Search for gnutls if not found with pkg-config

autofiles.sums

@@ -1,4 +1,4 @@
-50057c548d9af98d7b070a8a7716352a777b1f52e7ba44719f94ede65fc27cee  configure.ac
+766d1c21521da343b30d5518198e211cad1a049150ba15afb8dcaeaa2664f470  configure.ac
 d3f9ee6f6f0846888d9a10fd3dad2e4b1258be84205426cf04d7cef02d61dad7  aclocal.m4
 2e4cd495837be1b8454a4d8aef541b000988634be89d9c05a9cf5de67dffef5e  libqpdf/qpdf/qpdf-config.h.in
 5297971a0ef90bcd5563eb3f7127a032bb76d3ae2af7258bf13479caf8983a60  m4/ax_cxx_compile_stdcxx.m4

configure

@@ -17717,6 +17717,74 @@ else
 $as_echo "yes" >&6; }
 	GNUTLS_FOUND=1
 fi
+if test "$GNUTLS_FOUND" = "0"; then
+  ac_fn_c_check_header_mongrel "$LINENO" "gnutls/gnutls.h" "ac_cv_header_gnutls_gnutls_h" "$ac_includes_default"
+if test "x$ac_cv_header_gnutls_gnutls_h" = xyes; then :
+  GNUTLS_FOUND=1
+else
+  GNUTLS_FOUND=0
+fi
+
+
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing gnutls_hash_init" >&5
+$as_echo_n "checking for library containing gnutls_hash_init... " >&6; }
+if ${ac_cv_search_gnutls_hash_init+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char gnutls_hash_init ();
+int
+main ()
+{
+return gnutls_hash_init ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' gnutls; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_gnutls_hash_init=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_gnutls_hash_init+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_gnutls_hash_init+:} false; then :
+
+else
+  ac_cv_search_gnutls_hash_init=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_gnutls_hash_init" >&5
+$as_echo "$ac_cv_search_gnutls_hash_init" >&6; }
+ac_res=$ac_cv_search_gnutls_hash_init
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+  GNUTLS_FOUND=1
+else
+  GNUTLS_FOUND=0
+fi
+
+fi
 
 IMPLICIT_GNUTLS=0
 USE_CRYPTO_GNUTLS=0

configure.ac

@@ -519,6 +519,10 @@ dnl gnutls is available. If the gnutls provider is explicitly
 dnl disabled, do not link with gnutls even if present.
 
 PKG_CHECK_MODULES([pc_gnutls], [gnutls], [GNUTLS_FOUND=1], [GNUTLS_FOUND=0])
+if test "$GNUTLS_FOUND" = "0"; then
+  AC_CHECK_HEADER(gnutls/gnutls.h,[GNUTLS_FOUND=1],[GNUTLS_FOUND=0])
+  AC_SEARCH_LIBS(gnutls_hash_init,gnutls,[GNUTLS_FOUND=1],[GNUTLS_FOUND=0])
+fi
 
 IMPLICIT_GNUTLS=0
 USE_CRYPTO_GNUTLS=0