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bpo-45723: Add helpers for save/restore env (GH-29637) - #29637
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erlend-aasland
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Nov 19, 2021
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@tiran: there might be a smoother way to do this, but this should do the trick. |
PoC: Apply to SQLite check.
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November 19, 2021 15:38
erlend-aasland
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Nov 19, 2021
ContributorAuthor
Another option is to patch the built-in macros, but I prefer this explicit approach. |
erlend-aasland
commented
Nov 19, 2021
ContributorAuthor
Possible improvement: minimise future Proposed patchdiff --git a/configure.ac b/configure.ac
index 02463ae717..90507e206b 100644
--- a/configure.ac+++ b/configure.ac@@ -32,21 +32,21 @@ dnl - WITH_SAVE_ENV([SCRIPT]) Runs SCRIPT wrapped with SAVE_ENV/RESTORE_ENV
AC_DEFUN([_SAVE_VAR], [AS_VAR_COPY([save_][$1], [$1])])dnl
AC_DEFUN([_RESTORE_VAR], [AS_VAR_COPY([$1], [save_][$1])])dnl
AC_DEFUN([SAVE_ENV],
- [_SAVE_VAR([CFLAGS])]- [_SAVE_VAR([CPPFLAGS])]- [_SAVE_VAR([LDFLAGS])]- [_SAVE_VAR([LIBS])]+[_SAVE_VAR([CFLAGS])]+[_SAVE_VAR([CPPFLAGS])]+[_SAVE_VAR([LDFLAGS])]+[_SAVE_VAR([LIBS])]
)dnl
AC_DEFUN([RESTORE_ENV],
- [_RESTORE_VAR([CFLAGS])]- [_RESTORE_VAR([CPPFLAGS])]- [_RESTORE_VAR([LDFLAGS])]- [_RESTORE_VAR([LIBS])]+[_RESTORE_VAR([CFLAGS])]+[_RESTORE_VAR([CPPFLAGS])]+[_RESTORE_VAR([LDFLAGS])]+[_RESTORE_VAR([LIBS])]
)dnl
AC_DEFUN([WITH_SAVE_ENV],
- [SAVE_ENV]- [$1]- [RESTORE_ENV]+[SAVE_ENV]+m4_strip([$1])+[RESTORE_ENV]
)dnl
AC_SUBST(BASECPPFLAGS) |
tiran
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Nov 19, 2021
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| [_SAVE_VAR([CFLAGS])] | ||
| [_SAVE_VAR([CPPFLAGS])] | ||
| [_SAVE_VAR([LDFLAGS])] | ||
| [_SAVE_VAR([LIBS])] |
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It looks like the indention adds some extra space to the output:
save_CFLAGS=$CFLAGS
save_CPPFLAGS=$CPPFLAGS
save_LDFLAGS=$LDFLAGS
save_LIBS=$LIBS
ContributorAuthor
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Yeah. We can tweak the new macros to further minimise configure diffs. I think that could be worth it, as it would be easier to review future PRs.
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https://bugs.python.org/issue45723