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string into the strcache. As a side-effect, many more structure members and
function arguments can/should be declared const.
As mentioned in the changelog, unfortunately measurement shows that this
change does not yet reduce memory. The problem is with secondary expansion:
because of this we store all the prerequisites in the string cache twice.
First we store the prerequisite string after initial expansion but before
secondary expansion, then we store each individual file after secondary
expansion and expand_deps(). I plan to change expand_deps() to be callable
in either context (eval or snap_deps) then have non-second-expansion
targets call expand_deps() during eval, so that we only need to store that
dependency list once.
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- Add more warnings.
- Rename variables that mask out-scope vars with the same name.
- Remove all casts of return values from xmalloc, xrealloc, and alloca.
- Remove casts of the first argument to xrealloc.
- Convert all bcopy/bzero/bcmp invocations to use memcp/memmove/memset/memcmp.
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Added new file strcache.c to various non-UNIX makefiles and build scripts.
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I decided this feature was too impacting to make the permanent default
behavior. This set of changes makes the default behavior of make the
old behavior (no second expansion). If you want second expansion, you
must define the .SECONDEXPANSION: special target before the first target
that needs it.
This set of changes ONLY fixes explicit and static pattern rules to work
like this. Implicit rules still have second expansion enabled all the
time: I'll work on that next.
Note that there is still a backward-incompatibility: now to get the old
SysV behavior using $$@ etc. in the prerequisites list you need to set
.SECONDEXPANSION: as well.
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I did this by adding intelligence into the algorithm such that the
second expansion was only actually performed when the prerequisite list
contained at least one "$", so we knew it is actually needed.
Without this we were using up a LOT more memory, since every single
target (even ones never used by make) had their file variables
initialized. This also used a lot more CPU, since we needed to create
and populate a new variable hash table for every target.
There is one issue remaining with this feature: it leaks memory. In
pattern_search() we now initialize the file variables for every pattern
target, which allocates a hash table, etc. However, sometimes we
recursively invoke pattern_search() (for intermediate files) with an
automatic variable (alloca() I believe) as the file. When that function
returns, obviously, the file variable hash memory is lost.
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A number of W32 cleanups from J.Grant.
A number of OS/2 cleanups from Andreas Buening.
Various random bug fixes.
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Small fixes for W32 (from Jonathan Grant <jg-make@jguk.org>)
Maintainer enhancements to clean up the tree.
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- Fix some uncleanliness about the implementation of patterns-specific vars.
- Some enhancements to the OS/2 port.
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enable the automake ansi2knr capability.
Right now this doesn't quite build using a K&R compiler because of a
problem with the loadavg test program, but the rest of the code works. I'm
asking the automake list about this problem.
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Incorporate "order-only" prerequisites patch. Wrote a test for it.
The test shows what might be a bug in the code; I need to look at it
more closely (anyway it doesn't behave as I expected). Also I haven't
done the docs yet.
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Fixed some translation string issues.
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* Keep filename/lineno information for variables, for debugging.
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* Apply changes from Paul Eggert.
* Many other cleanups (index/rindex --> strchr/strrchr, etc.)
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* Various code cleanups.
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targets need to have their modtimes rechecked (-n, etc.)
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Don't choke on invalid pattern rules if we fail during makefile parsing.
Don't dump core if a non-empty command becomes empty after expansion.
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* GNUmakefile (globfiles): Add AmigaDOS support files.
(distfiles): Add $(amigafiles).
(amigafiles): New variable.
Thu Nov 7 10:18:16 1995 Aaron Digulla <digulla@fh-konstanz.de>
* Added Amiga support in commands.c, dir.c, function.c,
job.c, main.c, make.h, read.c, remake.c
* commands.c: Amiga has neither SIGHUP nor SIGQUIT
* dir.c: Amiga has filenames with Upper- and Lowercase,
but "FileName" is the same as "filename". Added strieq()
which is use to compare filenames. This is like streq()
on all other systems. Also there is no such thing as
"." under AmigaDOS.
* function.c: On Amiga, the environment is not passed as envp,
there are no pipes and Amiga can't fork. Use my own function
to create a new child.
* job.c: default_shell is "" (The system automatically chooses
a shell for me). Have to use the same workaround as MSDOS for
running batch commands. Added HAVE_SYS_PARAM_H. NOFILE isn't
known on Amiga. Cloned code to run children from MSDOS. Own
version of sh_chars[] and sh_cmds[]. No dup2() or dup() on Amiga.
* main.c: Force stack to 20000 bytes. Read environment from ENV:
device. On Amiga, exec_command() does return, so I exit()
afterwards.
* make.h: Added strieq() to compare filenames.
* read.c: Amiga needs special extension to have passwd. Only
one include-dir. "Makefile" and "makefile" are the same.
Added "SMakefile". Added special code to handle device names (xxx:)
and "./" in rules.
* remake.c: Only one lib-dir. Amiga link-libs are named "%s.lib"
instead of "lib%s.a".
* main.c, rule.c, variable.c: Avoid floats at all costs.
* vpath.c: Get rid of as many alloca()s as possible.
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Merged VMS port from Klaus Kaempf <kkaempf@didymus.rmi.de>.
* make.h (PARAMS): New macro.
* config.h-vms: New file.
* makefile.com: New file.
* makefile.vms: New file.
* readme.vms: New file.
* vmsdir.h: New file.
* vmsfunctions.c: New file.
* vmsify.c: New file.
* file.h: Renamed to filedef.h to avoid conflict with VMS system hdr.
* ar.c: Added prototypes and changes for VMS.
* commands.c: Likewise.
* commands.h: Likewise.
* default.c: Likewise.
* dep.h: Likewise.
* dir.c: Likewise.
* expand.c: Likewise.
* file.c: Likewise.
* function.c: Likewise.
* implicit.c: Likewise.
* job.c: Likewise.
* job.h: Likewise.
* main.c: Likewise.
* make.h: Likewise.
* misc.c: Likewise.
* read.c: Likewise.
* remake.c: Likewise.
* remote-stub.c: Likewise.
* rule.c: Likewise.
* rule.h: Likewise.
* variable.c: Likewise.
* variable.h: Likewise.
* vpath.c: Likewise.
* compatMakefile (srcs): Rename file.h to filedef.h.
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