BUILD: tools: fix warning about incorrect cast with dladdr1()
dladdr1() is used on glibc and takes a void**, but we pass it a
const ElfW(Sym)** and some compilers complain that we're aliasing.
Let's just set a may_alias attribute on the local variable to
address this. There's no need to backport this unless warnings are
reported on older distros or uncommon compilers.
diff --git a/src/tools.c b/src/tools.c
index aa90341..eca7aa8 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -4814,7 +4814,7 @@
{
int ret;
#if defined(__GLIBC__) && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) // most detailed one
- const ElfW(Sym) *sym;
+ const ElfW(Sym) *sym __attribute__((may_alias));
ret = dladdr1(addr, dli, (void **)&sym, RTLD_DL_SYMENT);
if (ret)