File extra-symver.diff of Package libressl

From: Jan Engelhardt <jengelh@inai.de>
Date: 2017-12-04 21:25:11.022534627 +0100

Add symbol versions into the library to be on par with openssl.
---
 crypto/Makefile.am |    6 +++++-
 ssl/Makefile.am    |    6 +++++-
 tls/Makefile.am    |    6 +++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

Index: libressl-2.6.3/crypto/Makefile.am
===================================================================
--- libressl-2.6.3.orig/crypto/Makefile.am
+++ libressl-2.6.3/crypto/Makefile.am
@@ -92,7 +92,11 @@ if HOST_WIN
 	-mv crypto_portable.sym.tmp crypto_portable.sym
 endif
 
-libcrypto_la_LDFLAGS = -version-info @LIBCRYPTO_VERSION@ -no-undefined -export-symbols crypto_portable.sym
+crypto2.sym: crypto_portable.sym
+	(echo 'LIBRESSL { global: '; sed -e 's/\(.*\)/\1;/' <$<; echo 'local: *; };') >$@
+
+libcrypto_la_DEPENDENCIES = crypto2.sym libcompat.la
+libcrypto_la_LDFLAGS = -version-info @LIBCRYPTO_VERSION@ -no-undefined -Wl,--version-script=crypto2.sym
 libcrypto_la_LIBADD = libcompat.la
 if !HAVE_EXPLICIT_BZERO
 libcrypto_la_LIBADD += libcompatnoopt.la
Index: libressl-2.6.3/ssl/Makefile.am
===================================================================
--- libressl-2.6.3.orig/ssl/Makefile.am
+++ libressl-2.6.3/ssl/Makefile.am
@@ -6,7 +6,11 @@ EXTRA_DIST = VERSION
 EXTRA_DIST += CMakeLists.txt
 EXTRA_DIST += ssl.sym
 
-libssl_la_LDFLAGS = -version-info @LIBSSL_VERSION@ -no-undefined -export-symbols $(top_srcdir)/ssl/ssl.sym
+ssl2.sym: ssl.sym
+	(echo 'LIBRESSL { global: '; sed -e 's/\(.*\)/\1;/' <$<; echo 'local: *; };') >$@
+
+libssl_la_DEPENDENCIES = ssl2.sym
+libssl_la_LDFLAGS = -version-info @LIBSSL_VERSION@ -no-undefined -Wl,--version-script=ssl2.sym
 libssl_la_LIBADD = $(abs_top_builddir)/crypto/libcrypto.la
 
 libssl_la_SOURCES = bio_ssl.c
Index: libressl-2.6.3/tls/Makefile.am
===================================================================
--- libressl-2.6.3.orig/tls/Makefile.am
+++ libressl-2.6.3/tls/Makefile.am
@@ -6,7 +6,11 @@ EXTRA_DIST = VERSION
 EXTRA_DIST += CMakeLists.txt
 EXTRA_DIST += tls.sym
 
-libtls_la_LDFLAGS = -version-info @LIBTLS_VERSION@ -no-undefined -export-symbols $(top_srcdir)/tls/tls.sym
+tls2.sym: tls.sym
+	(echo 'LIBRESSL { global: '; sed -e 's/\(.*\)/\1;/' <$<; echo 'local: *; };') >$@
+
+libtls_la_DEPENDENCIES = tls2.sym
+libtls_la_LDFLAGS = -version-info @LIBTLS_VERSION@ -no-undefined -Wl,--version-script=tls2.sym
 libtls_la_LIBADD = $(abs_top_builddir)/ssl/libssl.la
 libtls_la_LIBADD += $(abs_top_builddir)/crypto/libcrypto.la
 libtls_la_LIBADD += $(PLATFORM_LDADD)