configure.ng: use pkg-config to find PpenSSL dependencies

OpenSSL can depends on lz or latomic so use pkg-config to find those
dependencies and fallback to existing mechanism.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Closes #256.

diff --git a/configure.ng b/configure.ng
index 57ae8bb8e66d1aba58cb84ac0fd136c4b2558fe1..899d00f762eb4e957bef2d6268691acbe0d4eccb 100644 (file)
--- a/configure.ng
+++ b/configure.ng
@@ -464,8 +464,11 @@ AC_ARG_WITH(openssl,
                                CPPFLAGS="-I$withval/include $CPPFLAGS"
                                LDFLAGS="-L$withval/lib $LDFLAGS"
                        fi
-                       AC_CHECK_LIB(crypto, BIO_s_mem)
-                       AC_CHECK_LIB(ssl, SSL_new)
+                       PKG_CHECK_MODULES([OPENSSL], [libssl libcrypto],
+                               [LIBS="$LIBS $OPENSSL_LIBS" CFLAGS="$CFLAGS $OPENSSL_CFLAGS"],
+                               [AC_CHECK_LIB(crypto, BIO_s_mem)
+                               AC_CHECK_LIB(ssl, SSL_new)]
+                       )
                        AC_CHECK_FUNCS(SSL_new, x_ssl_openssl=yes,
                                AC_MSG_ERROR([Can't enable openssl])
                        )