depends: fix build issue with XCode 15 on Qt

depends/packages/qt.mk

@@ -17,6 +17,7 @@ $(package)_patches += qtbase-moc-ignore-gcc-macro.patch
 $(package)_patches += no_qrhi.patch
 $(package)_patches += drop_lrelease_dependency.patch
 $(package)_patches += subdirs.pro
+$(package)_patches += fix-macos-linker.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=c92af4171397a0ed272330b4fa0669790fcac8d050b07c8b8cc565ebeba6735e
@@ -255,6 +256,7 @@ endef
 # CROSS_LIBRARY_PATH. See #15277.
 define $(package)_preprocess_cmds
   rm -f $(BASEDIR)/.qmake.stash && \
+  patch -p1 -i $($(package)_patch_dir)/fix-macos-linker.patch && \
   patch -p1 -i $($(package)_patch_dir)/drop_lrelease_dependency.patch && \
   patch -p1 -i $($(package)_patch_dir)/dont_hardcode_pwd.patch && \
   patch -p1 -i $($(package)_patch_dir)/dont_hardcode_x86_64.patch && \

depends/patches/qt/fix-macos-linker.patch

@@ -0,0 +1,55 @@
+qmake: Don't error out if QMAKE_DEFAULT_LIBDIRS is empty on macOS
+
+The new linker in Xcode 15 doesn't provide any default linker or
+framework paths when requested via -v, but still seems to use the
+default paths documented in the ld man page.
+
+We trust that linker will do the right thing, even if we don't
+know of its default linker paths.
+
+We also need to opt out of the default fallback logic to
+set the libdirs to /lib and /usr/lib.
+
+This may result in UnixMakefileGenerator::findLibraries finding
+different libraries than expected, if additional paths are
+passed with -L, which will then take precedence for qmake,
+even if the linker itself will use the library from the
+SDK's default paths. This should hopefully not be an issue
+in practice, as we don't turn -lFoo into absolute paths in
+qmake, so the only risk is that we're picking up the wrong
+prl files and adding additional dependencies that the lib
+in the SDK doesn't have.
+
+Upstream commits:
+ - Qt 5.15.16: Not yet publicly available.
+ - Qt dev: cdf64b0e47115cc473e1afd1472b4b09e130b2a5
+
+For other Qt branches see
+https://codereview.qt-project.org/q/I2347b26e2df0828471373b0e15b8c9089274c65d
+
+--- old/qtbase/mkspecs/features/toolchain.prf
++++ new/qtbase/mkspecs/features/toolchain.prf
+@@ -288,9 +288,12 @@ isEmpty($${target_prefix}.INCDIRS) {
+                 }
+             }
+         }
+-        isEmpty(QMAKE_DEFAULT_LIBDIRS)|isEmpty(QMAKE_DEFAULT_INCDIRS): \
++        isEmpty(QMAKE_DEFAULT_INCDIRS): \
+             !integrity: \
+-                error("failed to parse default search paths from compiler output")
++                error("failed to parse default include paths from compiler output")
++        isEmpty(QMAKE_DEFAULT_LIBDIRS): \
++            !integrity:!darwin: \
++                error("failed to parse default library paths from compiler output")
+         QMAKE_DEFAULT_LIBDIRS = $$unique(QMAKE_DEFAULT_LIBDIRS)
+     } else: ghs {
+         cmd = $$QMAKE_CXX $$QMAKE_CXXFLAGS -$${LITERAL_HASH} -o /tmp/fake_output /tmp/fake_input.cpp
+@@ -412,7 +415,7 @@ isEmpty($${target_prefix}.INCDIRS) {
+         QMAKE_DEFAULT_INCDIRS = $$split(INCLUDE, $$QMAKE_DIRLIST_SEP)
+     }
+
+-    unix:if(!cross_compile|host_build) {
++    unix:!darwin:if(!cross_compile|host_build) {
+         isEmpty(QMAKE_DEFAULT_INCDIRS): QMAKE_DEFAULT_INCDIRS = /usr/include /usr/local/include
+         isEmpty(QMAKE_DEFAULT_LIBDIRS): QMAKE_DEFAULT_LIBDIRS = /lib /usr/lib
+     }