This script finds system OpenSSL despite I want it to use LibreSSL from /opt/libressl
Do not find it automatically -- we have set $LIBS and $PREFIX_OPENSSL
// mikhailnov, 25.12.2019

diff --git a/configure.ac b/configure.ac
index 39bdb5ef1..1f0b02dc2 100755
--- a/configure.ac
+++ b/configure.ac
@@ -1755,13 +1755,13 @@ if test -z "$ssl_backends" -o "x$OPT_SSL" != xno &&
   case "$OPT_SSL" in
   yes)
     dnl --with-ssl (without path) used
-    PKGTEST="yes"
+    PKGTEST="no"
     PREFIX_OPENSSL=/usr/local/ssl
     LIB_OPENSSL="$PREFIX_OPENSSL/lib$libsuff"
     ;;
   off)
     dnl no --with-ssl option given, just check default places
-    PKGTEST="yes"
+    PKGTEST="no"
     PREFIX_OPENSSL=
     ;;
   *)
diff --git a/libcurl.pc.in b/libcurl.pc.in
index 8ac15d407..19cb8e24d 100644
--- a/libcurl.pc.in
+++ b/libcurl.pc.in
@@ -34,6 +34,7 @@ Name: libcurl
 URL: https://curl.se/
 Description: Library to transfer files with ftp, http, etc.
 Version: @CURLVERSION@
-Libs: -L${libdir} -lcurl @LIBCURL_NO_SHARED@
-Libs.private: @LIBCURL_LIBS@
-Cflags: -I${includedir} @CPPFLAG_CURL_STATICLIB@
+Libs: -L${libdir} -lcurl @LIBCURL_NO_SHARED@ @LIBRESSL_LIBS@
+Libs.private: @LIBCURL_LIBS@ @LIBRESSL_LIBS_PRIVATE@
+Cflags: -I${includedir} @CPPFLAG_CURL_STATICLIB@ @LIBRESSL_CFLAGS@
+Requires.private: libressl