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Configure and compile with C++17 on Ubuntu 22.04

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The packaged libsystemc on Ubuntu 22.04 uses C++17, so default to that
on that platform. Keep C++14 elsewhere.
This commit is contained in:
Geza Lore 2022-05-30 16:44:00 +01:00
parent 26b7452178
commit 606b35853b
1 changed files with 7 additions and 3 deletions
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10
configure.ac
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@ -348,14 +348,18 @@ AC_SUBST(CFG_CXXFLAGS_PROFILE)
# Flag to select newest language standard supported
# Macros work such that first option that passes is the one we take
# Currently enabled c++14 due to packaged SystemC dependency
# Currently enable c++17/c++14 due to packaged SystemC dependency
# c++14 is the newest that Verilator is regressed to support
# c++11 is the oldest that Verilator supports
# gnu is requried for Cygwin to compile verilated.h successfully
#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++20)
#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++20)
#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++17)
#_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++17)
case "$(which lsb_release 2>&1 > /dev/null && lsb_release -d)" in
*Ubuntu*22.04*)
_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++17)
_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++17)
;;
esac
_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++14)
_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=c++14)
_MY_CXX_CHECK_SET(CFG_CXXFLAGS_STD_NEWEST,-std=gnu++11)