[gstreamer-bugs] [Bug 572993] New: Broken libregex dependency on Windows

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: git
           Summary: Broken libregex dependency on Windows
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: lrn1986 at gmail.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


I'm trying to build plugins-base (with enabled subparse) on Windows with
MinGW/MSys. It requires reg* functions (declared in regex.h). I found necessary
package (with import library, shared library and header) at
http://sourceforge.net/project/showfiles.php?group_id=7382&package_id=12650

Configure picks up regex.h and subsequently enables subparse, however it never
passes -lregex to the linker (and i can't find a place where it should do that,
it seems that configure script is not supposed to do that at all), as a result
subparse fails to build:

libtool: link:  gcc -shared .libs/libgstsubparse.dll.def 
.libs/libgstsubparse_la-gstssaparse.o .libs/libgstsubparse_la-gstsubparse.o
.libs/libgstsubparse_la-samiparse.o .libs/libgstsubparse_la-tmplayerparse.o
.libs/libgstsubparse_la-mpl2parse.o   -LD:/msys/local/lib -L/usr/local/lib
-L/d/python26/Lib /usr/local/lib/libgstbase-0.10.dll.a
/usr/local/lib/libgstreamer-0.10.dll.a -lgobject-2.0 -lgmodule-2.0
-lgthread-2.0 /usr/local/lib/libxml2.dll.a -ldl -lpthread -lws2_32 -lglib-2.0
/usr/local/lib/libintl.dll.a /usr/local/lib/libiconv.dll.a  -mms-bitfields
-mms-bitfields   -o .libs/libgstsubparse.dll -Wl,--enable-auto-image-base
-Xlinker --out-implib -Xlinker .libs/libgstsubparse.dll.a
Info: resolving ___gst_debug_min by linking to __imp____gst_debug_min
(auto-import)
Creating library file: .libs/libgstsubparse.dll.a
d:/mingw/bin/../lib/gcc/mingw32/4.3.0/../../../../mingw32/bin/ld.exe: warning:
auto-importing has been activated without --enable-auto-import specified on the
command line.
This should work unless it involves constant data structures referencing
symbols from auto-imported DLLs.
.libs/libgstsubparse_la-gstsubparse.o: In function
`gst_sub_parse_data_format_autodetect':
d:\projects\gst-plugins-base\gst\subparse/gstsubparse.c:1003: undefined
reference to `regexec'
d:\projects\gst-plugins-base\gst\subparse/gstsubparse.c:1007: undefined
reference to `regexec'
d:\projects\gst-plugins-base\gst\subparse/gstsubparse.c:992: undefined
reference to `regcomp'
d:\projects\gst-plugins-base\gst\subparse/gstsubparse.c:992: undefined
reference to `regcomp'
d:\projects\gst-plugins-base\gst\subparse/gstsubparse.c:998: undefined
reference to `regerror'

configuring with LDFLAGS="-L/local/lib" and LIBS="-lregex" fixes the problem.

Alternatively you may want to rewrite subparse to use GLib for regular
expressions.


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