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Sort out predefined SWIG-specific macros

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Ensure that SWIG_VERSION is defined both at SWIG-time and in the
generated C/C++ wrapper code (it was only defined in the wrapper
for some target languages previously).

SWIGGO and SWIGJAVASCRIPT are now defined in the generated wrappers
to match behaviour for all other target languages.

Stop defining SWIGVERSION in the wrapper.  This only happened as a
side-effect of how SWIG_VERSION was defined but was never documented and
is redundant.

The new testcase also checks that SWIG is defined at SWIG-time but not
in the generated wrapper, and that exactly one of a list of
target-language specific macros is defined.

Fixes #1050
This commit is contained in:
Olly Betts 2022-07-20 15:05:21 +12:00
commit 4ac3c87a29
18 changed files with 128 additions and 9 deletions
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@ -7,6 +7,17 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
Version 4.1.0 (in progress)
===========================
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
where possible because that results in smaller generated wrapper
sources.
SWIGGO and SWIGJAVASCRIPT are now defined in the generated wrappers
to match behaviour for all other target languages.
The undocumented SWIGVERSION macro is no longer defined.
2022-09-29: olly
#2303 SWIG's internal hash tables now use a better hash function.