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Bump C++ version to C++17

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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
This commit is contained in:
Alex Chernyakhovsky
2023-07-30 16:19:46 -04:00
committed by Alex Chernyakhovsky
parent c16108f017
commit eee1a8cf41
1 changed files with 3 additions and 3 deletions
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configure.ac
+3 -3
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@@ -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 # automake 1.12 seems to require this, but automake 1.11 doesn't recognize it
m4_ifdef([AM_PROG_AR], [AM_PROG_AR]) m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
# Protobuf 3.6+ requires C++11. # Protobuf transitively requires at least C++14, get ahead of the
AS_IF([pkg-config --atleast-version 3.6.0 protobuf], # curve and require at least C++17.
[AX_CXX_COMPILE_STDCXX([11])]) AX_CXX_COMPILE_STDCXX([17])
WARNING_CXXFLAGS="" WARNING_CXXFLAGS=""
PICKY_CXXFLAGS="" PICKY_CXXFLAGS=""