bugGNU Scientific Library - Bugs: bug #37894, Shared library does not build on...


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bug #37894: Shared library does not build on Cygwin

Submitted by:  Jean-Pierre Flori <jpflori>
Submitted on:  Mon Dec 10 18:05:08 2012  
Category: BuildSeverity: 3 - Normal
Operating System: CygwinStatus: None
Assigned to: NoneOpen/Closed: Open

Thu Feb 20 16:31:43 2014, comment #4:

Any chance to integrate the suggested patch into the next release?
We've been using it in Sage for months without any problem on any kind of platform we support.

Jean-Pierre Flori <jpflori>
Mon Feb 4 21:42:48 2013, comment #3:

Here comes a patch implementing the proposed changes.
(Also note that some autotools variable used are deprecated.)
You would need to run "autoreconf -i" or something similar after applying the patch.

By the way, tests in the histogram and ode-initval (some message about too large order change or something like that) directories fail and correctly building a shared library let Sage (http://www.sagemath.org) pass some tests it failed before.

(file #27387)

Jean-Pierre Flori <jpflori>
Mon Dec 10 18:43:44 2012, comment #2:

The way I would do it, inspired by other project, is to modify configure.ac where MINGW and MINGW32_HOST are defined (from line 150) to something like:
case "$host_os" in
cygwin | mingw )
if test "$enable_shared" = yes; then
GSL_LDFLAGS="$GSL_LDFLAGS -no-undefined"

And in cblas/Makefile.am, replace at the top
libgslcblas_la_LDFLAGS = -version-info $(GSL_LT_CBLAS_VERSION)

libgslcblas_la_LDFLAGS += -no-undefined
libgslcblas_la_LDFLAGS = @GSL_LDFLAGS@ -version-info $(GSL_LT_CBLAS_VERSION)

And in Makefile.am, do something similar and get
libgsl_la_LDFLAGS = @GSL_LDFLAGS@ -version-info $(GSL_LT_VERSION)

See https://github.com/wbhart/mpir/blob/master/configure.in#L1840 for how this is done in MPIR.

And here https://gforge.inria.fr/scm/viewvc.php/trunk/configure.ac?view=markup&root=mpfr for MPFR.


Jean-Pierre Flori <jpflori>
Mon Dec 10 18:16:52 2012, comment #1:

Could you suggest an "if" statement that would detect those platforms?

- Rhys

Rhys Ulerich <rhysu>
Project Administrator
Mon Dec 10 18:05:08 2012, original submission:

Dear all,

Your autotools configuration files let shared library build on MinGW by passing the -no-undefined flag to libtool with the following piece of code:
libgsl_la_LIBADD += cblas/libgslcblas.la
libgsl_la_LDFLAGS += -no-undefined

The same is done for libgslcblas.

A similar trick is needed on Cygwin (and surely other flavours of MinGW which now exist).

Could you modify the tests so that the flag is passed as well on such platforms?


Jean-Pierre Flori <jpflori>


Attached Files
file #27387:  gsl-autotools.diff added by jpflori (2kB - text/x-diff - Patch for autotools files)


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    Date Changed By Updated Field Previous Value => Replaced By
    Mon Feb 4 21:42:48 2013jpfloriAttached File-=>Added gsl-autotools.diff, #27387

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