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Report errors in preprocessor expressions by default

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Until now SWIG quietly ignored such errors unless -Wextra (or -Wall
which implies -Wextra) was passed, but this is unhelpful as it hides
problems.  To illustrate this point, enabling this warning by
default revealled a typo in the preproc_defined.i testcase in
SWIG's own testsuite.

If you really don't want to see this warning, you can suppress it
with command line option -w202 or by using this in your interface
file:

%warnfilter(SWIGWARN_PP_EVALUATION);

Both will work with older versions of SWIG too.

Fixes #1465
Fixes #2389
This commit is contained in:
Olly Betts 2022-10-05 13:23:49 +13:00
commit 06296a7128
7 changed files with 34 additions and 7 deletions
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@ -7,6 +7,23 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.1.0 (in progress)
===========================
2022-10-05: olly
#1465 Report errors in preprocessor expressions by default
Until now SWIG quietly ignored such errors unless -Wextra (or -Wall
which implies -Wextra) was passed, but this is unhelpful as it tends
to hide genuine problems. To illustrate this point, enabling this
warning by default revealed a typo in the preproc_defined.i
testcase in SWIG's own testsuite.
If you really don't want to see this warning, you can suppress it
with command line option -w202 or by using this in your interface
file:
%warnfilter(SWIGWARN_PP_EVALUATION);
Both will work with older versions of SWIG too.
2022-10-04: olly
#1050 Consistently define SWIG_VERSION both at SWIG-time and in
the generated wrapper. Best practice remains to check at SWIG-time