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view modules/postgresql/configure.ac @ 5566:4654c01af32b
Improve the implementation, documentation of #'labels, #'flet.
lisp/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* bytecomp.el:
* bytecomp.el (for-effect): Move this earlier in the file, it's
referenced in byte-compile-initial-macro-environment.
* bytecomp.el (byte-compile-initial-macro-environment):
In the byte-compile-macro-environment definition for #'labels, put
off the compiling the lambda bodies until the point where the rest
of the form is being compiled, allowing the lambda bodies to
access appropriate values for byte-compile-bound-variables, and
reducing excessive warning about free variables.
Add a byte-compile-macro-environment definition for #'flet. This
modifies byte-compile-function-environment appropriately, and
warns about bindings of functions that have macro definitions in
the current environment, about functions that have byte codes, and
about functions that have byte-compile methods (which may not do
what the user wants at runtime).
* bytecomp.el (byte-compile-funcall):
If FUNCTION is constant, call #'byte-compile-callargs-warn if
that's appropriate, giving warnings about problems with calling
functions bound with #'labels.
* cl-macs.el:
* cl-macs.el (flet):
Mention the main difference from Common Lisp, that the bindings
are dynamic, not lexical. Counsel the use of #'labels, not #'flet,
for this and other reasons. Explain the limited single use case for
#'flet. Cross-reference to bytecomp.el in a comment.
* cl-macs.el (labels):
Go into detail on which functions may be called from
where. Explain how to access the function definition of a label
within FORM. Add a comment cross-referencing to bytecomp.el.
man/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* cl.texi (Function Bindings):
Move #'labels first, describe it in more detail, explaining that
it is to be preferred over #'flet, and explaining why.
Explain that dynamic bindings with #'flet will also not work when
functions are accessed through their bytecodes.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Wed, 07 Sep 2011 16:26:45 +0100 |
| parents | 56b64a055043 |
| children | b2709239b1f6 |
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# Process this file with autoconf to produce a configure script. # This is only used for independent module building. AC_INIT([PostgreSQL module], [1.0], [xemacs-beta@xemacs.org]) AC_PREREQ(2.53) AC_REVISION($Revision: 1.2 $) AC_COPYRIGHT([Configuration script for the PostgreSQL module. Copyright (C) 2002 Jerry James. This file is part of XEmacs. XEmacs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. XEmacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs. If not, see <http://www.gnu.org/licenses/>.]) AC_CONFIG_SRCDIR([postgresql.c]) m4_include([../common/configure-pre.ac]) dnl On many Linux systems, PostgreSQL is packaged to be installed in /usr; dnl in this case, configure will easily detect it there. dnl dnl If PostgreSQL is installed into a different prefix, dnl (such as the default /usr/local/pgsql when building from source), dnl then specify CPPFLAGS and LDFLAGS when configuring. dnl dnl Look for these standard header file locations, known to be used on Linux for header_dir in "" "pgsql/" "postgresql/"; do AC_CHECK_HEADER([${header_dir}libpq-fe.h], [libpq_fe_h_file=${header_dir}libpq-fe.h; break]) done test -z "$libpq_fe_h_file" && AS_ERROR([Cannot find the PostgresQL header files; try specifying CPPFLAGS.]) AC_DEFINE_UNQUOTED(LIBPQ_FE_H_FILE, "$libpq_fe_h_file") AC_CHECK_LIB(pq,PQconnectdb,, AS_ERROR([Cannot find the PostgresQL library. Try specifying LDFLAGS.])) AC_CHECK_LIB(pq,PQconnectStart, [ with_postgresqlv7=yes; AC_DEFINE(HAVE_POSTGRESQLV7)]) AC_SUBST(postgresql_libs, "$LIBS") m4_include([../common/configure-post.ac])