From a1cb3654fb0802ae28327cc521dc0600a341b75d Mon Sep 17 00:00:00 2001
From: Paul Walker <paul@pwjw.com>
Date: Wed, 10 Jul 2024 10:16:17 -0400
Subject: [PATCH] Merge pull request from upstream JUCE repo to support builds
 on musl libc (#6)

This commit squashes the four GLIBC/MUSL commits from https://github.com/juce-framework/JUCE/pull/1239 into our branch as a single commit (retaining a single commit to make future rebasing easier etc). Those commits were:

* SystemStats: Only use locales on glibc

* Linux: Add JUCE_GLIBC and JUCE_MUSL macros

* SystemStats: Do not use execinfo.h on JUCE_MUSL

* Native: Only use stat64 on glibc and iOS

Musl 1.2.4 made the LFS64 interfaces only available when
_LARGEFILE64_SOURCE is defined, and they will be removed altogether in
Musl 1.2.5.

---------

Co-authored-by: Violet Purcell <vimproved@inventati.org>

Rebase to 7.0.12 by baconpaul
---
 modules/juce_core/juce_core.cpp                     |  2 +-
 modules/juce_core/native/juce_SharedCode_posix.h    |  2 +-
 modules/juce_core/native/juce_SystemStats_linux.cpp | 12 ++++++------
 modules/juce_core/system/juce_SystemStats.cpp       |  2 +-
 modules/juce_core/system/juce_TargetPlatform.h      |  9 +++++++++
 5 files changed, 18 insertions(+), 9 deletions(-)

diff --git a/modules/juce_core/juce_core.cpp b/modules/juce_core/juce_core.cpp
index 8382283f918e..e7d7e69a5fc4 100644
--- a/modules/juce_core/juce_core.cpp
+++ b/modules/juce_core/juce_core.cpp
@@ -108,7 +108,7 @@
  #include <net/if.h>
  #include <sys/ioctl.h>
 
- #if ! (JUCE_ANDROID || JUCE_WASM)
+ #if ! (JUCE_ANDROID || JUCE_WASM || JUCE_MUSL)
   #include <execinfo.h>
  #endif
 #endif
diff --git a/modules/juce_core/native/juce_SharedCode_posix.h b/modules/juce_core/native/juce_SharedCode_posix.h
index c53ef0fff6f3..ba9f4c5e8f8b 100644
--- a/modules/juce_core/native/juce_SharedCode_posix.h
+++ b/modules/juce_core/native/juce_SharedCode_posix.h
@@ -178,7 +178,7 @@ inline int juce_siginterrupt ([[maybe_unused]] int sig, [[maybe_unused]] int fla
 //==============================================================================
 namespace
 {
-   #if JUCE_LINUX || (JUCE_IOS && (! TARGET_OS_MACCATALYST) && (! __DARWIN_ONLY_64_BIT_INO_T)) // (this iOS stuff is to avoid a simulator bug)
+   #if JUCE_GLIBC || (JUCE_IOS && (! TARGET_OS_MACCATALYST) && (! __DARWIN_ONLY_64_BIT_INO_T)) // (this iOS stuff is to avoid a simulator bug)
     using juce_statStruct = struct stat64;
     #define JUCE_STAT  stat64
    #else
diff --git a/modules/juce_core/native/juce_SystemStats_linux.cpp b/modules/juce_core/native/juce_SystemStats_linux.cpp
index 3d6bebc74c9a..6a21c6fbd56f 100644
--- a/modules/juce_core/native/juce_SystemStats_linux.cpp
+++ b/modules/juce_core/native/juce_SystemStats_linux.cpp
@@ -210,22 +210,22 @@ String SystemStats::getComputerName()
 
 String SystemStats::getUserLanguage()
 {
-   #if JUCE_BSD
+   #if JUCE_GLIBC
+    return getLocaleValue (_NL_ADDRESS_LANG_AB);
+   #else
     if (auto langEnv = getenv ("LANG"))
         return String::fromUTF8 (langEnv).upToLastOccurrenceOf (".UTF-8", false, true);
 
     return {};
-   #else
-    return getLocaleValue (_NL_ADDRESS_LANG_AB);
    #endif
 }
 
 String SystemStats::getUserRegion()
 {
-   #if JUCE_BSD
-    return {};
-   #else
+   #if JUCE_GLIBC
     return getLocaleValue (_NL_ADDRESS_COUNTRY_AB2);
+   #else
+    return {};
    #endif
 }
 
diff --git a/modules/juce_core/system/juce_SystemStats.cpp b/modules/juce_core/system/juce_SystemStats.cpp
index 6dafa07185f6..f44bb8f8a053 100644
--- a/modules/juce_core/system/juce_SystemStats.cpp
+++ b/modules/juce_core/system/juce_SystemStats.cpp
@@ -190,7 +190,7 @@ String SystemStats::getStackBacktrace()
 {
     String result;
 
-   #if JUCE_ANDROID || JUCE_WASM
+   #if JUCE_ANDROID || JUCE_MINGW || JUCE_WASM || JUCE_MUSL
     jassertfalse; // sorry, not implemented yet!
 
    #elif JUCE_WINDOWS
diff --git a/modules/juce_core/system/juce_TargetPlatform.h b/modules/juce_core/system/juce_TargetPlatform.h
index 0c55ad7c586a..19941a8685e0 100644
--- a/modules/juce_core/system/juce_TargetPlatform.h
+++ b/modules/juce_core/system/juce_TargetPlatform.h
@@ -45,6 +45,7 @@
     - Either JUCE_LITTLE_ENDIAN or JUCE_BIG_ENDIAN.
     - Either JUCE_INTEL or JUCE_ARM
     - Either JUCE_GCC or JUCE_CLANG or JUCE_MSVC
+    - Either JUCE_GLIBC or JUCE_MUSL will be defined on Linux depending on the system's libc implementation.
 */
 
 //==============================================================================
@@ -212,6 +213,14 @@
   #elif __MMX__ || __SSE__ || __amd64__
     #define JUCE_INTEL 1
   #endif
+
+  #if JUCE_LINUX
+    #ifdef __GLIBC__
+      #define JUCE_GLIBC 1
+    #else
+      #define JUCE_MUSL 1
+    #endif
+  #endif
 #endif
 
 //==============================================================================