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-DFOO on the SWIG command line now sets FOO to 1

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This is consistent with C/C++ compiler preprocessors.  Previously
SWIG set FOO to an empty value.

Fixes #2193
This commit is contained in:
Olly Betts 2022-02-06 10:18:49 +13:00
commit b06ab566cb
4 changed files with 18 additions and 1 deletions
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5
Source/Modules/main.cxx
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@ -477,7 +477,10 @@ static void getoptions(int argc, char *argv[]) {
Swig_mark_arg(i);
} else if (strncmp(argv[i], "-D", 2) == 0) {
String *d = NewString(argv[i] + 2);
Replace(d, "=", " ", DOH_REPLACE_FIRST);
if (Replace(d, "=", " ", DOH_REPLACE_FIRST) == 0) {
// Match C preprocessor behaviour whereby -DFOO sets FOO=1.
Append(d, " 1");
}
Preprocessor_define((DOH *) d, 0);
Delete(d);
// Create a symbol