#4523: unix package does not check properly for sem_close
---------------------------------+------------------------------------------
Reporter: bos | Owner:
Type: bug | Status: new
Priority: normal | Component: libraries/unix
Version: 7.0.1 | Keywords:
Testcase: | Blockedby:
Os: Linux | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
On modern Linux systems (in my case, Fedora 13 and 14), the
{{{sem_close}}} and other functions are in the {{{rt}}} and {{{pthread}}}
libraries. This combination is not checked for properly by the {{{unix}}}
package's {{{autoconf}}} script. As a result attempting to build the
{{{unix}}} package will succeed, but linking applications against the
misconfigured {{{unix}}} will result in undefined symbol errors for e.g.
{{{sem_close}}}.
I believe that the C compiler needs to be invoked with {{{-pthread}}} for
the right thing to happen, as {{{unix.buildinfo}}} contains a reference to
{{{rt}}} that is nevertheless not enough:
{{{
buildable: True
cc-options:
ld-options:
extra-libraries: rt util dl
}}}
Here's my current workaround hack:
{{{
--- old-unix/configure.ac 2010-11-23 15:25:33.741849630 -0800
+++ new-unix/configure.ac 2010-11-23 15:25:33.760849987 -0800
@@ -215,6 +215,9 @@
PTHREAD_CFLAGS=-pthread
PTHREAD_LDFLAGS=-pthread
;;
+linux*)
+ PTHREAD_LIBS=pthread
+ ;;
esac
AC_SUBST(PTHREAD_CFLAGS)
AC_SUBST(PTHREAD_LDFLAGS)
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4523>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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