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<== Date ==> <== Thread ==>
Subject: Unhelpful MSI error message and behaviour
From: Eric Norum via Tech-talk <[email protected]>
To: [email protected]
Date: Fri, 9 Aug 2019 10:43:40 -0700
msi was acting up  on a new application I was developing.    When I ran make in my support module Db source directory I got:
wenorum@xildev4 488> make      
perl -CSD /eda/epics/R3.15.5/base/bin/linux-x86_64/makeMakefile.pl O.linux-x86_64 ../../..
mkdir O.Common
make -C O.linux-x86_64 -f ../Makefile TOP=../../.. \
    T_A=linux-x86_64 install
make[1]: Entering directory `/home/lxusers/w/wenorum/src/siocPowerSupplyPWM/powerSupplyPWMSup/Db/O.linux-x86_64'
/eda/epics/R3.15.5/base/bin/linux-x86_64/msi -D    -I. -I.. -I../O.Common -I../../../db -I/eda/epics/R3.15.5/modules/instrument/QF2preMonitor/head/db -I/eda/epics/R3.15.5/modules/soft/asyn/asyn4-31/db -I/eda/epics/R3.15.5/modules/soft/autosave/autosave-5-8/db -I/eda/epics/R3.15.5/modules/soft/iocExit/iocExit-2-0/db -I/eda/epics/R3.15.5/base/db -o ../O.Common/powerSupplyPWMSup.db -S../powerSupplyPWMSup.substitutions  > powerSupplyPWMSup.db.d
msi: No template file
Usage: msi [options] [template]
  stdin is used if neither template nor substitution file is given
  options:
    -h        Print this help message
    -D        Output file dependencies, not substitutions
    -V        Undefined macros generate an error
    -g        All macros have global scope
    -o<FILE>  Send output to <FILE>
    -I<DIR>   Add <DIR> to include file search path
    -M<SUBST> Add <SUBST> to (global) macro definitions
              (<SUBST> takes the form VAR=VALUE,...)
    -S<FILE>  Expand the substitutions in FILE
Inflating database from ../powerSupplyPWMSup.substitutions 
/eda/epics/R3.15.5/base/bin/linux-x86_64/msi    -I. -I.. -I../O.Common -I../../../db -I/eda/epics/R3.15.5/modules/instrument/QF2preMonitor/head/db -I/eda/epics/R3.15.5/modules/soft/asyn/asyn4-31/db -I/eda/epics/R3.15.5/modules/soft/autosave/autosave-5-8/db -I/eda/epics/R3.15.5/modules/soft/iocExit/iocExit-2-0/db -I/eda/epics/R3.15.5/base/db -o powerSupplyPWMSup.db -S../powerSupplyPWMSup.substitutions 
msi: No template file
Usage: msi [options] [template]
  stdin is used if neither template nor substitution file is given
  options:
    -h        Print this help message
    -D        Output file dependencies, not substitutions
    -V        Undefined macros generate an error
    -g        All macros have global scope
    -o<FILE>  Send output to <FILE>
    -I<DIR>   Add <DIR> to include file search path
    -M<SUBST> Add <SUBST> to (global) macro definitions
              (<SUBST> takes the form VAR=VALUE,...)
    -S<FILE>  Expand the substitutions in FILE
make[1]: *** [../O.Common/powerSupplyPWMSup.db] Error 1
make[1]: Leaving directory `/home/lxusers/w/wenorum/src/siocPowerSupplyPWM/powerSupplyPWMSup/Db/O.linux-x86_64'
make: *** [install.linux-x86_64] Error 2
wenorum@xildev4 489> 

But the msi runs seemed to have succeeded:
wenorum@xildev4 489> ls O.linux-x86_64/
Makefile  powerSupplyPWMSup.db  powerSupplyPWMSup.db.d
Running msi again produced a .db file in the support module <TOP>/db/ directory.

The problem was an extra closing brace in the substitutions file:
wenorum@xildev4 491> cat powerSupplyPWMSup.substitutions 
file "perFPGA.template"
{ pattern
{    P,      R,      PORT  }
{"\$(P)","\$(R)","\$(PORT)" }
}

file "perBridge.template"
{ pattern
{    P,      R,      PORT,   C }
{"\$(P)","\$(R)","\$(PORT)", 0 }}
}


So the error was in my code, but the error message produced by msi was pretty unhelpful.  Something like “powerSupplyPWMSup.substitutions:10 — syntax error" would have been a lot more useful.  Also it would probably be better if msi  and/or the make system could remove any output file when the source contains syntax errors.

Any chance of these changes making it in to the next release?

I’d also like to send my thanks to Andrew Johnson for providing the extra set of eyes that caught my typo in the substitutions file!
-- 
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