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From 8012ca9c8d16f99679c171b36ad02655549ab7ff Mon Sep 17 00:00:00 2001
From: Alex Chernyakhovsky <alex@achernya.com>
Date: Sun, 30 Jul 2023 16:19:46 -0400
Subject: [PATCH] Bump C++ version to C++17
Protobuf versions since 3.6.0 have long had a C++11 dependency; even
more recent versions have picked up an Abseil dependency bumping that
to C++14. Since it is now 2023, defaulting to C++17 is reasonable, so
remove the conditional C++ standards version check that mosh
previously had and replace it with an unconditional C++17 check.
This means that all future commits can use C++17 features. According
to https://en.cppreference.com/w/cpp/compiler_support/17 this means
that minimum effective compiler versions for mosh become:
gcc 7 (May 2017)
clang 5 (September 2017)
This, in turn, implies that future versions of mosh will no longer be
available for RHEL/CentOS 7 (June 2014).
Closes: #1267
---
configure.ac | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/configure.ac b/configure.ac
index ee70c7b86..7f7dc3bc2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,9 +22,9 @@ AS_IF([test x"$PROTOC" = x],
# automake 1.12 seems to require this, but automake 1.11 doesn't recognize it
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
-# Protobuf 3.6+ requires C++11.
-AS_IF([pkg-config --atleast-version 3.6.0 protobuf],
- [AX_CXX_COMPILE_STDCXX([11])])
+# Protobuf transitively requires at least C++14, get ahead of the
+# curve and require at least C++17.
+AX_CXX_COMPILE_STDCXX([17])
WARNING_CXXFLAGS=""
PICKY_CXXFLAGS=""
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