diff --git a/configure.ac b/configure.ac index 94d01dc..fa024b6 100644 --- a/configure.ac +++ b/configure.ac @@ -76,12 +76,26 @@ AC_ARG_ENABLE([protoc], if test "x$enable_protoc" != "xno"; then AC_LANG_PUSH([C++]) - AX_CXX_COMPILE_STDCXX(11, noext, mandatory) - - PKG_CHECK_MODULES([protobuf], [protobuf >= 3.0.0], - [proto3_supported=yes], - [PKG_CHECK_MODULES([protobuf], [protobuf >= 2.6.0])] - ) + # PKG_CHECK_MODULES(prefix, list-of-modules, action-if-found, action-if-not-found) + PKG_CHECK_MODULES( + [protobuf], + [protobuf >= 4.22.0], + [ + proto3_supported=yes + AX_CXX_COMPILE_STDCXX(17, noext, mandatory) + ], + [ + PKG_CHECK_MODULES( + [protobuf], + [protobuf >= 3.0.0], + [ + proto3_supported=yes + AX_CXX_COMPILE_STDCXX(11, noext, mandatory) + ], + [ + PKG_CHECK_MODULES([protobuf], [protobuf >= 2.6.0]) + ]) + ]) save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$save_CPPFLAGS $protobuf_CFLAGS"