qt5base-lts/mkspecs/features/qt_helper_lib.prf
Oswald Buddenhagen 4f2a571f09 fix usage of "empty" libraries
a header-only library in a default location would produce no variables
at all, making it appear undefined. fix this by forcing the writeout of
the QMAKE_LIBS_* variable, and use its definedness (rather than
non-emptiness) as a signifier.

this works for both QMAKE_USE and configure tests'/libraries' 'use'
entries.

Change-Id: Id7a1e23725caba1a91ea4db448b4aeb7fe632393
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
2017-02-22 07:45:52 +00:00

61 lines
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#
# W A R N I N G
# -------------
#
# This file is not part of the Qt API. It exists purely as an
# implementation detail. It may change from version to version
# without notice, or even be removed.
#
# We mean it.
#
load(qt_build_paths)
TEMPLATE = lib
CONFIG -= qt
QT = # In case qt is re-added.
INCLUDEPATH += $$MODULE_INCLUDEPATH
DEFINES += $$MODULE_DEFINES
CONFIG -= warning_clean # Don't presume 3rd party code to be clean
load(qt_common)
qtConfig(debug_and_release): CONFIG += debug_and_release
qtConfig(build_all): CONFIG += build_all
DESTDIR = $$MODULE_BASE_OUTDIR/lib
DLLDESTDIR = $$MODULE_BASE_OUTDIR/bin
THE_TARGET = $$qt5LibraryTarget($$TARGET)
!build_pass {
MODULE = $$replace(TARGET, ^qt, )
MODULE_PRI = $$MODULE_QMAKE_OUTDIR/mkspecs/modules/qt_ext_$${MODULE}.pri
ucmodule = $$upper($$MODULE)
MODULE_PRI_CONT = \
"QMAKE_INCDIR_$${ucmodule} = $$val_escape(MODULE_INCLUDEPATH)" \
"QMAKE_DEFINES_$${ucmodule} = $$val_escape(MODULE_DEFINES)"
debug_and_release {
win32: MODULE_DEBUG_LIBS = -L$$DESTDIR -l$${TARGET}d
darwin: MODULE_DEBUG_LIBS = -L$$DESTDIR -l$${TARGET}_debug
MODULE_RELEASE_LIBS = -L$$DESTDIR -l$$TARGET
MODULE_PRI_CONT += \
"QMAKE_LIBS_$${ucmodule} =" \ # Needed for the module to be recognized.
"QMAKE_LIBS_$${ucmodule}_DEBUG = $$val_escape(MODULE_DEBUG_LIBS)" \
"QMAKE_LIBS_$${ucmodule}_RELEASE = $$val_escape(MODULE_RELEASE_LIBS)"
} else {
MODULE_LIBS = -L$$DESTDIR -l$$THE_TARGET
MODULE_PRI_CONT += \
"QMAKE_LIBS_$${ucmodule} = $$val_escape(MODULE_LIBS)"
}
write_file($$MODULE_PRI, MODULE_PRI_CONT)|error()
}
TARGET = $$THE_TARGET
# In static builds of Qt, convenience libraries must be installed,
# as in this case they are not linked to the final library/plugin.
installed|if(!not_installed:qtConfig(static)): load(qt_installs)