Re: [boost] autoconf-like configure on RC_1_33_0 branch

From: troy d. straszheim (troy_at_[hidden])
Date: 2005-10-31 12:00:58

On Mon, Oct 31, 2005 at 10:15:49AM -0500, Doug Gregor wrote:
> I'm CC'ing John Maddock, who is in charge of the config library. It 
> turns out that we're talking about two different "configure" scripts: I 
> was referring to the new one in the Boost root directory, whereas 
> you've found some issues with the one in libs/config. Sorry about the 
> confusion!

Hey Doug,

The one in BOOST_ROOT doesn't work on platforms that have a real
bourne shell and not bash in disguise (I'm guessing you wrote that on
a linux box?).  FreeBSD 5.4 doesn't like it, for instance... Bourne
shell's comparison is a single =, not ==.

diff -r1.3.2.2 configure                                         
73c73                                                            
<               if test $library == python; then                 
---                                                              
>               if test $library = python; then                  
79c79                                                            
<           if test "x$requested_python" != xyes; then           
---                                                              
>           if test "x$requested_python" != "xyes" ; then        
93c93                                                            
<           if test $library == python; then                     
---                                                              
>           if test $library = python; then                      
175c175                                                          
< if test "x$TOOLSET" == x; then                                 
---                                                              
> if test "x$TOOLSET" = "x" ; then                               
182c182                                                          
< if test "x$BJAM" == x; then                                    
---                                                              
> if test "x$BJAM" = "x" ; then                                  
195c195                                                          
< if test "x$flag_show_libraries" == xyes; then                  
---                                                              
> if test "x$flag_show_libraries" = "xyes"; then                 
213c213                                                          
< if test "x$EPREFIX" == x; then                                 
---                                                              
> if test "x$EPREFIX" = "x" ; then                               
217c217                                                          
< if test "x$LIBDIR" == x; then                                  
---                                                              
> if test "x$LIBDIR" = "x" ; then                                
221c221                                                          
< if test "x$INCLUDEDIR" == x; then                              
---                                                              
> if test "x$INCLUDEDIR" = "x" ; then                            
226,227c226,227                                                  
< if test "x$flag_no_python" == x; then                          
<     if test "x$PYTHON_VERSION" == x; then                      
---                                                              
> if test "x$flag_no_python" = "x" ; then                        
>     if test "x$PYTHON_VERSION" = "x" ; then                    
233c233                                                          
<     if test "x$PYTHON_ROOT" == x; then                         
---                                                              
>     if test "x$PYTHON_ROOT" = "x" ; then                       
244,245c244,245                                                  
< if test "x$flag_icu" == xyes; then                             
<   if test "x$ICU_ROOT" == x; then                              
---                                                              
> if test "x$flag_icu" = "xyes"; then                            
>   if test "x$ICU_ROOT" = "x" ; then                            

If you run ./configure --with-python=/no/such/python the script still
runs to the end, like this:

Building Boost.Jam with toolset gcc... tools/build/jam_src/bin.freebsd/bjam 
Detecting Python version... ./configure: /no/such/python: not found         
                                                                            
Detecting Python root... ./configure: /no/such/python: not found            
                                                                            
Unicode/ICU support for Boost.Regex?... no.                                 
Generating Makefile...                                                      

FWIW, it might be nice to specify "#!/bin/sh -e" so that the script
would not generate a makefile if there is an error... as far as I got
with that is that "tools/build/jam_src/build.sh --guess-toolset" exits
with status 1 even though it has correctly determined that the toolset
here is "gcc", which then stops "configure".  I could poke further if
you like...

-t