On Tue, 2020-02-04 at 14:53 +0100, Sebastian Huber wrote:
> Hello,
>
> I tried to build a recent GCC master on FreeBSD 12.1 and it failed
> with
> a compile error:
>
> $ clang --version
> FreeBSD clang version 8.0.1 (tags/RELEASE_801/final 366581) (based
> on
> LLVM 8.0.1)
> Target: x86_64-unknown-freebsd12.1
> Thread model: posix
> InstalledDir: /usr/bin
>
> ../../gnu-mirror-gcc-5bc9d2f5ed4/gcc/analyzer/engine.cc:2965:13:
> error:
> reinterpret_cast from 'nullptr_t' to 'function *' is not allowed
> v.m_fun = reinterpret_cast<function *> (NULL);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../../gnu-mirror-gcc-5bc9d2f5ed4/gcc/analyzer/engine.cc:2977:21:
> error:
> reinterpret_cast from 'nullptr_t' to 'function *' is not allowed
> return v.m_fun == reinterpret_cast<function *> (NULL);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> This simple test program fails also:
>
> struct function;
>
> function *f(void)
> {
> return reinterpret_cast<function *>(nullptr);
> }
>
> $ clang -c test.cc
> test.cc:5:10: error: reinterpret_cast from 'nullptr_t' to 'function
> *'
> is not allowed
> return reinterpret_cast<function *>(nullptr);
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 1 error generated.
>
> I was able to build the GCC master on January 2nd 2020. Does this
> look
> like an LLVM 8.0.1 issue or a GCC issue?
Sorry, this was my code.
This is https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93543
Does this patch fix the build for you with clang?
gcc/analyzer/ChangeLog:
PR analyzer/93543
* engine.cc (pod_hash_traits<function_call_string>::mark_empty):
Eliminate reinterpret_cast.
(pod_hash_traits<function_call_string>::is_empty): Likewise.
---
gcc/analyzer/engine.cc | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/analyzer/engine.cc b/gcc/analyzer/engine.cc
index 90f7067dec1..81b8a76c5eb 100644
--- a/gcc/analyzer/engine.cc
+++ b/gcc/analyzer/engine.cc
@@ -2962,7 +2962,7 @@ template <>
inline void
pod_hash_traits<function_call_string>::mark_empty (value_type &v)
{
- v.m_fun = reinterpret_cast<function *> (NULL);
+ v.m_fun = NULL;
}
template <>
inline bool
@@ -2974,7 +2974,7 @@ template <>
inline bool
pod_hash_traits<function_call_string>::is_empty (value_type v)
{
- return v.m_fun == reinterpret_cast<function *> (NULL);
+ return v.m_fun == NULL;
}
namespace ana {
--
2.21.0
