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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
Source/Modules/main.cxx
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@ -41,8 +41,9 @@ extern "C" {
int UseWrapperSuffix = 0; // If 1, append suffix to non-overloaded functions too.
}
/* Suppress warning messages for private inheritance, preprocessor evaluation etc...
WARN_PP_EVALUATION 202
/* Suppress warning messages for private inheritance, etc by default.
These are enabled by command line option -Wextra.
WARN_PARSE_PRIVATE_INHERIT 309
WARN_PARSE_BUILTIN_NAME 321
WARN_PARSE_REDUNDANT 322
@ -50,7 +51,7 @@ extern "C" {
WARN_TYPE_RVALUE_REF_QUALIFIER_IGNORED 405
WARN_LANG_OVERLOAD_CONST 512
*/
#define EXTRA_WARNINGS "202,309,403,405,512,321,322"
#define EXTRA_WARNINGS "309,403,405,512,321,322"
extern "C" {
extern String *ModuleName;