I am working on a revision of my Iso package (which hasn't been revised
for quite a while) and have added in registration of Fortran routines
that are called directly by .Fortran() in R functions.
When I do
R CMD check --as-cran Iso_0.0-18.tar.gz
I get a "NOTE":
Compilation used the following non-portable flag(s):
‘-Wdate-time’ ‘-Werror=format-security’ ‘-Wformat’
After experimenting with building a *.so file directly using SHLIB I
discerned that the problem appears to arise from the compilation of the
init.c file that I placed in "src" to effect the routine registration:
gcc -std=gnu99 -I"/usr/share/R/include" -DNDEBUG -fpic -g -O2
-fdebug-prefix-map=/build/r-base-VAQCff/r-base-3.6.0=.
-fstack-protector-strong -Wformat -Werror=format-security -Wdate-time
-D_FORTIFY_SOURCE=2 -g -c init.c -o init.o
I presume that I should do something about this note. (Non-portability
is indeed an egregious sin.) How can I tell gcc not to use these flags?
Note that the NOTE does not arise unless I use the "--as-cran" flag.
Thanks for any insight.
cheers,
Rolf Turner
P.S. I am running Ubuntu 18.04. Happy to supply any further details
that might be relevant.
R. T.
--
Honorary Research Fellow
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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