Index: aclocal/tcltls_openssl.m4
==================================================================
--- aclocal/tcltls_openssl.m4
+++ aclocal/tcltls_openssl.m4
@@ -20,10 +20,11 @@
 
 ])
 
 AC_DEFUN([TCLTLS_SSL_OPENSSL], [
 	openssldir=''
+	opensslpkgconfigdir=''
 	AC_ARG_WITH([ssl-dir],
 		AS_HELP_STRING(
 			[--with-ssl-dir=<dir>],
 			[deprecated, use --with-openssl-dir -- currently has the same meaning]
 		), [
@@ -35,10 +36,18 @@
 			[--with-openssl-dir=<dir>],
 			[path to root directory of OpenSSL or LibreSSL installation]
 		), [
 			openssldir="$withval"
 		]
+	)
+	AC_ARG_WITH([openssl-pkgconfig],
+		AS_HELP_STRING(
+			[--with-openssl-pkgconfig=<dir>],
+			[path to root directory of OpenSSL or LibreSSL pkgconfigdir]
+		), [
+			opensslpkgconfigdir="$withval"
+		]
 	)
 
 	if test -n "$openssldir"; then
 		if test -e "$openssldir/libssl.$SHOBJEXT"; then
 			TCLTLS_SSL_LIBS="-L$openssldir -lssl -lcrypto"
@@ -54,10 +63,21 @@
 	if test "$TCLEXT_BUILD" = "static" -o "$TCLEXT_TLS_STATIC_SSL" = 'yes'; then
 		pkgConfigExtraArgs='--static'
 	fi
 
 	dnl Use pkg-config to find the libraries
+	dnl Temporarily update PKG_CONFIG_PATH
+	PKG_CONFIG_PATH_SAVE="${PKG_CONFIG_PATH}"
+	if test -n "${opensslpkgconfigdir}"; then
+		if ! test -f "${opensslpkgconfigdir}/openssl.pc"; then
+			AC_MSG_ERROR([Unable to locate ${opensslpkgconfigdir}/openssl.pc])
+		fi
+
+		PKG_CONFIG_PATH="${opensslpkgconfigdir}${PATH_SEPARATOR}${PKG_CONFIG_PATH}"
+		export PKG_CONFIG_PATH
+	fi
+
 	AC_ARG_VAR([TCLTLS_SSL_LIBS], [libraries to pass to the linker for OpenSSL or LibreSSL])
 	AC_ARG_VAR([TCLTLS_SSL_CFLAGS], [C compiler flags for OpenSSL or LibreSSL])
 	AC_ARG_VAR([TCLTLS_SSL_CPPFLAGS], [C preprocessor flags for OpenSSL or LibreSSL])
 	if test -z "$TCLTLS_SSL_LIBS"; then
 		TCLTLS_SSL_LIBS="`"${PKGCONFIG}" openssl --libs $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
@@ -66,10 +86,11 @@
 		TCLTLS_SSL_CFLAGS="`"${PKGCONFIG}" openssl --cflags-only-other $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
 	fi
 	if test -z "$TCLTLS_SSL_CPPFLAGS"; then
 		TCLTLS_SSL_CPPFLAGS="`"${PKGCONFIG}" openssl --cflags-only-I $pkgConfigExtraArgs`" || AC_MSG_ERROR([Unable to get OpenSSL Configuration])
 	fi
+	PKG_CONFIG_PATH="${PKG_CONFIG_PATH_SAVE}"
 
 	if test "$TCLEXT_BUILD" = "static"; then
 		dnl If we are doing a static build, save the linker flags for other programs to consume
 		rm -f tcltls.a.linkadd
 		AS_ECHO(["$TCLTLS_SSL_LIBS"]) > tcltls.a.linkadd