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-rw-r--r--Source/cmCPluginAPI.cxx6
1 files changed, 4 insertions, 2 deletions
diff --git a/Source/cmCPluginAPI.cxx b/Source/cmCPluginAPI.cxx
index 8c2d987..80ca898 100644
--- a/Source/cmCPluginAPI.cxx
+++ b/Source/cmCPluginAPI.cxx
@@ -65,8 +65,10 @@ unsigned int CCONV cmGetMinorVersion(void*)
void CCONV cmAddDefinition(void* arg, const char* name, const char* value)
{
- cmMakefile* mf = static_cast<cmMakefile*>(arg);
- mf->AddDefinition(name, value);
+ if (value) {
+ cmMakefile* mf = static_cast<cmMakefile*>(arg);
+ mf->AddDefinition(name, value);
+ }
}
/* Add a definition to this makefile and the global cmake cache. */