[asterisk-bugs] [Asterisk 0017616]: [patch] Configure sets ac_cv_fork_works=no incorrectly for uclibc

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
====================================================================== 
https://issues.asterisk.org/view.php?id=17616 
====================================================================== 
Reported By:                pprindeville
Assigned To:                
====================================================================== 
Project:                    Asterisk
Issue ID:                   17616
Category:                   Core/BuildSystem
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.6.2.9 
JIRA:                       SWP-1835 
Regression:                 Yes 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
====================================================================== 
Date Submitted:             2010-07-09 12:47 CDT
Last Modified:              2010-07-17 00:34 CDT
====================================================================== 
Summary:                    [patch] Configure sets ac_cv_fork_works=no
incorrectly for uclibc
Description: 
The generated top-level configure contains:

if test "x$ac_cv_func_fork_works" = xcross; then
 case $host in
  *-*-amigaos* | *-*-msdosdjgpp* | *-*-uclinux* | *-*-linux-uclibc* )
    # Override, as these systems have only a dummy fork() stub
    ac_cv_func_fork_works=no
    ;;

this is wrong.  The linux-uclibc fork() works just fine.


====================================================================== 

---------------------------------------------------------------------- 
 (0124668) pprindeville (reporter) - 2010-07-17 00:34
 https://issues.asterisk.org/view.php?id=17616#c124668 
---------------------------------------------------------------------- 
Just to follow up, here's the relevant portion of that file:

  1763  # AC_FUNC_FORK
  1764  # -------------
  1765  AN_FUNCTION([fork],  [AC_FUNC_FORK])
  1766  AN_FUNCTION([vfork], [AC_FUNC_FORK])
  1767  AC_DEFUN([AC_FUNC_FORK],
  1768  [AC_REQUIRE([AC_TYPE_PID_T])dnl
  1769  AC_CHECK_HEADERS(vfork.h)
  1770  AC_CHECK_FUNCS(fork vfork)
  1771  if test "x$ac_cv_func_fork" = xyes; then
  1772    _AC_FUNC_FORK
  1773  else  1774    ac_cv_func_fork_works=$ac_cv_func_fork
  1775  fi
  1776  if test "x$ac_cv_func_fork_works" = xcross; then
  1777    case $host in
  1778      *-*-amigaos* | *-*-msdosdjgpp*)
  1779        # Override, as these systems have only a dummy fork() stub
  1780        ac_cv_func_fork_works=no
  1781        ;;
  1782      *)  1783        ac_cv_func_fork_works=yes
  1784        ;;
  1785    esac
  1786    AC_MSG_WARN([result $ac_cv_func_fork_works guessed because of
cross co
mpilation])
  1787  fi
  1788  ac_cv_func_vfork_works=$ac_cv_func_vfork
  1789  if test "x$ac_cv_func_vfork" = xyes; then
  1790    _AC_FUNC_VFORK
  1791  fi;
  1792  if test "x$ac_cv_func_fork_works" = xcross; then
  1793    ac_cv_func_vfork_works=$ac_cv_func_vfork
  1794    AC_MSG_WARN([result $ac_cv_func_vfork_works guessed because of
cross c
ompilation])
  1795  fi
  1796  
  1797  if test "x$ac_cv_func_vfork_works" = xyes; then
  1798    AC_DEFINE(HAVE_WORKING_VFORK, 1, [Define to 1 if `vfork'
works.])
  1799  else
  1800    AC_DEFINE(vfork, fork, [Define as `fork' if `vfork' does not
work.])
  1801  fi
  1802  if test "x$ac_cv_func_fork_works" = xyes; then
  1803    AC_DEFINE(HAVE_WORKING_FORK, 1, [Define to 1 if `fork' works.])
  1804  fi
  1805  ])# AC_FUNC_FORK

As you see, only amigaos and msdosdjgpp fail to support fork(). 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2010-07-17 00:34 pprindeville   Note Added: 0124668                          
======================================================================