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[rcore rglfw] Feature Test Macros before include (#3737)

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Move/Add Feature Test Macros before any includes.
See: [GNU Feature Test Macros](https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html)
> You should define these macros by using ‘#define’ preprocessor directives at the top of your source code files. These directives must come before any #include of a system header file. It is best to make them the very first thing in the file, preceded only by comments.

Alternative changes to rcore would be to change _POSIX_C_SOURCE to
200809L, which removes the need to define _XOPEN_SOURCE >= 500.

These changes allow for compilation with -std=c* (such as -std=c99)
without adding -D macros to the build step.

Co-authored-by: JayLCypher <jaylcypher@github.com>
This commit is contained in:
John 2024-01-20 21:08:19 +01:00 • committed by GitHub
parent 0a8165c0ac
commit 192f7f1b29
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2 changed files with 25 additions and 5 deletions
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18
src/rcore.c
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@ -82,6 +82,19 @@
* *
**********************************************************************************************/ **********************************************************************************************/
//----------------------------------------------------------------------------------
// Feature Test Macros required for this module
//----------------------------------------------------------------------------------
#if (defined(__linux__) || defined(PLATFORM_WEB)) && (_XOPEN_SOURCE < 500)
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE 500 // Required for: readlink if compiled with c99 without gnu ext.
#endif
#if (defined(__linux__) || defined(PLATFORM_WEB)) && (_POSIX_C_SOURCE < 199309L)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199309L // Required for: CLOCK_MONOTONIC if compiled with c99 without gnu ext.
#endif
#include "raylib.h" // Declares module functions #include "raylib.h" // Declares module functions
// Check if config flags have been externally provided on compilation line // Check if config flags have been externally provided on compilation line
@ -235,11 +248,6 @@ __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigne
#define FLAG_TOGGLE(n, f) ((n) ^= (f)) #define FLAG_TOGGLE(n, f) ((n) ^= (f))
#define FLAG_CHECK(n, f) ((n) & (f)) #define FLAG_CHECK(n, f) ((n) & (f))
#if (defined(__linux__) || defined(PLATFORM_WEB)) && (_POSIX_C_SOURCE < 199309L)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199309L // Required for: CLOCK_MONOTONIC if compiled with c99 without gnu ext.
#endif
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------
// Types and Structures Definition // Types and Structures Definition
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------

12
src/rglfw.c
View file

@ -37,6 +37,18 @@
// _GLFW_OSMESA to use the OSMesa API (headless and non-interactive) // _GLFW_OSMESA to use the OSMesa API (headless and non-interactive)
// _GLFW_MIR experimental, not supported at this moment // _GLFW_MIR experimental, not supported at this moment
//----------------------------------------------------------------------------------
// Feature Test Macros required for this module
//----------------------------------------------------------------------------------
#if (defined(__linux__) || defined(PLATFORM_WEB)) && (_POSIX_C_SOURCE < 199309L)
#undef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 199309L // Required for: CLOCK_MONOTONIC if compiled with c99 without gnu ext.
#endif
#if (defined(__linux__) || defined(PLATFORM_WEB)) && !defined(_GNU_SOURCE)
#undef _GNU_SOURCE
#define _GNU_SOURCE // Required for: ppoll if compiled with c99 without gnu ext.
#endif
#if defined(_WIN32) || defined(__CYGWIN__) #if defined(_WIN32) || defined(__CYGWIN__)
#define _GLFW_WIN32 #define _GLFW_WIN32
#endif #endif