error: incompatible type for argument 2 of 
'pthread_create'
/usr/include/pthread.h:275:5: note: expected 'pthread_attr_t' but 
argument is of type 'void *'
../src/sort.c: In function 'main':
../src/sort.c:4210:22: error: storage size of 'act' isn't known
../src/sort.c:4215:9: warning: implicit declaration of function 
'cma_sigaction' [-Wimplicit-function-declaration]
make[2]: *** [src/sort.o] Error 1
make[2]: Leaving directory `/xxx/gnu/coreutils-8.20/objdir'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/xxx/gnu/coreutils-8.20/objdir'
make: *** [all] Error 2

hppa1.1-hp-hpux10.20 has DCE threads which predates the posix thread 
interface.

Dave

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John David Anglin    dave.anglin@HIDDEN

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To: John David Anglin <dave.anglin@HIDDEN>
Subject: bug#12765: Acknowledgement ("configure --disable-threads" doesn't
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Subject: bug#12765: "configure --disable-threads" doesn't work with coreutils-8.20
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On 10/29/2012 12:39 PM, John David Anglin wrote:
> hppa1.1-hp-hpux10.20 has DCE threads which predates the posix thread interface.

On such a platform, coreutils should run single-threaded
and shouldn't be mucking with DCE threads at all.
Can you investigate what went wrong?  Perhaps you can
send us the output of 'configure', and what's in config.h,
and the output of 'diff -u lib/pthread.in.h lib/pthread.h'.

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On 29-Oct-12, at 5:10 PM, Paul Eggert wrote:

> On 10/29/2012 12:39 PM, John David Anglin wrote:
>> hppa1.1-hp-hpux10.20 has DCE threads which predates the posix  
>> thread interface.
>
> On such a platform, coreutils should run single-threaded
> and shouldn't be mucking with DCE threads at all.
> Can you investigate what went wrong?  Perhaps you can
> send us the output of 'configure', and what's in config.h,
> and the output of 'diff -u lib/pthread.in.h lib/pthread.h'.
>


The attached change results in a successful build of sort.   It's not
optimal but I tried to avoid messing with the automake files.  I also
note that sort only seems to support pthreads.

Sorry, it appears the configure output, etc, only went to Paul.

Dave
--
John David Anglin	dave.anglin@HIDDEN



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--- pthread.in.h.orig	Tue Oct 23 10:19:34 2012
+++ pthread.in.h	Sat Nov  3 18:37:43 2012
@@ -26,7 +26,9 @@
 
 /* The include_next requires a split double-inclusion guard.  */
 #if @HAVE_PTHREAD_H@
-# @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+# ifdef USE_POSIX_THREADS
+#  @INCLUDE_NEXT@ @NEXT_PTHREAD_H@
+# endif
 #endif
 
 #ifndef _@GUARD_PREFIX@_PTHREAD_H_
@@ -38,7 +40,7 @@
 #include <sys/types.h>
 #include <time.h>
 
-#if ! @HAVE_PTHREAD_T@
+#if ! @HAVE_PTHREAD_T@ || ! defined(USE_POSIX_THREADS)
 # if !GNULIB_defined_pthread_types
  typedef int pthread_t;
  typedef int pthread_attr_t;
@@ -97,7 +99,7 @@
 #define PTHREAD_SCOPE_PROCESS 1
 #endif
 
-#if ! @HAVE_PTHREAD_T@
+#if ! @HAVE_PTHREAD_T@ || ! defined(USE_POSIX_THREADS)
 
 # if !GNULIB_defined_pthread_functions
 
@@ -226,7 +228,7 @@
 
 #endif
 
-#if ! @HAVE_PTHREAD_SPINLOCK_T@
+#if ! @HAVE_PTHREAD_SPINLOCK_T@ || ! defined(USE_POSIX_THREADS)
 
 # if !GNULIB_defined_pthread_spinlock_t
 

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On 11/03/2012 07:35 PM, John David Anglin wrote:
> The attached change results in a successful build of sort.

I'm afraid that won't work, because it assumes that the
application uses both threadlib and pthread.

Why does coreutils use threadlib, anyway?
Does anybody know?  It seems like overkill
for what coreutils needs.

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On 4-Nov-12, at 2:48 AM, Paul Eggert wrote:

> On 11/03/2012 07:35 PM, John David Anglin wrote:
>> The attached change results in a successful build of sort.
>
> I'm afraid that won't work, because it assumes that the
> application uses both threadlib and pthread.

I don't see that it assumes that the application uses both threadlib
and pthreads.  As far as I can tell, sort doesn't use threadlib.

It uses pthreads.  Thus, a fallback is needed when pthreads
is not available.  If we are not using pthreads, we get a trivial
pthread implementation from lib/pthread.h with the change.

It seemed reasonable to base this on the configure variable
USE_POSIX_THREADS.  We could get the same result by
modifying the configure result for HAVE_PTHREAD_H, etc,
but the system does have a pthread.h header.  It's just not
usable.

Another alternative might be to convert sort to use threadlib.

Dave
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On 11/04/2012 08:29 AM, John David Anglin wrote:
> It seemed reasonable to base this on the configure variable
> USE_POSIX_THREADS.

But the problem is that USE_POSIX_THREADS is set by the
threadlib configuration.

> Another alternative might be to convert sort to use threadlib.

coreutils already uses threadlib, sort of, which is part of
the problem here.  I'm not sure why it does.  The idea
was supposed to be that it uses POSIX threads or nothing.

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retitle 12765 hpux: "configure --disable-threads" failure

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