[R-sig-Debian] Default CXXFLAGS

[Dirk Eddelbuettel]

On 21 May 2024 at 15:59, Ivan Krylov wrote:
| On Tue, 21 May 2024 14:48:48 +0200
| Kurt Hornik <Kurt.Hornik using wu.ac.at> wrote:
| 
| > I guess foer the CXXFLAGS we want dpkg-buildflags --get CXXFLAGS?

Good catch, and expansion, by both of you.

| It must be the case. It's both the documented option [1] and it
| currently differs from CFLAGS in the offending flag:
| 
| root using 93e09ba5b6fb:/# diff -u <(dpkg-buildflags --get CFLAGS | sed 's/ /\n/g') <(dpkg-buildflags --get CXXFLAGS | sed 's/ /\n/g')
| --- /dev/fd/63  2024-05-21 12:54:12.275778573 +0000
| +++ /dev/fd/62  2024-05-21 12:54:12.275778573 +0000
| @@ -1,6 +1,5 @@
|  -g
|  -O2
| --Werror=implicit-function-declaration
|  -ffile-prefix-map=/=.
|  -fstack-protector-strong
|  -fstack-clash-protection

Differently put using a Docker invocation away from my Ubuntu host to a
Debian setting:

$ docker run --rm -ti rocker/r-base dpkg-buildflags | egrep '^(CXXFLAGS|CFLAGS)'
CFLAGS=-g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
CFLAGS_FOR_BUILD=-g -O2
CXXFLAGS=-g -O2 -ffile-prefix-map=/=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection
CXXFLAGS_FOR_BUILD=-g -O2
$ 

So it looks like picking the CXXFLAGS will remove the unwanted -Werror=...

Thanks all -- I will make that change.

Dirk

PS Kurt, it would still be nice if you could let us 'sed-filter' or alike the defaults...

-- 
dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org