main: do not declare `environ` on Windows
When building with `/MD` on Windows, `environ` is a macro expanding to
`__p_environ` which has dll-export storage. However, the redeclaration
does not annotate the DLL storage causing a mismatch warning
(`-Winconsistent-dllstorage`) which will be treated as an error. Let
the declaration from the system headers be the declaration required.
Closes #15300.
PiperOrigin-RevId: 448913737
diff --git a/src/main/cpp/blaze.cc b/src/main/cpp/blaze.cc
index 702d446..5907865 100644
--- a/src/main/cpp/blaze.cc
+++ b/src/main/cpp/blaze.cc
@@ -80,7 +80,9 @@
using blaze_util::GetLastErrorString;
+#if !defined(_WIN32)
extern char **environ;
+#endif
namespace blaze {
