I would like to define PLATFORM64 if SIZEOF_VOIDP equals 8, the configure snippet below don't work but shows what I would like to achieve. Is there a way of doing this in my configure script?
# Get size of void*
AC_CHECK_SIZEOF(void*)
# Determine if this is a 32 or 64 bit system, this can also be set manually with "-DPLATFORM64"
AM_CONDITIONAL([PLATFORM64], [test SIZEOF_VOIDP = 8])
Update:
I've tried:
AM_CONDITIONAL([PLATFORM64], [test "$SIZEOF_VOIDP" -eq 8])
but I get "test: bad number" error message.
The problem is that AC_CHECK_SIZEOF is defining a preprocessor directive, not setting a shell variable. You could try testing $host_cpu after calling AC_CANONICAL_HOST.
Alternatively:
AC_PREPROC_IFELSE([AC_LANG_SOURCE([
#if SIZEOF_VOIDP != 8
#error
#endif
])], [platform64=true], [platform64=false])
AM_CONDITIONAL([PLATFORM64], [test "$platform64" = true])
Related
I'm working on a little learning project,need to call "getgroups(int gidsetsize, gid_t grouplist[])"
I'v got "0" result of an id should have a list.
while checking all possibilities,I found out the user's group must not be "0",or the function won't return none 0 result.
but i'm only meet this problem on my own computer which running archlinux.
I checked virtual machine which use manjaro or ubuntu,none of them has the problem ,
a co-league has an vps which use arch too do not has the problem.
arch bbs replied "the gid of user should not be 0",but it couldn't explain why my machine is the only one has the problem.
I'v compared id output before the post.
Only the physical machine give me NULL list,and the strace output is different
my machine result
rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
getgroups(0, NULL) = 0
getgroups(0, []) = 0
newfstatat(AT_FDCWD, "/etc/nsswitch.conf", {st_mode=S_IFREG|0644, st_size=359, ...}, 0) = 0
other machine's the first getgroups will return none 0 result,and then,the 2nd will use the result as the 1st para to get a list.
I couldn't find the difference by myself.
The ubuntu vm result
getgroups(0, NULL) = 7
getgroups(7, [0, 4, 24, 27, 30, 46, 110]) = 7
"id" command only return the none zero result to get "self" result but not other's because of different execution branch.
Tried edit the user's gid to none 0,after reboot,the result going to normal
Change gid back to 0 again,after reboot,the result is NULL again.
Might be something about user namespace?
Any suggestions?
edit,more info:
Seems the problem is related to "WHO IS THE FATHER".
When the process is child(or grand child etc.) of
/usr/lib/systemd/systemd --user
getgroups will give bad result.
When not(running on i3wm ,the process has no father)the result is good
following the trace of systemd,arch bbs give me this.
User service not running with supplementary groups
------------EDIT---------------
It's not the same problem,possible another bug.
I need to compose a simple rmarkdown file, with text, code and the results of executed code included in a resulting PDF file. I would prefer if the source file is executable and self sifficient, voiding the need for a makefile.
This is the best I have been able to achieve, and it is far from good:
#!/usr/bin/env Rscript
library(knitr)
pandoc('hw_ch4.rmd', format='latex')
# TODO: how to NOT print the above commands to the resulting .pdf?
# TODO: how to avoid putting everyting from here on in ""s?
# TODO: how to avoid mentioning the file name above?
# TODO: how to render special symbols, such as tilde, miu, sigma?
# Unicode character (U+3BC) not set up for use with LaTeX.
# See the inputenc package documentation for explanation.
# nano hw_ch4.rmd && ./hw_ch4.rmd && evince hw_ch4.pdf
"
4E1. In the model definition below, which line is the likelihood?
A: y_i is the likelihood, based on the expectation and deviation.
4M1. For the model definition below, simulate observed heights from the prior (not the posterior).
A:
```{r}
points <- 10
rnorm(points, mean=rnorm(points, 0, 10), sd=runif(points, 0, 10))
```
4M3. Translate the map model formula below into a mathematical model definition.
A:
```{r}
flist <- alist(
y tilda dnorm( mu , sigma ),
miu tilda dnorm( 0 , 10 ),
sigma tilda dunif( 0 , 10 )
)
```
"
Result:
What I eventually came to use is the following header. At first it sounded neat, but later I realized
+ is indeed easy to compile in one step
- this is code duplication
- mixing executable script and presentation data in one file is a security risk.
Code:
#!/usr/bin/env Rscript
#<!---
library(rmarkdown)
argv <- commandArgs(trailingOnly=FALSE)
fname <- sub("--file=", "", argv[grep("--file=", argv)])
render(fname, output_format="pdf_document")
quit(status=0)
#-->
---
title:
author:
date: "compiled on: `r Sys.time()`"
---
The quit() line is supposed to guarantee that the rest of the file is treated as data. The <!--- and --> comments are to render the executable code as comments in the data interpretation. They are, in turn, hidden by the #s from the shell.
I wish to generate a lot of --enable-*/--disable-* options by something like:
COMPONENTS([a b c], [yes])
where the second argument is the default value of the automatic enable_* variable. My first attempt was to write an AC_ARG_ENABLE(...) within an m4_foreach_w, but so far, I'm only getting the first component to appear in the ./configure --help output.
If I add hand-written AC_ARG_ENABLEs, they work as usual.
Regardless, the --enable-*/--disable-* options work as they should, just the help text is missing.
Here's the full code to reproduce the problem:
AC_INIT([foo], 1.0)
AM_INIT_AUTOMAKE([foreign])
AC_DEFUN([COMPONENTS],
[
m4_foreach_w([component], [$1], [
AS_ECHO(["Processing [component] component with default enable=$2"])
AC_ARG_ENABLE([component],
[AS_HELP_STRING([--enable-[]component], [component] component)],
,
[enable_[]AS_TR_SH([component])=$2]
)
])
AC_ARG_ENABLE([x],
[AS_HELP_STRING([--enable-[]x], [component x])],
,
[enable_[]AS_TR_SH([x])=$2]
)
AC_ARG_ENABLE([y],
[AS_HELP_STRING([--enable-[]y], [component y])],
,
[enable_[]AS_TR_SH([y])=$2]
)
])
COMPONENTS([a b c], [yes])
for var in a b c x y; do
echo -n "\$enable_$var="
eval echo "\$enable_$var"
done
AC_CONFIG_FILES(Makefile)
AC_OUTPUT
And an empty Makefile.am. To verify that the options work:
$ ./configure --disable-a --disable-b --disable-d --disable-x
configure: WARNING: unrecognized options: --disable-d
...
Processing component a with default enable=yes
Processing component b with default enable=yes
Processing component c with default enable=yes
$enable_a=no
$enable_b=no
$enable_c=yes
$enable_x=no
$enable_y=yes
After I poked around in autoconf sources, I figured out this has to do with the m4_divert_once call in the implementation of AC_ARG_ENABLE:
# AC_ARG_ENABLE(FEATURE, HELP-STRING, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
# ------------------------------------------------------------------------
AC_DEFUN([AC_ARG_ENABLE],
[AC_PROVIDE_IFELSE([AC_PRESERVE_HELP_ORDER],
[],
[m4_divert_once([HELP_ENABLE], [[
Optional Features:
--disable-option-checking ignore unrecognized --enable/--with options
--disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
--enable-FEATURE[=ARG] include FEATURE [ARG=yes]]])])dnl
m4_divert_once([HELP_ENABLE], [$2])dnl
_AC_ENABLE_IF([enable], [$1], [$3], [$4])dnl
])# AC_ARG_ENABLE
# m4_divert_once(DIVERSION-NAME, CONTENT)
# ---------------------------------------
# Output CONTENT into DIVERSION-NAME once, if not already there.
# An end of line is appended for free to CONTENT.
m4_define([m4_divert_once],
[m4_expand_once([m4_divert_text([$1], [$2])])])
I'm guessing that the HELP-STRING argument is remembered in it's unexpanded form, so it is added just once for all components. Manually expanding the AC_HELP_STRING does what I want:
AC_DEFUN([COMPONENTS],
[
m4_foreach_w([comp], [$1], [
AS_ECHO(["Processing component 'comp' with default enable=$2"])
AC_ARG_ENABLE([comp],
m4_expand([AS_HELP_STRING([--enable-comp], enable component comp)]),
,
[enable_[]AS_TR_SH([comp])=$2]
)
])
])
COMPONENTS([a b c x y], [yes])
I couldn't find a way to properly quote components so that it appears as a string, after being used as the loop variable in m4_foreach_w, so I just renamed it to spare me the trouble.
When I type "lshosts" I am given:
HOST_NAME type model cpuf ncpus maxmem maxswp server RESOURCES
server1 X86_64 Intel_EM 60.0 12 191.9G 159.7G Yes ()
server2 X86_64 Intel_EM 60.0 12 191.9G 191.2G Yes ()
server3 X86_64 Intel_EM 60.0 12 191.9G 191.2G Yes ()
I am trying to return maxmem and maxswp as megabytes, not gigabytes when lshosts is called. I am trying to send Xilinx ISE jobs to my LSF, however the software expects integer, megabyte values for maxmem and maxswp. By doing debugging, it appears that the software grabs these parameters using the lshosts command.
I have already checked in my lsf.conf file that:
LSF_UNIT_FOR_LIMTS=MB
I have tried searching the IBM Knowledge Base, but to no avail.
Do you use a specific command to specify maxmem and maxswp units within the lsf.conf, lsf.shared, or other config files?
Or does LSF force return the most practical unit?
Any way to override this?
LSF_UNIT_FOR_LIMITS should work, if you completely drained the cluster of all running, pending, and finished jobs. According to the docs, MB is the default, so I'm surprised.
That said, you can use something like this to transform the results:
$ cat to_mb.awk
function to_mb(s) {
e = index("KMG", substr(s, length(s)))
m = substr(s, 0, length(s) - 1)
return m * 10^((e-2) * 3)
}
{ print $1 " " to_mb($6) " " to_mb($7) }
$ lshosts | tail -n +2 | awk -f to_mb.awk
server1 191900 159700
server2 191900 191200
server3 191900 191200
The to_mb function should also handle 'K' or 'M' units, should those pop up.
If LSF_UNIT_FOR_LIMITS is defined in lsf.conf, lshosts will always print the output as a floating point number, and in some versions of LSF the parameter is defined as 'KB' in lsf.conf upon installation.
Try searching for any definitions of the parameter in lsf.conf and commenting them all out so that the parameter is left undefined, I think in that case it defaults to printing it out as an integer in megabytes.
(Don't ask me why it works this way)
What is the purpose for OptionArg.
Please provide documentation for the same.
And what does the following code signify:
const OptionEntry[] options = {
{"wide", 'w', 0, OptionArg.NONE, ref wide, N_("Enable wide mode"), null },
{"device", 'd', 0, OptionArg.FILENAME, ref device, N_("Device to use as a camera"), N_("DEVICE")},
{"version", 'v', 0, OptionArg.NONE, ref version, N_("Output version information and exit"), null },
{null}
};
Regards,
iSight
OptionEntry might be this...
You maybe have a program that can be launched from a command line, and you have several options and arguments that can be given.
Maybe -h or --help gives you help info, while -C 2 or --context=2 gives you two lines of context in the response, while -hl="red" or --highlight="red" gives you red highlighting. For each of those, you have to do several things in the code: (1) define the short flags (2) the long flags and (3) the action to be done. So this is an array of options and the actions and types or whatever.