Hi again, I realised it is useful to replicate the warnings locally without relying on CRAN automatic check; instead of R(-devel) CMD check --as-cran package_version.tar.gz one can use
R CMD check --configure-args="" and in my case the WARNINGS were initially given with https://www.stats.ox.ac.uk/pub/bdr/gcc9/README.txt and those specification might as well used in --configure-args above. Besst regards, Jing Hua ________________________________ From: R-devel <r-devel-boun...@r-project.org> on behalf of jing hua zhao <jinghuaz...@hotmail.com> Sent: 29 May 2019 15:49 To: r-devel@r-project.org Subject: [Rd] use of buffers in sprintf and snprintf Dear R-developers, I am struggling with packaging with sprintf and snprintf() as the following WARNINGS from gcc 9.x, hap_c.c:380:46: warning: �%d� directive output may be truncated writing between 1 and 10 bytes into a region of size between 0 and 127 [-Wformat-truncation=] hap_c.c:392:46: warning: �%d� directive output may be truncated writing between 1 and 10 bytes into a region of size between 0 and 127 [-Wformat-truncation=] Essentially, I have #define MAX_FILENAME_LEN 128 char of1name[MAX_FILENAME_LEN],of2name[MAX_FILENAME_LEN], tempname[MAX_FILENAME_LEN]; ... snprintf(tempname,sizeof(tempname),"%s.%d", of1name, j); It looks I could get around with #define MAX_FILENAME_LEN 128 #define MAX_FILENAME_LEN2 256 char of1name[MAX_FILENAME_LEN],of2name[MAX_FILENAME_LEN], tempname[MAX_FILENAME_LEN2]; ... snprintf(tempname,2*sizeof(tempname)+1,"%s.%d", of1name, j) It looks a bit waste of resources to me. Any idea will be greatly appreciated, Jing Hua [[alternative HTML version deleted]] [[alternative HTML version deleted]] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel