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allow to c api with older c versions

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In the FFI world we have many tools that are not gcc/clang and therefore
not always support the latest C standard. This fixes support with cffi
i.e. used in https://github.com/tweag/python-nix

(cherry picked from commit 739418504c)
This commit is contained in:
Jörg Thalheim 2024-08-02 11:12:06 +02:00 committed by github-actions[bot]
parent 40832b0a95
commit b1941c9f8a
1 changed files with 11 additions and 1 deletions
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12
src/libexpr-c/nix_api_expr.h
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@ -14,6 +14,16 @@
#include "nix_api_util.h" #include "nix_api_util.h"
#include <stddef.h> #include <stddef.h>
#ifndef __has_c_attribute
# define __has_c_attribute(x) 0
#endif
#if __has_c_attribute(deprecated)
# define NIX_DEPRECATED(msg) [[deprecated(msg)]]
#else
# define NIX_DEPRECATED(msg)
#endif
#ifdef __cplusplus #ifdef __cplusplus
extern "C" { extern "C" {
#endif #endif
@ -45,7 +55,7 @@ typedef struct EvalState EvalState; // nix::EvalState
* @see nix_value_incref, nix_value_decref * @see nix_value_incref, nix_value_decref
*/ */
typedef struct nix_value nix_value; typedef struct nix_value nix_value;
[[deprecated("use nix_value instead")]] typedef nix_value Value; NIX_DEPRECATED("use nix_value instead") typedef nix_value Value;
// Function prototypes // Function prototypes
/** /**