duplicate" tests, close parent side of signalling pipe, to hopefully
generate an error instead of a hang if something bad in the child
means it doesn't write anything.
* configure.in: Test if need braces around PTHREAD_ONCE_INIT, set
AC_OUTPUT of SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT.
Need to set SCM_I_GSC_NEED_BRACES_ON_PTHREAD_ONCE_INIT to some value
always, not just when pthreads.
* debugging/trc.scm: New file.
* debugging/traps.scm: New file.
* debugging/trace.scm: New file.
* debugging/steps.scm: New file.
* debugging/load-hooks.scm: New file.
* debugging/ice-9-debugger-extensions.scm: New file.
* debugging/example-fns.scm: New file.
* debugging/breakpoints.scm: New file.
* debugging/Makefile.am: New.
* Makefile.am (SUBDIRS): Add debugging.
(Continue Execution): Improved doc for continue.
(Using Guile in Emacs): Lots of new docs about the Emacs
interface.
* api-debug.texi (Low Level Trap Calls): New.
(Using Traps): Removed, material incorporated into Low Level Trap
Calls.
(High Level Traps): New.
(Breakpoints): New.
* scheme-using.texi (Single Stepping): Improve doc for step and
next.
* api-debug.texi (Debug on Error): Note need to handling of errors
in C.
"Evaluation Model". Moved existing subsections "Capturing the
Stack or Innermost Stack Frame", "Examining the Stack", "Examining
Stack Frames", "Source Properties", "Decoding Memoized Source
Expressions" and "Starting a New Stack" under "Evaluation Model".
(Capturing the Stack or Innermost Stack Frame): Some new text, and
correction to doc for last-stack-frame.
(Debug on Error): Renamed from "Interactive Debugging".
(record-accessor, record-modifier): Use it for a strict type check of
the given record. Previously an accessor returned #f on a wrong
record type, and modifier silently did nothing.
Moved/merged to scheme-using.texi, as REPL features.
(Examples): New.
(Intro to Breakpoints): New introductory text here. Removed all
subnodes except for Breakpoints Overview.
* scheme-using.texi: New.
* guile.texi (Programming in Scheme): Include new
scheme-using.texi file.
* Makefile.am (guile_TEXINFOS): Include new scheme-using.texi
file.
