The gnutls vtls back-end was previously ignoring any password set via
CURLOPT_KEYPASSWD. Presumably this was because
gnutls_certificate_set_x509_key_file did not support encrypted keys.
gnutls now has a gnutls_certificate_set_x509_key_file2 function that
does support encrypted keys. Let's determine at compile time whether the
available gnutls supports this new function. If it does then use it to
pass the password. If it does not then emit a helpful diagnostic if a
password is set. This is preferable to the previous behaviour of just
failing to read the certificate without giving a reason in that case.
Signed-off-by: Mike Crowe <mac@mcrowe.com>
Since boringssl brought back DES_set_odd_parity again, it cannot be used
to differentiate from boringssl. Using the OPENSSL_IS_BORINGSSL define
seems better anyway.
URL: f551028d5c%5E!/
Original-patch-by: Bertrand Simonnet
Closes#393
This option disables any attempts in configure to create dependency on
stuff requiring linking to librt.so and libpthread.so, in this case this
means clock_gettime(CLOCK_MONOTONIC, &mt).
We were in need to build curl which doesn't link libpthread.so to avoid
the following bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=16628.
This commit requires nghttp2 v1.0.0 to compile, and migrate to v1.0.0,
and utilize recent version of nghttp2 to simplify the code,
First we use nghttp2_option_set_no_recv_client_magic function to
detect nghttp2 v1.0.0. That function only exists since v1.0.0.
Since nghttp2 v0.7.5, nghttp2 ensures header field ordering, and
validates received header field. If it found error, RST_STREAM with
PROTOCOL_ERROR is issued. Since we require v1.0.0, we can utilize
this feature to simplify libcurl code. This commit does this.
Migration from 0.7 series are done based on nghttp2 migration
document. For libcurl, we removed the code sending first 24 bytes
client magic. It is now done by nghttp2 library.
on_invalid_frame_recv callback signature changed, and is updated
accordingly.
This fixes a build failure where openssl and libmetalink are used
together and the system linker does not do implicit linking (e.g.
Fedora 13 and later releases). The MD5 functions required for
metalink support must be pulled in from the openssl crypto library.
This is similar to commit c6e7cbb94e,
which fixes the same sort of problem for NSS builds.
SSLeay was the name of the library that was subsequently turned into
OpenSSL many moons ago (1999). curl does not work with the old SSLeay
library since years. This is now reflected by only using USE_OPENSSL in
code that depends on OpenSSL.
For consistency, as we seem to have a bit of a mixed bag, changed all
instances of ipv4 and ipv6 in comments and documentations to use the
correct case.
The ability to do HTTP requests over a UNIX domain socket has been
requested before, in Apr 2008 [0][1] and Sep 2010 [2]. While a
discussion happened, no patch seems to get through. I decided to give it
a go since I need to test a nginx HTTP server which listens on a UNIX
domain socket.
One patch [3] seems to make it possible to use the
CURLOPT_OPENSOCKETFUNCTION function to gain a UNIX domain socket.
Another person wrote a Go program which can do HTTP over a UNIX socket
for Docker[4] which uses a special URL scheme (though the name contains
cURL, it has no relation to the cURL library).
This patch considers support for UNIX domain sockets at the same level
as HTTP proxies / IPv6, it acts as an intermediate socket provider and
not as a separate protocol. Since this feature affects network
operations, a new feature flag was added ("unix-sockets") with a
corresponding CURL_VERSION_UNIX_SOCKETS macro.
A new CURLOPT_UNIX_SOCKET_PATH option is added and documented. This
option enables UNIX domain sockets support for all requests on the
handle (replacing IP sockets and skipping proxies).
A new configure option (--enable-unix-sockets) and CMake option
(ENABLE_UNIX_SOCKETS) can disable this optional feature. Note that I
deliberately did not mark this feature as advanced, this is a
feature/component that should easily be available.
[0]: http://curl.haxx.se/mail/lib-2008-04/0279.html
[1]: http://daniel.haxx.se/blog/2008/04/14/http-over-unix-domain-sockets/
[2]: http://sourceforge.net/p/curl/feature-requests/53/
[3]: http://curl.haxx.se/mail/lib-2008-04/0361.html
[4]: https://github.com/Soulou/curl-unix-socket
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Commit fe0f8967bf fixed a problem with krb5 not being defined as a
supported feature when HAVE_GSSAPI is defined, however, it should
only be included if CURL_DISABLE_CRYPTO_AUTH is not set, like when
SPNEGO is listed as a feature.
By default, configure script assumes that libcurl will use the
HP-supplied GSS-API implementation which does not have krb5-config.
If a dev needs a more recent version which has that config script,
the change will allow to pass an appropriate GSSAPI_ROOT.
This is just fundamentally broken. SPNEGO (RFC4178) is a protocol which
allows client and server to negotiate the underlying mechanism which will
actually be used to authenticate. This is *often* Kerberos, and can also
be NTLM and other things. And to complicate matters, there are various
different OIDs which can be used to specify the Kerberos mechanism too.
A SPNEGO exchange will identify *which* GSSAPI mechanism is being used,
and will exchange GSSAPI tokens which are appropriate for that mechanism.
But this SPNEGO implementation just strips the incoming SPNEGO packet
and extracts the token, if any. And completely discards the information
about *which* mechanism is being used. Then we *assume* it was Kerberos,
and feed the token into gss_init_sec_context() with the default
mechanism (GSS_S_NO_OID for the mech_type argument).
Furthermore... broken as this code is, it was never even *used* for input
tokens anyway, because higher layers of curl would just bail out if the
server actually said anything *back* to us in the negotiation. We assume
that we send a single token to the server, and it accepts it. If the server
wants to continue the exchange (as is required for NTLM and for SPNEGO
to do anything useful), then curl was broken anyway.
So the only bit which actually did anything was the bit in
Curl_output_negotiate(), which always generates an *initial* SPNEGO
token saying "Hey, I support only the Kerberos mechanism and this is its
token".
You could have done that by manually just prefixing the Kerberos token
with the appropriate bytes, if you weren't going to do any proper SPNEGO
handling. There's no need for the FBOpenSSL library at all.
The sane way to do SPNEGO is just to *ask* the GSSAPI library to do
SPNEGO. That's what the 'mech_type' argument to gss_init_sec_context()
is for. And then it should all Just Work™.
That 'sane way' will be added in a subsequent patch, as will bug fixes
for our failure to handle any exchange other than a single outbound
token to the server which results in immediate success.
The old way using getpwuid could cause problems in programs that enable
reading from netrc files simultaneously in multiple threads.
Reported-by: David Woodhouse
When --with-nghttp2 was used (without a given path), the
PKG_CONFIG_LIBDIR varialbe could get clobbered and ruin a proper
detection of the library.
Reported-by: Dilyan Palauzov
Bug: http://curl.haxx.se/mail/lib-2014-04/0159.html
The issue is with HP-UX that is comes with HP flavor of MIT
Kerberos. This means that there is no krb5-config and the lib is called
libgss.so
Bug: http://curl.haxx.se/bug/view.cgi?id=1321
The ipv6 auto-detect test in configure returns a false negative when
CFLAGS contains -Werror=implicit-function-declaration. (I have been
using this flag to detect code issues that would result in SEGVs on
x86_64-cygwin.)
Patch-by: Yaakov Selkowitz
Bug: http://curl.haxx.se/bug/view.cgi?id=1304
We've announced this pending removal for a long time and we've
repeatedly asked if anyone would care or if anyone objects. Nobody has
objected. It has probably not even been working for a good while since
nobody has tested/used this code recently.
The stuff in krb4.h that was generic enough to be used by other sources
is now present in security.h
For libc variants without a spearate pthread lib (like bionic), try
using pthreads without the pthreads lib first and only if that fails try
the -lpthread linker flag.
Bug: http://curl.haxx.se/bug/view.cgi?id=1216
Reported by: Duncan
1 - We don't use the results from the test and we never did. recvfrom()
is only used by the TFTP code and it has not caused any problems.
2 - the CURL_CHECK_FUNC_RECVFROM function is extremely slow
This function was only used twice, both in places where performance
isn't crucial (socks + if2ip). Removing the use of this function removes
the need to have our private version for systems without it == reduced
amount of code.
Also, in the SOCKS case it is clearly better to fail gracefully rather
than to truncate the results.
This work was triggered by a bug report on the strcal prototype in
strequal.h.
strlcat was added in commit db70cd28 in February 2001!
Bug: http://curl.haxx.se/bug/view.cgi?id=1192
Reported by: Jeremy Huddleston
Some basic checks we make were placed early enough in generated
configure script when using autoconf 2.5X versions. Newer autoconf
versions expand these checks much further into the configure script,
rendering them useless. Using XC_CONFIGURE_PREAMBLE fixes placement
of early intended checks across all our autoconf supported versions.
Tested with:
buildconf: autoconf version 2.69
buildconf: autom4te version 2.69
buildconf: autoheader version 2.69
buildconf: automake version 1.13.1
buildconf: aclocal version 1.13.1
buildconf: libtool version 2.4
buildconf: GNU m4 version 1.4.16
I ran the 2.59 version of autoupdate that updates obsoleted configure.ac
constructs to the 2.59 standard. With a little hands-on fiddling I
prevented it from ruining the quoting in AS_HELP_STRING() uses.
I subsequently also bumped the required autoconf version to 2.59
(released in December 2003) as I don't have an older autoconf version
around to test with and I can't be bothered to install one either...
Inspired by: Björn Stenberg
Related blog post: http://cazfi.livejournal.com/195108.html
This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:
f871de0... build: make use of 76 lib/*.h renamed files
ffd8e12... build: rename 76 lib/*.h files
This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:
c087374... curl_setup.h: remove redundant include guard
This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:
13606bb... build: make use of 93 lib/*.c renamed files
5b6e792... build: rename 93 lib/*.c files
7d83dff... build: commit 13606bbfde follow-up 1
Start of related discussion thread:
http://curl.haxx.se/mail/lib-2013-01/0012.html
Asking for confirmation on pushing this revertion commit:
http://curl.haxx.se/mail/lib-2013-01/0048.html
Confirmation summary:
http://curl.haxx.se/mail/lib-2013-01/0079.html
NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.
lib/curl_imap.h
lib/curl_smtp.h
automake 1.13 errors if AM_CONFIG_HEADER is used in configure script.
automake 1.13 no longer autoupdates AM_CONFIG_HEADER to
AC_CONFIG_HEADERS, thing which automake has been doing since automake
version 1.7
Given that our first automake supported version is automake 1.7,
simply replacing AM_CONFIG_HEADER usage with AC_CONFIG_HEADERS seems
enough to yet support same automake versions.
Dave Reisner reported issue with 1.13 and provided patch.
http://curl.haxx.se/mail/lib-2012-12/0246.html
BLANK_AT_MAKETIME may be used in our Makefile.am files to blank
LIBS variable used in generated makefile at makefile processing
time. Doing this functionally prevents LIBS from being used for
all link targets in given makefile.
AIX sys/poll.h header file defines 'events' and 'revents' as C
preprocessor macros. Usage of these literals in libcurl's external
API was introduced in commit de24d7bd4c causing AIX build failures.
Appropriate inclusion of sys/poll.h by libcurl's external interface
fixes AIX build and usage issues while avoiding a SONAME bump.
Removing this option as it currently only functions to lure people into
wrongly using it and falsely believing that libcurl will work fine
without using nonblocking sockets internally - which leads to hard to
track or understand errors.
This needs another look from the configure experts. I tested that
it works so far with MinGW64 cross-compiler; libcurl builds and
links fine, but curl not yet ...
Allow NTLM authentication when building using SecureTransport (Darwin) for SSL.
This uses CommonCrypto, a cryptography library that ships with all versions of
iOS and Mac OS X. It's like OpenSSL's libcrypto, except that it's missing a few
less-common cyphers and doesn't have a big number data structure.
This option may be used to build curl/libcurl using SSL/TLS support provided
by MS windows system libraries. Option is mutually exclusive with any other
SSL library. Default value is --without-winssl.
--with-winssl option implies --with-sspi option.
Option meaningful only for Windows builds.
Version number is removed in order to make this info consistent with
how we do it with other MS and Linux system libraries for which we don't
provide this info.
Identifier changed from 'WinSSPI' to 'schannel' given that this is the
actual provider of the SSL/TLS support. libcurl can still be built with
SSPI and without SCHANNEL support.
This change adds experimental Metalink support to curl.
To enable Metalink support, run configure with --with-libmetalink.
To feed Metalink file to curl, use --metalink option like this:
$ curl -O --metalink foo.metalink
We use libmetalink to parse Metalink files.
It checks whether versioned symbols should be enabled before checking
whether it is possible (i.e. the linker supports --version-script) or
not. This avoids a useless warning when building cURL on a platform that
does not use GNU ld.
Moreover, it fixes broken indentation of this chunk of code.
NSS_InitContext() was introduced in NSS 3.12.5 and helps to prevent
collisions on NSS initialization/shutdown with other libraries.
Bug: https://bugzilla.redhat.com/738456
configure script now provides conditional definitions for Makefile.am
that result in CURL_HIDDEN_SYMBOLS being defined by resulting makefiles
when appropriate.
Additionally, configure script option for symbol hiding control is now
named --enable-symbol-hiding --disable-symbol-hiding. While still valid,
old option name --enable-hidden-symbols --disable-hidden-symbols will
be deprecated in some future release.
BUILDING_LIBCURL and CURL_STATICLIB are no longer defined in curl_config.h,
configure will generate appropriate conditionals so that mentioned symbols
get defined and used in Makefiles at compilation time
Configuration files such as curl_config.h and all config-*.h no longer exist
nor are generated/copied into 'src' directory, now these only exist in 'lib'
directory from where curl tool sources uses them.
Additionally old src/setup.h has been refactored into src/tool_setup.h which
now pulls lib/setup.h
The possibility of a makefile needing an include path adjustment exists.
This allows building of libcurl on DOS using DJGPP 2.04 and Watt-32
sockets. I know there's already Makefile.djgpp, but I find this more
convenient since I'm used to using the ./configure script from other
platforms
Modify configure.ac to test for new CyaSSL Init function and remove
default install path to system. Change to CyaSSL OpenSSL header and
proper Init in code as well.
Note that this no longer detects or works with CyaSSL before v2
When support for nettle was added in 64f328c787, I overlooked
the fact that AC_CHECK_LIB doesn't add the tested lib to LIBS
if the check succeeded, if a custom success code block was present.
(The previous version of the check had an empty block for
successful checks, adding the lib to LIBS implicitly.)
Therefore, explicitly add either nettle or gcrypt to LIBS, after
deciding which one to use. Even if they can be linked in
transitively, it is safer to actually link explicitly to them.
This fixes building with gnutls with linkers that don't allow
linking transitively, such as for windows.
Allow, at configure time, the production of versioned symbols. The
symbols will look like "CURL_<FLAVOUR>_<VERSION> <SYMBOL>", where
<FLAVOUR> represents the SSL flavour (e.g. OPENSSL, GNUTLS, NSS, ...),
<VERSION> is the major SONAME version and <SYMBOL> is the actual symbol
name. If no SSL library is enabled the symbols will be just
"CURL_<VERSION> <SYMBOL>".
If no SSLv2 was detected in OpenSSL by configure, then we enforce the
OPENSSL_NO_SSL2 define as it seems some people report it not being
defined properly in the OpenSSL headers.
configure.ac:1349: error: possibly undefined macro: PKG_CONFIG_LIBDIR
Obviously this is not a problem with pkg-config 0.26 but older versions
seem to show this.
Fix suggested by: Kamil Dudka
Reported by: Guenter
Bug: http://curl.haxx.se/mail/lib-2011-11/0298.html
Configure script option --enable-wb-ntlm-auth renamed to --enable-ntlm-wb
Configure script option --disable-wb-ntlm-auth renamed to --disable-ntlm-wb
Preprocessor symbol WINBIND_NTLM_AUTH_ENABLED renamed to NTLM_WB_ENABLED
Preprocessor symbol WINBIND_NTLM_AUTH_FILE renamed to NTLM_WB_FILE
Test harness env var CURL_NTLM_AUTH renamed to CURL_NTLM_WB_FILE
Static function wb_ntlm_close renamed to ntlm_wb_cleanup
Static function wb_ntlm_initiate renamed to ntlm_wb_init
Static function wb_ntlm_response renamed to ntlm_wb_response
Feature string literal NTLM_SSO renamed to NTLM_WB.
Preprocessor symbol USE_NTLM_SSO renamed to WINBIND_NTLM_AUTH_ENABLED.
curl's 'long' option 'ntlm-sso' renamed to 'ntlm-wb'.
Fix some comments to make clear that this is actually a NTLM delegation.
IRIX 6.5.24 gcc 3.3 autobuilds fail unittests library compilation due to a
problem related with OpenSSL headers and library versions not matching.
All AIX autobuilds fails unit tests linking against unittests library due to
unittests library being built with no symbols or members. Libtool ?
Use preprocessor symbols WINBIND_NTLM_AUTH_ENABLED and WINBIND_NTLM_AUTH_FILE
for Samba's winbind daemon ntlm_auth helper code implementation and filename.
Retain preprocessor symbol USE_NTLM_SSO for NTLM single-sign-on feature
availability implementation independent.
For test harness, prefix NTLM_AUTH environment vars with CURL_
Refactor and rename configure option --with-ntlm-auth to --enable-wb-ntlm-auth[=FILE]
"test -e" is POSIX but clearly was not supported by the SunOS sh
version, -f is supported and should be a decent equivalent
Bug: http://curl.haxx.se/bug/view.cgi?id=3371574
cross-compilation of unit tests static library/programs fails when
libcurl shared library is also built. This might be due to a libtool or
automake issue. In this case we disable unit tests.
Now use gai_strerror() to get proper error messages when getaddrinfo()
has failed. Detect the function in configure.
Code based on work and suggestions by Jeff Pohlmeyer and Guenter Knauf
The script didn't properly add the -lssh2 link option when it enabled
libssh2 linking where pkg-config isn't found.
Reported by: Saqib Ali
Bug: http://curl.haxx.se/mail/lib-2011-04/0054.html
configure.ac: Test harness libhostname library will not be built for Windows.
runtests.pl: LD_PRELOAD mechanism will not be used to load libhostname
library on operating systems which lack LD_PRELOAD support.
Added axTLS to autotool files and glue code to misc other files.
axtls.h maps SSL API functions, but may change.
axtls.c is just a stub file and will definitely change.
If --librtmp was specified but pkg-config could not find the librtmp
file, we would have undefined symbols when linking curl.
We prevent this error by disabling this case as suggested on the mailing
list.
Instead of reopening the downloaded file, fsetxattr uses the (already
open) file descriptor to attach extended attributes. This makes the
procedure more robust against errors caused by moved or deleted files.
setxattr is a glibc call to set extended attributes, so configure now
checks for it and the code is adapted to only build when the
functionality is present.
In libssh2 1.2.8, libssh2_session_handshake() replaces
libssh2_session_startup() to fix the previous portability problem with
the socket type that was too small for win64 and thus easily could cause
crashes and more.
... for example when LDAP is not compiled.
Fixed the logic to match the rest of the options' message that is we
update the default message only if the option is not disabled after the
different checks.
Reported by: Guenter Knauf
librtmp is often statically linked and using sub dependencies like
OpenSSL, so we need to make sure we can actually link with it properly
before enabling it. Otherwise we easily end up trying to link with a
RTMP lib that fails.
1 - libcurl assumes that there are gcrypt functions available when
GnuTLS is.
2 - GnuTLS can be built to use libnettle instead as crypto library,
which breaks assumption (1)
This change makes configure make sure that if GnuTLS is requested and
detected, it also makes sure that gcrypt is present or it errors
out. This is mostly a way to make the user more aware of this flaw, the
correct fix would be to detect which crypto layer that is in use and
adapt our code to use that instead of blindly assuming gcrypt.
Reported by: Michal Gorny
Bug: http://curl.haxx.se/bug/view.cgi?id=3071038
libssh2 1.2.6 and later handle >32bit file sizes properly even on 32bit
architectures and we make sure to use that ability.
Reported by: Mikael Johansson
Bug: http://curl.haxx.se/mail/lib-2010-08/0052.html
The curl-config now features a --built-shared command line option that
will output 'yes' or 'no' depending if the build process was asked to
build shared library/libraries or not.
It is primarily made to offer more details to the test suite to know
what kind of stunts it can expect to work.
This passes -Werror to gcc when building curl and libcurl,
allowing easy dection of compile warnings.
Signed-off-by: Ben Greear <greearb@candelatech.com>
configure checks for grep, egrep, sed and ar and set the variables GREP,
EGREP, SED and AR accordingly. We now let already set variables override
the internal choices to let users make decisions when they know the
right choice already. This is a regression as our configure script used
to allow this back before commit 0b57c475 (up to 7.18.2).
Reported by: "kdekker"
Bug: http://curl.haxx.se/bug/view.cgi?id=3028318
When configured with '--without-ssl --with-nss', NTLM authentication
now uses NSS crypto library for MD5 and DES. For MD4 we have a local
implementation in that case. More details are available at
https://bugzilla.redhat.com/603783
In order to get it working, curl_global_init() must be called with
CURL_GLOBAL_SSL or CURL_GLOBAL_ALL. That's necessary because NSS needs
to be initialized globally and we do so only when the NSS library is
actually required by protocol. The mentioned call of curl_global_init()
is responsible for creating of the initialization mutex.
There was also slightly changed the NSS initialization scenario, in
particular, loading of the NSS PEM module. It used to be loaded always
right after the NSS library was initialized. Now the library is
initialized as soon as any SSL or NTLM is required, while the PEM module
is prevented from being loaded until the SSL is actually required.
Enable OpenLDAP support for cygwin builds. This support was disabled back
in 2008 due to incompatibilities between OpenSSL and OpenLDAP headers.
cygwin's OpenSSL 0.9.8l and OpenLDAP 2.3.43 versions on cygwin 1.5.25
allow building an OpenLDAP enabled libcurl supporting back to Windows 95.
Remove non-functional CURL_LDAP_HYBRID code and references.
makes the LDAP code much cleaner, nicer and in general being a
better libcurl citizen. If a new enough OpenLDAP version is
detect, the new and shiny lib/openldap.c code is then used
instead of the old cruft
Code by Howard, minor cleanups by Daniel.
"The BSD version of PolarSSL was made for migratory purposes only and is not
maintained. The GPL version of PolarSSL is actually the only actively
developed version, so I would be very reluctant to use the BSD version." /
Paul Bakker, PolarSSL hacker.
Signed-off-by: Hoi-Ho Chan <hoiho.chan@gmail.com>
This is Hoi-Ho Chan's patch with some minor fixes by me. There
are some potential issues in this, but none worse than we can
sort out on the list and over time.
On some ancient distributions such as RHEL-3, <gssapi/gssapi_krb5.h> needs
to be processed after <gssapi/gssapi.h>, but does not include it itself.
This patch checks for <gssapi/gssapi.h> first and then includes it
in the test for <gssapi/gssapi_krb5.h>, resolving the problem.
Without the patch, <gssapi/gssapi_krb5.h> is "present but cannot be
compiled".
ran into some issues with the GSSAPI tests in configure.ac. The tests first
try to determine the include dirs and libs and set CPPFLAGS and LIBS
accordingly. It then checks for the headers and finally sets LIBS a second
time, causing the libs to be included twice. The first setting of LIBS seems
redundant and should be left out, since the first part is otherwise just
about finding headers.
My second issue is that 'krb5-config --libs gssapi' on Darwin is less than
useless and returns junk that, while it happens to work with gcc, causes
clang to choke. For example, --libs returns $CFLAGS along with the libs,
which is really retarded. Simply setting 'LIBS="$LIBS -lgssapi_krb5
-lresolv"' on Darwin is sufficient.
being properly detected under certain circumstances. It had been caused by
strange behavior of pkg-config when handling PKG_CONFIG_LIBDIR. pkg-config
distinguishes among empty and non-existent environment variable in that case.
for use by non-configure systems. As intended, configure would overwrite the
distributed one when doing in-tree builds. But VPATH builds would end having
two curlbuild.h files, one in the source tree and another in the build tree.
--with-nss is set but not "yes".
I think we can still improve that to check for pkg-config in that path etc,
but at least this patch brings back the same functionality we had before.
statically linking since libssh2 needs the SSL library link flags to be
set up already to satisfy its dependencies. This wouldn't be necessary
if the libssh2 configure check was changed to use pkg-config since the
--static flag would add the dependencies automatically.
when cross-compiling. The key to success is then you properly setup
PKG_CONFIG_PATH before invoking configure.
I also improved how NSS is detected by trying nss-config if pkg-config isn't
present, and as a last resort just use the lib name and force the user to
setup the LIBS/LDFLAGS/CFLAGS etc properly. The previous last resort would
add a range of various libs that would almost never be quite correct.
Tim Rühsen