On Sat, 15 Mar 2025 07:51:11 -0500
Dirk Eddelbuettel <[email protected]> wrote:
> /usr/local/lib/R-devel/lib/R/include/R_ext/Boolean.h:62:16: warning: ISO C
> does not support specifying ‘enum’ underlying types before C23 [-Wpedantic]
> 62 | typedef enum :int { FALSE = 0, TRUE } Rboolean; // so NOT NA
> A | ^
I think that the configure test [1] succeeds in non-C23 mode because
the test program compiles successfully (despite the warning), causing
the enum-related warning for any compilation units that include
R_ext/Boolean.h.
Since there may be no portable way to specify CFLAGS=-Werror for the
AC_RUN_IFELSE(...) test, perhaps the configure test should also test
for the reported C standard version? But that of course could also be
wrong...
--
Best regards,
Ivan
[1]
https://github.com/r-devel/r-svn/blob/886ba5f282a82d6f327211b08b4fa502641c7ef8/m4/R.m4#L5442-L5459
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