Suppress the compiler's conversion of statically obvious arity errors
to an expression that reports a custom error with the an S-expression,
since that interferes with Rumble's normalization of error messages.
If `struct dirent` has `namlen` field, define `HAVE_DIRENT_NAMLEN`.
If the field is instead `namelen`, define `HAVE_DIRENT_NAMELEN` (case of QNX).
Use this checks in `rktio_fs.c` and simplify `platform.h`.
Fix many incorrect arity declarations and actual arities in Racket CS,
and fix several incorrect arities in traditional Racket. Building
Racket CS now checks the information in "racket/src/cs/primitives"
against both Racket variants to make sure that they're all consistent.
Closes#2924
Racket CS did not support the optional second argument for
`continuation-prompt-available?`. Traditional racket did not produce a
sensible result for the prompt tag that is used to delimit a
composable continuation or in some cases for the default continuation
prompt tag.
configure scripts look for and read a local configuration file given by the
environment variable CONFIG_SITE. This can set variables such as prefix.
Racket’s build system was assuming that prefix would be set to NONE unless a
--prefix command line argument was given. But it could be set by a
CONFIG_SITE configuration file instead.
Hence, for in-place build add an explicit --disable-useprefix option, to
cause any prefix setting to be ignored, and use that in the top-level
Makefile.
Regenerate the configure scripts to get the updated code.
Revert the part of 39a96dd699 that hides the provenance of these
accessors. Although exposing the fact that the predicates are for
structure properties constrains some internal representations, that
constraint seems unlikely to matter, and exposing the procedures as
property predicates is more consistent with the documentation and the
implementation (especially for Racket CS).
Closes#2904
Improve gcc detection in configure script
We have been detecting gcc by the CC variable but this fails under
ubuntu for example where you might specify CC='gcc-8' to ./configure.
Also consider clang impersonator to be gcc.
Related to #2890
Support continuation-mark inspection proportional to the amount that
needs to be inspected, instead of having to build a list of length
propotional to the size of a continuation.
In Racket CS, use iteration to improve exception-handling chaining.
Traditional Racket already used similar functonality internally.
