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Daniel Bertalan 187eec8a2f Fix Xcode 16 build break with NULL != nullptr
As of Xcode 16 beta 2 with the macOS 15 SDK, each re-inclusion of the
stddef.h header causes the NULL macro in C++ to be re-defined to an
integral constant (__null). This makes the workaround in d59a576b8
("Redefine NULL to nullptr") ineffective, as other headers that are
typically included after system.h (such as obstack.h) do include
stddef.h too.

This can be seen by running the sample below through `clang++ -E`

    #include <stddef.h>
    #define NULL nullptr
    #include <stddef.h>
    NULL

The relevant libc++ change is here:
2950283ddd

Filed as FB14261859 to Apple and added a comment about it on LLVM PR
86843.

This fixes the cases in --enable-languages=c,c++,objc,obj-c++,rust build
where NULL being an integral constant instead of a null pointer literal
(therefore no longer implicitly converting to a pointer when used as a
template function's argument) caused issues.

    gcc/value-pointer-equiv.cc:65:43: error: no viable conversion from `pair<typename __unwrap_ref_decay<long>::type, typename __unwrap_ref_decay<long>::type>' to 'const pair<tree, tree>'

    65 |   const std::pair <tree, tree> m_marker = std::make_pair (NULL, NULL);
       |                                           ^~~~~~~~~~~~~~~~~~~~~~~~~~~

As noted in the previous commit though, the proper solution would be to
phase out the usages of NULL in GCC's C++ source code.

gcc/analyzer/ChangeLog:

	* diagnostic-manager.cc (saved_diagnostic::saved_diagnostic):
	Change NULL to nullptr.
	(struct null_assignment_sm_context): Likewise.
	* infinite-loop.cc: Likewise.
	* infinite-recursion.cc: Likewise.
	* varargs.cc (va_list_state_machine::on_leak): Likewise.

gcc/rust/ChangeLog:

	* metadata/rust-imports.cc (Import::try_package_in_directory):
	Change NULL to nullptr.

gcc/ChangeLog:

	* value-pointer-equiv.cc: Change NULL to nullptr.

Signed-off-by: Daniel Bertalan <dani@danielbertalan.dev>
(cherry picked from commit 08776bef53835ff6318ecfeade8f6c6896ffd81f)
2024-07-19 14:54:26 +01:00
.github Minor formatting fix for newly-added file from previous commit 2023-11-01 19:28:56 -04:00
c++tools Update ChangeLog and version files for release 2024-05-07 06:52:35 +00:00
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contrib Daily bump. 2024-05-09 11:03:31 +00:00
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gcc Fix Xcode 16 build break with NULL != nullptr 2024-07-19 14:54:26 +01:00
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ChangeLog Update ChangeLog and version files for release 2024-05-07 06:52:35 +00:00
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config-ml.in LoongArch: Reimplement multilib build option handling. 2023-09-15 10:42:12 +08:00
config.guess
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config.sub config.sub: change mode to 755. 2021-12-21 09:10:57 +01:00
configure build: Use of cargo not yet supported here in Canadian cross configurations 2024-04-16 09:43:47 +02:00
configure.ac build: Use of cargo not yet supported here in Canadian cross configurations 2024-04-16 09:43:47 +02:00
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MAINTAINERS MAINTAINERS: Update my email address 2024-04-04 16:39:52 +02:00
Makefile.def gccrs: Fix missing build dependency 2024-01-16 16:23:02 +01:00
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