Hi!

Since alloca will return void*, g++ will report error(-fpermissive, invalid conversion from void* to char*), if you do strcpy(alloca(32), str), which is the definition of strdupa on musl. I've patched it by type casting to fix the build of bazel. Could this be merged upstream?

--- a/include/string.h  2022-04-08 01:12:40.000000000 +0800
+++ b/include/string.h  2022-04-08 01:12:40.000000000 +0800
@@ -88,7 +88,7 @@
 #endif
 
 #ifdef _GNU_SOURCE
-#define        strdupa(x)      strcpy(alloca(strlen(x)+1),x)
+#define        strdupa(x)      strcpy((char*)(alloca(strlen(x)+1)),x)
 int strverscmp (const char *, const char *);
 char *strchrnul(const char *, int);
 char *strcasestr(const char *, const char *);

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