bb44d9e754
See here for background: https://bugreports.qt.io/browse/QTBUG-34748 libxcb temporarily had an abi breakage which caused crashes when qt was compiled against a non-compatible version. Building qt with -qt-xcb should have shielded us from this issue, except that incompatible headers were used when building qt's wrapper. Make sure those headers aren't picked up by qt's build. Details: qt's build adds a wrapper around the xcb libs when -qt-xcb is used. This is done to avoid having to link to a handful of different libs, which may not be api/abi stable. This build depends on include-order, so that its files are found before the real libxcb headers. Our build (for other reasons related to qt's complicated build-system) injects our prefix into CXXFLAGS. Because libxcb is found in this path, that reverses the include-order, negating the purpose of the wrapper. To fix, libxcb's includes are simply moved to a subdir. pkg-config ensures that they're still found properly when needed. To make things even more interesting, this behavior in qt's .pro files is broken: INCLUDEPATH += $$QMAKE_CFLAGS_XCB The INCLUDEPATH variable is processed by qmake which automatically prefixes each entry with "-I". The QMAKE_CFLAGS_XCB variable comes from pkg-config and already contains -I, making the path look like "-I-I/path/to/xcb/headers". To work around that, CFLAGS/CXXFLAGS are used here rather than INCLUDEPATH.
32 lines
1.3 KiB
Diff
32 lines
1.3 KiB
Diff
--- old/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro 2015-03-17 02:06:42.705930685 +0000
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+++ new/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro 2015-03-17 02:08:41.281926351 +0000
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@@ -103,7 +103,6 @@
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DEFINES += $$QMAKE_DEFINES_XCB
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LIBS += $$QMAKE_LIBS_XCB
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-QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_XCB
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CONFIG += qpa/genericunixfontdatabase
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@@ -118,7 +117,8 @@
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contains(QT_CONFIG, xcb-qt) {
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DEFINES += XCB_USE_RENDER
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XCB_DIR = ../../../3rdparty/xcb
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- INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/sysinclude
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+ QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
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+ QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
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LIBS += -lxcb -L$$OUT_PWD/xcb-static -lxcb-static
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} else {
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LIBS += -lxcb -lxcb-image -lxcb-icccm -lxcb-sync -lxcb-xfixes -lxcb-shm -lxcb-randr
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--- old/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro 2015-03-17 02:07:04.641929383 +0000
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+++ new/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro 2015-03-17 02:10:15.485922059 +0000
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@@ -8,7 +8,7 @@
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XCB_DIR = ../../../../3rdparty/xcb
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-INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/include/xcb $$XCB_DIR/sysinclude
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+QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/include/xcb -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
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# ignore compiler warnings in 3rdparty code
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QMAKE_CFLAGS_STATIC_LIB+=-w
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