| Commit message (Collapse) | Author | Age | Files | Lines |
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is long but I hate to lose the information so I am including it here.
> I am still fixing and recompiling but this is the issue that was not the
> result of another patch. This is a fundamental build issue that I value
> your opinion on.
This is difficult issue (I.e. I have no destinct solution for it)
Background:
(gnu-) make's implicit rules apply CFLAGS, CPPFLAGS, CXXFLAGS, ASFLAGS and
LDFLAGS (cf. make.info/Implicit Rules/Catalogue of Rules), only.
In brief:
CPPFLAGS .. passed to the c-preprocessor
CFLAGS ... passed to the c-compiler
CXXFLAGS ... equivalent to CFLAGS but passed to the c++ compiler
(Attention: CFLAGS is not passed to the c++ compiler)
ASFLAGS .. equivalent to CFLAGS, but passed to the assembler
LDFLAGS .. equivalent to CFLAGS, but passed to the linker
A bit oversimplifying, these make rules are as follows
.c.o:
$(CC) $(CPPFLAGS) $(CFLAGS) -c
.cc.o:
$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c
.S.s:
$(CPP) $(CPPFLAGS)
.s.o:
$(AS) $(ASFLAGS)
My reading of the documentation (make.info) is that {AS|AR|CC|CXX|CPP}FLAGS
are ment to be passed to the related tools directly, however examinating
the rule set of gmake (gmake -p -f /dev/null") shows that many rules use
$(CC) instead of the related tools (eg. linker rules) etc.
I.e. these flags should not rely on being passed through cpp or gcc. With
gcc being the common frontend for all of these tools of a gnu-toolchain the
situation becomes difficult (Which option is passed to whom and which tool
really uses it?), because these variable can also contain the toolchain's
frontend (eg. AS=gcc, LD=gcc, CPP=gcc -E).
For some commonly used options the situation is quite clear:
* -g -> CFLAGS
* -OX -> CFLAGS
* -D -> CPPFLAGS
* -A -> CPPFLAGS
But where to add -m, -B, -specs, -qrtems_XXX ?
* -B, -specs, -qrtems_XXX are gcc-frontend options
* -m is a combinations of flags to go to different destinations, in many
(all?) cases, the following is valid
-m is expanded by gcc into a set of -D and -A options
-m is interpreted by cc1 as a machine flag to generate a specific
instruction set.
-m is interpreted by gcc as an implicit linker search path for multilibs to
set up calls to LD.
>From my point of view this indicates we can either destingush between these
different usages (= separately add -m to CFLAGS, LDFLAGS etc) or to add it
to CPPFLAGS and use gcc (the frontend) instead of calling each tool
directly (less error prone) -- I vote for CPPFLAGS, but I am not sure.
-----------------
Now, where to add CPU_CFLAGS?
AFAIS, in probably all cases CPU_CFLAGS contain -D -A, and -m options,
only.
* -D and -A are supposed to go to CPPFLAGS
* -mXXX options can have multiple meanings (It can be gcc, collect2/ld and
cc1/cc1plus option simultaneously)
Here, I made a mistake - I destinguished between CPU_DEFINES to be added to
CPPFLAGS and CPU_CFLAGS to be added to CFLAGS and CXXFLAGS (cf.
gcc-target-default.cfg), generally assuming CPU_CFLAGS are CFLAGS.
This breaks preprocessing *.S into *.i files because CPU_CFLAGS flags were
not added to CPPFLAGS. Hence *all* *.S were compiled without taking
-mXX-flags into account. The i960/cvme BSP was the only one which
explicitly checked for a specific -m flag (-mca) and refused to compile
without it -- all other CPUs/BSPs silently swallowed this.
IMO, we can either
1) add CPU_CFLAGS and CPU_DEFINES to CPPFLAGS, thus silently convert
CPU_CFLAGS's meaning into CPU_DEFINES (Alternative solution: rename
CPU_CFLAGS to CPU_DEFINES and merge CPU_FLAGS with CPU_DEFINES).
or
2) destinguish between CPU_DEFINES and CPU_CFLAGS. In this case we would
need to check the contents of each CPU_CFLAGS in custom/*.cfg and move the
some parts of the contents to CPU_DEFINES and keep other parts in
CPU_CFLAGS (CFLAGS must contain options for the c/c++-compiler only!).
Though Solution 2) is the clearer one, I implemented 1) which is the
simplier one (the patch below).
ATTENTION: This patch is small in size, but affects almost everything.
------------
Additional complications araise with linking:
Some BSPs call LD and AS directly (esp. gcc-2.7 make-exe rules). If LD=gcc
then LDFLAGS are supposed to be gcc-options, but if LD=ld then LDFLAGS is
supposed to contain ld-options.
An analog thought is valid for AS, but luckily enough ASFLAGS is not used
of inside the whole source tree.
Most RTEMS' custom/*.cfg use $(CC) $(CFLAGS) to link with gcc-2.8 make-exe
rules. With the patch below (CPU_CFLAGS added to CPPFLAGS) this means
CPU_CFLAGS will not be passed to the linker, which is incorrect for
multilibbed CPU's.
gmake's default rule set contains a variety of rules for linking, all
ending up in calling $(CC) $(LDFLAGS) for linking at their very end.
IMO, this means we should use something like
LINK.o = $(CC) $(LDFLAGS) in gcc-target-default.cfg
+ modify all gcc-2.8 make-exe rules to use
$(LINK.o) .......
+ setup LDFLAGS according to the requirements of the above.
I.e. we should use $(CC) for linking instead of calling the linker (LD)
directly and set LDFLAGS = $(CPPFLAGS) $(CFLAGS) or similar.
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> 5) rtems-rc-19990202-1.diff/reorg-install.sh
>
> reorg-install.sh fixes a Makefile variable name clash of RTEMS
> configuration files and automake/autoconf standards.
> Until now, RTEMS used $(INSTALL) for install-if-change. Automake and
> autoconf use $(INSTALL) for a bsd-compatible install. As
> install-if-change and bsd-install are not compatible, I renamed all
> references to install-if-changed to $(INSTALL_CHANGED) and used
> $(INSTALL) for bsd-install (==automake/autoconf standard). When
> automake will be introduced install-if-change will probably be replaced
> by $(INSTALL) and therefore will slowly vanish. For the moment, this
> patch fixes a very nasty problem which prevents adding any automake file
> until now (There are still more).
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> 3) rtems-rc-19990131-2.diff
>
> This patch removes generating bsp_specs from leaf.cfg and generates
> bsp_specs from inside of c/Makefile instead.
>
> The motivation behind this patch is to avoid "polluting" Makefiles by
> unneccessary rules from included Makefile-fragments (*.cfg-files) and
> try to handle files by explicit rules in Makefiles instead (FYI:
> automake-1.4 physically includes Makefile fragments at the time
> automake is run, not at the time make is run as RTEMS Makefile.ins do
> now)
>
> Nevertheless, this patch is rather uncritical, almost cosmetical - If
> you don't like it, then dump it ;-, however I doubt that subsequent
> patches will apply then ;-.
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> 2) rtems-rc-19990131-1.diff
>
> Rework of compilers/*.cfg files (esp. gcc-target-default.cfg) to adapt
> the flags/makefile variables to automake and make standards (cf.
> make.info - implicit rules/variables).
>
> This patch is rather risky and may probably break things, but is an
> essential step towards automake.
>
> FWIW: It also reverts the i386-ASMFLAGS/ASFLAGS-patch, which was wrong,
> as I had to experience ;-.
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> Adds variables to the custom/*cfg files to specify the location of
> tools. The purpose is to remove hard-coded paths from the Makefiles.
>
> In later steps this eases moving the tools to other locations.
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<corsepiu@faw.uni-ulm.de>.
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./clock/clock.c,v
./console/Makefile.in,v
./console/config.c,v
./console/console.c,v
./console/console.h,v
./console/debugio.c,v
./console/i8042.c,v
./console/i8042_p.h,v
./console/i8042vga.c,v
./console/i8042vga.h,v
./console/ns16550.c,v
./console/ns16550.h,v
./console/ns16550_p.h,v
./console/ns16550cfg.c,v
./console/ns16550cfg.h,v
./console/vga.c,v
./console/vga_p.h,v
./console/z85c30.c,v
./console/z85c30.h,v
./console/z85c30_p.h,v
./console/z85c30cfg.c,v
./console/z85c30cfg.h,v
./include/Makefile.in,v
./include/bsp.h,v
./include/chain.h,v
./include/coverhd.h,v
./include/extisrdrv.h,v
./include/nvram.h,v
./include/pci.h,v
./include/tod.h,v
./network/Makefile.in,v
./network/amd79c970.c,v
./network/amd79c970.h,v
./nvram/Makefile.in,v
./nvram/ds1385.h,v
./nvram/mk48t18.h,v
./nvram/nvram.c,v
./nvram/prepnvr.h,v
./nvram/stk11c68.h,v
./pci/Makefile.in,v
./pci/pci.c,v
./start/Makefile.in,v
./start/start.s,v
./startup/Makefile.in,v
./startup/bspclean.c,v
./startup/bspstart.c,v
./startup/bsptrap.s,v
./startup/device-tree,v
./startup/genpvec.c,v
./startup/linkcmds,v
./startup/rtems-ctor.cc,v
./startup/sbrk.c,v
./startup/setvec.c,v
./startup/spurious.c,v
./startup/swap.c,v
./timer/Makefile.in,v
./timer/timer.c,v
./tod/Makefile.in,v
./tod/cmos.h,v
./tod/tod.c,v
./universe/Makefile.in,v
./universe/universe.c,v
./vectors/Makefile.in,v
./vectors/README,v
./vectors/align_h.s,v
./vectors/vectors.s,v
./wrapup/Makefile.in,v
./Makefile.in,v
./README,v
./STATUS,v
./bsp_specs,v
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based board.
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hack through some paths to check error checking paths without a network
driver.
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of removal of unused function code found in newer binutils/egcs
snapshots. Early test with psim and hello.exe showed about a 13%
gain.
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used in gcc.
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.s files to .S in conformance with GNU conventions. This is a
minor step along the way to supporting automake.
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and RPC support to RTEMS. Thanks. :) Email follows:
Hello,
For Xmas, here is the Remote Debugger on RTEMS !
Here are 2 patches for the Remote Debugger on RTEMS for pc386 from Linux
host :
- one for RTEMS it self,
- one for GDB-4.17.
1/ RTEMS patch
--------------
This patch adds 2 libraries :
- a simplified SUN RPC library
- the Remote Debugger library
The configuration command is the following :
../rtems4/configure --target=i386-rtemself --enable-rtemsbsp=pc386
--enable-rdbg
The SUN RPC library is built only if networking is set.
The RDBG library is built if networking and enable-rdbg are set.
The function used to initialize the debugger is :
rtems_rdbg_initialize ();
A special function has been created to force a task to be
in a "debug" state : enterRdbg().
The use of this function is not mandatory.
2/ GDB-4.17 patch
-----------------
This patch create a new RTEMS target for GDB-4.17.
The configuration command is the following :
./configure --enable-shared --target=i386RTEMS
To connect to a target, use :
target rtems [your_site_address]
Then, attach the target using : attach 1
And... Debug ;)
You can obtain the original GDB-4.17 on
ftp://ftp.debian.org/debian/dists/stable/main/source/devel/gdb_4.17.orig.tar.gz
This has been tested from a Debian 2.0.1 linux host.
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it work.
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I use the m68k/efi332 BSP together with a home made board. After some
time of debugging I found that the m68020 CPU is used to build rtems.
This is not correct, because the 68332 does not have some of the 68020
features (no separate int stack ...). It is necessary to change this to
mcpu32. After a clean/make everything works fine.
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with libchip.
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Please find attached a new i386ex.cfg. It has been altered to change
the files that get generated with the .nxe extension to .coff. This
change is necessary to align the file names generated by "make-exe" to
the those referred to in the GDB.HOWTO found in the
i386/shared/comm directory. It has been successfully tested on ticker (
without GDB), and base_sp( with GDB ) . I just set a breakpoint and
continue...
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1. Rtems contains some perl scripts that use hard-coded paths to
/usr/bin/perl or /usr/local/bin/perl I have already fixed these
problems by adding some checks to configure.in. While doing this,
I also cleaned up some more autoconf related problems for generating
shell scripts. This patch might seem a bit scary to you, but I am
quite confident it won't break something (I've been testing it for
almost a week now, however it might introduce typos for a limited
number configurations I don't have access to - But it shouldn't be
a problem for you to test them :-).
I expect to get this finished tonight, hence you will very likely
have the patch when you get up tomorrow.
Changes:
* Check for PERL and disable all PERL scripts if perl wasn't found.
* Generate all KSHELL-scripts with autoconf instead of make-script
* Automatic dependency handling for autoconf generated KSHELL or PERL
scripts (make/rtems.cfg)
Notes:
* this patch contains new files and deletes some other files.
* The patch is relative to rtems-4.0.0-beta4 with my previous
rtems-rc-981014-1.diff patch applied.
Testing:
I tested it with sh-rtems and posix under linux. Now all targets
which are touched by this patch and which are not used while building
for sh-rtems and posix still need to be tested. AFAIS, only the
sparc/erc32 BSP should be affected by this criterion. And if you
like to, you should also consider testing it on a Cygwin32 and a
Solaris host for one arbitrary BSP.
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2. "make profile" doesn't work. It aborts when building host-tools
for embedded targets. I didn't yet have enough time to fix this
problem. AFAIS this problem is related to handling of
LDFLAGS_PROFILE[|_V] in gcc.cfg.in. For host applications, we use
gcc for linking host applications, too. With profiling enabled
CFLAGS_PROFILE_V contains -pg and is used to compile, but
LDFLAGS_PROFILE_V is empty, hence -pg will not be passed to the
linker causing gcc to fail to link, because it can't resolve some
symbols introduced by compiling with -pg.
I am not sure if I can provide a patch for this - Ether it is trivial
to fix or requires basic work on host configuration ;-
Fixing this one was trivial - But hard to trace.
LDFLAGS_PROFILE_V needs to contain the same flags as CFLAGS_PROFILE_V,
if gcc is used for linking (What else should have been expected ?,
:-). The same problem was present for *_DEBUG_V, but apparently wasn't
noticed by anybody, because things didn't break, but were silently
ignored.
I fixed these problems by setting these flags in configure.in whenever
gcc is reported to be the host-compiler. For non-gcc host compilers
"make debug" and "make profile" now becomes the same as an ordinary
"make". This is a hack and addressing this problen could be more
sophisticated, but I don't think it gives much sense to support
compile variants for any host program (Who will ever try to
profile/debug host tools?). Therefore I don't think it's useful
to invest more effort into this problem.
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cosmetic things.
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As mentioned in other mails before, there is are minor inconsistencies in the
posix custom/*cfg files.
Linux-posix.cfg sets RTEMS_BSP=posix
FreeBSD-posix.cfg sets RTEMS_BSP=posix
Solaris-posix.cfg first sets RTEMS_BSP=posix, later it sets
RTEMS_BSP=solaris2
1. Setting RTEMS_BSP=posix is redunant to settings in default.cfg
2. The solaris variant of setting RTEMS_BSP is merely non-functional.
The patch attached to this mail should clean up this issue.
The patch was tested by building the posix bsp under
i686-pc-linux-glibc1/glibc2 and Solaris2.6 (I did not run any
rtems program, however) The HPUX9 and FreeBSD configuration files
were adapted in analogy to the solaris and linux configurations.
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Here's a patch to get rid of the `#define RTEMS__mcpu32p__ 1' when
gen68360.cfg is being used as a companion for gen68360_040.cfg. The
old version worked because of the order of the conditional tests in
m68k.h (the check for __mc68040__ is before the test for
RTEMS__mcpu32p__) , but I think it might have been a little confusing
to others just getting started.
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Finally I am through: I have found the last bugs that made RTEMS-
4.0-beta3 start on my ppc403 board from ROM. So now the '403
support is up to date again.
Roughly I have added the following features:
- support for the on-chip interrupt controller (in a separate module)
- interrupt support for the console device
- termios support for the console device
==============================================
Since the BSP behaivour changed in some details (console no
longer is polling, other memory layout etc) I have created a new
BSP "helas403" rather than changing the "papyrus" BSP. The old
"polled" console driver still sticks around in "console.c.polled"
To get the BSP up and running, I had to create the new BSP files
(derived from papyrus). Besides that, the following source areas
have been changed:
- c/src/lib/libcpu/powerpc/ppc403: changes to console driver, small
changes to clock driver, new "ictrl" interrupt controller driver
- c/src/exec/score/cpu/powerpc/ppc.h: some small changes
(added ppc403 characteristics like a exception vector prefix
register, some special register definitions). I am quite sure, they
are compatible with the existing sources, although I did not check
- c/src/exec/score/cpu/powerpc/cpu.c: There is one severe
limitation in the exception entries: Due to the current code
arrangement, the "branch absolute" to the ISR handler may only
jump to the first 128MByte or the last 128MByte of the 4GByte
address range. When the ppc403 is running out of ROM, the ROM
functions are located in the last 128MByte (0xFFF00000 and up).
These addresses were not handled correctly (sign reduced) in
"install_raw_handler". The change I added should work on existing
ppc BSPs aswell...
- c/src/lib/libc/termios.c: During my tests, I added one change you
sent me, so this patch will already be incorporated in the current
source tree.
There are some smaller changes, see the attached diff file.
=========================================
Concerning the GNU toolchain:
I tried several tool chains. Finally I almost succeeded with
egcs-1.0.3a with patch egcs-1.0.3-rtems-diff-19980527
I had to add the following lines to the egcs files. Without them
configure complaint that the cross compiler could not generate
executable output.
- additional lines needed in egcs distribution in file
gcc/config/rs6000/rtems.h:
+++ lines start
#undef STARTFILE_DEFAULT_SPEC
#define STARTFILE_DEFAULT_SPEC "ecrti.o%s"
#undef ENDFILE_DEFAULT_SPEC
#define ENDFILE_DEFAULT_SPEC "ecrtn.o%s"
++++ lines end
As far as I have seen in the Changelog of egcs, you have recently
sent two patches affecting the powerpc support, but they were
added in the wrong order.... :-(
egcs-19980628 with patch egcs-19980628-rtems-diff-19980707 does
not work!
I used binutils 2.9.1 with patch binutils-2.9.1-rtems-diff-19980515
(binutils 2.8.1 does not work, internal error in gas)
and newlib-1.8.0 with patch newlib-1.8.0-rtems-diff-19980707
Finally I had to poke a line in the "bit" script, since, on my LINUX
machine, the GNU make is only available as "make", not as
"gmake"...
For all the tools and newlib I selected configuration "powerpc-
rtems".
--------------------------------------------
IMD Ingenieurbuero fuer Microcomputertechnik
Thomas Doerfler Herbststrasse 8
D-82178 Puchheim Germany
email: td@imd.m.isar.de
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I found that my 68040/68360 test programs would not run even after
I fixed the `wrong BSP' problem.
It seems that there's a bug in the interrupt handling code for
processors with hardware interrupt stacks (e.g. 68040). The wrong
status register was getting pushed on the stack for the `return
from exception' to call _ISR__Dispatch. This ended up making
the context switch code run on the interrupt stack, so interrupt-driven
context switches would always fail.
I guess that no one has tried running any of the RTEMS-4.0 snapshots
on a 68040 machine!
Anyhow, here are the patches for
1) gen68360.cfg --- to fix the `wrong-BSP' problem.
2) m68k/cpu_asm.s --- to fix the hardware interrupt stack problem.
With these patches in place, the network demo programs run on my
68040/68360 system. The paranoia program runs with no failures,
defects nor flaws.
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1. Finally fixes raw interrupts for pc386
2. Makes some minor cleanup in console and startup
3. Makes rtems_termios_dequeue_characters() to return count of
outstanding chars - it allows to simplify console isrs a little
bit.
4. pc386 uart modified to be friendlier to termios parameter changes,
to have minor performance improvement and to take advantage of
of above termios modification.
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of the SONIC driver to the new FreeBSD stack instead of KA9Q.
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I have managed to build the bsp ods68302 and the rtti test case I made
with egcs-1.1b and binutils-2.9.1.
I have built our C++ application and got no link errors so it looks like
this is now working. I am yet to test the code but getting the thing to
link was the problem.
Please find a patch attached which removes the -fno-rtti option.
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The patch (rtems-rc-980821.diff) I had sent recently to fix the "make
install" problem in rtems-980821/make/ still contained a bug (Thanks to
Eric N. for reporting it).
The patch enclosed to this mail is a corrected version of this patch,
which finally should fix this problem.
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Here is another patch to hopefully enhance rtems' configuration.
Motivation: Try to support other c-compilers besides gcc (I tried to
build rtems under Solaris using sun's WSPro c-compiler).
Here is a couple of small patches concerning the host compiler
configuration, which fix/work-around the worst problems when using sun's
WSPro c-compiler.
Changes:
* Replaced make/compilers/gcc.cfg with make/compilers/gcc.cfg.in, ie.
gcc.cfg is generated by configure now.
* Removed a line containing a hard-coded "gcc" from gcc.cfg (BUG-fix).
* Add -g to host compiler flags only if configure reported -g to work
* Add -Wall to host compiler flags only if configure reported that the
host compiler is gcc (WSPro's cc chokes on -Wall).
* Some modifications to make/Makefile.in
* Adapted make/custom/default.cfg to the new location of gcc.cfg
BTW, gcc.cfg/gcc.cfg.in seems to be full of unused code (DEBUG-VARIANTS
etc.) which deserves to be cleaned up, IMO.
IMO, a similar patch should be applied to gcc-target-default.cfg
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It fixes netboot build problem, KA9Q configuration
for pc386, some compiler wardning, it also removed some stuff
ifdef'ed with '#if 0'.
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make solaris target buildable.
> 1. The ipc check fails since solaris does not define union semun.
> The unix port code actually defines this type itself on solaris. Doing
> the same thing lets it get configured. Then...
> 2. It looks like BSDINSTALL is not defined properly.
BSDINSTALL is defined in make/host.cfg.in as
BSDINSTALL=@INSTALL@
@INSTALL@ is generated by autoconf's standard macro AC_PROG_INSTALL, which
is widely used in almost any autoconf/automake configured package. In case
there is really something wrong with it, then it must be considered a bug
in autoconf.
I can see a doubious fragment in AC_PROG_INSTALL, which is used when no
appropriate bsd-install is found.
Finally Ralf saw a problem with the find on solaris which I also saw and
fixed.
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CPU_ASFLAGS.
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<raguet@crf.canon.fr> to make their patches work together.
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