From: Marek Polacek <polacek@redhat.com>
Date: Wed, 11 Mar 2026 20:10:12 +0000 (-0400)
Subject: c++: require C++26 for -freflection [PR124447]
X-Git-Tag: basepoints/gcc-17~757
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=9bb200e71ccf9c923bd9c7bd546130446fd76e95;p=thirdparty%2Fgcc.git

c++: require C++26 for -freflection [PR124447]

-freflection is unusable without C++26 so let's not allow it.

	PR c++/124447

gcc/c-family/ChangeLog:

	* c-opts.cc (c_common_post_options): Error if -freflection is used
	without -std=c++26 or -std=gnu++26.

Reviewed-by: Jason Merrill <jason@redhat.com>
---

diff --git a/gcc/c-family/c-opts.cc b/gcc/c-family/c-opts.cc
index 1d14eeeb995..9fad71a1eb1 100644
--- a/gcc/c-family/c-opts.cc
+++ b/gcc/c-family/c-opts.cc
@@ -1265,6 +1265,10 @@ c_common_post_options (const char **pfilename)
   if (flag_immediate_escalation && cxx_dialect < cxx20)
     flag_immediate_escalation = 0;
 
+  if (flag_reflection && cxx_dialect < cxx26)
+    error ("%<-freflection%> only supported with %<-std=c++26%> or "
+	   "%<-std=gnu++26%>");
+
   if (num_in_fnames > 1)
     error ("too many filenames given; type %<%s %s%> for usage",
 	   progname, "--help");