Fix automatic libraries soname detection

Previously, the automatic soname detection were failing when the
-Wl,--as-needed option was provided in LDFLAGS, which lead the FIPS
self-tests to fail.

gnutls-3.6.14-configure-fix-soname-detection.patch

@@ -0,0 +1,60 @@
+From b57b820a3f0464e3151dd675af4f28ad109d683c Mon Sep 17 00:00:00 2001
+From: Vitezslav Cizek <vcizek@suse.com>
+Date: Tue, 9 Jun 2020 13:54:04 +0200
+Subject: [PATCH] configure: improve nettle, gmp, and hogweed soname detection
+
+Some linkers might optimize away the libraries passed on the
+command line if they aren't actually needed, such as gnu ld with
+--as-needed.
+The ldd output then won't list the shared libraries and the
+detection will fail.
+Make sure nettle and others are really used.
+
+Signed-off-by: Vitezslav Cizek <vcizek@suse.com>
+---
+ configure.ac | 15 ++++++++++++---
+ 1 file changed, 12 insertions(+), 3 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index e4ca66aec..ccbe4e563 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -741,7 +741,10 @@ LIBS=$save_LIBS
+ save_LIBS=$LIBS
+ LIBS="$LIBS $GMP_LIBS"
+ AC_MSG_CHECKING([gmp soname])
+-AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
++AC_LINK_IFELSE([AC_LANG_PROGRAM([
++               #include <gmp.h>],[
++               mpz_t n;
++               mpz_init(n);])],
+ 	[gmp_so=`(eval "$LDDPROG conftest$EXEEXT $LDDPOSTPROC") | grep '^libgmp\.so'`],
+ 	[gmp_so=none])
+ if test -z "$gmp_so"; then
+@@ -754,7 +757,10 @@ LIBS=$save_LIBS
+ save_LIBS=$LIBS
+ LIBS="$LIBS $NETTLE_LIBS"
+ AC_MSG_CHECKING([nettle soname])
+-AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
++AC_LINK_IFELSE([AC_LANG_PROGRAM([
++               #include <nettle/sha2.h>],[
++               struct sha256_ctx ctx;
++               sha256_init(&ctx);])],
+ 	[nettle_so=`(eval "$LDDPROG conftest$EXEEXT $LDDPOSTPROC") | grep '^libnettle\.so'`],
+ 	[nettle_so=none])
+ if test -z "$nettle_so"; then
+@@ -767,7 +773,10 @@ LIBS=$save_LIBS
+ save_LIBS=$LIBS
+ LIBS="$LIBS $HOGWEED_LIBS"
+ AC_MSG_CHECKING([hogweed soname])
+-AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
++AC_LINK_IFELSE([AC_LANG_PROGRAM([
++               #include <nettle/rsa.h>],[
++               struct rsa_private_key priv;
++               nettle_rsa_private_key_init(&priv);])],
+ 	[hogweed_so=`(eval "$LDDPROG conftest$EXEEXT $LDDPOSTPROC") | grep '^libhogweed\.so'`],
+ 	[hogweed_so=none])
+ if test -z "$hogweed_so"; then
+-- 
+2.25.4
+

gnutls.spec

@@ -4,6 +4,7 @@ Release: 2%{?dist}
 Patch1:	gnutls-3.6.7-no-now-guile.patch
 Patch2:	gnutls-3.2.7-rpath.patch
 Patch3:	gnutls-3.6.14-fix-iovec-memory-leak.patch
+Patch4:	gnutls-3.6.14-configure-fix-soname-detection.patch
 %bcond_without dane
 %if 0%{?rhel}
 %bcond_with guile
@@ -281,6 +282,7 @@ make check %{?_smp_mflags} GNUTLS_SYSTEM_PRIORITY_FILE=/dev/null
 %changelog
 * Tue Jun 09 2020 Anderson Sasaki <ansasaki@redhat.com> - 3.6.14-2
 - Fix memory leak when serializing iovec_t (#1845083)
+- Fix automatic libraries sonames detection (#1845806)
 
 * Thu Jun  4 2020 Daiki Ueno <dueno@redhat.com> - 3.6.14-1
 - Update to upstream 3.6.14 release