From 401510dbbec40b5c6350bb8a9be3ab92292dbc3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@digia.com>
Date: Fri, 11 Oct 2013 12:56:06 +0200
Subject: iOS: Move qmake features out of the generic features and into the
 makespec
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As they are closely tied to the macx-ios-clang mkspec and can't be shared.

Change-Id: Icb59304cc1e4be12732f50175f3f84be289300c2
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
---
 mkspecs/macx-ios-clang/features/qt.prf | 75 ++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 mkspecs/macx-ios-clang/features/qt.prf

(limited to 'mkspecs/macx-ios-clang/features/qt.prf')

diff --git a/mkspecs/macx-ios-clang/features/qt.prf b/mkspecs/macx-ios-clang/features/qt.prf
new file mode 100644
index 0000000000..9fa882c99f
--- /dev/null
+++ b/mkspecs/macx-ios-clang/features/qt.prf
@@ -0,0 +1,75 @@
+
+equals(TEMPLATE, app):contains(QT, gui(-private)?) {
+    !macx-xcode: \
+        error("Linking the iOS platform plugin requires bulding through Xcode")
+
+    LIBS *= -L$$[QT_INSTALL_PLUGINS/get]/platforms
+
+    lib_name = qios
+    lib_path_and_base = $$[QT_INSTALL_PLUGINS/get]/platforms/lib$${lib_name}$$qtPlatformTargetSuffix()
+    LIBS += -l$${lib_name}$$qtPlatformTargetSuffix() $$fromfile($${lib_path_and_base}.prl, QMAKE_PRL_LIBS)
+
+    # By marking qt_registerPlatformPlugin as undefined, we ensure that
+    # the plugin.o translation unit is considered for inclusion in
+    # the final binary, which in turn ensures that the plugin's
+    # static initializer is included and run.
+    QMAKE_LFLAGS += -u _qt_registerPlatformPlugin
+
+    # We do link and dependency resolution for the platform plugin
+    # manually, since we know we always need the plugin, so we don't
+    # need to generate an import for it.
+    CONFIG -= import_qpa_plugin
+
+    !no_main_wrapper {
+        # Instead of messing with the user's main function we go the other
+        # way and change the application entry point to call our main wrapper.
+        # This entry point is the 'start' symbol, provided by crt1.o, so we
+        # make a copy of the file and rename the '_main' unresolved symbol
+        # to our wrapper function, '_qtmn', injecting ourselves into the app
+        # startup. Once Apple starts shipping the LLVM linker (lld) we may
+        # get rid of this step completely and just pass -e _qtmn to the
+        # linker, taking advantage of the new LC_MAIN load command.
+
+        # We know that iOS 3.1 and up uses crt1.3.1.o (technically not
+        # true for simulator, but the SDK has a symlink to the correct file).
+        original_crt_path = "$(SDK_DIR)/usr/lib/crt1.3.1.o"
+
+        xcode_objects_path = "$(OBJECT_FILE_DIR_$(CURRENT_VARIANT))/$(CURRENT_ARCH)"
+        custom_crt_filename = "crt1_qt.o"
+        custom_crt_path = "$$xcode_objects_path/$$custom_crt_filename"
+
+        EOC = $$escape_expand(\\n\\t)
+        create_custom_crt.commands = \
+            # Copy original crt1 to build directory
+            "$$QMAKE_COPY_FILE $$original_crt_path $$custom_crt_path $$EOC" \
+            # And rename all occurrences of _main to _qtmn
+            "strings -t d - $${custom_crt_path}" \
+                "| sed -n 's/^\\([0-9]\\{1,\\}\\) _main\$\$/\1/p'" \
+                "| while read offset; do" \
+                    "printf '_qtmn'" \
+                        "| dd of=$${custom_crt_path} bs=1 seek=\$\$offset conv=notrunc >/dev/null 2>&1" \
+                "; done"
+        create_custom_crt.depends = $$original_crt_path
+        create_custom_crt.target = $$custom_crt_path
+        preprocess.depends = create_custom_crt
+        QMAKE_EXTRA_TARGETS += create_custom_crt preprocess
+
+        clean_custom_crt.commands = "$$QMAKE_DEL_FILE $$custom_crt_path"
+        preprocess_clean.depends += clean_custom_crt
+        QMAKE_EXTRA_TARGETS += clean_custom_crt preprocess_clean
+
+        # Prevent usage of new LC_MAIN load command, which skips start/crt1
+        # and calls main from the loader. We rely on injecting into start.
+        QMAKE_LFLAGS += -Wl,-no_new_main
+
+        # Explicitly link against our modified crt1 object
+        QMAKE_LFLAGS += -nostartfiles -l$${custom_crt_filename}
+
+        # Workaround for QMAKE_PBX_LIBPATHS mangling the Xcode variables
+        lib_search_path.name = LIBRARY_SEARCH_PATHS
+        lib_search_path.value = $$xcode_objects_path
+        QMAKE_MAC_XCODE_SETTINGS += lib_search_path
+    }
+}
+
+load(qt)
-- 
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