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mirror of https://github.com/sqlite/sqlite.git synced 2024-11-21 19:29:09 +01:00

When constructing the auto-reconfigure commands, only quote args which look like they need it. Minor doc updates.

FossilOrigin-Name: d4fbd34f7a4b0e6179cb06114d148fbc5d30b8dc8db0b764f4347dd50ff591ba
This commit is contained in:
stephan 2024-11-06 07:20:20 +00:00
parent ebb3e03b6d
commit 6da414ef41
4 changed files with 62 additions and 48 deletions

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@ -1,4 +1,4 @@
#/usr/bin/tclsh
#/do/not/tclsh
# ^^^ help out editors which guess this file's content type.
#
# This is the main autosetup-compatible configure script for the
@ -227,15 +227,25 @@ msg-result "Source dir = $srcdir"
msg-result "Build dir = $::autosetup(builddir)"
msg-result "Configuring SQLite version $PACKAGE_VERSION"
#
# SQLITE_AUTORECONFIG contains make target rules for re-running the
# configure script with the same arguments it was initially invoked
# with. This can be used to automatically reconfigure
#
define-append SQLITE_AUTORECONFIG cd '$::autosetup(builddir)' && '$srcdir/configure'
#{*}$::autosetup(argv) breaks with --flag='val with spaces', so...
foreach arg $::autosetup(argv) {
define-append SQLITE_AUTORECONFIG '$arg'
if {1} {
#
# SQLITE_AUTORECONFIG contains make target rules for re-running the
# configure script with the same arguments it was initially invoked
# with. This can be used to automatically reconfigure
#
proc squote {arg} {
# Wrap $arg in single-quotes if it looks like it might need that
# to avoid mis-handling as a shell argument. We assume that $arg
# will never contain any single-quote characters.
if {[string match {*[ &;$*"]*} $arg]} { return '$arg' }
return $arg
}
define-append SQLITE_AUTORECONFIG cd [squote $::autosetup(builddir)] && [squote $srcdir/configure]
#{*}$::autosetup(argv) breaks with --flag='val with spaces', so...
foreach arg $::autosetup(argv) {
define-append SQLITE_AUTORECONFIG [squote $arg]
}
rename squote ""
}
# Are we cross-compiling?

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@ -161,7 +161,7 @@ e.g. `CFLAGS` and `y` is the specific instance of that category,
e.g. `CFLAGS.readline`.
When the configure script exports flags for consumption by filtered
files, e.g. [`Makefile.in`](/file/Makefile.in) and the generated
files, e.g. [Makefile.in][] and the generated
`sqlite_cfg.h`, it does so in the more conventional `X_Y` form because
those flags get exported as as C `#define`s to `sqlite_cfg.h`, where
dots are not permitted.
@ -169,9 +169,8 @@ dots are not permitted.
The `X.y` convention is used in the makefiles primarily because the
person who did the initial port finds that considerably easier on the
eyes and fingers. In practice, the `X_Y` form of such exports is used
exactly once in `Makefile.in`, where it's translated into into `X.y`
form for consumption by `Makefile.in` and
[`main.mk`](/file/main.mk). For example:
exactly once in [Makefile.in][], where it's translated into into `X.y`
form for consumption by [Makefile.in][] and [main.mk][]. For example:
>
```
@ -185,37 +184,40 @@ Do Not Update Global Shared State
------------------------------------------------------------------------
In both the legacy Autotools-driven build and in common Autosetup
usage, feature tests performed by the configure script may ammend
values to global flags such as `CFLAGS`, `LDFLAGS`, and `LIBS`.
That's appropriate for a makefile which builds a single deliverable,
but less so for makefiles which produce multiple deliverables, as it's
unlikely that every single deliverable will require the same core set
of those flags. In addition, that approach can make it difficult to
determine the origin of any given change to those flags because those
changes are hidden behind voodoo performed outside the immediate
visibility of the configure script's maintainer. It can also force the
maintainers of the configure script to place tests in a specific order
so that the resulting flags get applied at the correct time.
usage, feature tests performed by the configure script may amend
global flags such as `CFLAGS`, `LDFLAGS`, and `LIBS`. That's
appropriate for a makefile which builds a single deliverable, less
so for makefiles which produce multiple deliverables. Drawbacks
of that approach include:
> A real-life example of the latter point: before the approach
described below was taken to collecting build-time flags, the test
for `-rpath` had to come _after_ the test for zlib because the
results of the `-rpath` test implicitly modified the `CFLAGS`,
breaking the zlib feature test. Because the feature tests no longer
(intentionally) modify global state, that is not an issue.
- It's unlikely that every single deliverable will require the same
core set of those flags.
- It can be difficult to determine the origin of any given change to
that global state because those changes are hidden behind voodoo performed
outside the immediate visibility of the configure script's
maintainer.
- It can force the maintainers of the configure script to place tests
in a specific order so that the resulting flags get applied at
the correct time.\
(A real-life example: before the approach described below was taken
to collecting build-time flags, the test for `-rpath` had to come
_after_ the test for zlib because the results of the `-rpath` test
implicitly modified the `CFLAGS`, breaking the zlib feature
test. Because the feature tests no longer (intentionally) modify
global state, that is not an issue.)
Cases where feature tests modify global state in such a way that it
may impact later feature tests are either (A) very intentionally
defined to do so (e.g. the `--with-wasi-sdk` flag needs to modify the
build tool chain) or (B) are oversights (i.e. bugs).
In this build, cases where feature tests modify global state in such a
way that it may impact later feature tests are either (A) very
intentionally defined to do so (e.g. the `--with-wasi-sdk` has
invasive side-effects) or (B) are oversights (i.e. bugs).
This tree's configure script, utility APIs,
[`Makefile.in`](/file/Makefile.in), and [`main.mk`](/file/main.mk)
therefore strive to separate the results of any given feature test
into its own well-defined variables. For example:
This tree's [configure script][auto.def], [utility APIs][proj.tcl],
[Makefile.in][], and [main.mk][] therefore strive to separate the
results of any given feature test into its own well-defined
variables. For example:
- The linker flags for zlib are exported from the configure script as
`LDFLAGS_ZLIB`, which `Makefile.in` and `main.mk` then expose as
`LDFLAGS_ZLIB`, which [Makefile.in][] and [main.mk][] then expose as
`LDFLAGS.zlib`.
- `CFLAGS_READLINE` (a.k.a. `CFLAGS.readline`) contains the `CFLAGS`
needed for including `libreadline`, `libedit`, or `linenoise`, and
@ -267,4 +269,6 @@ configure process, and check it in.
[auto.def]: /file/auto.def
[autosetup-git]: https://github.com/msteveb/autosetup
[proj.tcl]: /file/autosetup/proj.tcl
[Makefile.in]: /file/Makefile.in
[main.mk]: /file/main.mk
[JimTCL]: https://jim.tcl.tk

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@ -1,5 +1,5 @@
C Minor\sdoc\stweaks\sand\stypo\sfixes.
D 2024-11-06T06:44:35.358
C When\sconstructing\sthe\sauto-reconfigure\scommands,\sonly\squote\sargs\swhich\slook\slike\sthey\sneed\sit.\sMinor\sdoc\supdates.
D 2024-11-06T07:20:20.567
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F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md c5b4009dca54d127d2d6033c22fd9cc34f53bedb6ef12c7cbaa468381c74ab28
@ -13,7 +13,7 @@ F art/icon-80x90.gif 65509ce3e5f86a9cd64fe7fca2d23954199f31fe44c1e09e208c80fb83d
F art/sqlite370.eps aa97a671332b432a54e1d74ff5e8775be34200c2
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F autoconf/Makefile.fallback 22fe523eb36dfce31e0f6349f782eb084e86a5620b2b0b4f84a2d6133f53f5ac
@ -37,7 +37,7 @@ F autoconf/tea/win/rules.vc 94a18c3e453535459b4a643983acca52fb8756e79055bd2ad4b0
F autoconf/tea/win/targets.vc 96a25a1fa6e9e9cfb348fd3760a5395b4ce8acafc8ed10f0412937ec200d5dbd
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@ -2200,8 +2200,8 @@ F tool/version-info.c 3b36468a90faf1bbd59c65fd0eb66522d9f941eedd364fabccd7227350
F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee87c1b31a7
F tool/warnings.sh 49a486c5069de041aedcbde4de178293e0463ae9918ecad7539eedf0ec77a139
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U stephan
Z de533e530a0ec603057ff86b4723ff1a
Z 3e647edf4dd8fa5473ff129830ab4868
# Remove this line to create a well-formed Fossil manifest.

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@ -1 +1 @@
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