mirror of
https://github.com/HDFGroup/hdf5.git
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77 lines
2.7 KiB
Plaintext
77 lines
2.7 KiB
Plaintext
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Information for HDF5 maintainers:
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* You can run make from any directory. However, running in a
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subdirectory only knows how to build things in that directory and
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below. However, all makefiles know when their target depends on
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something outside the local directory tree:
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$ cd test
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$ make
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make: *** No rule to make target ../src/libhdf5.a
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* All Makefiles understand the following targets:
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all -- build locally.
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install -- install libs, headers, progs.
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uninstall -- removed installed files.
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mostlyclean -- remove temp files (eg, *.o but not *.a).
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clean -- mostlyclean plus libs and progs.
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distclean -- all non-distributed files.
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maintainer-clean -- all but H5config.h.in and configure.
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* Most Makefiles also understand:
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TAGS -- build a tags table
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dep depend -- recalculate source dependencies
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lib -- build just the libraries w/o programs
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* If you have personal preferences for which make, compiler, compiler
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flags, preprocessor flags, etc., that you use and you don't want to
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set environment variables, then use a site configuration file.
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When configure starts, it looks in the config directory for files
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whose name is some combination of the CPU name, vendor, and
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operating system in this order:
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CPU-VENDOR-OS
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VENDOR-OS
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OS
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The first file which is found is sourced and can therefore affect
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the behavior of the rest of configure. For example, the linux
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configuration file might contain:
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# Site configuration -- do not distribute this file.
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if test "X$CFLAGS" = "X"; then
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CFLAGS="-g -Wall"
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fi
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Site configuration files are for personal preferences and should
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not be distributed.
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* If you use GNU make along with gcc the Makefile will contain targets
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that automatically maintain a list of source interdependencies; you
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seldom have to say `make clean'. I say `seldom' because if you
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change how one `*.h' file includes other `*.h' files you'll have
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to force an update.
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To force an update of all dependency information remove the
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`.depend' file from each directory and type `make depend'. For
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instance:
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$ find . -name .depend -exec rm {} \;
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$ make depend
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* Object files stay in the directory and are added to the library as a
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final step instead of placing the file in the library immediately
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and removing it from the directory. The reason is two-fold:
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1. Most versions of make don't allow `$(LIB)($(SRC:.c=.o))'
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which makes it necessary to have two lists of files, one
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that ends with `.c' and the other that has the library
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name wrapped around each `.o' file.
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2. Some versions of make/ar have problems with modifications
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times of archive members.
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