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Only use __has_include when it is defined

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Per GCC's documentation:

> The __has_include operator by itself, without any operand or parentheses, acts as a predefined macro so that support for it can be tested in portable code. Thus, the recommended use of the operator is as follows:
>
>     #if defined __has_include
>     #  if __has_include (<stdatomic.h>)
>     #    include <stdatomic.h>
>     #  endif
>     #endif
>
> The first ‘#if’ test succeeds only when the operator is supported by the version of GCC (or another compiler) being used. Only when that test succeeds is it valid to use __has_include as a preprocessor operator.
This commit is contained in:
James McCoy 2020-09-20 11:30:20 -04:00
parent 9f704c88a5
commit 461c18edad
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GPG Key ID: DFE691AE331BA3DB
2 changed files with 8 additions and 1 deletions
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3
src/nvim/log.h
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@ -5,6 +5,7 @@
#include <stdbool.h>
#include "auto/config.h"
#include "nvim/macros.h"
#define DEBUG_LOG_LEVEL 0
#define INFO_LOG_LEVEL 1
@ -68,7 +69,7 @@
# define LOG_CALLSTACK_TO_FILE(fp) log_callstack_to_file(fp, __func__, __LINE__)
#endif
#if defined(__has_include) && __has_include("sanitizer/asan_interface.h")
#if NVIM_HAS_INCLUDE("sanitizer/asan_interface.h")
# include "sanitizer/asan_interface.h"
#endif

6
src/nvim/macros.h
View File

@ -152,6 +152,12 @@
#define STR_(x) #x
#define STR(x) STR_(x)
#ifndef __has_include
# define NVIM_HAS_INCLUDE(x) 0
#else
# define NVIM_HAS_INCLUDE __has_include
#endif
#ifndef __has_attribute
# define NVIM_HAS_ATTRIBUTE(x) 0
#elif defined(__clang__) && __clang__ == 1 \