diff options
Diffstat (limited to 'mkspecs/features/mac/unsupported/objc_namespace.prf')
| -rw-r--r-- | mkspecs/features/mac/unsupported/objc_namespace.prf | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/mkspecs/features/mac/unsupported/objc_namespace.prf b/mkspecs/features/mac/unsupported/objc_namespace.prf new file mode 100644 index 0000000000..94e0fbe0de --- /dev/null +++ b/mkspecs/features/mac/unsupported/objc_namespace.prf @@ -0,0 +1,50 @@ +# +# 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. +# + +# The Objective-C runtime will complain when loading a binary that +# introduces as class name that already exists in the global namespace. +# This may happen when linking Qt statically into a plugin, and then +# loading more than two plugins into the same host, both using Qt. +# +# We work around this by doing a bit of post-processing on the final +# binary, adding new suffixed class name entries to the __objc_classname +# section of the __TEXT segment, and then patching the class_ro_t +# entries to point to the newly added class names. +# +# By linking the binary between these two steps we avoid having to +# manually remap all the offsets in the Mach-O binary due to the +# added class names, instead relying on the linker to do this +# for us by linking in an assembly file with the added names. + +objc_namespace_script = $$clean_path($$PWD/../../data/mac/objc_namespace.sh) + +isEmpty(QMAKE_OBJC_NAMESPACE_SUFFIX) { + QMAKE_OBJC_NAMESPACE_SUFFIX = $$TARGET + !isEmpty(QMAKE_TARGET_BUNDLE_PREFIX): \ + QMAKE_OBJC_NAMESPACE_SUFFIX = $${QMAKE_TARGET_BUNDLE_PREFIX}.$${QMAKE_OBJC_NAMESPACE_SUFFIX} +} + +QMAKE_LFLAGS += \ + -Wobjc_namespace,--target=$$shell_quote($$TARGET) \ + -Wobjc_namespace,--suffix=$$shell_quote($$QMAKE_OBJC_NAMESPACE_SUFFIX) \ + -Wobjc_namespace,--original_ld=$$shell_quote($$QMAKE_LINK) + +!isEmpty(QMAKE_OBJC_NAMESPACE_EXCLUDE): \ + QMAKE_LFLAGS += -Wobjc_namespace,--exclude_list=$$shell_quote($$QMAKE_OBJC_NAMESPACE_EXCLUDE) +!isEmpty(QMAKE_OBJC_NAMESPACE_EXCLUDE_REGEX) { + equals(MAKEFILE_GENERATOR, UNIX): \ + QMAKE_OBJC_NAMESPACE_EXCLUDE_REGEX ~= s/\\$/\$\$/ + QMAKE_LFLAGS += -Wobjc_namespace,--exclude_regex=$$shell_quote($$QMAKE_OBJC_NAMESPACE_EXCLUDE_REGEX) +} + +slient: QMAKE_LFLAGS += -Wobjc_namespace,--silent=1 + +QMAKE_LINK = $$objc_namespace_script |