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...Makeconf via a > programmatic way via some sort of option or alike. I think this is about the following line in debian/rules: optimflags = `DEB_BUILD_MAINT_OPTIONS=optimize=-lto dpkg-buildflags --get CFLAGS` https://sources.debian.org/src/r-base/4.4.0-2/debian/rules/#L101 ...which later propagares to cxxflags = $(optimflags) and eventually CXXFLAGS="$(cxxflags)" ... ./configure. On Sid, dpkg-buildflags --get CFLAGS includes -Werror=implicit-function-declaration, which g++ doesn't like: root at 020af1fe3ba2:/# g++ -Werror=implicit-function-declaration -c ex.cpp cc1plus: warn...

On 21 May 2024 at 13:01, Jeroen Ooms wrote: | Compiling packages with C++ code using the default r-base-dev | configuration on debian:sid shows a lot of: | | cc1plus: warning: '-Werror=' argument | '-Werror=implicit-function-declaration' is not valid for C++ | | Can this flag be removed from R CMD config CXXFLAGS? "No." That was quoting Simon Urbanek from a few

...Without having looked in much detail, I guess foer the CXXFLAGS we want dpkg-buildflags --get CXXFLAGS? Best -k > optimflags = `DEB_BUILD_MAINT_OPTIONS=optimize=-lto dpkg-buildflags --get CFLAGS` > https://sources.debian.org/src/r-base/4.4.0-2/debian/rules/#L101 > ...which later propagares to cxxflags = $(optimflags) and > eventually CXXFLAGS="$(cxxflags)" ... ./configure. > On Sid, dpkg-buildflags --get CFLAGS includes > -Werror=implicit-function-declaration, which g++ doesn't like: > root at 020af1fe3ba2:/# g++ -Werror=implicit-function-declaration -c...