A dropped datum is replaced by whatever follows it, but what follows
may be the end of the file or the paren closing the list we are
in. Hand the token back to the caller instead: read-list closes its
list with it and the toplevel loop stops.
A `;' comment between a guard and the form it guards was also taken for
the guarded datum, so the form stayed unconditional and the guard did
nothing. Skip comments when reading the guard.
comment-form? was defined three times over; it moves to utils.
<OpenGL/gl3.h> does not exist there and -framework is not a gcc flag,
so the documented build line failed with no hint why. #+macosx picks
the header now, and both build lines are in the file -- pkg-config
carries the flags on either platform, apart from Apple's GL framework,
which has no pkg-config file to carry.
'#+' and '#-' introduce conditional compilation: the form that follows
is kept only when the feature expression is true, and otherwise is read
and thrown away. An expression is a feature name, or and / or / not
of them.
They are read time, not compile time.
Default features are the host's software-version, software-type and
machine-type as CHICKEN reports them, plus what --features flag adds.
1. Look for `compilation', not `compile' among the source
2. Read the file with provided --features from the (compilation ...)
form, then handle resulting file to sexc
compile-to-file returned process-wait's values and main dropped them,
so cc errors were printed, but then main compiler exited 0.
Also cleanup tmp C files when compilation failed.
Implement pub support for enums, and also anonymous enums declared
in-place.
Also give the cdr of a `pub' form the form's own location, so a
error about what follows `pub' can say where it was written
For source-level debug. Add --line-directives option, defaulted to
statement. Disabled when used with -C. Explicit non-none value
overrides disabling when -C is present
Prior to the fix, the Sex code
`(while (!= EOF (= c (getc f))) ...)` expanded wrongly to
`while (EOF != c = getc(f)) { ...`, instead of
`while (EOF != (c = getc(f))) { ...`
Also rename macros to sex-macros, module-system to sex-modules for
clarity, uniformity, and to avoid name clashes with Chicken's
units/modules named "macros" and "modules"
