At least in OpenBSD, there is a libedit library in base, but without
public headers. Public headers for readline are available but since
15db5d36 (pcre2test: avoid using readline headers with libedit,
2022-04-07) won't be picked up automatically.
Allow pointing cmake to those headers by doing (for example):
$ cmake -DEDITLINE_INCLUDE_DIR=/usr/include/readline
Or using custom CPPFLAGS with configure (for example):
$ CPPFLAGS=-I/usr/include/readline ./configure --enable-pcre2test-libedit
Since the headers from readline.h would be otherwise incomplete, detect
that case and pull the extra headers that are required automagically and
while at it, cleanup the NCURSES dependency that was unnecessarily copied
from readline.
* pcre2test: use the right header for libedit in FreeBSD with autoconf
When `./configure --enable-pcre2test-libedit` is used in FreeBSD,
the resulting test will succeed but won't set the necessary flag
to distinguish between libedit and readline header files, therefore
using readline's at built time (if installed)
Consolidate all header tests into one and use instead the corresponding
autogenerated defines to check for each possibility.
* pcre2test: really allow libedit with cmake
Using cmake to configure and enable linking pcre2test with libedit,
could result in a broken build, because the header used was instead
pointing to readline.
In cases were the build will succeed (because both libraries were
available), it would likely show warnings, because several history
functions were being used without declarations, since readline
requires including "history.h" for those.
Additionally, since PCRE2_SUPPORT_READLINE is ON by default (unlike
configure), turning PCRE2_SUPPORT_LIBEDIT=ON, would require setting
that other option to OFF explicitly (even if readline wasn't available)
or the setup would abort.
Lastly, in systems with no default sysroot (ex: macOS), the use of
absolute paths for searching for libedit's readline.h could fail so
use instead relative PATH_SUFFIXES.
* pcre2test: avoid using readline headers with libedit
When asked to enable libedit in a system that ALSO has readline,
the headers of the former would be found and used by the earlier.
While that would mostly work, some functions will be missing
definitions (which is forbidden in C99), so instead abort the
configuration and let the user provide for them.
* test: avoid failing RunTest if pcre2test -S is not supported
If `pcre2test -S` is not supported then then avoid checking for it
in a test.
There is already a conditional check for it to be used when it is
needed and it is available, so adjust that as well.
* pcre2test: update list of platform support for -S
Minix 3 has a BSD userspace and now works fine, but Haiku still
doesn't support stack limits, so update accordingly.
Visual Studio 2013 includes support for %zu and %td, so let newer
versions of it avoid the fallback, and while at it, make sure that
the first check is for DISABLE_PERCENT_ZT so it will be always
honoured if chosen.
prtdiff_t is signed, so use a signed type instead, and make sure
that an appropiate width is chosen if pointers are 64bit wide.
Remove the need for the size_t cast and instead change the size
of the equivalent format identifier to avoid truncations.
Philip Hazel
Carlo Marcelo Arenas Belón