Trac #34665: openssl spkg-configure.m4: Also require openssl if curl …

…needs to be built

Seen in `opensuse-15.3-gcc_11-python3.9`:
https://github.com/mkoeppe/sage/actions/runs/3251926884/jobs/5344443553
{{{
  [curl-7.84.0]   checking for openssl options with pkg-config... no
  [curl-7.84.0]   checking for HMAC_Update in -lcrypto... no
  [curl-7.84.0]   checking for HMAC_Init_ex in -lcrypto... no
  [curl-7.84.0]   checking OpenSSL linking with -ldl... no
  [curl-7.84.0]   checking OpenSSL linking with -ldl and -lpthread... no
  [curl-7.84.0]   configure: OPT_OPENSSL: yes
  [curl-7.84.0]   configure: OPENSSL_ENABLED:
  [curl-7.84.0]   configure: error: --with-openssl was given but OpenSSL
could not be detected
  [curl-7.84.0]   ******************************************************
**************************
}}}

URL: https://trac.sagemath.org/34665
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Dima Pasechnik

build/pkgs/openssl/spkg-configure.m4

@@ -56,9 +56,10 @@ On Cygwin, openssl must be installed as a system package. This is an error."])
                          ])
 ], [dnl REQUIRED-CHECK
   AC_REQUIRE([SAGE_SPKG_CONFIGURE_PYTHON3])
-  dnl openssl is a dependency only of python3; so if we use system python3,
+  AC_REQUIRE([SAGE_SPKG_CONFIGURE_CURL])
+  dnl openssl is a dependency only of python3 and curl; so if we use system python3 and curl,
   dnl we do not require it. (In particular, we do not need a specific version.)
-  AS_IF([test x$sage_spkg_install_python3 = xno], [
+  AS_IF([test x$sage_spkg_install_python3 = xno -a x$sage_spkg_install_curl = xno], [
     sage_require_openssl=no
   ])
 ])