83 lines
2.8 KiB
Makefile
83 lines
2.8 KiB
Makefile
# -*-makefile-*- <-- an Emacs control
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# The including make file must define these make variables:
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#
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# SHARED_LIBS_TO_BUILD: List of the shared libraries that need to be
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# built -- just the basic library names. E.g. "libfoo libbar"
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#
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# SHARED_LIBS_TO_INSTALL: List of the shared libraries that need to be
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# installed -- just the basic library names. E.g. "libfoo libbar"
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#
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# SHLIB_SUFFIX: Shared library filename suffix, e.g. "so".
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#
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# MAJ: Library major version number, e.g. "3" in file name "libfoo.3.1"
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#
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# MIN: Library minor version number, e.g. "1" in file name "libfoo.3.1"
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#
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# LDFLAGS_SHLIB: linker (Ld) flags needed to link object files together into
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# a shared library. May use $(SONAME) for the soname of the library.
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# Include -lc if appropriate.
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#
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# LADD: Additional linker flags (normally set on the make command line).
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#
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# INSTALL_DATA: beginning of shell command to install a library file.
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#
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# DESTDIR: main installation directory
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#
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# LIBINST_DIR: directory in which to install libraries, relative to DESTDIR.
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#
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# LN_S: beginning of shell command to make symbolic link (e.g. "ln -s").
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#
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# CXXLD: beginning of shell command to link, e.g. "g++".
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# This make file defines these make variables that the including make file
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# can use:
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#
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# SHLIB_CMD: a command to build a shared library for C linkage
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# You can use this in a rule to build a shared library
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# SHLIBPP_CMD: Same, but for C++ linkage
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# Including make file must contain a rule to build each library file
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# (e.g. libfoo.3.1)
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# This make file provides these rules:
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#
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# install-shared-libraries: install all shared libraries and the necessary
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# symbolic links.
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# SONAME is to be referenced by $(LDFLAGS_SHLIB) in the rule to make
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# a shared library (in common.mk). I.e. $@ is the name of the shared
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# library file.
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# SONAME is the name of the library file being built, with the minor
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# version number cut off. E.g. if we're building libfoo.so.1.2, SONAME
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# is libfoo.so.1 .
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SONAME = $(@:%.$(MIN)=%)
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SHLIB_CMD = $(CCLD) $(LADD) $(LDFLAGS_SHLIB) -o $@ $^
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SHLIB_LE_TARGETS = $(call shliblefn, $(SHARED_LIBS_TO_BUILD))
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$(SHLIB_LE_TARGETS):%:%.$(MAJ).$(MIN)
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rm -f $@
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$(LN_S) $< $@
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.PHONY: $(SHLIB_INSTALL_TARGETS)
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.PHONY: install-shared-libraries
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SHLIB_INSTALL_TARGETS = $(SHARED_LIBS_TO_INSTALL:%=%/install)
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#SHLIB_INSTALL_TARGETS is like "libfoo/install libbar/install"
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install-shared-libraries: $(SHLIB_INSTALL_TARGETS)
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$(SHLIB_INSTALL_TARGETS):%/install:%.$(SHLIB_SUFFIX).$(MAJ).$(MIN)
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# $< is a library file name, e.g. libfoo.so.3.1 .
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$(INSTALL_SHLIB) $< $(DESTDIR)$(LIBINST_DIR)/$<
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cd $(DESTDIR)$(LIBINST_DIR); \
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rm -f $(<:%.$(MIN)=%); \
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$(LN_S) $< $(<:%.$(MIN)=%)
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cd $(DESTDIR)$(LIBINST_DIR); \
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rm -f $(<:%.$(MAJ).$(MIN)=%); \
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$(LN_S) $(<:%.$(MIN)=%) $(<:%.$(MAJ).$(MIN)=%)
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