mirror of
https://github.com/genodelabs/genode.git
synced 2025-01-25 05:46:57 +00:00
42fddf8390
The former ldso-startup static library (now called ldso_so_support) is used to spice each shared object/library with local support code for the dynamic linker (execution of static constructors and ARM-EABI). Therefore, the library must be statically linked to each dynamic library. As a result recipes for dynamic libraries must always depend on the "so" API, which makes ldso_so_support.mk and so_support.c available independent of "base". Additionally, ldso_so_support is also provided in the libc API to cut the dependency early for libc/posix libraries. Issue #3720
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'.