[openwrt/openwrt] toolchain: gdb: fix build error with Xcode 16.3

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch openwrt-24.10:
https://git.openwrt.org/9d3ca6d3e537b4c1d73b0337ea83f377982d4e58

commit 9d3ca6d3e537b4c1d73b0337ea83f377982d4e58
Author: Georgi Valkov <gvalkov at gmail.com>
AuthorDate: Mon Apr 14 15:28:23 2025 +0300

    toolchain: gdb: fix build error with Xcode 16.3
    
    Xcode 16.3 defines TARGET_OS_MAC, it was not defined in prior versions.
    zutil.h conditionally defines fdopen as NULL when this macro is defined,
    resulting in the following build error:
    
    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_stdio.h:318:7: error: expected identifier or '('
      318 | FILE    *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fdopen));
          |          ^
    ./zutil.h:147:33: note: expanded from macro 'fdopen'
      147 | #        define fdopen(fd,mode) NULL /* No fdopen() */
    
    In Xcode 16.2 and earlier, TARGET_OS_MAC was not defined so this entire
    block was ignored, gcc and gdb used to compile and work fine.
    
    This may have been used for compatibility with older versions of macOS,
    but is no longer needed. By pure luck, the build worked fine for a long
    time, because it did not properly detect macOS.
    Fixed by removing the check for TARGET_OS_MAC.
    
    Note that since Xcode 16.3, an entire set of TARGET_OS macros
    are now defined, most of which are set to 0:
    TARGET_OS_LINUX 0
    TARGET_OS_MAC 1
    TARGET_OS_OSX 1
    
    Signed-off-by: Georgi Valkov <gvalkov at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/18467
    (cherry picked from commit dfb8115d0cc00d40f2884d3119b44f3da69c997a)
    Link: https://github.com/openwrt/openwrt/pull/19096
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 toolchain/gdb/Makefile                             |  2 +-
 .../130-fix-build-error-with-Xcode-16.3.patch      | 52 ++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/toolchain/gdb/Makefile b/toolchain/gdb/Makefile
index ad0c843f75..861876d54a 100644
--- a/toolchain/gdb/Makefile
+++ b/toolchain/gdb/Makefile
@@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gdb
 PKG_VERSION:=15.2
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNU/gdb
diff --git a/toolchain/gdb/patches/130-fix-build-error-with-Xcode-16.3.patch b/toolchain/gdb/patches/130-fix-build-error-with-Xcode-16.3.patch
new file mode 100644
index 0000000000..4f76ed3c89
--- /dev/null
+++ b/toolchain/gdb/patches/130-fix-build-error-with-Xcode-16.3.patch
@@ -0,0 +1,52 @@
+From 0a084bb6c04e453183530c3e20727be1cc55ff9a Mon Sep 17 00:00:00 2001
+From: Georgi Valkov <gvalkov at gmail.com>
+Date: Mon, 14 Apr 2025 15:18:00 +0300
+Subject: [PATCH] zlib: fix build error with Xcode 16.3
+
+Xcode 16.3 defines TARGET_OS_MAC, it was not defined in prior versions.
+zutil.h conditionally defines fdopen as NULL when this macro is defined,
+resulting in the following build error:
+
+/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/_stdio.h:318:7: error: expected identifier or '('
+  318 | FILE    *fdopen(int, const char *) __DARWIN_ALIAS_STARTING(__MAC_10_6, __IPHONE_2_0, __DARWIN_ALIAS(fdopen));
+      |          ^
+./zutil.h:147:33: note: expanded from macro 'fdopen'
+  147 | #        define fdopen(fd,mode) NULL /* No fdopen() */
+
+In Xcode 16.2 and earlier, TARGET_OS_MAC was not defined so this entire
+block was ignored, gcc and gdb used to compile and work fine.
+
+This may have been used for compatibility with older versions of macOS,
+but is no longer needed. By pure luck, the build worked fine for a long
+time, because it did not properly detect macOS.
+Fixed by removing the check for TARGET_OS_MAC.
+
+Note that since Xcode 16.3, an entire set of TARGET_OS macros
+are now defined, most of which are set to 0:
+TARGET_OS_LINUX 0
+TARGET_OS_MAC 1
+TARGET_OS_OSX 1
+
+[1] https://github.com/openwrt/openwrt/pull/18467
+
+Signed-off-by: Georgi Valkov <gvalkov at gmail.com>
+---
+ zlib/zutil.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/zlib/zutil.h b/zlib/zutil.h
+index d9a20ae1bf4..183e51b96b6 100644
+--- a/zlib/zutil.h
++++ b/zlib/zutil.h
+@@ -137,7 +137,7 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+ #  endif
+ #endif
+ 
+-#if defined(MACOS) || defined(TARGET_OS_MAC)
++#if defined(MACOS)
+ #  define OS_CODE  7
+ #  ifndef Z_SOLO
+ #    if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+-- 
+2.49.0
+