On Nov 4 00:23, Pavel M via Cygwin wrote: > Observation: C standard library: standard headers may reserve non-standard > identifiers which don't begin with an underscore. > > Invocations: > $ echo -e "#include <limits.h>\n#define NL_NMAX" | gcc -xc - -std=c11 > -pedantic -Wall -Wextra -E > /dev/null > <stdin>:2: warning: "NL_NMAX" redefined > In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/limits.h:203, > from > /usr/lib/gcc/x86_64-pc-cygwin/11/include/syslimits.h:7, > from /usr/lib/gcc/x86_64-pc-cygwin/11/include/limits.h:34, > from <stdin>:1: > /usr/include/limits.h:507: note: this is the location of the previous > definition > 507 | #define NL_NMAX INT_MAX > > $ echo -e "#include <limits.h>\n#define PAGESIZE" | gcc -xc - -std=c11 > -pedantic -Wall -Wextra -E > /dev/null > <stdin>:2: warning: "PAGESIZE" redefined > In file included from /usr/lib/gcc/x86_64-pc-cygwin/11/include/limits.h:203, > from > /usr/lib/gcc/x86_64-pc-cygwin/11/include/syslimits.h:7, > from /usr/lib/gcc/x86_64-pc-cygwin/11/include/limits.h:34, > from <stdin>:1: > /usr/include/limits.h:220: note: this is the location of the previous > definition > 220 | #define PAGESIZE __PAGESIZE > > # and so on...
That's ok for limits.h, see https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/limits.h.html Some of the values also use feature test macros. Corinna -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
