From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 28 Jan 2026 10:27:07 +0000 (+0000)
Subject: libstdc++: Default to C++20 in src/experimental/Makefile.am
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=833cbd870f05e0d7fa38cb5cf60a9effea6582bb;p=thirdparty%2Fgcc.git

libstdc++: Default to C++20 in src/experimental/Makefile.am

r16-7089-gfbde291af66e02 had a stray change to the Makefile.in but
actually we probably should change that directory to use C++20, now that
it's the default. So this updates the Makefile.am, and the Makefile.in
doesn't need to be regenerated now.

libstdc++-v3/ChangeLog:

	* src/experimental/Makefile.am: Change AM_CXXFLAGS to use C++20
	by default.
---

diff --git a/libstdc++-v3/src/experimental/Makefile.am b/libstdc++-v3/src/experimental/Makefile.am
index e428aef23c0..bad10b40e21 100644
--- a/libstdc++-v3/src/experimental/Makefile.am
+++ b/libstdc++-v3/src/experimental/Makefile.am
@@ -67,7 +67,7 @@ libstdc__exp_la_DEPENDENCIES = \
 # OPTIMIZE_CXXFLAGS on the compile line so that -O2 can be overridden
 # as the occasion calls for it.
 AM_CXXFLAGS = \
-	-std=gnu++17 -nostdinc++ \
+	-std=gnu++20 -nostdinc++ \
 	$(glibcxx_lt_pic_flag) $(glibcxx_compiler_shared_flag) \
 	$(XTEMPLATE_FLAGS) $(VTV_CXXFLAGS) \
 	$(WARN_CXXFLAGS) $(OPTIMIZE_CXXFLAGS) $(CONFIG_CXXFLAGS) \