Problems under Windows

[olexandr-konovalov]

In GAP 4.9.3 (publishing in progress) building curlInterface under cygwin finishes without errors:

...
checking for curl-config... /usr/bin/curl-config
curl found - remote install options available
checking that generated files are newer than configure... done
configure: creating ./config.status
 /bin/sh ./config.status
config.status: creating Makefile
config.status: creating src/pkgconfig.h
config.status: src/pkgconfig.h is unchanged
config.status: executing depfiles commands
config.status: executing libtool commands
  CC       src/curl_la-curl.lo
  CCLD     curl.la
/usr/bin/mkdir -p bin/i686-pc-cygwin-default32
cp .libs/curl.dll bin/i686-pc-cygwin-default32/curl.so

however, loading it on the same machine, both with gap.sh under Cygwin and with gap.bat from Windows file explorer results in:

gap> LoadPackage("curlIn");
Syntax warning: Unbound global variable in /proc/cygdrive/C/gap-4.9.3/pkg/curlInterface-2.0.2/gap/curl.gi:37
    return CURL_REQUEST(URL, type, out_string, r.verifyCert, r.verbose);
                       ^
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
Loading  curlInterface 2.0.2 (Simple Web Access)
by Christopher Jefferson (http://caj.host.cs.st-andrews.ac.uk/) and
   Michael Torpey (http://www-groups.mcs.st-andrews.ac.uk/~mct25/).
Homepage: https://gap-packages.github.io/curlInterface/
─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
true
gap>

On a Cygwin-free machine it's even worse:

gap> LoadPackage("curlIn");
#W dlopen() error: No such file or directory
Error, module '/proc/cygdrive/C/gap-4.9.3/pkg/curlInterface-2.0.2/bin/i686-pc-cygwin-default32/curl.so' not found in
  if not LOAD_DYN( arg[1], false ) then
    Error( "no support for dynamic loading" );
fi; at /proc/cygdrive/C/gap-4.9.3/lib/files.gd:583 called from
<function "LoadDynamicModule">( <arguments> )
 called from read-eval loop at /proc/cygdrive/C/gap-4.9.3/pkg/curlInterface-2.0.2/init.g:8
Error, was not in any namespace at /proc/cygdrive/C/gap-4.9.3/lib/variable.g:291 called from
LEAVE_NAMESPACE(  ); at /proc/cygdrive/C/gap-4.9.3/lib/package.gi:1210 called from
ReadPackage( pkgname, "init.g" ); at /proc/cygdrive/C/gap-4.9.3/lib/package.gi:1583 called from
<function "LoadPackage">( <arguments> )
 called from read-eval loop at *stdin*:1
you can 'quit;' to quit to outer loop, or
you can 'return;' to continue
brk>

[mtorpey]

It looks like the C functions in curl.c aren't being imported properly, but I don't know enough about Cygwin and Windows to know why that might be. Perhaps @ChrisJefferson has seen this sort of thing before?

[ChrisJefferson]

So, the first problem I can't produce here, but it might be connected to the second.

To run curl we need to copy a whole bunch of files. In particular, these (adjust the final . if you use something else in your scripts)

cp /bin/cygcurl* /bin/cygidn* /bin/cygcrypto* /bin/cyggssapi* /bin/cyglber* /bin/cygldap* /bin/cygnghttp2* /bin/cygssh* /bin/cygpsl* /bin/cygssl* /bin/cygkrb* /bin/cygk5crypto* /bin/cygintl* /bin/cygcom_err* /bin/cygunistring* /bin/cygiconv* /bin/cygsasl* .

[olexandr-konovalov]

On my Cygwin, I do not have /bin/cygnghttp2* and /bin/cygpsl*. Now retrying without them.

[olexandr-konovalov]

On a new Cygwin machine, I do have /bin/cygnghttp2* and /bin/cygpsl*. With this it seems that I achieve portable curlInterface. It loads, and TestPackage("curlinterface"); runs. I suggest to close it after GAP 4.10.1 release to make one more clean check.

[olexandr-konovalov]

The package is now loadable in GAP 4.10.1 for Windows.