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cmSystemTools: Fix unsetenv() fallback

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The fallback path boils down to putenv(). Calling that with a "=" sets the
variable to an empty string.
Use cmSystemTools::UnPutEnv() instead, which correctly handles unsetting
variables on a variety of systems.
This commit is contained in:
Raul Tambre
2022-06-24 21:21:17 +03:00
parent 324ca5b489
commit 8eb8d16c19
1 changed files with 1 additions and 2 deletions
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3
Source/cmSystemTools.cxx
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@@ -1501,8 +1501,7 @@ std::string cmSystemTools::RelativeIfUnder(std::string const& top,
bool cmSystemTools::UnsetEnv(const char* value) bool cmSystemTools::UnsetEnv(const char* value)
{ {
# if !defined(HAVE_UNSETENV) # if !defined(HAVE_UNSETENV)
std::string var = cmStrCat(value, '='); return cmSystemTools::UnPutEnv(value);
return cmSystemTools::PutEnv(var);
# else # else
unsetenv(value); unsetenv(value);
return true; return true;