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Don't link with libgnutls-openssl, which is now GPLv3+.

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ELinks used to call the MD5 code in libgnutls-openssl, part of
GNUTLS-EXTRA, which was licensed under GNU GPL version 2 or later.
In GnuTLS 2.2.0 however, the license of GNUTLS-EXTRA has been changed
to GNU GPL version 3 or later.  This is no longer compatible with
GNU GPL version 2 as used in the current ELinks, because GPLv2 clause
2. b) requires the whole work to be licensed under GPLv2, and GPLv3
does not allow that.

If anyone is still using a pre-2.2 GnuTLS, he or she can tweak
configure.in to check the version or just assume it's old enough.
There is not much reason to do so though, as including the MD5 code
in ELinks seems to cost only about 4 kilobytes on i686.
(cherry picked from commit 9ca0182ec6)
This commit is contained in:
Kalle Olavi Niemitalo 2008-08-17 17:36:43 +03:00 committed by Kalle Olavi Niemitalo
parent 018af50f1d
commit 64f0f6e7a8
2 changed files with 6 additions and 6 deletions
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2
NEWS
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@ -223,6 +223,8 @@ To be released as 0.11.5.
* bug 698: Attach controls to the intended form even if it is
incorrectly nested in a table. (Was broken in 0.11.4.)
* build bug 1021: fixed uninitialized variable in http_got_header
* build: don't use libgnutls-openssl, which is no longer GPLv2
compatible in GnuTLS 2.2.0
ELinks 0.11.4:
--------------

10
configure.in
View File

@ -1090,12 +1090,10 @@ else
CFLAGS="$CFLAGS_X"
AC_SUBST(GNUTLS_CFLAGS)
# Verify if the MD5 compatibility layer is usable.
CONFIG_GNUTLS_OPENSSL_COMPAT=yes
EL_CHECK_OPTIONAL_LIBRARY(CONFIG_GNUTLS_OPENSSL_COMPAT,
[GNU TLS OpenSSL compatibility],
gnutls/openssl.h, gnutls-openssl,
MD5_Init)
# GnuTLS 2.2.0 changed libgnutls-openssl from GPLv2+
# to GPLv3+. Don't link that with the GPLv2 ELinks.
# ELinks will use its internal MD5 code instead.
CONFIG_GNUTLS_OPENSSL_COMPAT=no
else
if test -n "$gnutls_withval" && test "x$gnutls_withval" != xno; then
AC_MSG_ERROR([GNUTLS (1.2 or later) not found. ELinks no longer supports GNUTLS 1.1.])