File Add-a-linker-version-script-to-Qt-libraries.patch of Package libqt5-qtbase

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File Add-a-linker-version-script-to-Qt-libraries.patch of Package libqt5-qtbase (Revision e9fc4019aa521900cbd909781f0ea940)

Currently displaying revision e9fc4019aa521900cbd909781f0ea940 , Show latest

From 38c28ad2420542d795a27c5359226260c886b112 Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Tue, 2 Jun 2015 11:10:22 -0700
Subject: [PATCH] Add a linker version script to Qt libraries

This linker script is only enabled for systems with GCC or GCC-like
compilers, though technically it should work on the BSDs too (will
enable after testing). For regular modules, this declares one ELF
version "Qt_5" and places all QtCore symbols inside, then it declares
unused ELF versions "Qt_5.x" for each older minor release. For modules
declared "internal_module", all symbols are placed in version
Qt_5_PRIVATE_API.

The big advantage of an ELF version is that, when we do Qt 6, both
versions of QtCore could be loaded in memory without conflicts and all
symbols would be resolved to the correct library. No module can talk to
both at the same time, but this avoids mistakes of loading them
indirectly by plugins.

The extra Qt_5.x versions will be used in the next commit.

Change-Id: I049a653beeb5454c9539ffff13e3fe6f050fdf31
---
 mkspecs/common/gcc-base-unix.conf             |  1 +
 mkspecs/common/qcc-base-qnx.conf              |  1 +
 mkspecs/features/qt_module.prf                | 22 ++++++++++++++++++++++
 mkspecs/linux-icc/qmake.conf                  |  1 +
 mkspecs/unsupported/linux-host-g++/qmake.conf |  1 +
 5 files changed, 26 insertions(+)

diff --git a/mkspecs/common/gcc-base-unix.conf b/mkspecs/common/gcc-base-unix.conf
index 29e0521..3e0b3ba 100644
--- a/mkspecs/common/gcc-base-unix.conf
+++ b/mkspecs/common/gcc-base-unix.conf
@@ -22,3 +22,4 @@ QMAKE_LFLAGS_USE_GOLD   = -fuse-ld=gold
 # -Bsymbolic-functions (ld) support
 QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
 QMAKE_LFLAGS_DYNAMIC_LIST   = -Wl,--dynamic-list,
+QMAKE_LFLAGS_VERSION_SCRIPT = -Wl,--version-script,
diff --git a/mkspecs/common/qcc-base-qnx.conf b/mkspecs/common/qcc-base-qnx.conf
index a0a88b9..cebbe06 100644
--- a/mkspecs/common/qcc-base-qnx.conf
+++ b/mkspecs/common/qcc-base-qnx.conf
@@ -19,6 +19,7 @@ QMAKE_LFLAGS_RPATHLINK  = -Wl,-rpath-link,
 # -Bsymbolic-functions (ld) support
 QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
 QMAKE_LFLAGS_DYNAMIC_LIST   = -Wl,--dynamic-list,
+QMAKE_LFLAGS_VERSION_SCRIPT = -Wl,--version-script,
 
 # Generic options for all BlackBerry/QNX qcc mkspecs
 QMAKE_CFLAGS_THREAD     = -D_REENTRANT
diff --git a/mkspecs/features/qt_module.prf b/mkspecs/features/qt_module.prf
index 8919d41..3264740 100644
--- a/mkspecs/features/qt_module.prf
+++ b/mkspecs/features/qt_module.prf
@@ -185,6 +185,28 @@ equals(QT_ARCH, i386):contains(QT_CPU_FEATURES.$$QT_ARCH, sse2):compiler_support
     QMAKE_CXXFLAGS += -mfpmath=sse
 }
 
+!isEmpty(QMAKE_LFLAGS_VERSION_SCRIPT):!static {
+    verscript = $$OUT_PWD/$${TARGET}.version
+    QMAKE_LFLAGS += $${QMAKE_LFLAGS_VERSION_SCRIPT}$$verscript
+
+    internal_module {
+        verscript_content = "Qt_$${QT_MAJOR_VERSION}_PRIVATE_API { *; };"
+    } else {
+        current = Qt_$$QT_MAJOR_VERSION
+        verscript_content = "$$current { *; };"
+        for(i, 0..$$section(VERSION, ., 1, 1)) {
+            previous = $$current
+            current = Qt_$${QT_MAJOR_VERSION}.$$i
+            verscript_content += "$$current {} $$previous;"
+        }
+    }
+    write_file($$verscript, verscript_content)|error("Aborting.")
+    unset(current)
+    unset(previous)
+    unset(verscript)
+    unset(verscript_content)
+}
+
 android: CONFIG += qt_android_deps
 
 #install directives
diff --git a/mkspecs/linux-icc/qmake.conf b/mkspecs/linux-icc/qmake.conf
index 8119c8a..0cd55ee 100644
--- a/mkspecs/linux-icc/qmake.conf
+++ b/mkspecs/linux-icc/qmake.conf
@@ -97,6 +97,7 @@ QMAKE_CXXFLAGS_PRECOMPILE = -c -pch-create ${QMAKE_PCH_OUTPUT} -include ${QMAKE_
 # -Bsymbolic-functions (ld) support
 QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
 QMAKE_LFLAGS_DYNAMIC_LIST = -Wl,--dynamic-list,
+QMAKE_LFLAGS_VERSION_SCRIPT = -Wl,--version-script,
 
 # Symbol visibility control
 QMAKE_CFLAGS_HIDESYMS   += -fvisibility=hidden
diff --git a/mkspecs/unsupported/linux-host-g++/qmake.conf b/mkspecs/unsupported/linux-host-g++/qmake.conf
index 1523126..546ff21 100644
--- a/mkspecs/unsupported/linux-host-g++/qmake.conf
+++ b/mkspecs/unsupported/linux-host-g++/qmake.conf
@@ -71,6 +71,7 @@ QMAKE_PCH_OUTPUT_EXT    = .gch
 # -Bsymbolic-functions (ld) support
 QMAKE_LFLAGS_BSYMBOLIC_FUNC = -Wl,-Bsymbolic-functions
 QMAKE_LFLAGS_DYNAMIC_LIST = -Wl,--dynamic-list,
+QMAKE_LFLAGS_VERSION_SCRIPT = -Wl,--version-script,
 
 #
 # qmake configuration for common linux
-- 
2.3.5

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File Add-a-linker-version-script-to-Qt-libraries.patch of Package libqt5-qtbase (Revision e9fc4019aa521900cbd909781f0ea940)

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