Re: [libitm] Link with -litm and -pthread

[Eric Botcazou <ebotcazou at adacore dot com>]

> It broke all targets that don't implement threads and as such
> don't support -pthread.  And you need to gate *all* tm-related
> tests on something like check_effective_target_pthread.

The question is, how is libitm supposed to work on these systems?  The 
configure.ac file contains:

# Check to see if -pthread or -lpthread is needed.  Prefer the former.
# In case the pthread.h system header is not found, this test will fail.
XPCFLAGS=""
CFLAGS="$CFLAGS -pthread"
AC_LINK_IFELSE(
 [AC_LANG_PROGRAM(
  [#include <pthread.h>
   void *g(void *d) { return NULL; }],
  [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
 [XPCFLAGS=" -Wc,-pthread"],
 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
  AC_LINK_IFELSE(
   [AC_LANG_PROGRAM(
    [#include <pthread.h>
     void *g(void *d) { return NULL; }],
    [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
   [],
   [AC_MSG_ERROR([Pthreads are required to build libitm])])])

> Can't you just limit adding -pthread to Solaris 8 or something?

I didn't invent anything here, this is exactly how -fopenmp/libgomp works.

Just define GTM_SELF_SPECS to "" like Darwin and Windows.

-- 
Eric Botcazou