On Wed, 20 Jun 2018, Daniel Richard G. wrote:
> Note that Autoconf is not setting the variables to zero when the headers
> are not found. On an old FreeBSD system here, for example, the generated
> pcre2.h contains
>
> #define PCRE2_HAVE_STDINT_H
> #define PCRE2_HAVE_INTTYPES_H 1
>
> The first one will be assumed to be zero in preprocessor expressions,
> but not without producing a warning with -Wundef.
What's the best way to solve that? Does
#if defined(PCRE2_HAVE_STDINT_H) && PCRE2_HAVE_STDINT_H != 1
or
#if defined(PCRE2_HAVE_STDINT_H) && PCRE2_HAVE_STDINT_H
do any better? There must be some way to test for that without causing a
warning.
Philip
--
Philip Hazel
