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This patch make the ABI mechanism available to shared libraries other than Genode's dynamic linker. It thereby allows us to introduce intermediate ABIs at the granularity of shared libraries. This is useful for slow-moving ABIs such as the libc's interface but it will also become handy for the package management. To implement the feature, the build system had to be streamlined a bit. In particular, archive dependencies and shared-lib dependencies are now handled separately, and the global list of 'SHARED_LIBS' is no more. Now, the variable with the same name holds the per-target list of shared libraries used by the target. |
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| .. | ||
| spec | ||
| base-common.inc | ||
| base.inc | ||
| base.mk | ||
| cxx.mk | ||
| ld-platform.inc | ||
| ld.mk | ||
| ldso-startup.mk | ||
| README | ||
| startup.inc | ||
This directory contains library description files. Each '<libname>.mk' file holds the instruction for building the library '<libname>'. These makefiles are never used directly but they are called from the build system when required. When called, the build system passes the following variables: :'BASE_DIR': This is the base directory of the source tree. Source codes are specified by setting the 'SRC_CC' and 'SRC_C' variables. The source code locations must be specified via 'vpath'. A library can include other libraries by setting the 'LIBS' variable. Each '<libname>.mk' file must include the 'lib.mk' role file: ! include $(BASE_DIR)/mk/lib.mk Libraries implementing one and the same library interface may have specific implementations for different platforms. Such platform-specific '<libname>.mk' files should be placed into corresponding subdirectories. For example, the 'linux'-specific implementation of the 'server' library resides in the 'linux/' subdirectory. The build system automatically searches the right '<libname>.mk' file by evaluating the 'SPECS' configuration variable. If 'SPECS' is set to 'host linux', the build system will look into the directories './', './host', and './linux'.