Re: [Boost-build] SHELL command putting a newline at end of string

From: Jorge Suit Perez Ronda (josp.jorge_at_[hidden])
Date: 2007-08-06 03:21:04

hello, try this:

rule trim-nl ( str )
{
   return [ MATCH "([^
]*)" : $(str) ] ;
}

rule _shell ( cmd )
{
   return [ trim-nl [ SHELL $(cmd) ] ] ;
}

now instead of invoking SHELL, invoke _shell

be carefully when typing the rule trim-nl, the value "([
]*)" should be typed exactly as it appears in this mail: the character ^ 
should be the last in the line and the following ] should be the first 
in the next line.

hope it helps,

Jorge

Chris Stankevitz wrote:
> Hello,
> 
> The following Jamroot file does not work because a
> newline is embedded at the end of the variable that is
> filled with SHELL.
> 
> # Begin Jamroot
> local wx_cppflags = [ SHELL "wx-config --cppflags" ] ;
> 
> exe hello : hello.cpp : <cxxflags>"$(wx_cppflags)" ;
> # End Jamroot
> 
> How can I remove this newline?  I tried replacing the
> SHELL command with "wx-config --cppflags | head -n 1 |
> sed -e s/\s$//"; However, the newline persisted which
> leads me to believe Boost.Jam has appended it.
> 
> Thank you,
> 
> Chris
> 
> # Output
> cstankevitz_at_cstankevitz-laptop:~/temp$ bjam
> ...found 8 targets...
> ...updating 2 targets...
> gcc.compile.c++ bin/gcc/debug/hello.o
> g++: no input files
> /bin/sh: -c: not found
> 
>     "g++"  -ftemplate-depth-128 -O0 -fno-inline -Wall
> -g -fPIC
> -I/usr/lib/wx/include/gtk2-unicode-release-2.6
> -I/usr/include/wx-2.6 -DGTK_NO_CHECK_CASTS -D__WXGTK__
> -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -DNO_GCC_PRAGMA
>    -c -o "bin/gcc/debug/hello.o" "hello.cpp" 
> 
> ...failed gcc.compile.c++ bin/gcc/debug/hello.o...
> ...skipped <pbin/gcc/debug>hello for lack of
> <pbin/gcc/debug>hello.o...
> ...failed updating 1 target...
> ...skipped 1 target...
> cstankevitz_at_cstankevitz-laptop:~/temp$ 
> 
> 
>        
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